{ "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\":\"0.5.17+commit.d19bba13\"},\"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://eips.ethereum.org/EIPS/eip-721\",\"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\":\"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\":\"See `IERC165.supportsInterface`. * Time complexity O(1), guaranteed to always use less than 30 000 gas.\"},\"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\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"openzeppelin-solidity/contracts/drafts/Counters.sol\":{\"keccak256\":\"0x5eb69360d3441ab2ee799bd7c007cccbffb0896f12b2dfe1456193e2aa180a11\",\"urls\":[\"bzz-raw://072e8b5a1b5acfc2acba9b6fb87d1dc57065aad44572617ad46b014074969eb3\",\"dweb:/ipfs/QmVTDHUriaxBJqiWCWgWC8vYaYYfXSz883LsowzTx1DcpK\"]},\"openzeppelin-solidity/contracts/introspection/ERC165.sol\":{\"keccak256\":\"0xac2eacd7e7762e275442f28f21d821544df5aae2ed7698af13be8c41b7005e2e\",\"urls\":[\"bzz-raw://8bdbefb642e7b08535c66bbf074e576cfef2300cdf910c1e0b211f6393833a28\",\"dweb:/ipfs/QmQhfx2Ufr8a2gFXm3KogL66xGgAuAWMwcamkWFKGG6Vya\"]},\"openzeppelin-solidity/contracts/introspection/IERC165.sol\":{\"keccak256\":\"0x661553e43d7c4fbb2de504e5999fd5c104d367488350ed5bf023031bd1ba5ac5\",\"urls\":[\"bzz-raw://b40442c5b350b57b88a081a1eacd2bac962d4ecc1f029f5447a18986f08f6f14\",\"dweb:/ipfs/QmV7wjtRf11ibUHh4g8JjuhMpy68pPhV95L2y46UBoRfsZ\"]},\"openzeppelin-solidity/contracts/math/SafeMath.sol\":{\"keccak256\":\"0x4ccf2d7b51873db1ccfd54ca2adae5eac3b184f9699911ed4490438419f1c690\",\"urls\":[\"bzz-raw://d62d769b2219d5de39013093412623e624fa887f871826ea3bae6052ee893610\",\"dweb:/ipfs/QmV3yVktya1s617QmuzQR2CfuJgUi3dR2xEZY9ecmqZ2G1\"]},\"openzeppelin-solidity/contracts/token/ERC721/ERC721.sol\":{\"keccak256\":\"0xf151df411bbf4eaef1fc8e8480cd10c2cd985f1a36517e63981517610213efc1\",\"urls\":[\"bzz-raw://2a277b3cc3a1a03af5c039bc75cd16bb2d23b529cb2564cc0bea1b1e0eb4dd68\",\"dweb:/ipfs/QmNRxggY8qmjjuLnxggRqE8uBueuCktLwi9YYHagWoaEJ8\"]},\"openzeppelin-solidity/contracts/token/ERC721/IERC721.sol\":{\"keccak256\":\"0xce48937a8007c580b8e2e35705738c922dd17540de89ebee6df06d2917a3f9fc\",\"urls\":[\"bzz-raw://1d117265103ee3efcd454d3aafb3e79a115f9bca6dec78a1229558eb30d14d05\",\"dweb:/ipfs/QmTm5Z1c7zzPiG3Cfj1eBMB23AeiEFGgvmTFQVaeEWXVCw\"]},\"openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol\":{\"keccak256\":\"0xadbfb7028fb0f851dc848a48b9e54e7c89ffd2c2edc12fa4ba9bb383dfaa83d9\",\"urls\":[\"bzz-raw://90dceab42713246639100b87d6650037d68e4a2ab2dd4b5768c3ed35d6b3a4a0\",\"dweb:/ipfs/QmQ42UW5nchMoYP9bU9F1AJga5chG8j92fCPkURpiDKsCu\"]},\"openzeppelin-solidity/contracts/utils/Address.sol\":{\"keccak256\":\"0xf3358e5819ca73357abd6c90bdfffd0474af54364897f6b3e3234c4b71fbe9a1\",\"urls\":[\"bzz-raw://75ae8d04454d1511a2ed986cc8585736f05c5c25280683b3d24712a9f414a4bf\",\"dweb:/ipfs/Qmb3kNCoBUZdah1AgBBD4zMk898j5Qw8ahT1w5cCMYp5Y3\"]}},\"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 \"../../drafts/Counters.sol\";\nimport \"../../introspection/ERC165.sol\";\n\n/**\n * @title ERC721 Non-Fungible Token Standard basic implementation\n * @dev see https://eips.ethereum.org/EIPS/eip-721\n */\ncontract ERC721 is ERC165, IERC721 {\n using SafeMath for uint256;\n using Address for address;\n using Counters for Counters.Counter;\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 => Counters.Counter) private _ownedTokensCount;\n\n // Mapping from owner to operator approvals\n mapping (address => mapping (address => bool)) private _operatorApprovals;\n\n /*\n * bytes4(keccak256('balanceOf(address)')) == 0x70a08231\n * bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e\n * bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3\n * bytes4(keccak256('getApproved(uint256)')) == 0x081812fc\n * bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465\n * bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c\n * bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd\n * bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e\n * bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde\n *\n * => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^\n * 0xa22cb465 ^ 0xe985e9c ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd\n */\n bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;\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), \"ERC721: balance query for the zero address\");\n\n return _ownedTokensCount[owner].current();\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 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), \"ERC721: owner query for nonexistent token\");\n\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, \"ERC721: approval to current owner\");\n\n require(msg.sender == owner || isApprovedForAll(owner, msg.sender),\n \"ERC721: approve caller is not owner nor approved for all\"\n );\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), \"ERC721: approved query for nonexistent token\");\n\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, \"ERC721: approve to caller\");\n\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 //solhint-disable-next-line max-line-length\n require(_isApprovedOrOwner(msg.sender, tokenId), \"ERC721: transfer caller is not owner nor approved\");\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 * 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), \"ERC721: transfer to non ERC721Receiver implementer\");\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 bool 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 require(_exists(tokenId), \"ERC721: operator query for nonexistent token\");\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), \"ERC721: mint to the zero address\");\n require(!_exists(tokenId), \"ERC721: token already minted\");\n\n _tokenOwner[tokenId] = to;\n _ownedTokensCount[to].increment();\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, \"ERC721: burn of token that is not own\");\n\n _clearApproval(tokenId);\n\n _ownedTokensCount[owner].decrement();\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, \"ERC721: transfer of token that is not own\");\n require(to != address(0), \"ERC721: transfer to the zero address\");\n\n _clearApproval(tokenId);\n\n _ownedTokensCount[from].decrement();\n _ownedTokensCount[to].increment();\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 *\n * This function is deprecated.\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 bool 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": [ 18055 ] }, "id": 18056, "nodeType": "SourceUnit", "nodes": [ { "id": 17492, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:65" }, { "absolutePath": "openzeppelin-solidity/contracts/token/ERC721/IERC721.sol", "file": "./IERC721.sol", "id": 17493, "nodeType": "ImportDirective", "scope": 18056, "sourceUnit": 18288, "src": "25:23:65", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol", "file": "./IERC721Receiver.sol", "id": 17494, "nodeType": "ImportDirective", "scope": 18056, "sourceUnit": 18327, "src": "49:31:65", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/math/SafeMath.sol", "file": "../../math/SafeMath.sol", "id": 17495, "nodeType": "ImportDirective", "scope": 18056, "sourceUnit": 16856, "src": "81:33:65", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/utils/Address.sol", "file": "../../utils/Address.sol", "id": 17496, "nodeType": "ImportDirective", "scope": 18056, "sourceUnit": 18346, "src": "115:33:65", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/drafts/Counters.sol", "file": "../../drafts/Counters.sol", "id": 17497, "nodeType": "ImportDirective", "scope": 18056, "sourceUnit": 16661, "src": "149:35:65", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/introspection/ERC165.sol", "file": "../../introspection/ERC165.sol", "id": 17498, "nodeType": "ImportDirective", "scope": 18056, "sourceUnit": 16713, "src": "185:40:65", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 17499, "name": "ERC165", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 16712, "src": "371:6:65", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC165_$16712", "typeString": "contract ERC165" } }, "id": 17500, "nodeType": "InheritanceSpecifier", "src": "371:6:65" }, { "arguments": null, "baseName": { "contractScope": null, "id": 17501, "name": "IERC721", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 18287, "src": "379:7:65", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC721_$18287", "typeString": "contract IERC721" } }, "id": 17502, "nodeType": "InheritanceSpecifier", "src": "379:7:65" } ], "contractDependencies": [ 16712, 16722, 18287 ], "contractKind": "contract", "documentation": "@title ERC721 Non-Fungible Token Standard basic implementation\n@dev see https://eips.ethereum.org/EIPS/eip-721", "fullyImplemented": true, "id": 18055, "linearizedBaseContracts": [ 18055, 18287, 16712, 16722 ], "name": "ERC721", "nodeType": "ContractDefinition", "nodes": [ { "id": 17505, "libraryName": { "contractScope": null, "id": 17503, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 16855, "src": "399:8:65", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$16855", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "393:27:65", "typeName": { "id": 17504, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "412:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "id": 17508, "libraryName": { "contractScope": null, "id": 17506, "name": "Address", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 18345, "src": "431:7:65", "typeDescriptions": { "typeIdentifier": "t_contract$_Address_$18345", "typeString": "library Address" } }, "nodeType": "UsingForDirective", "src": "425:26:65", "typeName": { "id": 17507, "name": "address", "nodeType": "ElementaryTypeName", "src": "443:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, { "id": 17511, "libraryName": { "contractScope": null, "id": 17509, "name": "Counters", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 16660, "src": "462:8:65", "typeDescriptions": { "typeIdentifier": "t_contract$_Counters_$16660", "typeString": "library Counters" } }, "nodeType": "UsingForDirective", "src": "456:36:65", "typeName": { "contractScope": null, "id": 17510, "name": "Counters.Counter", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 16620, "src": "475:16:65", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$16620_storage_ptr", "typeString": "struct Counters.Counter" } } }, { "constant": true, "id": 17514, "name": "_ERC721_RECEIVED", "nodeType": "VariableDeclaration", "scope": 18055, "src": "670:53:65", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 17512, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "670:6:65", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, "hexValue": "30783135306237613032", "id": 17513, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "713:10:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_353073666_by_1", "typeString": "int_const 353073666" }, "value": "0x150b7a02" }, "visibility": "private" }, { "constant": false, "id": 17518, "name": "_tokenOwner", "nodeType": "VariableDeclaration", "scope": 18055, "src": "768:48:65", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "typeName": { "id": 17517, "keyType": { "id": 17515, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "777:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Mapping", "src": "768:28:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "valueType": { "id": 17516, "name": "address", "nodeType": "ElementaryTypeName", "src": "788:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "value": null, "visibility": "private" }, { "constant": false, "id": 17522, "name": "_tokenApprovals", "nodeType": "VariableDeclaration", "scope": 18055, "src": "872:52:65", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "typeName": { "id": 17521, "keyType": { "id": 17519, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "881:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Mapping", "src": "872:28:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "valueType": { "id": 17520, "name": "address", "nodeType": "ElementaryTypeName", "src": "892:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "value": null, "visibility": "private" }, { "constant": false, "id": 17526, "name": "_ownedTokensCount", "nodeType": "VariableDeclaration", "scope": 18055, "src": "982:63:65", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_Counter_$16620_storage_$", "typeString": "mapping(address => struct Counters.Counter)" }, "typeName": { "id": 17525, "keyType": { "id": 