{ "contractName": "ERC721", "abi": [ { "inputs": [], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "approved", "type": "address" }, { "indexed": true, "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "operator", "type": "address" }, { "indexed": false, "internalType": "bool", "name": "approved", "type": "bool" } ], "name": "ApprovalForAll", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": true, "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "constant": true, "inputs": [ { "internalType": "bytes4", "name": "interfaceId", "type": "bytes4" } ], "name": "supportsInterface", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "owner", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "ownerOf", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "approve", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "getApproved", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "bool", "name": "approved", "type": "bool" } ], "name": "setApprovalForAll", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "operator", "type": "address" } ], "name": "isApprovedForAll", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "transferFrom", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "safeTransferFrom", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" }, { "internalType": "bytes", "name": "_data", "type": "bytes" } ], "name": "safeTransferFrom", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.5.16+commit.9c3226ce\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"approved\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"bool\",\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"ApprovalForAll\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"getApproved\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"}],\"name\":\"isApprovedForAll\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"ownerOf\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"bool\",\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"setApprovalForAll\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"bytes4\",\"name\":\"interfaceId\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md\",\"methods\":{\"approve(address,uint256)\":{\"details\":\"Approves another address to transfer the given token ID The zero address indicates there is no approved address. There can only be one approved address per token at a given time. Can only be called by the token owner or an approved operator.\",\"params\":{\"to\":\"address to be approved for the given token ID\",\"tokenId\":\"uint256 ID of the token to be approved\"}},\"balanceOf(address)\":{\"details\":\"Gets the balance of the specified address\",\"params\":{\"owner\":\"address to query the balance of\"},\"return\":\"uint256 representing the amount owned by the passed address\"},\"getApproved(uint256)\":{\"details\":\"Gets the approved address for a token ID, or zero if no address set Reverts if the token ID does not exist.\",\"params\":{\"tokenId\":\"uint256 ID of the token to query the approval of\"},\"return\":\"address currently approved for the given token ID\"},\"isApprovedForAll(address,address)\":{\"details\":\"Tells whether an operator is approved by a given owner\",\"params\":{\"operator\":\"operator address which you want to query the approval of\",\"owner\":\"owner address which you want to query the approval of\"},\"return\":\"bool whether the given operator is approved by the given owner\"},\"ownerOf(uint256)\":{\"details\":\"Gets the owner of the specified token ID\",\"params\":{\"tokenId\":\"uint256 ID of the token to query the owner of\"},\"return\":\"owner address currently marked as the owner of the given token ID\"},\"safeTransferFrom(address,address,uint256)\":{\"details\":\"Safely transfers the ownership of a given token ID to another address If the target address is a contract, it must implement `onERC721Received`, which is called upon a safe transfer, and return the magic value `bytes4(keccak256(\\\"onERC721Received(address,address,uint256,bytes)\\\"))`; otherwise, the transfer is reverted. * Requires the msg sender to be the owner, approved, or operator\",\"params\":{\"from\":\"current owner of the token\",\"to\":\"address to receive the ownership of the given token ID\",\"tokenId\":\"uint256 ID of the token to be transferred\"}},\"safeTransferFrom(address,address,uint256,bytes)\":{\"details\":\"Safely transfers the ownership of a given token ID to another address If the target address is a contract, it must implement `onERC721Received`, which is called upon a safe transfer, and return the magic value `bytes4(keccak256(\\\"onERC721Received(address,address,uint256,bytes)\\\"))`; otherwise, the transfer is reverted. Requires the msg sender to be the owner, approved, or operator\",\"params\":{\"_data\":\"bytes data to send along with a safe transfer check\",\"from\":\"current owner of the token\",\"to\":\"address to receive the ownership of the given token ID\",\"tokenId\":\"uint256 ID of the token to be transferred\"}},\"setApprovalForAll(address,bool)\":{\"details\":\"Sets or unsets the approval of a given operator An operator is allowed to transfer all tokens of the sender on their behalf\",\"params\":{\"approved\":\"representing the status of the approval to be set\",\"to\":\"operator address to set the approval\"}},\"supportsInterface(bytes4)\":{\"details\":\"implement supportsInterface(bytes4) using a lookup table\"},\"transferFrom(address,address,uint256)\":{\"details\":\"Transfers the ownership of a given token ID to another address Usage of this method is discouraged, use `safeTransferFrom` whenever possible Requires the msg sender to be the owner, approved, or operator\",\"params\":{\"from\":\"current owner of the token\",\"to\":\"address to receive the ownership of the given token ID\",\"tokenId\":\"uint256 ID of the token to be transferred\"}}},\"title\":\"ERC721 Non-Fungible Token Standard basic implementation\"},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"openzeppelin-solidity/contracts/token/ERC721/ERC721.sol\":\"ERC721\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"openzeppelin-solidity/contracts/introspection/ERC165.sol\":{\"keccak256\":\"0x9da23588f58d0fa67097984e151bdaa6aa69c5e192bae17b44a90b0cfc194736\",\"urls\":[\"bzz-raw://5e88c7dbb4d1e6d3f133112b9994491b8531f5d9103cf41becd1c267d2cd67af\",\"dweb:/ipfs/QmNuSmDBgv616hXRshbHx48ufdZoSrcFHpwqP4iPg2ac4X\"]},\"openzeppelin-solidity/contracts/introspection/IERC165.sol\":{\"keccak256\":\"0xbbb6159006ae3639daea09f7d63987816d6cf3a99f52af919363e025d3abf3b8\",\"urls\":[\"bzz-raw://35e7d742ee71461779df12a0ab1ad4701144d98eb6401182838c8daf40b008dd\",\"dweb:/ipfs/QmY4t7pxcX2cfk6VsGJWZLBgoKMpRctY8X1HPxykLjptSi\"]},\"openzeppelin-solidity/contracts/math/SafeMath.sol\":{\"keccak256\":\"0x965012d27b4262d7a41f5028cbb30c51ebd9ecd4be8fb30380aaa7a3c64fbc8b\",\"urls\":[\"bzz-raw://1eb493553b27efd46c231a836a83ce50d215639feb97b4aac9f301d0fd034ff5\",\"dweb:/ipfs/QmbMdvSXcqGKxeeYvzF3VrWpoHQyVzMXBhzhAokF2Gdymv\"]},\"openzeppelin-solidity/contracts/token/ERC721/ERC721.sol\":{\"keccak256\":\"0x0546fa662082b36ac9cbd418c0722a3c52718b9dc3fe3e284081d73f48036228\",\"urls\":[\"bzz-raw://a50dd4c1c7afa4ade53ee47bc782eaad72a45091ed9756081616b33eb6c150c4\",\"dweb:/ipfs/Qmb88e4EnSbJv2BbayFg6wZpFMJ9aPF7r4cwMjnZkUu4VK\"]},\"openzeppelin-solidity/contracts/token/ERC721/IERC721.sol\":{\"keccak256\":\"0x1f059ee943273719130df645fa38069b792988e8b732585528d5b1265f5aa046\",\"urls\":[\"bzz-raw://31e4d99091a83a42a6ea14d74ceae2ec3ffb2905c7ee07358875af72ea188333\",\"dweb:/ipfs/Qmf7nHc6BwhbyawapCVRZHzhBHNoA8ftpQWmGSyToVKVzN\"]},\"openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol\":{\"keccak256\":\"0x5e7281dbd14cf07af0974ce830c6242062cd430b70658878d49b5f5c1e2ec0aa\",\"urls\":[\"bzz-raw://3c9374b456bf5fde2c473331ff75bed9c6be3634948ba6a6507e4c19c2abf605\",\"dweb:/ipfs/QmUm5NKd1ToSr8MHVVanQv3XEkQpmYKw2441KXYyXPE6np\"]},\"openzeppelin-solidity/contracts/utils/Address.sol\":{\"keccak256\":\"0x5c731061b804fa256fc8c05150eafe5d20b6bb94541a8f187912bf84f7033f34\",\"urls\":[\"bzz-raw://a3c2d9f046beebab7fb41b1b124a6a124a36f510f7c67365861402ac831bdc71\",\"dweb:/ipfs/QmUtASRgitregbKH83anopLtF9vFQe3BKeAjhUa6F7t9YV\"]}},\"version\":1}", 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"source": "pragma solidity ^0.5.0;\n\nimport \"./IERC721.sol\";\nimport \"./IERC721Receiver.sol\";\nimport \"../../math/SafeMath.sol\";\nimport \"../../utils/Address.sol\";\nimport \"../../introspection/ERC165.sol\";\n\n/**\n * @title ERC721 Non-Fungible Token Standard basic implementation\n * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md\n */\ncontract ERC721 is ERC165, IERC721 {\n using SafeMath for uint256;\n using Address for address;\n\n // Equals to `bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`\n // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`\n bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;\n\n // Mapping from token ID to owner\n mapping (uint256 => address) private _tokenOwner;\n\n // Mapping from token ID to approved address\n mapping (uint256 => address) private _tokenApprovals;\n\n // Mapping from owner to number of owned token\n mapping (address => uint256) private _ownedTokensCount;\n\n // Mapping from owner to operator approvals\n mapping (address => mapping (address => bool)) private _operatorApprovals;\n\n bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;\n /*\n * 0x80ac58cd ===\n * bytes4(keccak256('balanceOf(address)')) ^\n * bytes4(keccak256('ownerOf(uint256)')) ^\n * bytes4(keccak256('approve(address,uint256)')) ^\n * bytes4(keccak256('getApproved(uint256)')) ^\n * bytes4(keccak256('setApprovalForAll(address,bool)')) ^\n * bytes4(keccak256('isApprovedForAll(address,address)')) ^\n * bytes4(keccak256('transferFrom(address,address,uint256)')) ^\n * bytes4(keccak256('safeTransferFrom(address,address,uint256)')) ^\n * bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)'))\n */\n\n constructor () public {\n // register the supported interfaces to conform to ERC721 via ERC165\n _registerInterface(_INTERFACE_ID_ERC721);\n }\n\n /**\n * @dev Gets the balance of the specified address\n * @param owner address to query the balance of\n * @return uint256 representing the amount owned by the passed address\n */\n function balanceOf(address owner) public view returns (uint256) {\n require(owner != address(0));\n return _ownedTokensCount[owner];\n }\n\n /**\n * @dev Gets the owner of the specified token ID\n * @param tokenId uint256 ID of the token to query the owner of\n * @return owner address currently marked as the owner of the given token ID\n */\n function ownerOf(uint256 tokenId) public view returns (address) {\n address owner = _tokenOwner[tokenId];\n require(owner != address(0));\n return owner;\n }\n\n /**\n * @dev Approves another address to transfer the given token ID\n * The zero address indicates there is no approved address.\n * There can only be one approved address per token at a given time.\n * Can only be called by the token owner or an approved operator.\n * @param to address to be approved for the given token ID\n * @param tokenId uint256 ID of the token to be approved\n */\n function approve(address to, uint256 tokenId) public {\n address owner = ownerOf(tokenId);\n require(to != owner);\n require(msg.sender == owner || isApprovedForAll(owner, msg.sender));\n\n _tokenApprovals[tokenId] = to;\n emit Approval(owner, to, tokenId);\n }\n\n /**\n * @dev Gets the approved address for a token ID, or zero if no address set\n * Reverts if the token ID does not exist.\n * @param tokenId uint256 ID of the token to query the approval of\n * @return address currently approved for the given token ID\n */\n function getApproved(uint256 tokenId) public view returns (address) {\n require(_exists(tokenId));\n return _tokenApprovals[tokenId];\n }\n\n /**\n * @dev Sets or unsets the approval of a given operator\n * An operator is allowed to transfer all tokens of the sender on their behalf\n * @param to operator address to set the approval\n * @param approved representing the status of the approval to be set\n */\n function setApprovalForAll(address to, bool approved) public {\n require(to != msg.sender);\n _operatorApprovals[msg.sender][to] = approved;\n emit ApprovalForAll(msg.sender, to, approved);\n }\n\n /**\n * @dev Tells whether an operator is approved by a given owner\n * @param owner owner address which you want to query the approval of\n * @param operator operator address which you want to query the approval of\n * @return bool whether the given operator is approved by the given owner\n */\n function isApprovedForAll(address owner, address operator) public view returns (bool) {\n return _operatorApprovals[owner][operator];\n }\n\n /**\n * @dev Transfers the ownership of a given token ID to another address\n * Usage of this method is discouraged, use `safeTransferFrom` whenever possible\n * Requires the msg sender to be the owner, approved, or operator\n * @param from current owner of the token\n * @param to address to receive the ownership of the given token ID\n * @param tokenId uint256 ID of the token to be transferred\n */\n function transferFrom(address from, address to, uint256 tokenId) public {\n require(_isApprovedOrOwner(msg.sender, tokenId));\n\n _transferFrom(from, to, tokenId);\n }\n\n /**\n * @dev Safely transfers the ownership of a given token ID to another address\n * If the target address is a contract, it must implement `onERC721Received`,\n * which is called upon a safe transfer, and return the magic value\n * `bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`; otherwise,\n * the transfer is reverted.\n *\n * Requires the msg sender to be the owner, approved, or operator\n * @param from current owner of the token\n * @param to address to receive the ownership of the given token ID\n * @param tokenId uint256 ID of the token to be transferred\n */\n function safeTransferFrom(address from, address to, uint256 tokenId) public {\n safeTransferFrom(from, to, tokenId, \"\");\n }\n\n /**\n * @dev Safely transfers the ownership of a given token ID to another address\n * If the target address is a contract, it must implement `onERC721Received`,\n * which is called upon a safe transfer, and return the magic value\n * `bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`; otherwise,\n * the transfer is reverted.\n * Requires the msg sender to be the owner, approved, or operator\n * @param from current owner of the token\n * @param to address to receive the ownership of the given token ID\n * @param tokenId uint256 ID of the token to be transferred\n * @param _data bytes data to send along with a safe transfer check\n */\n function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public {\n transferFrom(from, to, tokenId);\n require(_checkOnERC721Received(from, to, tokenId, _data));\n }\n\n /**\n * @dev Returns whether the specified token exists\n * @param tokenId uint256 ID of the token to query the existence of\n * @return whether the token exists\n */\n function _exists(uint256 tokenId) internal view returns (bool) {\n address owner = _tokenOwner[tokenId];\n return owner != address(0);\n }\n\n /**\n * @dev Returns whether the given spender can transfer a given token ID\n * @param spender address of the spender to query\n * @param tokenId uint256 ID of the token to be transferred\n * @return bool whether the msg.sender is approved for the given token ID,\n * is an operator of the owner, or is the owner of the token\n */\n function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) {\n address owner = ownerOf(tokenId);\n return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));\n }\n\n /**\n * @dev Internal function to mint a new token\n * Reverts if the given token ID already exists\n * @param to The address that will own the minted token\n * @param tokenId uint256 ID of the token to be minted\n */\n function _mint(address to, uint256 tokenId) internal {\n require(to != address(0));\n require(!_exists(tokenId));\n\n _tokenOwner[tokenId] = to;\n _ownedTokensCount[to] = _ownedTokensCount[to].add(1);\n\n emit Transfer(address(0), to, tokenId);\n }\n\n /**\n * @dev Internal function to burn a specific token\n * Reverts if the token does not exist\n * Deprecated, use _burn(uint256) instead.\n * @param owner owner of the token to burn\n * @param tokenId uint256 ID of the token being burned\n */\n function _burn(address owner, uint256 tokenId) internal {\n require(ownerOf(tokenId) == owner);\n\n _clearApproval(tokenId);\n\n _ownedTokensCount[owner] = _ownedTokensCount[owner].sub(1);\n _tokenOwner[tokenId] = address(0);\n\n emit Transfer(owner, address(0), tokenId);\n }\n\n /**\n * @dev Internal function to burn a specific token\n * Reverts if the token does not exist\n * @param tokenId uint256 ID of the token being burned\n */\n function _burn(uint256 tokenId) internal {\n _burn(ownerOf(tokenId), tokenId);\n }\n\n /**\n * @dev Internal function to transfer ownership of a given token ID to another address.\n * As opposed to transferFrom, this imposes no restrictions on msg.sender.\n * @param from current owner of the token\n * @param to address to receive the ownership of the given token ID\n * @param tokenId uint256 ID of the token to be transferred\n */\n function _transferFrom(address from, address to, uint256 tokenId) internal {\n require(ownerOf(tokenId) == from);\n require(to != address(0));\n\n _clearApproval(tokenId);\n\n _ownedTokensCount[from] = _ownedTokensCount[from].sub(1);\n _ownedTokensCount[to] = _ownedTokensCount[to].add(1);\n\n _tokenOwner[tokenId] = to;\n\n emit Transfer(from, to, tokenId);\n }\n\n /**\n * @dev Internal function to invoke `onERC721Received` on a target address\n * The call is not executed if the target address is not a contract\n * @param from address representing the previous owner of the given token ID\n * @param to target address that will receive the tokens\n * @param tokenId uint256 ID of the token to be transferred\n * @param _data bytes optional data to send along with the call\n * @return whether the call correctly returned the expected magic value\n */\n function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)\n internal returns (bool)\n {\n if (!to.isContract()) {\n return true;\n }\n\n bytes4 retval = IERC721Receiver(to).onERC721Received(msg.sender, from, tokenId, _data);\n return (retval == _ERC721_RECEIVED);\n }\n\n /**\n * @dev Private function to clear current approval of a given token ID\n * @param tokenId uint256 ID of the token to be transferred\n */\n function _clearApproval(uint256 tokenId) private {\n if (_tokenApprovals[tokenId] != address(0)) {\n _tokenApprovals[tokenId] = address(0);\n }\n }\n}\n", "sourcePath": "openzeppelin-solidity/contracts/token/ERC721/ERC721.sol", "ast": { "absolutePath": "openzeppelin-solidity/contracts/token/ERC721/ERC721.sol", "exportedSymbols": { "ERC721": [ 12857 ] }, "id": 12858, "nodeType": "SourceUnit", "nodes": [ { "id": 12300, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:52" }, { "absolutePath": "openzeppelin-solidity/contracts/token/ERC721/IERC721.sol", "file": "./IERC721.sol", "id": 12301, "nodeType": "ImportDirective", "scope": 12858, "sourceUnit": 12961, "src": "25:23:52", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol", "file": "./IERC721Receiver.sol", "id": 12302, "nodeType": "ImportDirective", "scope": 12858, "sourceUnit": 12977, "src": "49:31:52", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/math/SafeMath.sol", "file": "../../math/SafeMath.sol", "id": 12303, "nodeType": "ImportDirective", "scope": 12858, "sourceUnit": 12190, "src": "81:33:52", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/utils/Address.sol", "file": "../../utils/Address.sol", "id": 12304, "nodeType": "ImportDirective", "scope": 12858, "sourceUnit": 12996, "src": "115:33:52", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/introspection/ERC165.sol", "file": "../../introspection/ERC165.sol", "id": 12305, "nodeType": "ImportDirective", "scope": 12858, "sourceUnit": 12052, "src": "149:40:52", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 12306, "name": "ERC165", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 12051, "src": "357:6:52", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC165_$12051", "typeString": "contract ERC165" } }, "id": 12307, "nodeType": "InheritanceSpecifier", "src": "357:6:52" }, { "arguments": null, "baseName": { "contractScope": null, "id": 12308, "name": "IERC721", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 12960, "src": "365:7:52", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC721_$12960", "typeString": "contract