17523, "name": "address", "nodeType": "ElementaryTypeName", "src": "991:7:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "982:37:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_Counter_$16620_storage_$", "typeString": "mapping(address => struct Counters.Counter)" }, "valueType": { "contractScope": null, "id": 17524, "name": "Counters.Counter", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 16620, "src": "1002:16:65", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$16620_storage_ptr", "typeString": "struct Counters.Counter" } } }, "value": null, "visibility": "private" }, { "constant": false, "id": 17532, "name": "_operatorApprovals", "nodeType": "VariableDeclaration", "scope": 18055, "src": "1100:73:65", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" }, "typeName": { "id": 17531, "keyType": { "id": 17527, "name": "address", "nodeType": "ElementaryTypeName", "src": "1109:7:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1100:46:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" }, "valueType": { "id": 17530, "keyType": { "id": 17528, "name": "address", "nodeType": "ElementaryTypeName", "src": "1129:7:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1120:25:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" }, "valueType": { "id": 17529, "name": "bool", "nodeType": "ElementaryTypeName", "src": "1140:4:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } } }, "value": null, "visibility": "private" }, { "constant": true, "id": 17535, "name": "_INTERFACE_ID_ERC721", "nodeType": "VariableDeclaration", "scope": 18055, "src": "2047:57:65", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 17533, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "2047:6:65", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, "hexValue": "30783830616335386364", "id": 17534, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2094:10:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_2158778573_by_1", "typeString": "int_const 2158778573" }, "value": "0x80ac58cd" }, "visibility": "private" }, { "body": { "id": 17542, "nodeType": "Block", "src": "2133:134:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17539, "name": "_INTERFACE_ID_ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17535, "src": "2239:20:65", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } ], "id": 17538, "name": "_registerInterface", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16711, "src": "2220:18:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_bytes4_$returns$__$", "typeString": "function (bytes4)" } }, "id": 17540, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2220:40:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17541, "nodeType": "ExpressionStatement", "src": "2220:40:65" } ] }, "documentation": null, "id": 17543, "implemented": true, "kind": "constructor", "modifiers": [], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 17536, "nodeType": "ParameterList", "parameters": [], "src": "2123:2:65" }, "returnParameters": { "id": 17537, "nodeType": "ParameterList", "parameters": [], "src": "2133:0:65" }, "scope": 18055, "src": "2111:156:65", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 17565, "nodeType": "Block", "src": "2535:143:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17555, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 17551, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17545, "src": "2553:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 17553, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2570:1:65", "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": 17552, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2562:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 17554, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2562:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "2553:19:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a2062616c616e636520717565727920666f7220746865207a65726f2061646472657373", "id": 17556, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2574:44:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_7395d4d3901c50cdfcab223d072f9aa36241df5d883e62cbf147ee1b05a9e6ba", "typeString": "literal_string \"ERC721: balance query for the zero address\"" }, "value": "ERC721: balance query for the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_7395d4d3901c50cdfcab223d072f9aa36241df5d883e62cbf147ee1b05a9e6ba", "typeString": "literal_string \"ERC721: balance query for the zero address\"" } ], "id": 17550, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "2545:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17557, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2545:74:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17558, "nodeType": "ExpressionStatement", "src": "2545:74:65" }, { "expression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17559, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17526, "src": "2637:17:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_Counter_$16620_storage_$", "typeString": "mapping(address => struct Counters.Counter storage ref)" } }, "id": 17561, "indexExpression": { "argumentTypes": null, "id": 17560, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17545, "src": "2655:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2637:24:65", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$16620_storage", "typeString": "struct Counters.Counter storage ref" } }, "id": 17562, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "current", "nodeType": "MemberAccess", "referencedDeclaration": 16631, "src": "2637:32:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_struct$_Counter_$16620_storage_ptr_$returns$_t_uint256_$bound_to$_t_struct$_Counter_$16620_storage_ptr_$", "typeString": "function (struct Counters.Counter storage pointer) view returns (uint256)" } }, "id": 17563, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2637:34:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 17549, "id": 17564, "nodeType": "Return", "src": "2630:41:65" } ] }, "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": 17566, "implemented": true, "kind": "function", "modifiers": [], "name": "balanceOf", "nodeType": "FunctionDefinition", "parameters": { "id": 17546, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17545, "name": "owner", "nodeType": "VariableDeclaration", "scope": 17566, "src": "2490:13:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17544, "name": "address", "nodeType": "ElementaryTypeName", "src": "2490:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "2489:15:65" }, "returnParameters": { "id": 17549, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17548, "name": "", "nodeType": "VariableDeclaration", "scope": 17566, "src": "2526:7:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17547, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2526:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2525:9:65" }, "scope": 18055, "src": "2471:207:65", "stateMutability": "view", "superFunction": 18220, "visibility": "public" }, { "body": { "id": 17590, "nodeType": "Block", "src": "2961:159:65", "statements": [ { "assignments": [ 17574 ], "declarations": [ { "constant": false, "id": 17574, "name": "owner", "nodeType": "VariableDeclaration", "scope": 17590, "src": "2971:13:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17573, "name": "address", "nodeType": "ElementaryTypeName", "src": "2971:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 17578, "initialValue": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17575, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17518, "src": "2987:11:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 17577, "indexExpression": { "argumentTypes": null, "id": 17576, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17568, "src": "2999:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2987:20:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "2971:36:65" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17584, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 17580, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17574, "src": "3025:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 17582, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "3042:1:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 17581, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "3034:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 17583, "isConstant": false, "isLValue": false, "isPure": true, "kind": 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"t_stringliteral_7481f3df2a424c0755a1ad2356614e9a5a358d461ea2eae1f89cb21cbad00397", "typeString": "literal_string \"ERC721: owner query for nonexistent token\"" } ], "id": 17579, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "3017:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17586, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3017:73:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17587, "nodeType": "ExpressionStatement", "src": "3017:73:65" }, { "expression": { "argumentTypes": null, "id": 17588, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17574, "src": "3108:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 17572, "id": 17589, "nodeType": "Return", "src": "3101:12:65" } ] }, "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 address currently marked as the owner of the given token ID", "id": 17591, "implemented": true, "kind": "function", "modifiers": [], "name": "ownerOf", "nodeType": "FunctionDefinition", "parameters": { "id": 17569, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17568, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17591, "src": "2914:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17567, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2914:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2913:17:65" }, "returnParameters": { "id": 17572, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17571, "name": "", "nodeType": "VariableDeclaration", "scope": 17591, "src": "2952:7:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17570, "name": "address", "nodeType": "ElementaryTypeName", "src": "2952:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "2951:9:65" }, "scope": 18055, "src": "2897:223:65", "stateMutability": "view", "superFunction": 18227, "visibility": "public" }, { "body": { "id": 17637, "nodeType": "Block", "src": "3594:358:65", "statements": [ { "assignments": [ 17599 ], "declarations": [ { "constant": false, "id": 17599, "name": "owner", "nodeType": "VariableDeclaration", "scope": 17637, "src": "3604:13:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17598, "name": "address", "nodeType": "ElementaryTypeName", "src": "3604:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 17603, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17601, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17595, "src": "3628:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17600, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 17591 ], "referencedDeclaration": 17591, "src": "3620:7:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 17602, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3620:16:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "3604:32:65" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17607, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 17605, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17593, "src": "3654:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "id": 17606, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17599, "src": "3660:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3654:11:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a20617070726f76616c20746f2063757272656e74206f776e6572", "id": 17608, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3667:35:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942", "typeString": "literal_string \"ERC721: approval to current owner\"" }, "value": "ERC721: approval to current owner" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942", "typeString": "literal_string \"ERC721: approval to current owner\"" } ], "id": 17604, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "3646:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17609, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3646:57:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17610, "nodeType": "ExpressionStatement", "src": "3646:57:65" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 17621, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17615, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 17612, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18360, "src": "3722:3:65", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 17613, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3722:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 17614, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17599, "src": "3736:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3722:19:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17617, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17599, "src": "3762:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 17618, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18360, "src": "3769:3:65", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 17619, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3769:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" } ], "id": 17616, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [ 17705 ], "referencedDeclaration": 17705, "src": "3745:16:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 17620, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3745:35:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "3722:58:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a20617070726f76652063616c6c6572206973206e6f74206f776e6572206e6f7220617070726f76656420666f7220616c6c", "id": 17622, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3794:58:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_6d83cef3e0cb19b8320a9c5feb26b56bbb08f152a8e61b12eca3302d8d68b23d", "typeString": "literal_string \"ERC721: approve caller is not owner nor approved for all\"" }, "value": "ERC721: approve caller is not owner nor approved for all" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_6d83cef3e0cb19b8320a9c5feb26b56bbb08f152a8e61b12eca3302d8d68b23d", "typeString": "literal_string \"ERC721: approve caller is not owner nor approved for all\"" } ], "id": 17611, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "3714:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17623, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3714:148:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17624, "nodeType": "ExpressionStatement", "src": "3714:148:65" }, { "expression": { "argumentTypes": null, "id": 17629, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17625, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17522, "src": "3873:15:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 17627, "indexExpression": { "argumentTypes": null, "id": 17626, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17595, "src": "3889:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "3873:24:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 17628, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17593, "src": "3900:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3873:29:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 17630, "nodeType": "ExpressionStatement", "src": "3873:29:65" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17632, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17599, "src": "3926:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17633, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17593, "src": "3933:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17634, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17595, "src": "3937:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17631, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18205, "src": "3917:8:65", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 17635, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3917:28:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17636, "nodeType": "EmitStatement", "src": "3912:33:65" } ] }, "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": 17638, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nodeType": "FunctionDefinition", "parameters": { "id": 17596, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17593, "name": "to", "nodeType": "VariableDeclaration", "scope": 17638, "src": "3558:10:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17592, "name": "address", "nodeType": "ElementaryTypeName", "src": "3558:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", 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"argumentTypes": null, "id": 17647, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17640, "src": "4331:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17646, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17795, "src": "4323:7:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 17648, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4323:16:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": 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"typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17650, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4315:73:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17651, "nodeType": "ExpressionStatement", "src": "4315:73:65" }, { "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17652, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17522, "src": "4406:15:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 17654, "indexExpression": { "argumentTypes": null, "id": 17653, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17640, "src": "4422:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4406:24:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 17644, "id": 17655, "nodeType": "Return", "src": "4399:31:65" } ] }, "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": 17657, "implemented": true, "kind": "function", "modifiers": [], "name": "getApproved", "nodeType": "FunctionDefinition", "parameters": { "id": 17641, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17640, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17657, "src": "4258:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17639, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4258:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4257:17:65" }, "returnParameters": { "id": 17644, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17643, "name": "", "nodeType": "VariableDeclaration", "scope": 17657, "src": "4296:7:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17642, "name": "address", "nodeType": "ElementaryTypeName", "src": "4296:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "4295:9:65" }, "scope": 18055, "src": "4237:200:65", "stateMutability": "view", "superFunction": 18259, "visibility": "public" }, { "body": { "id": 17688, "nodeType": "Block", "src": "4791:182:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17668, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 17665, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17659, "src": "4809:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 17666, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18360, "src": "4815:3:65", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 17667, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4815:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "4809:16:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a20617070726f766520746f2063616c6c6572", "id": 17669, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4827:27:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05", "typeString": "literal_string \"ERC721: approve to caller\"" }, "value": "ERC721: approve to caller" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05", "typeString": "literal_string \"ERC721: approve to caller\"" } ], "id": 17664, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "4801:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17670, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4801:54:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17671, "nodeType": "ExpressionStatement", "src": "4801:54:65" }, { "expression": { "argumentTypes": null, "id": 17679, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17672, "name": "_operatorApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17532, "src": "4866:18:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" } }, "id": 17676, "indexExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 17673, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18360, "src": "4885:3:65", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 17674, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4885:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4866:30:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 17677, "indexExpression": { "argumentTypes": null, "id": 17675, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17659, "src": "4897:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "4866:34:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 17678, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17661, "src": "4903:8:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "4866:45:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 17680, "nodeType": "ExpressionStatement", "src": "4866:45:65" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 17682, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18360, "src": "4941:3:65", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 17683, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4941:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 17684, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17659, "src": "4953:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17685, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17661, "src": "4957:8:65", "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": 17681, "name": "ApprovalForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18213, "src": "4926:14:65", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_bool_$returns$__$", "typeString": "function (address,address,bool)" } }, "id": 17686, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4926:40:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17687, "nodeType": "EmitStatement", "src": "4921:45:65" } ] }, "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": 17689, "implemented": true, "kind": "function", "modifiers": [], "name": "setApprovalForAll", "nodeType": "FunctionDefinition", "parameters": { "id": 17662, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17659, "name": "to", "nodeType": "VariableDeclaration", "scope": 17689, "src": "4757:10:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17658, "name": "address", "nodeType": "ElementaryTypeName", "src": "4757:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17661, "name": "approved", "nodeType": "VariableDeclaration", "scope": 17689, "src": "4769:13:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 17660, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4769:4:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "4756:27:65" }, "returnParameters": { "id": 17663, "nodeType": "ParameterList", "parameters": [], "src": "4791:0:65" }, "scope": 18055, "src": "4730:243:65", "stateMutability": "nonpayable", "superFunction": 18266, "visibility": "public" }, { "body": { "id": 17704, "nodeType": "Block", "src": "5381:59:65", "statements": [ { "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17698, "name": "_operatorApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17532, "src": "5398:18:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" } }, "id": 17700, "indexExpression": { "argumentTypes": null, "id": 17699, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17691, "src": "5417:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5398:25:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 17702, "indexExpression": { "argumentTypes": null, "id": 17701, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17693, "src": "5424:8:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5398:35:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 17697, "id": 17703, "nodeType": "Return", "src": "5391:42:65" } ] }, "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": 17705, "implemented": true, "kind": "function", "modifiers": [], "name": "isApprovedForAll", "nodeType": "FunctionDefinition", "parameters": { "id": 17694, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17691, "name": "owner", "nodeType": "VariableDeclaration", "scope": 17705, "src": "5321:13:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17690, "name": "address", "nodeType": "ElementaryTypeName", "src": "5321:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17693, "name": "operator", "nodeType": "VariableDeclaration", "scope": 