IERC721" } }, "id": 12309, "nodeType": "InheritanceSpecifier", "src": "365:7:52" } ], "contractDependencies": [ 12051, 12061, 12960 ], "contractKind": "contract", "documentation": "@title ERC721 Non-Fungible Token Standard basic implementation\n@dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md", "fullyImplemented": true, "id": 12857, "linearizedBaseContracts": [ 12857, 12960, 12051, 12061 ], "name": "ERC721", "nodeType": "ContractDefinition", "nodes": [ { "id": 12312, "libraryName": { "contractScope": null, "id": 12310, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 12189, "src": "385:8:52", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$12189", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "379:27:52", "typeName": { "id": 12311, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "398:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "id": 12315, "libraryName": { "contractScope": null, "id": 12313, "name": "Address", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 12995, "src": "417:7:52", "typeDescriptions": { "typeIdentifier": "t_contract$_Address_$12995", "typeString": "library Address" } }, "nodeType": "UsingForDirective", "src": "411:26:52", "typeName": { "id": 12314, "name": "address", "nodeType": "ElementaryTypeName", "src": "429:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, { "constant": true, "id": 12318, "name": "_ERC721_RECEIVED", "nodeType": "VariableDeclaration", "scope": 12857, "src": "615:53:52", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 12316, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "615:6:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, "hexValue": "30783135306237613032", "id": 12317, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "658:10:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_353073666_by_1", "typeString": "int_const 353073666" }, "value": "0x150b7a02" }, "visibility": "private" }, { "constant": false, "id": 12322, "name": "_tokenOwner", "nodeType": "VariableDeclaration", "scope": 12857, "src": "713:48:52", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "typeName": { "id": 12321, "keyType": { "id": 12319, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "722:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Mapping", "src": "713:28:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "valueType": { "id": 12320, "name": "address", "nodeType": "ElementaryTypeName", "src": "733:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "value": null, "visibility": "private" }, { "constant": false, "id": 12326, "name": "_tokenApprovals", "nodeType": "VariableDeclaration", "scope": 12857, "src": "817:52:52", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "typeName": { "id": 12325, "keyType": { "id": 12323, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "826:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Mapping", "src": "817:28:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "valueType": { "id": 12324, "name": "address", "nodeType": "ElementaryTypeName", "src": "837:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "value": null, "visibility": "private" }, { "constant": false, "id": 12330, "name": "_ownedTokensCount", "nodeType": "VariableDeclaration", "scope": 12857, "src": "927:54:52", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 12329, "keyType": { "id": 12327, "name": "address", "nodeType": "ElementaryTypeName", "src": "936:7:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "927:28:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 12328, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "947:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "value": null, "visibility": "private" }, { "constant": false, "id": 12336, "name": "_operatorApprovals", "nodeType": "VariableDeclaration", "scope": 12857, "src": "1036:73:52", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" }, "typeName": { "id": 12335, "keyType": { "id": 12331, "name": "address", "nodeType": "ElementaryTypeName", "src": "1045:7:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1036:46:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" }, "valueType": { "id": 12334, "keyType": { "id": 12332, "name": "address", "nodeType": "ElementaryTypeName", "src": "1065:7:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1056:25:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" }, "valueType": { "id": 12333, "name": "bool", "nodeType": "ElementaryTypeName", "src": "1076:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } } }, "value": null, "visibility": "private" }, { "constant": true, "id": 12339, "name": "_INTERFACE_ID_ERC721", "nodeType": "VariableDeclaration", "scope": 12857, "src": "1116:57:52", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 12337, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "1116:6:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, "hexValue": "30783830616335386364", "id": 12338, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1163:10:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_2158778573_by_1", "typeString": "int_const 2158778573" }, "value": "0x80ac58cd" }, "visibility": "private" }, { "body": { "id": 12346, "nodeType": "Block", "src": "1819:134:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12343, "name": "_INTERFACE_ID_ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12339, "src": "1925:20:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } ], "id": 12342, "name": "_registerInterface", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12050, "src": "1906:18:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_bytes4_$returns$__$", "typeString": "function (bytes4)" } }, "id": 12344, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1906:40:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12345, "nodeType": "ExpressionStatement", "src": "1906:40:52" } ] }, "documentation": null, "id": 12347, "implemented": true, "kind": "constructor", "modifiers": [], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 12340, "nodeType": "ParameterList", "parameters": [], "src": "1809:2:52" }, "returnParameters": { "id": 12341, "nodeType": "ParameterList", "parameters": [], "src": "1819:0:52" }, "scope": 12857, "src": "1797:156:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 12366, "nodeType": "Block", "src": "2220:86:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12359, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12355, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12349, "src": "2238:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12357, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2255:1:52", "subdenomination": null, "typeDescriptions": { 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"Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "2230:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12360, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2230:28:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12361, "nodeType": "ExpressionStatement", "src": "2230:28:52" }, { "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12362, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "2275:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12364, "indexExpression": { "argumentTypes": null, "id": 12363, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12349, "src": "2293:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2275:24:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 12353, "id": 12365, "nodeType": "Return", "src": "2268:31:52" } ] }, "documentation": "@dev Gets the balance of the specified address\n@param owner address to query the balance of\n@return uint256 representing the amount owned by the passed address", "id": 12367, "implemented": true, "kind": "function", "modifiers": [], "name": "balanceOf", "nodeType": "FunctionDefinition", "parameters": { "id": 12350, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12349, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12367, "src": "2175:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12348, "name": "address", "nodeType": "ElementaryTypeName", "src": "2175:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "2174:15:52" }, "returnParameters": { "id": 12353, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12352, "name": "", "nodeType": "VariableDeclaration", "scope": 12367, "src": "2211:7:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12351, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2211:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2210:9:52" }, "scope": 12857, "src": "2156:150:52", "stateMutability": "view", "superFunction": 12893, "visibility": "public" }, { "body": { "id": 12390, "nodeType": "Block", "src": "2594:113:52", "statements": [ { "assignments": [ 12375 ], "declarations": [ { "constant": false, "id": 12375, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12390, "src": "2604:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12374, "name": "address", "nodeType": "ElementaryTypeName", "src": "2604:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 12379, "initialValue": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12376, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12322, "src": "2620:11:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12378, "indexExpression": { "argumentTypes": null, "id": 12377, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12369, "src": "2632:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2620:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "2604:36:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12385, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12381, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12375, "src": "2658:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12383, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2675:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12382, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2667:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12384, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2667:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "2658:19:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12380, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "2650:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12386, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2650:28:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12387, "nodeType": "ExpressionStatement", "src": "2650:28:52" }, { "expression": { "argumentTypes": null, "id": 12388, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12375, "src": "2695:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 12373, "id": 12389, "nodeType": "Return", "src": "2688:12:52" } ] }, "documentation": "@dev Gets the owner of the specified token ID\n@param tokenId uint256 ID of the token to query the owner of\n@return owner address currently marked as the owner of the given token ID", "id": 12391, "implemented": true, "kind": "function", "modifiers": [], "name": "ownerOf", "nodeType": "FunctionDefinition", "parameters": { "id": 12370, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12369, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12391, "src": "2547:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12368, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2547:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2546:17:52" }, "returnParameters": { "id": 12373, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12372, "name": "", "nodeType": "VariableDeclaration", "scope": 12391, "src": "2585:7:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12371, "name": "address", "nodeType": "ElementaryTypeName", "src": "2585:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "2584:9:52" }, "scope": 12857, "src": "2530:177:52", "stateMutability": "view", "superFunction": 12900, "visibility": "public" }, { "body": { "id": 12435, "nodeType": "Block", "src": "3181:239:52", "statements": [ { "assignments": [ 12399 ], "declarations": [ { "constant": false, "id": 12399, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12435, "src": "3191:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12398, "name": "address", "nodeType": "ElementaryTypeName", "src": "3191:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 12403, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12401, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12395, "src": "3215:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12400, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "3207:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12402, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3207:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "3191:32:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12407, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12405, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12393, "src": "3241:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "id": 12406, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12399, "src": "3247:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3241:11:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12404, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "3233:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12408, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3233:20:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12409, "nodeType": "ExpressionStatement", "src": "3233:20:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 12420, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12414, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12411, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "3271:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12412, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3271:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12413, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12399, "src": "3285:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3271:19:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12416, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12399, "src": "3311:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12417, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "3318:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12418, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3318:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" } ], "id": 12415, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [ 12501 ], "referencedDeclaration": 12501, "src": "3294:16:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 12419, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3294:35:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "3271:58:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12410, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "3263:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12421, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3263:67:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12422, "nodeType": "ExpressionStatement", "src": "3263:67:52" }, { "expression": { "argumentTypes": null, "id": 12427, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12423, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12326, "src": "3341:15:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12425, "indexExpression": { "argumentTypes": null, "id": 12424, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12395, "src": "3357:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "3341:24:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 12426, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12393, "src": "3368:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3341:29:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12428, "nodeType": "ExpressionStatement", "src": "3341:29:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12430, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12399, "src": "3394:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12431, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12393, "src": "3401:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12432, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12395, "src": "3405:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12429, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12878, "src": "3385:8:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12433, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3385:28:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12434, "nodeType": "EmitStatement", "src": "3380:33:52" } ] }, "documentation": "@dev Approves another address to transfer the given token ID\nThe zero address indicates there is no approved address.\nThere can only be one approved address per token at a given time.\nCan only be called by the token owner or an approved operator.\n@param to address to be approved for the given token ID\n@param tokenId uint256 ID of the token to be approved", "id": 12436, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nodeType": "FunctionDefinition", "parameters": { "id": 12396, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12393, "name": "to", "nodeType": "VariableDeclaration", "scope": 12436, "src": "3145:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12392, "name": "address", "nodeType": "ElementaryTypeName", "src": "3145:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12395, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12436, "src": "3157:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12394, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3157:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3144:29:52" }, "returnParameters": { "id": 12397, "nodeType": "ParameterList", "parameters": [], "src": "3181:0:52" }, "scope": 12857, "src": "3128:292:52", "stateMutability": "nonpayable", "superFunction": 12907, "visibility": "public" }, { "body": { "id": 12453, "nodeType": "Block", "src": "3773:83:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12445, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12438, "src": "3799:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12444, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12589, "src": "3791:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 12446, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3791:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12443, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "3783:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12447, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3783:25:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12448, "nodeType": "ExpressionStatement", "src": "3783:25:52" }, { "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12449, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12326, "src": "3825:15:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12451, "indexExpression": { "argumentTypes": null, "id": 12450, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12438, "src": "3841:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3825:24:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 12442, "id": 12452, "nodeType": "Return", "src": "3818:31:52" } ] }, "documentation": "@dev Gets the approved address for a token ID, or zero if no address set\nReverts if the token ID does not exist.