17705, "src": "5336:16:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17692, "name": "address", "nodeType": "ElementaryTypeName", "src": "5336:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "5320:33:65" }, "returnParameters": { "id": 17697, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17696, "name": "", "nodeType": "VariableDeclaration", "scope": 17705, "src": "5375:4:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 17695, "name": "bool", "nodeType": "ElementaryTypeName", "src": "5375:4:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "5374:6:65" }, "scope": 18055, "src": "5295:145:65", "stateMutability": "view", "superFunction": 18275, "visibility": "public" }, { "body": { "id": 17729, "nodeType": "Block", "src": "5949:213:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 17716, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18360, "src": "6038:3:65", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 17717, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "6038:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 17718, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17711, "src": "6050:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17715, "name": "_isApprovedOrOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17834, "src": "6019:18:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) view returns (bool)" } }, "id": 17719, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6019:39:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a207472616e736665722063616c6c6572206973206e6f74206f776e6572206e6f7220617070726f766564", "id": 17720, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6060:51:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_c8682f3ad98807db59a6ec6bb812b72fed0a66e3150fa8239699ee83885247f2", "typeString": "literal_string \"ERC721: transfer caller is not owner nor approved\"" }, "value": "ERC721: transfer caller is not owner nor approved" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c8682f3ad98807db59a6ec6bb812b72fed0a66e3150fa8239699ee83885247f2", "typeString": "literal_string \"ERC721: transfer caller is not owner nor approved\"" } ], "id": 17714, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "6011:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17721, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6011:101:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17722, "nodeType": "ExpressionStatement", "src": "6011:101:65" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17724, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17707, "src": "6137:4:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17725, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17709, "src": "6143:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17726, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17711, "src": "6147:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17723, "name": "_transferFrom", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17991, "src": "6123:13:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 17727, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6123:32:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17728, "nodeType": "ExpressionStatement", "src": "6123:32:65" } ] }, "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": 17730, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 17712, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17707, "name": "from", "nodeType": "VariableDeclaration", "scope": 17730, "src": "5899:12:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17706, "name": "address", "nodeType": "ElementaryTypeName", "src": "5899:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17709, "name": "to", "nodeType": "VariableDeclaration", "scope": 17730, "src": "5913:10:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17708, "name": "address", "nodeType": "ElementaryTypeName", "src": "5913:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17711, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17730, "src": "5925:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17710, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5925:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5898:43:65" }, "returnParameters": { "id": 17713, "nodeType": "ParameterList", "parameters": [], "src": "5949:0:65" }, "scope": 18055, "src": "5877:285:65", "stateMutability": "nonpayable", "superFunction": 18245, "visibility": "public" }, { "body": { "id": 17746, "nodeType": "Block", "src": "6871:56:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17740, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17732, "src": "6898:4:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17741, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17734, "src": "6904:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17742, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17736, "src": "6908:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "", "id": 17743, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6917:2:65", "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": 17739, "name": "safeTransferFrom", "nodeType": "Identifier", "overloadedDeclarations": [ 17747, 17775 ], "referencedDeclaration": 17775, "src": "6881:16:65", "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": 17744, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6881:39:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17745, "nodeType": "ExpressionStatement", "src": "6881:39:65" } ] }, "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", "id": 17747, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 17737, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17732, "name": "from", "nodeType": "VariableDeclaration", "scope": 17747, "src": "6821:12:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17731, "name": "address", "nodeType": "ElementaryTypeName", "src": "6821:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17734, "name": "to", "nodeType": "VariableDeclaration", "scope": 17747, "src": "6835:10:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17733, "name": "address", "nodeType": "ElementaryTypeName", "src": "6835:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17736, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17747, "src": "6847:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17735, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6847:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "6820:43:65" }, "returnParameters": { "id": 17738, "nodeType": "ParameterList", "parameters": [], "src": "6871:0:65" }, "scope": 18055, "src": "6795:132:65", "stateMutability": "nonpayable", "superFunction": 18236, "visibility": "public" }, { "body": { "id": 17774, "nodeType": "Block", "src": "7728:169:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17759, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17749, "src": "7751:4:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17760, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17751, "src": "7757:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17761, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17753, "src": "7761:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17758, "name": "transferFrom", "nodeType": "Identifier", "overloadedDeclarations": [ 17730 ], "referencedDeclaration": 17730, "src": "7738:12:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 17762, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7738:31:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17763, "nodeType": "ExpressionStatement", "src": "7738:31:65" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17766, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17749, "src": "7810:4:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17767, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17751, "src": "7816:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17768, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17753, "src": "7820:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 17769, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17755, "src": "7829:5:65", "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": 17765, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18031, "src": "7787:22:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 17770, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7787:48:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 17771, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7837:52:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" }, "value": "ERC721: transfer to non ERC721Receiver implementer" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" } ], "id": 17764, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "7779:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17772, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7779:111:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17773, "nodeType": "ExpressionStatement", "src": "7779:111:65" } ] }, "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": 17775, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 17756, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17749, "name": "from", "nodeType": "VariableDeclaration", "scope": 17775, "src": "7658:12:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17748, "name": "address", "nodeType": "ElementaryTypeName", "src": "7658:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17751, "name": "to", "nodeType": "VariableDeclaration", "scope": 17775, "src": "7672:10:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17750, "name": "address", "nodeType": "ElementaryTypeName", "src": "7672:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17753, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17775, "src": "7684:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17752, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7684:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17755, "name": "_data", "nodeType": "VariableDeclaration", "scope": 17775, "src": "7701:18:65", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 17754, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "7701:5:65", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "7657:63:65" }, "returnParameters": { "id": 17757, "nodeType": "ParameterList", "parameters": [], "src": "7728:0:65" }, "scope": 18055, "src": "7632:265:65", "stateMutability": "nonpayable", "superFunction": 18286, "visibility": "public" }, { "body": { "id": 17794, "nodeType": "Block", "src": "8155:89:65", "statements": [ { "assignments": [ 17783 ], "declarations": [ { "constant": false, "id": 17783, "name": "owner", "nodeType": "VariableDeclaration", "scope": 17794, "src": "8165:13:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17782, "name": "address", "nodeType": "ElementaryTypeName", "src": "8165:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 17787, "initialValue": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17784, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17518, "src": "8181:11:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 17786, "indexExpression": { "argumentTypes": null, "id": 17785, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17777, "src": "8193:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "8181:20:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "8165:36:65" }, { "expression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17792, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 17788, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17783, "src": "8218:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 17790, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8235:1:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 17789, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8227:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 17791, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8227:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "8218:19:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 17781, "id": 17793, "nodeType": "Return", "src": "8211:26:65" } ] }, "documentation": "@dev Returns whether the specified token exists.