\n@param tokenId uint256 ID of the token to query the approval of\n@return address currently approved for the given token ID", "id": 12454, "implemented": true, "kind": "function", "modifiers": [], "name": "getApproved", "nodeType": "FunctionDefinition", "parameters": { "id": 12439, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12438, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12454, "src": "3726:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12437, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3726:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3725:17:52" }, "returnParameters": { "id": 12442, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12441, "name": "", "nodeType": "VariableDeclaration", "scope": 12454, "src": "3764:7:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12440, "name": "address", "nodeType": "ElementaryTypeName", "src": "3764:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "3763:9:52" }, "scope": 12857, "src": "3705:151:52", "stateMutability": "view", "superFunction": 12914, "visibility": "public" }, { "body": { "id": 12484, "nodeType": "Block", "src": "4209:152:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12465, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12462, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12456, "src": "4227:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12463, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "4233:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12464, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4233:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "4227:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12461, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "4219:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12466, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4219:25:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12467, "nodeType": "ExpressionStatement", "src": "4219:25:52" }, { "expression": { "argumentTypes": null, "id": 12475, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12468, "name": "_operatorApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12336, "src": "4254:18:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" } }, "id": 12472, "indexExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12469, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "4273:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12470, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4273:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4254:30:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 12473, "indexExpression": { "argumentTypes": null, "id": 12471, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12456, "src": "4285:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "4254:34:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 12474, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12458, "src": "4291:8:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "4254:45:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 12476, "nodeType": "ExpressionStatement", "src": "4254:45:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12478, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "4329:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12479, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4329:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12480, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12456, "src": "4341:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12481, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12458, "src": "4345:8:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12477, "name": "ApprovalForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12886, "src": "4314:14:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_bool_$returns$__$", "typeString": "function (address,address,bool)" } }, "id": 12482, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4314:40:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12483, "nodeType": "EmitStatement", "src": "4309:45:52" } ] }, "documentation": "@dev Sets or unsets the approval of a given operator\nAn operator is allowed to transfer all tokens of the sender on their behalf\n@param to operator address to set the approval\n@param approved representing the status of the approval to be set", "id": 12485, "implemented": true, "kind": "function", "modifiers": [], "name": "setApprovalForAll", "nodeType": "FunctionDefinition", "parameters": { "id": 12459, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12456, "name": "to", "nodeType": "VariableDeclaration", "scope": 12485, "src": "4175:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12455, "name": "address", "nodeType": "ElementaryTypeName", "src": "4175:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12458, "name": "approved", "nodeType": "VariableDeclaration", "scope": 12485, "src": "4187:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12457, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4187:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "4174:27:52" }, "returnParameters": { "id": 12460, "nodeType": "ParameterList", "parameters": [], "src": "4209:0:52" }, "scope": 12857, "src": "4148:213:52", "stateMutability": "nonpayable", "superFunction": 12921, "visibility": "public" }, { "body": { "id": 12500, "nodeType": "Block", "src": "4768:59:52", "statements": [ { "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12494, "name": "_operatorApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12336, "src": "4785:18:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" } }, "id": 12496, "indexExpression": { "argumentTypes": null, "id": 12495, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12487, "src": "4804:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4785:25:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 12498, "indexExpression": { "argumentTypes": null, "id": 12497, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12489, "src": "4811:8:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4785:35:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 12493, "id": 12499, "nodeType": "Return", "src": "4778:42:52" } ] }, "documentation": "@dev Tells whether an operator is approved by a given owner\n@param owner owner address which you want to query the approval of\n@param operator operator address which you want to query the approval of\n@return bool whether the given operator is approved by the given owner", "id": 12501, "implemented": true, "kind": "function", "modifiers": [], "name": "isApprovedForAll", "nodeType": "FunctionDefinition", "parameters": { "id": 12490, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12487, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12501, "src": "4708:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12486, "name": "address", "nodeType": "ElementaryTypeName", "src": "4708:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12489, "name": "operator", "nodeType": "VariableDeclaration", "scope": 12501, "src": "4723:16:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12488, "name": "address", "nodeType": "ElementaryTypeName", "src": "4723:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "4707:33:52" }, "returnParameters": { "id": 12493, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12492, "name": "", "nodeType": "VariableDeclaration", "scope": 12501, "src": "4762:4:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12491, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4762:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "4761:6:52" }, "scope": 12857, "src": "4682:145:52", "stateMutability": "view", "superFunction": 12930, "visibility": "public" }, { "body": { "id": 12524, "nodeType": "Block", "src": "5332:108:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12512, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "5369:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12513, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "5369:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12514, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12507, "src": "5381:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12511, "name": "_isApprovedOrOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12621, "src": "5350:18:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) view returns (bool)" } }, "id": 12515, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5350:39:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12510, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "5342:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12516, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5342:48:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12517, "nodeType": "ExpressionStatement", "src": "5342:48:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12519, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12503, "src": "5415:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12520, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12505, "src": "5421:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12521, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12507, "src": "5425:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12518, "name": "_transferFrom", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12793, "src": "5401:13:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12522, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5401:32:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12523, "nodeType": "ExpressionStatement", "src": "5401:32:52" } ] }, "documentation": "@dev Transfers the ownership of a given token ID to another address\nUsage of this method is discouraged, use `safeTransferFrom` whenever possible\nRequires the msg sender to be the owner, approved, or operator\n@param from current owner of the token\n@param to address to receive the ownership of the given token ID\n@param tokenId uint256 ID of the token to be transferred", "id": 12525, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 12508, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12503, "name": "from", "nodeType": "VariableDeclaration", "scope": 12525, "src": "5282:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12502, "name": "address", "nodeType": "ElementaryTypeName", "src": "5282:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12505, "name": "to", "nodeType": "VariableDeclaration", "scope": 12525, "src": "5296:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12504, "name": "address", "nodeType": "ElementaryTypeName", "src": "5296:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12507, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12525, "src": "5308:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12506, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5308:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5281:43:52" }, "returnParameters": { "id": 12509, "nodeType": "ParameterList", "parameters": [], "src": "5332:0:52" }, "scope": 12857, "src": "5260:180:52", "stateMutability": "nonpayable", "superFunction": 12939, "visibility": "public" }, { "body": { "id": 12541, "nodeType": "Block", "src": "6155:56:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12535, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12527, "src": "6182:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12536, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12529, "src": "6188:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12537, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12531, "src": "6192:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "", "id": 12538, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6201:2:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" }, "value": "" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" } ], "id": 12534, "name": "safeTransferFrom", "nodeType": "Identifier", "overloadedDeclarations": [ 12542, 12569 ], "referencedDeclaration": 12569, "src": "6165:16:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,address,uint256,bytes memory)" } }, "id": 12539, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6165:39:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12540, "nodeType": "ExpressionStatement", "src": "6165:39:52" } ] }, "documentation": "@dev Safely transfers the ownership of a given token ID to another address\nIf the target address is a contract, it must implement `onERC721Received`,\nwhich is called upon a safe transfer, and return the magic value\n`bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`; otherwise,\nthe transfer is reverted.\n * Requires the msg sender to be the owner, approved, or operator\n@param from current owner of the token\n@param to address to receive the ownership of the given token ID\n@param tokenId uint256 ID of the token to be transferred", "id": 12542, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 12532, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12527, "name": "from", "nodeType": "VariableDeclaration", "scope": 12542, "src": "6105:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12526, "name": "address", "nodeType": "ElementaryTypeName", "src": "6105:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12529, "name": "to", "nodeType": "VariableDeclaration", "scope": 12542, "src": "6119:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12528, "name": "address", "nodeType": "ElementaryTypeName", "src": "6119:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12531, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12542, "src": "6131:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12530, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6131:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "6104:43:52" }, "returnParameters": { "id": 12533, "nodeType": "ParameterList", "parameters": [], "src": "6155:0:52" }, "scope": 12857, "src": "6079:132:52", "stateMutability": "nonpayable", "superFunction": 12948, "visibility": "public" }, { "body": { "id": 12568, "nodeType": "Block", "src": "7012:115:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12554, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12544, "src": "7035:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12555, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12546, "src": "7041:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12556, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12548, "src": "7045:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12553, "name": "transferFrom", "nodeType": "Identifier", "overloadedDeclarations": [ 12525 ], "referencedDeclaration": 12525, "src": "7022:12:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12557, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7022:31:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12558, "nodeType": "ExpressionStatement", "src": "7022:31:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12561, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12544, "src": "7094:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12562, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12546, "src": "7100:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12563, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12548, "src": "7104:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 12564, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12550, "src": "7113:5:52", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 12560, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12833, "src": "7071:22:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 12565, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7071:48:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12559, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "7063:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12566, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7063:57:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12567, "nodeType": "ExpressionStatement", "src": "7063:57:52" } ] }, "documentation": "@dev Safely transfers the ownership of a given token ID to another address\nIf the target address is a contract, it must implement `onERC721Received`,\nwhich is called upon a safe transfer, and return the magic value\n`bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`; otherwise,\nthe transfer is reverted.\nRequires the msg sender to be the owner, approved, or operator\n@param from current owner of the token\n@param to address to receive the ownership of the given token ID\n@param tokenId uint256 ID of the token to be transferred\n@param _data bytes data to send along with a safe transfer check", "id": 12569, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 12551, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12544, "name": "from", "nodeType": "VariableDeclaration", "scope": 12569, "src": "6942:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12543, "name": "address", "nodeType": "ElementaryTypeName", "src": "6942:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12546, "name": "to", "nodeType": "VariableDeclaration", "scope": 12569, "src": "6956:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12545, "name": "address", "nodeType": "ElementaryTypeName", "src": "6956:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12548, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12569, "src": "6968:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12547, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6968:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12550, "name": "_data", "nodeType": "VariableDeclaration", "scope": 12569, "src": "6985:18:52", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 12549, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "6985:5:52", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "6941:63:52" }, "returnParameters": { "id": 12552, "nodeType": "ParameterList", "parameters": [], "src": "7012:0:52" }, "scope": 12857, "src": "6916:211:52", "stateMutability": "nonpayable", "superFunction": 12959, "visibility": "public" }, { "body": { "id": 12588, "nodeType": "Block", "src": "7379:89:52", "statements": [ { "assignments": [ 12577 ], "declarations": [ { "constant": false, "id": 12577, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12588, "src": "7389:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12576, "name": "address", "nodeType": "ElementaryTypeName", "src": "7389:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 12581, "initialValue": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12578, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12322, "src": "7405:11:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12580, "indexExpression": { "argumentTypes": null, "id": 12579, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12571, "src": "7417:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7405:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7389:36:52" }, { "expression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12586, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12582, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12577, "src": "7442:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12584, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7459:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12583, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7451:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12585, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7451:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "7442:19:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 12575, "id": 12587, "nodeType": "Return", "src": "7435:26:52" } ] }, "documentation": "@dev Returns whether the specified token exists\n@param tokenId uint256 ID of the token to query the existence of\n@return whether the token exists", "id": 12589, "implemented": true, "kind": "function", "modifiers": [], "name": "_exists", "nodeType": "FunctionDefinition", "parameters": { "id": 12572, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12571, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12589, "src": "7333:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12570, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7333:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7332:17:52" }, "returnParameters": { "id": 12575, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12574, "name": "", "nodeType": "VariableDeclaration", "scope": 12589, "src": "7373:4:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12573, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7373:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "7372:6:52" }, "scope": 12857, "src": "7316:152:52", "stateMutability": "view", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12620, "nodeType": "Block", "src": "7922:155:52", "statements": [ { "assignments": [ 12599 ], "declarations": [ { "constant": false, "id": 12599, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12620, "src": "7932:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12598, "name": "address", "nodeType": "ElementaryTypeName", "src": "7932:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 12603, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12601, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12593, "src": "7956:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12600, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "7948:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12602, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7948:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7932:32:52" }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 12617, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 