\n@param tokenId uint256 ID of the token to query the existence of\n@return bool whether the token exists", "id": 17795, "implemented": true, "kind": "function", "modifiers": [], "name": "_exists", "nodeType": "FunctionDefinition", "parameters": { "id": 17778, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17777, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17795, "src": "8109:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17776, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8109:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "8108:17:65" }, "returnParameters": { "id": 17781, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17780, "name": "", "nodeType": "VariableDeclaration", "scope": 17795, "src": "8149:4:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 17779, "name": "bool", "nodeType": "ElementaryTypeName", "src": "8149:4:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "8148:6:65" }, "scope": 18055, "src": "8092:152:65", "stateMutability": "view", "superFunction": null, "visibility": "internal" }, { "body": { "id": 17833, "nodeType": "Block", "src": "8696:238:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17806, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17799, "src": "8722:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17805, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17795, "src": "8714:7:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 17807, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8714:16:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a206f70657261746f7220717565727920666f72206e6f6e6578697374656e7420746f6b656e", "id": 17808, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8732:46:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c", "typeString": "literal_string \"ERC721: operator query for nonexistent token\"" }, "value": "ERC721: operator query for nonexistent token" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c", "typeString": "literal_string \"ERC721: operator query for nonexistent token\"" } ], "id": 17804, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "8706:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17809, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8706:73:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17810, "nodeType": "ExpressionStatement", "src": "8706:73:65" }, { "assignments": [ 17812 ], "declarations": [ { "constant": false, "id": 17812, "name": "owner", "nodeType": "VariableDeclaration", "scope": 17833, "src": "8789:13:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17811, "name": "address", "nodeType": "ElementaryTypeName", "src": "8789:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 17816, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17814, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17799, "src": "8813:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17813, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 17591 ], "referencedDeclaration": 17591, "src": "8805:7:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 17815, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8805:16:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "8789:32:65" }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 17830, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 17825, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17819, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 17817, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17797, "src": "8839:7:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 17818, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17812, "src": "8850:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8839:16:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17824, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17821, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17799, "src": "8871:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17820, "name": "getApproved", "nodeType": "Identifier", "overloadedDeclarations": [ 17657 ], "referencedDeclaration": 17657, "src": "8859:11:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 17822, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8859:20:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 17823, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17797, "src": "8883:7:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8859:31:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "8839:51:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17827, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17812, "src": "8911:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17828, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17797, "src": "8918:7:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 17826, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [ 17705 ], "referencedDeclaration": 17705, "src": "8894:16:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 17829, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8894:32:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "8839:87:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 17831, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "8838:89:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 17803, "id": 17832, "nodeType": "Return", "src": "8831:96:65" } ] }, "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,\nis an operator of the owner, or is the owner of the token", "id": 17834, "implemented": true, "kind": "function", "modifiers": [], "name": "_isApprovedOrOwner", "nodeType": "FunctionDefinition", "parameters": { "id": 17800, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17797, "name": "spender", "nodeType": "VariableDeclaration", "scope": 17834, "src": "8633:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17796, "name": "address", "nodeType": "ElementaryTypeName", "src": "8633:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17799, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17834, "src": "8650:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17798, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8650:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "8632:34:65" }, "returnParameters": { "id": 17803, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17802, "name": "", "nodeType": "VariableDeclaration", "scope": 17834, "src": "8690:4:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 17801, "name": "bool", "nodeType": "ElementaryTypeName", "src": "8690:4:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "8689:6:65" }, "scope": 18055, "src": "8605:329:65", "stateMutability": "view", "superFunction": null, "visibility": "internal" }, { "body": { "id": 17878, "nodeType": "Block", "src": "9232:274:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17846, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 17842, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17836, "src": "9250:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 17844, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9264:1:65", "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": 17843, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9256:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 17845, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9256:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "9250:16:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a206d696e7420746f20746865207a65726f2061646472657373", "id": 17847, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9268:34:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_8a66f4bb6512ffbfcc3db9b42318eb65f26ac15163eaa9a1e5cfa7bee9d1c7c6", "typeString": "literal_string \"ERC721: mint to the zero address\"" }, "value": "ERC721: mint to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_8a66f4bb6512ffbfcc3db9b42318eb65f26ac15163eaa9a1e5cfa7bee9d1c7c6", "typeString": "literal_string \"ERC721: mint to the zero address\"" } ], "id": 17841, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "9242:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17848, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9242:61:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17849, "nodeType": "ExpressionStatement", "src": "9242:61:65" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17854, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "9321:17:65", "subExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17852, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17838, "src": "9330:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17851, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17795, "src": "9322:7:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 17853, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9322:16:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a20746f6b656e20616c7265616479206d696e746564", "id": 17855, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9340:30:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" }, "value": "ERC721: token already minted" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" } ], "id": 17850, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "9313:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17856, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9313:58:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17857, "nodeType": "ExpressionStatement", "src": "9313:58:65" }, { "expression": { "argumentTypes": null, "id": 17862, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17858, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17518, "src": "9382:11:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 17860, "indexExpression": { "argumentTypes": null, "id": 17859, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17838, "src": "9394:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9382:20:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 17861, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17836, "src": "9405:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9382:25:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 17863, "nodeType": "ExpressionStatement", "src": "9382:25:65" }, { "expression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17864, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17526, "src": "9417:17:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_Counter_$16620_storage_$", "typeString": "mapping(address => struct Counters.Counter storage ref)" } }, "id": 17866, "indexExpression": { "argumentTypes": null, "id": 17865, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17836, "src": "9435:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9417:21:65", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$16620_storage", "typeString": "struct Counters.Counter storage ref" } }, "id": 17867, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "increment", "nodeType": "MemberAccess", "referencedDeclaration": 16643, "src": "9417:31:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_Counter_$16620_storage_ptr_$returns$__$bound_to$_t_struct$_Counter_$16620_storage_ptr_$", "typeString": "function (struct Counters.Counter storage pointer)" } }, "id": 17868, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9417:33:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17869, "nodeType": "ExpressionStatement", "src": "9417:33:65" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 17872, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9483:1:65", "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": 17871, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9475:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 17873, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9475:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 17874, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17836, "src": "9487:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17875, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17838, "src": "9491:7:65", "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": 17870, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18197, "src": "9466:8:65", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 17876, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9466:33:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17877, "nodeType": "EmitStatement", "src": "9461:38:65" } ] }, "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": 17879, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nodeType": "FunctionDefinition", "parameters": { "id": 17839, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17836, "name": "to", "nodeType": "VariableDeclaration", "scope": 17879, "src": "9194:10:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17835, "name": "address", "nodeType": "ElementaryTypeName", "src": "9194:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17838, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17879, "src": "9206:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17837, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9206:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "9193:29:65" }, "returnParameters": { "id": 17840, "nodeType": "ParameterList", "parameters": [], "src": "9232:0:65" }, "scope": 18055, "src": "9179:327:65", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 17921, "nodeType": "Block", "src": "9837:268:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17891, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17888, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17883, "src": "9863:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17887, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 17591 ], "referencedDeclaration": 17591, "src": "9855:7:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 17889, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9855:16:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 17890, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17881, "src": "9875:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9855:25:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a206275726e206f6620746f6b656e2074686174206973206e6f74206f776e", "id": 17892, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9882:39:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_d9af5b321f427d3820b5fc07b432b1ddf1bb6411d5d926d9de9773fd616ab5ee", "typeString": "literal_string \"ERC721: burn of token that is not own\"" }, "value": "ERC721: burn of token that is not own" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_d9af5b321f427d3820b5fc07b432b1ddf1bb6411d5d926d9de9773fd616ab5ee", "typeString": "literal_string \"ERC721: burn of token that is not own\"" } ], "id": 17886, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "9847:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17893, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9847:75:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17894, "nodeType": "ExpressionStatement", "src": "9847:75:65" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17896, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17883, "src": "9948:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17895, "name": "_clearApproval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18054, "src": "9933:14:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_uint256_$returns$__$", "typeString": "function (uint256)" } }, "id": 17897, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9933:23:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17898, "nodeType": "ExpressionStatement", "src": "9933:23:65" }, { "expression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17899, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17526, "src": "9967:17:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_Counter_$16620_storage_$", "typeString": "mapping(address => struct Counters.Counter storage ref)" } }, "id": 17901, "indexExpression": { "argumentTypes": null, "id": 17900, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17881, "src": "9985:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9967:24:65", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$16620_storage", "typeString": "struct Counters.Counter storage ref" } }, "id": 17902, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "decrement", "nodeType": "MemberAccess", "referencedDeclaration": 16659, "src": "9967:34:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_Counter_$16620_storage_ptr_$returns$__$bound_to$_t_struct$_Counter_$16620_storage_ptr_$", "typeString": "function (struct Counters.Counter storage pointer)" } }, "id": 17903, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9967:36:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17904, "nodeType": "ExpressionStatement", "src": "9967:36:65" }, { "expression": { "argumentTypes": null, "id": 17911, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17905, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17518, "src": "10013:11:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 17907, "indexExpression": { "argumentTypes": null, "id": 17906, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17883, "src": "10025:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10013:20:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 17909, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10044:1:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 17908, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10036:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 17910, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10036:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "10013:33:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 17912, "nodeType": "ExpressionStatement", "src": "10013:33:65" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17914, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17881, "src": "10071:5:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 17916, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10086:1:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 17915, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10078:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 17917, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10078:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 17918, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17883, "src": "10090:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17913, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18197, "src": "10062:8:65", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 17919, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10062:36:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17920, "nodeType": "EmitStatement", "src": "10057:41:65" } ] }, "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": 17922, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 17884, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17881, "name": "owner", "nodeType": "VariableDeclaration", "scope": 17922, "src": "9796:13:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17880, "name": "address", "nodeType": "ElementaryTypeName", "src": "9796:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17883, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17922, "src": "9811:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17882, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9811:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "9795:32:65" }, "returnParameters": { "id": 17885, "nodeType": "ParameterList", "parameters": [], "src": "9837:0:65" }, "scope": 18055, "src": "9781:324:65", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 17934, "nodeType": "Block", "src": "10327:49:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17929, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17924, "src": "10351:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17928, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 17591 ], "referencedDeclaration": 17591, "src": "10343:7:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 17930, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10343:16:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17931, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17924, "src": "10361:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17927, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [ 17922, 17935 ], "referencedDeclaration": 17922, "src": "10337:5:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 17932, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10337:32:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17933, "nodeType": "ExpressionStatement", "src": "10337:32:65" } ] }, "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": 17935, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 17925, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17924, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17935, "src": "10301:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17923, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10301:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "10300:17:65" }, "returnParameters": { "id": 17926, "nodeType": "ParameterList", "parameters": [], "src": "10327:0:65" }, "scope": 18055, "src": "10286:90:65", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 17990, "nodeType": "Block", "src": "10826:372:65", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17949, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17946, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17941, "src": "10852:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17945, "name": "ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [ 17591 ], "referencedDeclaration": 17591, "src": "10844:7:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 17947, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10844:16:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 17948, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17937, "src": "10864:4:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10844:24:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a207472616e73666572206f6620746f6b656e2074686174206973206e6f74206f776e", "id": 17950, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10870:43:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_a01073130a885d6c1c1af6ac75fc3b1c4f9403c235362962bbf528e2bd87d950", "typeString": "literal_string \"ERC721: transfer of token that is not own\"" }, "value": "ERC721: transfer of token that is not own" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_a01073130a885d6c1c1af6ac75fc3b1c4f9403c235362962bbf528e2bd87d950", "typeString": "literal_string \"ERC721: transfer of token that is not own\"" } ], "id": 17944, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "10836:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17951, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10836:78:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17952, "nodeType": "ExpressionStatement", "src": "10836:78:65" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 17958, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 17954, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17939, "src": "10932:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 17956, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10946:1:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 17955, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10938:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 17957, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10938:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "10932:16:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "4552433732313a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 17959, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10950:38:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" }, "value": "ERC721: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" } ], "id": 17953, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "src": "10924:7:65", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 17960, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10924:65:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17961, "nodeType": "ExpressionStatement", "src": "10924:65:65" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17963, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17941, "src": "11015:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17962, "name": "_clearApproval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18054, "src": "11000:14:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_uint256_$returns$__$", "typeString": "function (uint256)" } }, "id": 17964, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11000:23:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17965, "nodeType": "ExpressionStatement", "src": "11000:23:65" }, { "expression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17966, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17526, "src": "11034:17:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_Counter_$16620_storage_$", "typeString": "mapping(address => struct Counters.Counter storage ref)" } }, "id": 17968, "indexExpression": { "argumentTypes": null, "id": 17967, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17937, "src": "11052:4:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "11034:23:65", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$16620_storage", "typeString": "struct