12612, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12606, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12604, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12591, "src": "7982:7:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12605, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12599, "src": "7993:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7982:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12611, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12608, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12593, "src": "8014:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12607, "name": "getApproved", "nodeType": "Identifier", "overloadedDeclarations": [ 12454 ], "referencedDeclaration": 12454, "src": "8002:11:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12609, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8002:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12610, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12591, "src": "8026:7:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8002:31:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7982:51:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12614, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12599, "src": "8054:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12615, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12591, "src": "8061:7:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 12613, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [ 12501 ], "referencedDeclaration": 12501, "src": "8037:16:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 12616, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8037:32:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7982:87:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 12618, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "7981:89:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 12597, "id": 12619, "nodeType": "Return", "src": "7974:96:52" } ] }, "documentation": "@dev Returns whether the given spender can transfer a given token ID\n@param spender address of the spender to query\n@param tokenId uint256 ID of the token to be transferred\n@return bool whether the msg.sender is approved for the given token ID,\n is an operator of the owner, or is the owner of the token", "id": 12621, "implemented": true, "kind": "function", "modifiers": [], "name": "_isApprovedOrOwner", "nodeType": "FunctionDefinition", "parameters": { "id": 12594, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12591, "name": "spender", "nodeType": "VariableDeclaration", "scope": 12621, "src": "7859:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12590, "name": "address", "nodeType": "ElementaryTypeName", "src": "7859:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12593, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12621, "src": "7876:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12592, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7876:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7858:34:52" }, "returnParameters": { "id": 12597, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12596, "name": "", "nodeType": "VariableDeclaration", "scope": 12621, "src": "7916:4:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12595, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7916:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "7915:6:52" }, "scope": 12857, "src": "7831:246:52", "stateMutability": "view", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12668, "nodeType": "Block", "src": "8373:225:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12633, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12629, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8391:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12631, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8405:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12630, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8397:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12632, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8397:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "8391:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12628, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "8383:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12634, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8383:25:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12635, "nodeType": "ExpressionStatement", "src": "8383:25:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12640, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "8426:17:52", "subExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12638, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12625, "src": "8435:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12637, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12589, "src": "8427:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 12639, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8427:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12636, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "8418:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12641, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8418:26:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12642, "nodeType": "ExpressionStatement", "src": "8418:26:52" }, { "expression": { "argumentTypes": null, "id": 12647, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12643, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12322, "src": "8455:11:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12645, "indexExpression": { "argumentTypes": null, "id": 12644, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12625, "src": "8467:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8455:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 12646, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8478:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8455:25:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12648, "nodeType": "ExpressionStatement", "src": "8455:25:52" }, { "expression": { "argumentTypes": null, "id": 12658, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12649, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "8490:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12651, "indexExpression": { "argumentTypes": null, "id": 12650, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8508:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8490:21:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "31", "id": 12656, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8540:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12652, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "8514:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12654, "indexExpression": { "argumentTypes": null, "id": 12653, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8532:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "8514:21:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12655, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 12168, "src": "8514:25:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 12657, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8514:28:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8490:52:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12659, "nodeType": "ExpressionStatement", "src": "8490:52:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12662, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8575:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12661, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8567:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12663, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8567:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12664, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8579:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12665, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12625, "src": "8583:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12660, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12870, "src": "8558:8:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12666, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8558:33:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12667, "nodeType": "EmitStatement", "src": "8553:38:52" } ] }, "documentation": "@dev Internal function to mint a new token\nReverts if the given token ID already exists\n@param to The address that will own the minted token\n@param tokenId uint256 ID of the token to be minted", "id": 12669, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nodeType": "FunctionDefinition", "parameters": { "id": 12626, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12623, "name": "to", "nodeType": "VariableDeclaration", "scope": 12669, "src": "8335:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12622, "name": "address", "nodeType": "ElementaryTypeName", "src": "8335:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12625, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12669, "src": "8347:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12624, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8347:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "8334:29:52" }, "returnParameters": { "id": 12627, "nodeType": "ParameterList", "parameters": [], "src": "8373:0:52" }, "scope": 12857, "src": "8320:278:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12715, "nodeType": "Block", "src": "8927:249:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12681, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12678, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12673, "src": "8953:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12677, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "8945:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12679, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8945:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12680, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12671, "src": "8965:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8945:25:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12676, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "8937:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12682, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8937:34:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12683, "nodeType": "ExpressionStatement", "src": "8937:34:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12685, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12673, "src": "8997:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12684, "name": "_clearApproval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12856, "src": "8982:14:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_uint256_$returns$__$", "typeString": "function (uint256)" } }, "id": 12686, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8982:23:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12687, "nodeType": "ExpressionStatement", "src": "8982:23:52" }, { "expression": { "argumentTypes": null, "id": 12697, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12688, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "9016:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12690, "indexExpression": { "argumentTypes": null, "id": 12689, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12671, "src": "9034:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9016:24:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "31", "id": 12695, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9072:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12691, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "9043:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12693, "indexExpression": { "argumentTypes": null, "id": 12692, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12671, "src": "9061:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9043:24:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12694, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 12144, "src": "9043:28:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 12696, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9043:31:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9016:58:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12698, "nodeType": "ExpressionStatement", "src": "9016:58:52" }, { "expression": { "argumentTypes": null, "id": 12705, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12699, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12322, "src": "9084:11:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12701, "indexExpression": { "argumentTypes": null, "id": 12700, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12673, "src": "9096:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9084:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12703, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9115:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12702, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9107:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12704, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9107:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "9084:33:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12706, "nodeType": "ExpressionStatement", "src": "9084:33:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12708, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12671, "src": "9142:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12710, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9157:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12709, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9149:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12711, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9149:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12712, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12673, "src": "9161:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12707, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12870, "src": "9133:8:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12713, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9133:36:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12714, "nodeType": "EmitStatement", "src": "9128:41:52" } ] }, "documentation": "@dev Internal function to burn a specific token\nReverts if the token does not exist\nDeprecated, use _burn(uint256) instead.\n@param owner owner of the token to burn\n@param tokenId uint256 ID of the token being burned", "id": 12716, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 12674, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12671, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12716, "src": "8886:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12670, "name": "address", "nodeType": "ElementaryTypeName", "src": "8886:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12673, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12716, "src": "8901:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12672, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8901:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "8885:32:52" }, "returnParameters": { "id": 12675, "nodeType": "ParameterList", "parameters": [], "src": "8927:0:52" }, "scope": 12857, "src": "8871:305:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12728, "nodeType": "Block", "src": "9396:49:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12723, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12718, "src": "9420:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12722, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "9412:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12724, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9412:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12725, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12718, "src": "9430:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12721, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [ 12716, 12729 ], "referencedDeclaration": 12716, "src": "9406:5:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 12726, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9406:32:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12727, "nodeType": "ExpressionStatement", "src": "9406:32:52" } ] }, "documentation": "@dev Internal function to burn a specific token\nReverts if the token does not exist\n@param tokenId uint256 ID of the token being burned", "id": 12729, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 12719, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12718, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12729, "src": "9370:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12717, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9370:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "9369:17:52" }, "returnParameters": { "id": 12720, "nodeType": "ParameterList", "parameters": [], "src": "9396:0:52" }, "scope": 12857, "src": "9355:90:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12792, "nodeType": "Block", "src": "9894:327:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12743, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12740, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12735, "src": "9920:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12739, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "9912:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12741, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9912:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12742, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12731, "src": "9932:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9912:24:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12738, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "9904:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12744, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9904:33:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12745, "nodeType": "ExpressionStatement", "src": "9904:33:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12751, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12747, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "9955:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12749, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9969:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12748, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9961:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12750, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9961:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "9955:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12746, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "9947:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12752, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9947:25:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12753, "nodeType": "ExpressionStatement", "src": "9947:25:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12755, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12735, "src": "9998:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12754, "name": "_clearApproval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12856, "src": "9983:14:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_uint256_$returns$__$", "typeString": "function (uint256)" } }, "id": 12756, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9983:23:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12757, "nodeType": "ExpressionStatement", "src": "9983:23:52" }, { "expression": { "argumentTypes": null, "id": 12767, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12758, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "10017:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12760, "indexExpression": { "argumentTypes": null, "id": 12759, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12731, "src": "10035:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10017:23:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "31", "id": 12765, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10071:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12761, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "10043:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12763, "indexExpression": { "argumentTypes": null, "id": 12762, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12731, "src": "10061:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10043:23:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12764, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 