Counters.Counter storage ref" } }, "id": 17969, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "decrement", "nodeType": "MemberAccess", "referencedDeclaration": 16659, "src": "11034:33:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_Counter_$16620_storage_ptr_$returns$__$bound_to$_t_struct$_Counter_$16620_storage_ptr_$", "typeString": "function (struct Counters.Counter storage pointer)" } }, "id": 17970, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11034:35:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17971, "nodeType": "ExpressionStatement", "src": "11034:35:65" }, { "expression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17972, "name": "_ownedTokensCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17526, "src": "11079:17:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_Counter_$16620_storage_$", "typeString": "mapping(address => struct Counters.Counter storage ref)" } }, "id": 17974, "indexExpression": { "argumentTypes": null, "id": 17973, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17939, "src": "11097:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "11079:21:65", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$16620_storage", "typeString": "struct Counters.Counter storage ref" } }, "id": 17975, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "increment", "nodeType": "MemberAccess", "referencedDeclaration": 16643, "src": "11079:31:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_Counter_$16620_storage_ptr_$returns$__$bound_to$_t_struct$_Counter_$16620_storage_ptr_$", "typeString": "function (struct Counters.Counter storage pointer)" } }, "id": 17976, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11079:33:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17977, "nodeType": "ExpressionStatement", "src": "11079:33:65" }, { "expression": { "argumentTypes": null, "id": 17982, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 17978, "name": "_tokenOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17518, "src": "11123:11:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 17980, "indexExpression": { "argumentTypes": null, "id": 17979, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17941, "src": "11135:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11123:20:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 17981, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17939, "src": "11146:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11123:25:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 17983, "nodeType": "ExpressionStatement", "src": "11123:25:65" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 17985, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17937, "src": "11173:4:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17986, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17939, "src": "11179:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 17987, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17941, "src": "11183:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 17984, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18197, "src": "11164:8:65", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 17988, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11164:27:65", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 17989, "nodeType": "EmitStatement", "src": "11159:32:65" } ] }, "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": 17991, "implemented": true, "kind": "function", "modifiers": [], "name": "_transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 17942, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17937, "name": "from", "nodeType": "VariableDeclaration", "scope": 17991, "src": "10774:12:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17936, "name": "address", "nodeType": "ElementaryTypeName", "src": "10774:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17939, "name": "to", "nodeType": "VariableDeclaration", "scope": 17991, "src": "10788:10:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17938, "name": "address", "nodeType": "ElementaryTypeName", "src": "10788:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17941, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 17991, "src": "10800:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17940, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10800:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "10773:43:65" }, "returnParameters": { "id": 17943, "nodeType": "ParameterList", "parameters": [], "src": "10826:0:65" }, "scope": 18055, "src": "10751:447:65", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 18030, "nodeType": "Block", "src": "11902:216:65", "statements": [ { "condition": { "argumentTypes": null, "id": 18007, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "11916:16:65", "subExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "expression": { "argumentTypes": null, "id": 18004, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17995, "src": "11917:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 18005, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "isContract", "nodeType": "MemberAccess", "referencedDeclaration": 18344, "src": "11917:13:65", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$returns$_t_bool_$bound_to$_t_address_$", "typeString": "function (address) view returns (bool)" } }, "id": 18006, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11917:15:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 18011, "nodeType": "IfStatement", "src": "11912:58:65", "trueBody": { "id": 18010, "nodeType": "Block", "src": "11934:36:65", "statements": [ { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 18008, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "11955:4:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 18003, "id": 18009, "nodeType": "Return", "src": "11948:11:65" } ] } }, { "assignments": [ 18013 ], "declarations": [ { "constant": false, "id": 18013, "name": "retval", "nodeType": "VariableDeclaration", "scope": 18030, "src": "11980:13:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 18012, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "11980:6:65", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": null, "visibility": "internal" } ], "id": 18024, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 18018, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18360, "src": "12033:3:65", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 18019, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "12033:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 18020, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17993, "src": "12045:4:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 18021, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17997, "src": "12051:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 18022, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17999, "src": "12060:5:65", "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": 18015, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17995, "src": "12012:2:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 18014, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18326, "src": "11996:15:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$18326_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 18016, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11996:19:65", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC721Receiver_$18326", "typeString": "contract IERC721Receiver" } }, "id": 18017, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 18325, "src": "11996:36:65", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bytes4_$", "typeString": "function (address,address,uint256,bytes memory) external returns (bytes4)" } }, "id": 18023, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11996:70:65", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "VariableDeclarationStatement", "src": "11980:86:65" }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "id": 18027, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 18025, "name": "retval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18013, "src": "12084:6:65", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 18026, "name": "_ERC721_RECEIVED", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17514, "src": "12094:16:65", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "src": "12084:26:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 18028, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "12083:28:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 18003, "id": 18029, "nodeType": "Return", "src": "12076:35:65" } ] }, "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 * This function is deprecated.\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 bool whether the call correctly returned the expected magic value", "id": 18031, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkOnERC721Received", "nodeType": "FunctionDefinition", "parameters": { "id": 18000, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 17993, "name": "from", "nodeType": "VariableDeclaration", "scope": 18031, "src": "11803:12:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17992, "name": "address", "nodeType": "ElementaryTypeName", "src": "11803:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17995, "name": "to", "nodeType": "VariableDeclaration", "scope": 18031, "src": "11817:10:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 17994, "name": "address", "nodeType": "ElementaryTypeName", "src": "11817:7:65", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17997, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 18031, "src": "11829:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 17996, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11829:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 17999, "name": "_data", "nodeType": "VariableDeclaration", "scope": 18031, "src": "11846:18:65", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 17998, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "11846:5:65", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "11802:63:65" }, "returnParameters": { "id": 18003, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 18002, "name": "", "nodeType": "VariableDeclaration", "scope": 18031, "src": "11892:4:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 18001, "name": "bool", "nodeType": "ElementaryTypeName", "src": "11892:4:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "11891:6:65" }, "scope": 18055, "src": "11771:347:65", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 18053, "nodeType": "Block", "src": "12329:122:65", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 18042, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 18036, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17522, "src": "12343:15:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 18038, "indexExpression": { "argumentTypes": null, "id": 18037, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18033, "src": "12359:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "12343:24:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 18040, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12379:1:65", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 18039, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12371:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 18041, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12371:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "12343:38:65", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 18052, "nodeType": "IfStatement", "src": "12339:106:65", "trueBody": { "id": 18051, "nodeType": "Block", "src": "12383:62:65", "statements": [ { "expression": { "argumentTypes": null, "id": 18049, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 18043, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 17522, "src": "12397:15:65", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 18045, "indexExpression": { "argumentTypes": null, "id": 18044, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 18033, "src": "12413:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "12397:24:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 18047, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12432:1:65", "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": 18046, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12424:7:65", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 18048, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12424:10:65", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "12397:37:65", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 18050, "nodeType": "ExpressionStatement", "src": "12397:37:65" } ] } } ] }, "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": 18054, "implemented": true, "kind": "function", "modifiers": [], "name": "_clearApproval", "nodeType": "FunctionDefinition", "parameters": { "id": 18034, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 18033, "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 18054, "src": "12304:15:65", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 18032, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12304:7:65", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "12303:17:65" }, "returnParameters": { "id": 18035, "nodeType": "ParameterList", "parameters": [], "src": "12329:0:65" }, "scope": 18055, "src": "12280:171:65", "stateMutability": "nonpayable", "superFunction": null, "visibility": "private" } ], "scope": 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"Identifier", "src": "4903:8:65" } ], "id": 17679, "name": "Assignment", "src": "4866:45:65" } ], "id": 17680, "name": "ExpressionStatement", "src": "4866:45:65" }, { "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "type": "tuple()", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_bool", "typeString": "bool" } ], "overloadedDeclarations": [ null ], "referencedDeclaration": 18213, "type": "function (address,address,bool)", "value": "ApprovalForAll" }, "id": 17681, "name": "Identifier", "src": "4926:14:65" }, { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "member_name": "sender", "referencedDeclaration": null, "type": "address payable" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 18360, "type": "msg", "value": "msg" }, "id": 17682, "name": "Identifier", "src": "4941:3:65" } ], "id": 17683, "name": "MemberAccess", "src": "4941:10:65" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17659, "type": "address", "value": "to" }, "id": 17684, "name": "Identifier", "src": "4953:2:65" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17661, "type": "bool", "value": "approved" }, "id": 17685, "name": "Identifier", "src": "4957:8:65" } ], "id": 17686, "name": "FunctionCall", "src": "4926:40:65" } ], "id": 17687, "name": "EmitStatement", "src": "4921:45:65" } ], "id": 17688, "name": "Block", "src": "4791:182:65" } ], "id": 17689, "name": "FunctionDefinition", "src": "4730:243:65" }, { "attributes": { "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", "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "isApprovedForAll", "scope": 18055, "stateMutability": "view", "superFunction": 18275, "visibility": "public" }, "children": [ { "children": [ { "attributes": { "constant": false, "name": "owner", "scope": 17705, "stateVariable": false, "storageLocation": "default", "type": "address", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "address", "stateMutability": "nonpayable", "type": "address" }, "id": 17690, "name": "ElementaryTypeName", "src": "5321:7:65" } ], "id": 17691, "name": "VariableDeclaration", "src": "5321:13:65" }, { "attributes": { "constant": false, "name": "operator", "scope": 17705, "stateVariable": false, "storageLocation": "default", "type": "address", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "address", "stateMutability": "nonpayable", "type": "address" }, "id": 17692, "name": "ElementaryTypeName", "src": "5336:7:65" } ], "id": 17693, "name": "VariableDeclaration", "src": "5336:16:65" } ], "id": 17694, "name": "ParameterList", "src": "5320:33:65" }, { "children": [ { "attributes": { "constant": false, "name": "", "scope": 17705, "stateVariable": false, "storageLocation": "default", "type": "bool", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "bool", "type": "bool" }, "id": 17695, "name": "ElementaryTypeName", "src": "5375:4:65" } ], "id": 17696, "name": "VariableDeclaration", "src": "5375:4:65" } ], "id": 17697, "name": "ParameterList", "src": "5374:6:65" }, { "children": [ { "attributes": { "functionReturnParameters": 17697 }, "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "type": "bool" }, "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "type": "mapping(address => bool)" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17532, "type": "mapping(address => mapping(address => bool))", "value": "_operatorApprovals" }, "id": 17698, "name": "Identifier", "src": "5398:18:65" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17691, "type": "address", "value": "owner" }, "id": 17699, "name": "Identifier", "src": "5417:5:65" } ], "id": 17700, "name": "IndexAccess", "src": "5398:25:65" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17693, "type": "address", "value": "operator" }, "id": 17701, "name": "Identifier", "src": "5424:8:65" } ], "id": 17702, "name": "IndexAccess", "src": "5398:35:65" } ], "id": 17703, "name": "Return", "src": "5391:42:65" } ], "id": 17704, "name": "Block", "src": "5381:59:65" } ], "id": 17705, "name": "FunctionDefinition", "src": "5295:145:65" }, { "attributes": { "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", "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "transferFrom", "scope": 18055, "stateMutability": "nonpayable", "superFunction": 18245, "visibility": "public" }, "children": [ { "children": [ { "attributes": { "constant": false, "name": "from", "scope": 17730, "stateVariable": false, "storageLocation": "default", "type": "address", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "address", "stateMutability": "nonpayable", "type": "address" }, "id": 17706, "name": "ElementaryTypeName", "src": "5899:7:65" } ], "id": 17707, "name": "VariableDeclaration", "src": "5899:12:65" }, { "attributes": { "constant": false, "name": "to", "scope": 17730, "stateVariable": false, "storageLocation": "default", "type": "address", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "address", "stateMutability": "nonpayable", "type": "address" }, "id": 17708, "name": "ElementaryTypeName", "src": "5913:7:65" } ], "id": 17709, "name": "VariableDeclaration", "src": "5913:10:65" }, { "attributes": { "constant": false, "name": "tokenId", "scope": 17730, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 17710, "name": "ElementaryTypeName", "src": "5925:7:65" } ], "id": 17711, "name": "VariableDeclaration", "src": "5925:15:65" } ], "id": 17712, "name": "ParameterList", "src": "5898:43:65" }, { "attributes": { "parameters": [ null ] }, "children": [], "id": 17713, "name": "ParameterList", "src": "5949:0:65" }, { "children": [ { "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "type": "tuple()", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c8682f3ad98807db59a6ec6bb812b72fed0a66e3150fa8239699ee83885247f2", "typeString": "literal_string \"ERC721: transfer caller is not owner nor approved\"" } ], "overloadedDeclarations": [ 18363, 18364 ], "referencedDeclaration": 18364, "type": "function (bool,string memory) pure", "value": "require" }, "id": 17714, "name": "Identifier", "src": "6011:7:65" }, { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "type": "bool", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "overloadedDeclarations": [ null ], "referencedDeclaration": 17834, "type": "function (address,uint256) view returns (bool)", "value": "_isApprovedOrOwner" }, "id": 17715, "name": "Identifier", "src": "6019:18:65" }, { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "member_name": "sender", "referencedDeclaration": null, "type": "address payable" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 18360, "type": "msg", "value": "msg" }, "id": 17716, "name": "Identifier", "src": "6038:3:65" } ], "id": 17717, "name": "MemberAccess", "src": "6038:10:65" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17711, "type": "uint256", "value": "tokenId" }, "id": 17718, "name": "Identifier", "src": "6050:7:65" } ], "id": 17719, "name": "FunctionCall", "src": "6019:39:65" }, { "attributes": { "argumentTypes": null, "hexvalue": "4552433732313a207472616e736665722063616c6c6572206973206e6f74206f776e6572206e6f7220617070726f766564", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "string", "type": "literal_string \"ERC721: transfer caller is not owner nor approved\"", "value": "ERC721: transfer caller is not owner nor approved" }, "id": 17720, "name": "Literal", "src": "6060:51:65" } ], "id": 17721, "name": "FunctionCall", "src": "6011:101:65" } ], "id": 17722, "name": "ExpressionStatement", "src": "6011:101:65" }, { "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "type": "tuple()", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "overloadedDeclarations": [ null ], "referencedDeclaration": 17991, "type": "function (address,address,uint256)", "value": "_transferFrom" }, "id": 17723, "name": "Identifier", "src": "6123:13:65" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17707, "type": "address", "value": "from" }, "id": 17724, "name": "Identifier", "src": "6137:4:65" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17709, "type": "address", "value": "to" }, "id": 17725, "name": "Identifier", "src": "6143:2:65" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17711, "type": "uint256", "value": "tokenId" }, "id": 17726, "name": "Identifier", "src": "6147:7:65" } ], "id": 17727, "name": "FunctionCall", "src": "6123:32:65" } ], "id": 17728, "name": "ExpressionStatement", "src": "6123:32:65" } ], "id": 17729, "name": "Block", "src": "5949:213:65" } ], "id": 17730, "name": "FunctionDefinition", "src": "5877:285:65" }, { "attributes": { "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", "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "safeTransferFrom", "scope": 18055, "stateMutability": "nonpayable", "superFunction": 18236, "visibility": "public" }, "children": [ { "children": [ { "attributes": { "constant": false, "name": "from", "scope": 17747, "stateVariable": false, "storageLocation": "default", "type": "address", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "address", "stateMutability": "nonpayable", "type": "address" }, "id": 17731, "name": "ElementaryTypeName", "src": "6821:7:65" } ], "id": 17732, "name": "VariableDeclaration", "src": "6821:12:65" }, { "attributes": { "constant": false, "name": "to", "scope": 17747, "stateVariable": false, "storageLocation": "default", "type": "address", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "address", "stateMutability": "nonpayable", "type": "address" }, "id": 17733, "name": "ElementaryTypeName", "src": "6835:7:65" } ], "id": 17734, "name": "VariableDeclaration", "src": "6835:10:65" }, { "attributes": { "constant": false, "name": "tokenId", "scope": 17747, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 17735, "name": "ElementaryTypeName", "src": "6847:7:65" } ], "id": 17736, "name": "VariableDeclaration", "src": "6847:15:65" } ], "id": 17737, "name": "ParameterList", "src": "6820:43:65" }, { "attributes": { "parameters": [ null ] }, "children": [], "id": 17738, "name": "ParameterList", "src": "6871:0:65" }, { "children": [ { "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "type": "tuple()", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" } ], "overloadedDeclarations": [ 17747, 17775 ], "referencedDeclaration": 17775, "type": "function (address,address,uint256,bytes memory)", "value": "safeTransferFrom" }, "id": 17739, "name": "Identifier", "src": "6881:16:65" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 17732, "type": 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"FunctionDefinition", "src": "6795:132:65" }, { "attributes": { "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", "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "safeTransferFrom", "scope": 18055, "stateMutability": "nonpayable", "superFunction": 18286, "visibility": "public" }, "children": [ { "children": [ { "attributes": { "constant": false, "name": 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"version": "0.5.17+commit.d19bba13.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.3.4", "updatedAt": "2021-11-23T11:52:09.484Z", "devdoc": { "details": "see https://eips.ethereum.org/EIPS/eip-721", "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": "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": "See `IERC165.supportsInterface`. * Time complexity O(1), guaranteed to always use less than 30 000 gas." }, "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": {} } }