12144, "src": "10043:27:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 12766, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10043:30:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10017:56:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12768, "nodeType": "ExpressionStatement", "src": "10017:56:52" }, { "expression": { "argumentTypes": null, "id": 12778, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12769, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "10083:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12771, "indexExpression": { "argumentTypes": null, "id": 12770, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "10101:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10083:21:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "31", "id": 12776, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10133:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12772, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "10107:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12774, "indexExpression": { "argumentTypes": null, "id": 12773, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "10125:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10107:21:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12775, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 12168, "src": "10107:25:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 12777, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10107:28:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10083:52:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12779, "nodeType": "ExpressionStatement", "src": "10083:52:52" }, { "expression": { "argumentTypes": null, "id": 12784, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12780, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12322, "src": "10146:11:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12782, "indexExpression": { "argumentTypes": null, "id": 12781, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12735, "src": "10158:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10146:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 12783, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "10169:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10146:25:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12785, "nodeType": "ExpressionStatement", "src": "10146:25:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12787, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12731, "src": "10196:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12788, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "10202:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12789, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12735, "src": "10206:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12786, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12870, "src": "10187:8:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12790, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10187:27:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12791, "nodeType": "EmitStatement", "src": "10182:32:52" } ] }, "documentation": "@dev Internal function to transfer ownership of a given token ID to another address.\nAs opposed to transferFrom, this imposes no restrictions on msg.sender.\n@param from current owner of the token\n@param to address to receive the ownership of the given token ID\n@param tokenId uint256 ID of the token to be transferred", "id": 12793, "implemented": true, "kind": "function", "modifiers": [], "name": "_transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 12736, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12731, "name": "from", "nodeType": "VariableDeclaration", "scope": 12793, "src": "9842:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12730, "name": "address", "nodeType": "ElementaryTypeName", "src": "9842:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12733, "name": "to", "nodeType": "VariableDeclaration", "scope": 12793, "src": "9856:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12732, "name": "address", "nodeType": "ElementaryTypeName", "src": "9856:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12735, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12793, "src": "9868:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12734, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9868:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "9841:43:52" }, "returnParameters": { "id": 12737, "nodeType": "ParameterList", "parameters": [], "src": "9894:0:52" }, "scope": 12857, "src": "9819:402:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12832, "nodeType": "Block", "src": "10875:216:52", "statements": [ { "condition": { "argumentTypes": null, "id": 12809, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "10889:16:52", "subExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "expression": { "argumentTypes": null, "id": 12806, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12797, "src": "10890:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12807, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "isContract", "nodeType": "MemberAccess", "referencedDeclaration": 12994, "src": "10890:13:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$returns$_t_bool_$bound_to$_t_address_$", "typeString": "function (address) view returns (bool)" } }, "id": 12808, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10890:15:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 12813, "nodeType": "IfStatement", "src": "10885:58:52", "trueBody": { "id": 12812, "nodeType": "Block", "src": "10907:36:52", "statements": [ { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 12810, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "10928:4:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 12805, "id": 12811, "nodeType": "Return", "src": "10921:11:52" } ] } }, { "assignments": [ 12815 ], "declarations": [ { "constant": false, "id": 12815, "name": "retval", "nodeType": "VariableDeclaration", "scope": 12832, "src": "10953:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 12814, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "10953:6:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": null, "visibility": "internal" } ], "id": 12826, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12820, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "11006:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12821, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "11006:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12822, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12795, "src": "11018:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12823, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12799, "src": "11024:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 12824, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12801, "src": "11033:5:52", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12817, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12797, "src": "10985:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 12816, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12976, "src": "10969:15:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$12976_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 12818, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10969:19:52", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC721Receiver_$12976", "typeString": "contract IERC721Receiver" } }, "id": 12819, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 12975, "src": "10969:36:52", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bytes4_$", "typeString": "function (address,address,uint256,bytes memory) external returns (bytes4)" } }, "id": 12825, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10969:70:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "VariableDeclarationStatement", "src": "10953:86:52" }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "id": 12829, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12827, "name": "retval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12815, "src": "11057:6:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12828, "name": "_ERC721_RECEIVED", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12318, "src": "11067:16:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "src": "11057:26:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 12830, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "11056:28:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 12805, "id": 12831, "nodeType": "Return", "src": "11049:35:52" } ] }, "documentation": "@dev Internal function to invoke `onERC721Received` on a target address\nThe call is not executed if the target address is not a contract\n@param from address representing the previous owner of the given token ID\n@param to target address that will receive the tokens\n@param tokenId uint256 ID of the token to be transferred\n@param _data bytes optional data to send along with the call\n@return whether the call correctly returned the expected magic value", "id": 12833, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkOnERC721Received", "nodeType": "FunctionDefinition", "parameters": { "id": 12802, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12795, "name": "from", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10776:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12794, "name": "address", "nodeType": "ElementaryTypeName", "src": "10776:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12797, "name": "to", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10790:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12796, "name": "address", "nodeType": "ElementaryTypeName", "src": "10790:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12799, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10802:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12798, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10802:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12801, "name": "_data", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10819:18:52", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 12800, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "10819:5:52", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "10775:63:52" }, "returnParameters": { "id": 12805, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12804, "name": "", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10865:4:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12803, "name": "bool", "nodeType": "ElementaryTypeName", "src": "10865:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "10864:6:52" }, "scope": 12857, "src": "10744:347:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12855, "nodeType": "Block", "src": "11301:122:52", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12844, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12838, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12326, "src": "11315:15:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12840, "indexExpression": { "argumentTypes": null, "id": 12839, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12835, "src": "11331:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "11315:24:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12842, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11351:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12841, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11343:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12843, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11343:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "11315:38:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 12854, "nodeType": "IfStatement", "src": "11311:106:52", "trueBody": { "id": 12853, "nodeType": "Block", "src": "11355:62:52", "statements": [ { "expression": { "argumentTypes": null, "id": 12851, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12845, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12326, "src": "11369:15:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12847, "indexExpression": { "argumentTypes": null, "id": 12846, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12835, "src": "11385:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11369:24:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12849, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11404:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12848, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11396:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12850, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11396:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "11369:37:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12852, "nodeType": "ExpressionStatement", "src": "11369:37:52" } ] } } ] }, "documentation": "@dev Private function to clear current approval of a given token ID\n@param tokenId uint256 ID of the token to be transferred", "id": 12856, "implemented": true, "kind": "function", "modifiers": [], "name": "_clearApproval", "nodeType": "FunctionDefinition", "parameters": { "id": 12836, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12835, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12856, "src": "11276:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12834, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11276:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "11275:17:52" }, "returnParameters": { "id": 12837, "nodeType": "ParameterList", "parameters": [], "src": "11301:0:52" }, "scope": 12857, "src": "11252:171:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "private" } ], "scope": 12858, "src": "338:11087:52" } ], "src": "0:11426:52" }, "legacyAST": { "absolutePath": "openzeppelin-solidity/contracts/token/ERC721/ERC721.sol", "exportedSymbols": { "ERC721": [ 12857 ] }, "id": 12858, "nodeType": "SourceUnit", "nodes": [ { "id": 12300, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:52" }, { "absolutePath": "openzeppelin-solidity/contracts/token/ERC721/IERC721.sol", "file": "./IERC721.sol", "id": 12301, "nodeType": "ImportDirective", "scope": 12858, "sourceUnit": 12961, "src": "25:23:52", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol", "file": "./IERC721Receiver.sol", "id": 12302, "nodeType": "ImportDirective", "scope": 12858, "sourceUnit": 12977, "src": "49:31:52", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/math/SafeMath.sol", "file": "../../math/SafeMath.sol", "id": 12303, "nodeType": "ImportDirective", "scope": 12858, "sourceUnit": 12190, "src": "81:33:52", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/utils/Address.sol", "file": "../../utils/Address.sol", "id": 12304, "nodeType": "ImportDirective", "scope": 12858, "sourceUnit": 12996, "src": "115:33:52", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/introspection/ERC165.sol", 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"typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12400, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "3207:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12402, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3207:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "3191:32:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12407, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12405, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12393, "src": "3241:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "id": 12406, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12399, "src": "3247:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3241:11:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12404, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "3233:7:52", "typeDescriptions": { "typeIdentifier": 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"nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "3271:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12412, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3271:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12413, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12399, "src": "3285:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3271:19:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12416, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12399, "src": "3311:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12417, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "3318:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12418, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3318:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" } ], "id": 12415, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [ 12501 ], "referencedDeclaration": 12501, "src": "3294:16:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 12419, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3294:35:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "3271:58:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12410, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "3263:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12421, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3263:67:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12422, "nodeType": "ExpressionStatement", "src": "3263:67:52" }, { "expression": { "argumentTypes": null, "id": 12427, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12423, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12326, "src": "3341:15:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12425, "indexExpression": { "argumentTypes": null, "id": 12424, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12395, "src": "3357:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "3341:24:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 12426, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12393, "src": "3368:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3341:29:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12428, "nodeType": "ExpressionStatement", "src": "3341:29:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12430, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12399, "src": "3394:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12431, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12393, "src": "3401:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12432, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12395, "src": "3405:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12429, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12878, "src": "3385:8:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12433, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3385:28:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12434, "nodeType": "EmitStatement", "src": "3380:33:52" } ] }, "documentation": "@dev Approves another address to transfer the given token ID\nThe zero address indicates there is no approved address.\nThere can only be one approved address per token at a given time.\nCan only be called by the token owner or an approved operator.\n@param to address to be approved for the given token ID\n@param tokenId uint256 ID of the token to be approved", "id": 12436, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nodeType": "FunctionDefinition", "parameters": { "id": 12396, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12393, "name": "to", "nodeType": "VariableDeclaration", "scope": 12436, "src": "3145:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12392, "name": "address", "nodeType": "ElementaryTypeName", "src": "3145:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12395, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12436, "src": "3157:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12394, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3157:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3144:29:52" }, "returnParameters": { "id": 12397, "nodeType": "ParameterList", "parameters": [], "src": "3181:0:52" }, "scope": 12857, "src": "3128:292:52", "stateMutability": "nonpayable", "superFunction": 12907, "visibility": "public" }, { "body": { "id": 12453, "nodeType": "Block", "src": "3773:83:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12445, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12438, "src": "3799:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12444, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12589, "src": "3791:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 12446, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3791:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12443, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "3783:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12447, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3783:25:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12448, "nodeType": "ExpressionStatement", "src": "3783:25:52" }, { "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12449, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12326, "src": "3825:15:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12451, "indexExpression": { "argumentTypes": null, "id": 12450, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12438, "src": "3841:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3825:24:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 12442, "id": 12452, "nodeType": "Return", "src": "3818:31:52" } ] }, "documentation": "@dev Gets the approved address for a token ID, or zero if no address set\nReverts if the token ID does not exist.\n@param tokenId uint256 ID of the token to query the approval of\n@return address currently approved for the given token ID", "id": 12454, "implemented": true, "kind": "function", "modifiers": [], "name": "getApproved", "nodeType": "FunctionDefinition", "parameters": { "id": 12439, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12438, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12454, "src": "3726:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12437, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3726:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3725:17:52" }, "returnParameters": { "id": 12442, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12441, "name": "", "nodeType": "VariableDeclaration", "scope": 12454, "src": "3764:7:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12440, "name": "address", "nodeType": "ElementaryTypeName", "src": "3764:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "3763:9:52" }, "scope": 12857, "src": "3705:151:52", "stateMutability": "view", "superFunction": 12914, "visibility": "public" }, { "body": { "id": 12484, "nodeType": "Block", "src": "4209:152:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12465, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12462, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12456, "src": "4227:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12463, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "4233:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12464, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4233:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "4227:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12461, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "4219:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12466, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4219:25:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12467, "nodeType": "ExpressionStatement", "src": "4219:25:52" }, { "expression": { "argumentTypes": null, "id": 12475, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12468, "name": "_operatorApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12336, "src": "4254:18:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" } }, "id": 12472, "indexExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12469, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "4273:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12470, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4273:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4254:30:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 12473, "indexExpression": { "argumentTypes": null, "id": 12471, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12456, "src": "4285:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "4254:34:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 12474, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12458, "src": "4291:8:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "4254:45:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 12476, "nodeType": "ExpressionStatement", "src": "4254:45:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12478, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "4329:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12479, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4329:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12480, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12456, "src": "4341:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12481, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12458, "src": "4345:8:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12477, "name": "ApprovalForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12886, "src": "4314:14:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_bool_$returns$__$", "typeString": "function (address,address,bool)" } }, "id": 12482, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4314:40:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12483, "nodeType": "EmitStatement", "src": "4309:45:52" } ] }, "documentation": "@dev Sets or unsets the approval of a given operator\nAn operator is allowed to transfer all tokens of the sender on their behalf\n@param to operator address to set the approval\n@param approved representing the status of the approval to be set", "id": 12485, "implemented": true, "kind": "function", "modifiers": [], "name": "setApprovalForAll", "nodeType": "FunctionDefinition", "parameters": { "id": 12459, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12456, "name": "to", "nodeType": "VariableDeclaration", "scope": 12485, "src": "4175:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12455, "name": "address", "nodeType": "ElementaryTypeName", "src": "4175:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12458, "name": "approved", "nodeType": "VariableDeclaration", "scope": 12485, "src": "4187:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12457, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4187:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "4174:27:52" }, "returnParameters": { "id": 12460, "nodeType": "ParameterList", "parameters": [], "src": "4209:0:52" }, "scope": 12857, "src": "4148:213:52", "stateMutability": "nonpayable", "superFunction": 12921, "visibility": "public" }, { "body": { "id": 12500, "nodeType": "Block", "src": "4768:59:52", "statements": [ { "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12494, "name": "_operatorApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12336, "src": "4785:18:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" } }, "id": 12496, "indexExpression": { "argumentTypes": null, "id": 12495, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12487, "src": "4804:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4785:25:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 12498, "indexExpression": { "argumentTypes": null, "id": 12497, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12489, "src": "4811:8:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4785:35:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 12493, "id": 12499, "nodeType": "Return", "src": "4778:42:52" } ] }, "documentation": "@dev Tells whether an operator is approved by a given owner\n@param owner owner address which you want to query the approval of\n@param operator operator address which you want to query the approval of\n@return bool whether the given operator is approved by the given owner", "id": 12501, "implemented": true, "kind": "function", "modifiers": [], "name": "isApprovedForAll", "nodeType": "FunctionDefinition", "parameters": { "id": 12490, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12487, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12501, "src": "4708:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12486, "name": "address", "nodeType": "ElementaryTypeName", "src": "4708:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12489, "name": "operator", "nodeType": "VariableDeclaration", "scope": 12501, "src": "4723:16:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12488, "name": "address", "nodeType": "ElementaryTypeName", "src": "4723:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "4707:33:52" }, "returnParameters": { "id": 12493, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12492, "name": "", "nodeType": "VariableDeclaration", "scope": 12501, "src": "4762:4:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12491, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4762:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "4761:6:52" }, "scope": 12857, "src": "4682:145:52", "stateMutability": "view", "superFunction": 12930, "visibility": "public" }, { "body": { "id": 12524, "nodeType": "Block", "src": "5332:108:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12512, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "5369:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12513, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "5369:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12514, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12507, "src": "5381:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12511, "name": "_isApprovedOrOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12621, "src": "5350:18:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) view returns (bool)" } }, "id": 12515, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5350:39:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12510, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "5342:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12516, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5342:48:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12517, "nodeType": "ExpressionStatement", "src": "5342:48:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12519, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12503, "src": "5415:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12520, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12505, "src": "5421:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12521, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12507, "src": "5425:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12518, "name": "_transferFrom", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12793, "src": "5401:13:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12522, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5401:32:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12523, "nodeType": "ExpressionStatement", "src": "5401:32:52" } ] }, "documentation": "@dev Transfers the ownership of a given token ID to another address\nUsage of this method is discouraged, use `safeTransferFrom` whenever possible\nRequires the msg sender to be the owner, approved, or operator\n@param from current owner of the token\n@param to address to receive the ownership of the given token ID\n@param tokenId uint256 ID of the token to be transferred", "id": 12525, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 12508, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12503, "name": "from", "nodeType": "VariableDeclaration", "scope": 12525, "src": "5282:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12502, "name": "address", "nodeType": "ElementaryTypeName", "src": "5282:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12505, "name": "to", "nodeType": "VariableDeclaration", "scope": 12525, "src": "5296:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12504, "name": "address", "nodeType": "ElementaryTypeName", "src": "5296:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12507, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12525, "src": "5308:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12506, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5308:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5281:43:52" }, "returnParameters": { "id": 12509, "nodeType": "ParameterList", "parameters": [], "src": "5332:0:52" }, "scope": 12857, "src": "5260:180:52", "stateMutability": "nonpayable", "superFunction": 12939, "visibility": "public" }, { "body": { "id": 12541, "nodeType": "Block", "src": "6155:56:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12535, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12527, "src": "6182:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12536, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12529, "src": "6188:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12537, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12531, "src": "6192:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "", "id": 12538, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6201:2:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" }, "value": "" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" } ], "id": 12534, "name": "safeTransferFrom", "nodeType": "Identifier", "overloadedDeclarations": [ 12542, 12569 ], "referencedDeclaration": 12569, "src": "6165:16:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,address,uint256,bytes memory)" } }, "id": 12539, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6165:39:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12540, "nodeType": "ExpressionStatement", "src": "6165:39:52" } ] }, "documentation": "@dev Safely transfers the ownership of a given token ID to another address\nIf the target address is a contract, it must implement `onERC721Received`,\nwhich is called upon a safe transfer, and return the magic value\n`bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`; otherwise,\nthe transfer is reverted.\n * Requires the msg sender to be the owner, approved, or operator\n@param from current owner of the token\n@param to address to receive the ownership of the given token ID\n@param tokenId uint256 ID of the token to be transferred", "id": 12542, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 12532, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12527, "name": "from", "nodeType": "VariableDeclaration", "scope": 12542, "src": "6105:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12526, "name": "address", "nodeType": "ElementaryTypeName", "src": "6105:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12529, "name": "to", "nodeType": "VariableDeclaration", "scope": 12542, "src": "6119:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12528, "name": "address", "nodeType": "ElementaryTypeName", "src": "6119:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12531, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12542, "src": "6131:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12530, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6131:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "6104:43:52" }, "returnParameters": { "id": 12533, "nodeType": "ParameterList", "parameters": [], "src": "6155:0:52" }, "scope": 12857, "src": "6079:132:52", "stateMutability": "nonpayable", "superFunction": 12948, "visibility": "public" }, { "body": { "id": 12568, "nodeType": "Block", "src": "7012:115:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12554, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12544, "src": "7035:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12555, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12546, "src": "7041:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12556, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12548, "src": "7045:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12553, "name": "transferFrom", "nodeType": "Identifier", "overloadedDeclarations": [ 12525 ], "referencedDeclaration": 12525, "src": "7022:12:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12557, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7022:31:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12558, "nodeType": "ExpressionStatement", "src": "7022:31:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12561, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12544, "src": "7094:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12562, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12546, "src": "7100:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12563, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12548, "src": "7104:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 12564, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12550, "src": "7113:5:52", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 12560, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12833, "src": "7071:22:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 12565, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7071:48:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12559, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "7063:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12566, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7063:57:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12567, "nodeType": "ExpressionStatement", "src": "7063:57:52" } ] }, "documentation": "@dev Safely transfers the ownership of a given token ID to another address\nIf the target address is a contract, it must implement `onERC721Received`,\nwhich is called upon a safe transfer, and return the magic value\n`bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`; otherwise,\nthe transfer is reverted.\nRequires the msg sender to be the owner, approved, or operator\n@param from current owner of the token\n@param to address to receive the ownership of the given token ID\n@param tokenId uint256 ID of the token to be transferred\n@param _data bytes data to send along with a safe transfer check", "id": 12569, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 12551, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12544, "name": "from", "nodeType": "VariableDeclaration", "scope": 12569, "src": "6942:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12543, "name": "address", "nodeType": "ElementaryTypeName", "src": "6942:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12546, "name": "to", "nodeType": "VariableDeclaration", "scope": 12569, "src": "6956:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12545, "name": "address", "nodeType": "ElementaryTypeName", "src": "6956:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12548, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12569, "src": "6968:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12547, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6968:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12550, "name": "_data", "nodeType": "VariableDeclaration", "scope": 12569, "src": "6985:18:52", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 12549, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "6985:5:52", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "6941:63:52" }, "returnParameters": { "id": 12552, "nodeType": "ParameterList", "parameters": [], "src": "7012:0:52" }, "scope": 12857, "src": "6916:211:52", "stateMutability": "nonpayable", "superFunction": 12959, "visibility": "public" }, { "body": { "id": 12588, "nodeType": "Block", "src": "7379:89:52", "statements": [ { "assignments": [ 12577 ], "declarations": [ { "constant": false, "id": 12577, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12588, "src": "7389:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12576, "name": "address", "nodeType": "ElementaryTypeName", "src": "7389:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 12581, "initialValue": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12578, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12322, "src": "7405:11:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12580, "indexExpression": { "argumentTypes": null, "id": 12579, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12571, "src": "7417:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7405:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7389:36:52" }, { "expression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12586, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12582, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12577, "src": "7442:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12584, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7459:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12583, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7451:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12585, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7451:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "7442:19:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 12575, "id": 12587, "nodeType": "Return", "src": "7435:26:52" } ] }, "documentation": "@dev Returns whether the specified token exists\n@param tokenId uint256 ID of the token to query the existence of\n@return whether the token exists", "id": 12589, "implemented": true, "kind": "function", "modifiers": [], "name": "_exists", "nodeType": "FunctionDefinition", "parameters": { "id": 12572, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12571, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12589, "src": "7333:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12570, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7333:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7332:17:52" }, "returnParameters": { "id": 12575, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12574, "name": "", "nodeType": "VariableDeclaration", "scope": 12589, "src": "7373:4:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12573, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7373:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "7372:6:52" }, "scope": 12857, "src": "7316:152:52", "stateMutability": "view", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12620, "nodeType": "Block", "src": "7922:155:52", "statements": [ { "assignments": [ 12599 ], "declarations": [ { "constant": false, "id": 12599, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12620, "src": "7932:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12598, "name": "address", "nodeType": "ElementaryTypeName", "src": "7932:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 12603, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12601, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12593, "src": "7956:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12600, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "7948:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12602, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7948:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7932:32:52" }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 12617, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 12612, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12606, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12604, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12591, "src": "7982:7:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12605, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12599, "src": "7993:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7982:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12611, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12608, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12593, "src": "8014:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12607, "name": "getApproved", "nodeType": "Identifier", "overloadedDeclarations": [ 12454 ], "referencedDeclaration": 12454, "src": "8002:11:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12609, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8002:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12610, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12591, "src": "8026:7:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8002:31:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7982:51:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12614, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12599, "src": "8054:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12615, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12591, "src": "8061:7:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 12613, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [ 12501 ], "referencedDeclaration": 12501, "src": "8037:16:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 12616, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8037:32:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7982:87:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 12618, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "7981:89:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 12597, "id": 12619, "nodeType": "Return", "src": "7974:96:52" } ] }, "documentation": "@dev Returns whether the given spender can transfer a given token ID\n@param spender address of the spender to query\n@param tokenId uint256 ID of the token to be transferred\n@return bool whether the msg.sender is approved for the given token ID,\n is an operator of the owner, or is the owner of the token", "id": 12621, "implemented": true, "kind": "function", "modifiers": [], "name": "_isApprovedOrOwner", "nodeType": "FunctionDefinition", "parameters": { "id": 12594, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12591, "name": "spender", "nodeType": "VariableDeclaration", "scope": 12621, "src": "7859:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12590, "name": "address", "nodeType": "ElementaryTypeName", "src": "7859:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12593, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12621, "src": "7876:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12592, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7876:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7858:34:52" }, "returnParameters": { "id": 12597, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12596, "name": "", "nodeType": "VariableDeclaration", "scope": 12621, "src": "7916:4:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12595, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7916:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "7915:6:52" }, "scope": 12857, "src": "7831:246:52", "stateMutability": "view", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12668, "nodeType": "Block", "src": "8373:225:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12633, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12629, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8391:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12631, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8405:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12630, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8397:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12632, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8397:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "8391:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12628, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "8383:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12634, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8383:25:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12635, "nodeType": "ExpressionStatement", "src": "8383:25:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12640, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "8426:17:52", "subExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12638, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12625, "src": "8435:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12637, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12589, "src": "8427:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 12639, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8427:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12636, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "8418:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12641, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8418:26:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12642, "nodeType": "ExpressionStatement", "src": "8418:26:52" }, { "expression": { "argumentTypes": null, "id": 12647, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12643, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12322, "src": "8455:11:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12645, "indexExpression": { "argumentTypes": null, "id": 12644, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12625, "src": "8467:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8455:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 12646, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8478:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8455:25:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12648, "nodeType": "ExpressionStatement", "src": "8455:25:52" }, { "expression": { "argumentTypes": null, "id": 12658, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12649, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "8490:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12651, "indexExpression": { "argumentTypes": null, "id": 12650, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8508:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8490:21:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "31", "id": 12656, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8540:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12652, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "8514:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12654, "indexExpression": { "argumentTypes": null, "id": 12653, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8532:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "8514:21:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12655, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 12168, "src": "8514:25:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 12657, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8514:28:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8490:52:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12659, "nodeType": "ExpressionStatement", "src": "8490:52:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12662, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8575:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12661, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8567:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12663, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8567:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12664, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12623, "src": "8579:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12665, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12625, "src": "8583:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12660, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12870, "src": "8558:8:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12666, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8558:33:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12667, "nodeType": "EmitStatement", "src": "8553:38:52" } ] }, "documentation": "@dev Internal function to mint a new token\nReverts if the given token ID already exists\n@param to The address that will own the minted token\n@param tokenId uint256 ID of the token to be minted", "id": 12669, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nodeType": "FunctionDefinition", "parameters": { "id": 12626, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12623, "name": "to", "nodeType": "VariableDeclaration", "scope": 12669, "src": "8335:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12622, "name": "address", "nodeType": "ElementaryTypeName", "src": "8335:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12625, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12669, "src": "8347:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12624, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8347:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "8334:29:52" }, "returnParameters": { "id": 12627, "nodeType": "ParameterList", "parameters": [], "src": "8373:0:52" }, "scope": 12857, "src": "8320:278:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12715, "nodeType": "Block", "src": "8927:249:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12681, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12678, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12673, "src": "8953:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12677, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "8945:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12679, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8945:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12680, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12671, "src": "8965:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8945:25:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12676, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "8937:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12682, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8937:34:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12683, "nodeType": "ExpressionStatement", "src": "8937:34:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12685, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12673, "src": "8997:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12684, "name": "_clearApproval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12856, "src": "8982:14:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_uint256_$returns$__$", "typeString": "function (uint256)" } }, "id": 12686, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8982:23:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12687, "nodeType": "ExpressionStatement", "src": "8982:23:52" }, { "expression": { "argumentTypes": null, "id": 12697, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12688, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "9016:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12690, "indexExpression": { "argumentTypes": null, "id": 12689, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12671, "src": "9034:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9016:24:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "31", "id": 12695, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9072:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12691, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "9043:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12693, "indexExpression": { "argumentTypes": null, "id": 12692, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12671, "src": "9061:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9043:24:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12694, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 12144, "src": "9043:28:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 12696, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9043:31:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9016:58:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12698, "nodeType": "ExpressionStatement", "src": "9016:58:52" }, { "expression": { "argumentTypes": null, "id": 12705, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12699, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12322, "src": "9084:11:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12701, "indexExpression": { "argumentTypes": null, "id": 12700, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12673, "src": "9096:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9084:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12703, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9115:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12702, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9107:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12704, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9107:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "9084:33:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12706, "nodeType": "ExpressionStatement", "src": "9084:33:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12708, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12671, "src": "9142:5:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12710, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9157:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12709, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9149:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12711, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9149:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12712, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12673, "src": "9161:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12707, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12870, "src": "9133:8:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12713, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9133:36:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12714, "nodeType": "EmitStatement", "src": "9128:41:52" } ] }, "documentation": "@dev Internal function to burn a specific token\nReverts if the token does not exist\nDeprecated, use _burn(uint256) instead.\n@param owner owner of the token to burn\n@param tokenId uint256 ID of the token being burned", "id": 12716, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 12674, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12671, "name": "owner", "nodeType": "VariableDeclaration", "scope": 12716, "src": "8886:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12670, "name": "address", "nodeType": "ElementaryTypeName", "src": "8886:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12673, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12716, "src": "8901:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12672, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8901:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "8885:32:52" }, "returnParameters": { "id": 12675, "nodeType": "ParameterList", "parameters": [], "src": "8927:0:52" }, "scope": 12857, "src": "8871:305:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12728, "nodeType": "Block", "src": "9396:49:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12723, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12718, "src": "9420:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12722, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "9412:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12724, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9412:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12725, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12718, "src": "9430:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12721, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [ 12716, 12729 ], "referencedDeclaration": 12716, "src": "9406:5:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 12726, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9406:32:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12727, "nodeType": "ExpressionStatement", "src": "9406:32:52" } ] }, "documentation": "@dev Internal function to burn a specific token\nReverts if the token does not exist\n@param tokenId uint256 ID of the token being burned", "id": 12729, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 12719, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12718, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12729, "src": "9370:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12717, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9370:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "9369:17:52" }, "returnParameters": { "id": 12720, "nodeType": "ParameterList", "parameters": [], "src": "9396:0:52" }, "scope": 12857, "src": "9355:90:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12792, "nodeType": "Block", "src": "9894:327:52", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12743, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12740, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12735, "src": "9920:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12739, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 12391 ], "referencedDeclaration": 12391, "src": "9912:7:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 12741, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9912:16:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12742, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12731, "src": "9932:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9912:24:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12738, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "9904:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12744, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9904:33:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12745, "nodeType": "ExpressionStatement", "src": "9904:33:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12751, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12747, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "9955:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12749, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9969:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12748, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9961:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12750, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9961:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "9955:16:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 12746, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 13013, 13014 ], "referencedDeclaration": 13013, "src": "9947:7:52", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 12752, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9947:25:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12753, "nodeType": "ExpressionStatement", "src": "9947:25:52" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12755, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12735, "src": "9998:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12754, "name": "_clearApproval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12856, "src": "9983:14:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_uint256_$returns$__$", "typeString": "function (uint256)" } }, "id": 12756, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9983:23:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12757, "nodeType": "ExpressionStatement", "src": "9983:23:52" }, { "expression": { "argumentTypes": null, "id": 12767, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12758, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "10017:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12760, "indexExpression": { "argumentTypes": null, "id": 12759, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12731, "src": "10035:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10017:23:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "31", "id": 12765, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10071:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12761, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "10043:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12763, "indexExpression": { "argumentTypes": null, "id": 12762, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12731, "src": "10061:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10043:23:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12764, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 12144, "src": "10043:27:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 12766, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10043:30:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10017:56:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12768, "nodeType": "ExpressionStatement", "src": "10017:56:52" }, { "expression": { "argumentTypes": null, "id": 12778, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12769, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "10083:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12771, "indexExpression": { "argumentTypes": null, "id": 12770, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "10101:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10083:21:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "31", "id": 12776, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10133:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12772, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12330, "src": "10107:17:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 12774, "indexExpression": { "argumentTypes": null, "id": 12773, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "10125:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10107:21:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12775, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 12168, "src": "10107:25:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 12777, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10107:28:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10083:52:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 12779, "nodeType": "ExpressionStatement", "src": "10083:52:52" }, { "expression": { "argumentTypes": null, "id": 12784, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12780, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12322, "src": "10146:11:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12782, "indexExpression": { "argumentTypes": null, "id": 12781, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12735, "src": "10158:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10146:20:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 12783, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "10169:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10146:25:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12785, "nodeType": "ExpressionStatement", "src": "10146:25:52" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12787, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12731, "src": "10196:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12788, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12733, "src": "10202:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12789, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12735, "src": "10206:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 12786, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12870, "src": "10187:8:52", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 12790, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10187:27:52", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 12791, "nodeType": "EmitStatement", "src": "10182:32:52" } ] }, "documentation": "@dev Internal function to transfer ownership of a given token ID to another address.\nAs opposed to transferFrom, this imposes no restrictions on msg.sender.\n@param from current owner of the token\n@param to address to receive the ownership of the given token ID\n@param tokenId uint256 ID of the token to be transferred", "id": 12793, "implemented": true, "kind": "function", "modifiers": [], "name": "_transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 12736, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12731, "name": "from", "nodeType": "VariableDeclaration", "scope": 12793, "src": "9842:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12730, "name": "address", "nodeType": "ElementaryTypeName", "src": "9842:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12733, "name": "to", "nodeType": "VariableDeclaration", "scope": 12793, "src": "9856:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12732, "name": "address", "nodeType": "ElementaryTypeName", "src": "9856:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12735, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12793, "src": "9868:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12734, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9868:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "9841:43:52" }, "returnParameters": { "id": 12737, "nodeType": "ParameterList", "parameters": [], "src": "9894:0:52" }, "scope": 12857, "src": "9819:402:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12832, "nodeType": "Block", "src": "10875:216:52", "statements": [ { "condition": { "argumentTypes": null, "id": 12809, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "10889:16:52", "subExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "expression": { "argumentTypes": null, "id": 12806, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12797, "src": "10890:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12807, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "isContract", "nodeType": "MemberAccess", "referencedDeclaration": 12994, "src": "10890:13:52", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$returns$_t_bool_$bound_to$_t_address_$", "typeString": "function (address) view returns (bool)" } }, "id": 12808, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10890:15:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 12813, "nodeType": "IfStatement", "src": "10885:58:52", "trueBody": { "id": 12812, "nodeType": "Block", "src": "10907:36:52", "statements": [ { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 12810, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "10928:4:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 12805, "id": 12811, "nodeType": "Return", "src": "10921:11:52" } ] } }, { "assignments": [ 12815 ], "declarations": [ { "constant": false, "id": 12815, "name": "retval", "nodeType": "VariableDeclaration", "scope": 12832, "src": "10953:13:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 12814, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "10953:6:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": null, "visibility": "internal" } ], "id": 12826, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 12820, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13010, "src": "11006:3:52", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 12821, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "11006:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 12822, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12795, "src": "11018:4:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 12823, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12799, "src": "11024:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 12824, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12801, "src": "11033:5:52", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 12817, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12797, "src": "10985:2:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 12816, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12976, "src": "10969:15:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$12976_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 12818, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10969:19:52", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC721Receiver_$12976", "typeString": "contract IERC721Receiver" } }, "id": 12819, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 12975, "src": "10969:36:52", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bytes4_$", "typeString": "function (address,address,uint256,bytes memory) external returns (bytes4)" } }, "id": 12825, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10969:70:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "VariableDeclarationStatement", "src": "10953:86:52" }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "id": 12829, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 12827, "name": "retval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12815, "src": "11057:6:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 12828, "name": "_ERC721_RECEIVED", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12318, "src": "11067:16:52", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "src": "11057:26:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 12830, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "11056:28:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 12805, "id": 12831, "nodeType": "Return", "src": "11049:35:52" } ] }, "documentation": "@dev Internal function to invoke `onERC721Received` on a target address\nThe call is not executed if the target address is not a contract\n@param from address representing the previous owner of the given token ID\n@param to target address that will receive the tokens\n@param tokenId uint256 ID of the token to be transferred\n@param _data bytes optional data to send along with the call\n@return whether the call correctly returned the expected magic value", "id": 12833, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkOnERC721Received", "nodeType": "FunctionDefinition", "parameters": { "id": 12802, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12795, "name": "from", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10776:12:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12794, "name": "address", "nodeType": "ElementaryTypeName", "src": "10776:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12797, "name": "to", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10790:10:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 12796, "name": "address", "nodeType": "ElementaryTypeName", "src": "10790:7:52", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12799, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10802:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12798, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10802:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 12801, "name": "_data", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10819:18:52", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 12800, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "10819:5:52", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "10775:63:52" }, "returnParameters": { "id": 12805, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12804, "name": "", "nodeType": "VariableDeclaration", "scope": 12833, "src": "10865:4:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 12803, "name": "bool", "nodeType": "ElementaryTypeName", "src": "10865:4:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "10864:6:52" }, "scope": 12857, "src": "10744:347:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 12855, "nodeType": "Block", "src": "11301:122:52", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 12844, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12838, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12326, "src": "11315:15:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12840, "indexExpression": { "argumentTypes": null, "id": 12839, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12835, "src": "11331:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "11315:24:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12842, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11351:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12841, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11343:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12843, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11343:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "11315:38:52", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 12854, "nodeType": "IfStatement", "src": "11311:106:52", "trueBody": { "id": 12853, "nodeType": "Block", "src": "11355:62:52", "statements": [ { "expression": { "argumentTypes": null, "id": 12851, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 12845, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12326, "src": "11369:15:52", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 12847, "indexExpression": { "argumentTypes": null, "id": 12846, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 12835, "src": "11385:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11369:24:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 12849, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11404:1:52", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 12848, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11396:7:52", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 12850, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11396:10:52", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "11369:37:52", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 12852, "nodeType": "ExpressionStatement", "src": "11369:37:52" } ] } } ] }, "documentation": "@dev Private function to clear current approval of a given token ID\n@param tokenId uint256 ID of the token to be transferred", "id": 12856, "implemented": true, "kind": "function", "modifiers": [], "name": "_clearApproval", "nodeType": "FunctionDefinition", "parameters": { "id": 12836, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 12835, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 12856, "src": "11276:15:52", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 12834, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11276:7:52", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "11275:17:52" }, "returnParameters": { "id": 12837, "nodeType": "ParameterList", "parameters": [], "src": "11301:0:52" }, "scope": 12857, "src": "11252:171:52", "stateMutability": "nonpayable", "superFunction": null, "visibility": "private" } ], "scope": 12858, "src": "338:11087:52" } ], "src": "0:11426:52" }, "compiler": { "name": "solc", "version": "0.5.16+commit.9c3226ce.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.2.0", "updatedAt": "2020-06-17T12:57:45.007Z", "devdoc": { "details": "see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md", "methods": { "approve(address,uint256)": { "details": "Approves another address to transfer the given token ID The zero address indicates there is no approved address. There can only be one approved address per token at a given time. Can only be called by the token owner or an approved operator.", "params": { "to": "address to be approved for the given token ID", "tokenId": "uint256 ID of the token to be approved" } }, "balanceOf(address)": { "details": "Gets the balance of the specified address", "params": { "owner": "address to query the balance of" }, "return": "uint256 representing the amount owned by the passed address" }, "getApproved(uint256)": { "details": "Gets the approved address for a token ID, or zero if no address set Reverts if the token ID does not exist.", "params": { "tokenId": "uint256 ID of the token to query the approval of" }, "return": "address currently approved for the given token ID" }, "isApprovedForAll(address,address)": { "details": "Tells whether an operator is approved by a given owner", "params": { "operator": "operator address which you want to query the approval of", "owner": "owner address which you want to query the approval of" }, "return": "bool whether the given operator is approved by the given owner" }, "ownerOf(uint256)": { "details": "Gets the owner of the specified token ID", "params": { "tokenId": "uint256 ID of the token to query the owner of" }, "return": "owner address currently marked as the owner of the given token ID" }, "safeTransferFrom(address,address,uint256)": { "details": "Safely transfers the ownership of a given token ID to another address If the target address is a contract, it must implement `onERC721Received`, which is called upon a safe transfer, and return the magic value `bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`; otherwise, the transfer is reverted. * Requires the msg sender to be the owner, approved, or operator", "params": { "from": "current owner of the token", "to": "address to receive the ownership of the given token ID", "tokenId": "uint256 ID of the token to be transferred" } }, "safeTransferFrom(address,address,uint256,bytes)": { "details": "Safely transfers the ownership of a given token ID to another address If the target address is a contract, it must implement `onERC721Received`, which is called upon a safe transfer, and return the magic value `bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`; otherwise, the transfer is reverted. Requires the msg sender to be the owner, approved, or operator", "params": { "_data": "bytes data to send along with a safe transfer check", "from": "current owner of the token", "to": "address to receive the ownership of the given token ID", "tokenId": "uint256 ID of the token to be transferred" } }, "setApprovalForAll(address,bool)": { "details": "Sets or unsets the approval of a given operator An operator is allowed to transfer all tokens of the sender on their behalf", "params": { "approved": "representing the status of the approval to be set", "to": "operator address to set the approval" } }, "supportsInterface(bytes4)": { "details": "implement supportsInterface(bytes4) using a lookup table" }, "transferFrom(address,address,uint256)": { "details": "Transfers the ownership of a given token ID to another address Usage of this method is discouraged, use `safeTransferFrom` whenever possible Requires the msg sender to be the owner, approved, or operator", "params": { "from": "current owner of the token", "to": "address to receive the ownership of the given token ID", "tokenId": "uint256 ID of the token to be transferred" } } }, "title": "ERC721 Non-Fungible Token Standard basic implementation" }, "userdoc": { "methods": {} } }