{ "contractName": "ERC721", "abi": [ { "inputs": [ { "internalType": "string", "name": "name_", "type": "string" }, { "internalType": "string", "name": "symbol_", "type": "string" } ], "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" }, { "inputs": [ { "internalType": "bytes4", "name": "interfaceId", "type": "bytes4" } ], "name": "supportsInterface", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "ownerOf", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "name", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "symbol", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "tokenURI", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "approve", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "getApproved", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "operator", "type": "address" }, { "internalType": "bool", "name": "approved", "type": "bool" } ], "name": "setApprovalForAll", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "operator", "type": "address" } ], "name": "isApprovedForAll", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "transferFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "safeTransferFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "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": [], "stateMutability": "nonpayable", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"string\",\"name\":\"name_\",\"type\":\"string\"},{\"internalType\":\"string\",\"name\":\"symbol_\",\"type\":\"string\"}],\"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\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"getApproved\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"}],\"name\":\"isApprovedForAll\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"ownerOf\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"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\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"internalType\":\"bool\",\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"setApprovalForAll\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes4\",\"name\":\"interfaceId\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"tokenURI\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including the Metadata extension, but not including the Enumerable extension, which is available separately as {ERC721Enumerable}.\",\"kind\":\"dev\",\"methods\":{\"approve(address,uint256)\":{\"details\":\"See {IERC721-approve}.\"},\"balanceOf(address)\":{\"details\":\"See {IERC721-balanceOf}.\"},\"constructor\":{\"details\":\"Initializes the contract by setting a `name` and a `symbol` to the token collection.\"},\"getApproved(uint256)\":{\"details\":\"See {IERC721-getApproved}.\"},\"isApprovedForAll(address,address)\":{\"details\":\"See {IERC721-isApprovedForAll}.\"},\"name()\":{\"details\":\"See {IERC721Metadata-name}.\"},\"ownerOf(uint256)\":{\"details\":\"See {IERC721-ownerOf}.\"},\"safeTransferFrom(address,address,uint256)\":{\"details\":\"See {IERC721-safeTransferFrom}.\"},\"safeTransferFrom(address,address,uint256,bytes)\":{\"details\":\"See {IERC721-safeTransferFrom}.\"},\"setApprovalForAll(address,bool)\":{\"details\":\"See {IERC721-setApprovalForAll}.\"},\"supportsInterface(bytes4)\":{\"details\":\"See {IERC165-supportsInterface}.\"},\"symbol()\":{\"details\":\"See {IERC721Metadata-symbol}.\"},\"tokenURI(uint256)\":{\"details\":\"See {IERC721Metadata-tokenURI}.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"See 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}, { "kind": "number", "nodeType": "YulLiteral", "src": "2953:4:21", "type": "", "value": "0x24" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "2943:6:21" }, "nodeType": "YulFunctionCall", "src": "2943:15:21" }, "nodeType": "YulExpressionStatement", "src": "2943:15:21" } ] }, "name": "panic_error_0x41", "nodeType": "YulFunctionDefinition", "src": "2784:180:21" } ] }, "contents": "{\n\n function abi_decode_available_length_t_string_memory_ptr_fromMemory(src, length, end) -> array {\n array := allocateMemory(array_allocation_size_t_string_memory_ptr(length))\n mstore(array, length)\n let dst := add(array, 0x20)\n if gt(add(src, length), end) { revert(0, 0) }\n copy_memory_to_memory(src, dst, length)\n }\n\n // string\n function abi_decode_t_string_memory_ptr_fromMemory(offset, end) -> array {\n if iszero(slt(add(offset, 0x1f), end)) { revert(0, 0) }\n let length := mload(offset)\n array := abi_decode_available_length_t_string_memory_ptr_fromMemory(add(offset, 0x20), length, end)\n }\n\n function abi_decode_tuple_t_string_memory_ptrt_string_memory_ptr_fromMemory(headStart, dataEnd) -> value0, value1 {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n\n {\n\n let offset := mload(add(headStart, 0))\n if gt(offset, 0xffffffffffffffff) { revert(0, 0) }\n\n value0 := abi_decode_t_string_memory_ptr_fromMemory(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := mload(add(headStart, 32))\n if gt(offset, 0xffffffffffffffff) { revert(0, 0) }\n\n value1 := abi_decode_t_string_memory_ptr_fromMemory(add(headStart, offset), dataEnd)\n }\n\n }\n\n function allocateMemory(size) -> memPtr {\n memPtr := mload(64)\n let newFreePtr := add(memPtr, size)\n // protect against overflow\n if or(gt(newFreePtr, 0xffffffffffffffff), lt(newFreePtr, memPtr)) { panic_error_0x41() }\n mstore(64, newFreePtr)\n }\n\n function array_allocation_size_t_string_memory_ptr(length) -> size {\n // 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35408467139433450592217433187231851964531694900788300625387963629091585785856)\n mstore(4, 0x41)\n revert(0, 0x24)\n }\n\n}\n", "id": 21, "language": "Yul", "name": "#utility.yul" } ], "deployedGeneratedSources": [ { "ast": { "nodeType": "YulBlock", "src": "0:23428:21", "statements": [ { "body": { "nodeType": "YulBlock", "src": "90:259:21", "statements": [ { "nodeType": "YulAssignment", "src": "100:73:21", "value": { "arguments": [ { "arguments": [ { "name": "length", "nodeType": "YulIdentifier", "src": "165:6:21" } ], "functionName": { "name": "array_allocation_size_t_bytes_memory_ptr", "nodeType": "YulIdentifier", "src": "124:40:21" }, "nodeType": "YulFunctionCall", "src": "124:48:21" } ], "functionName": { "name": "allocateMemory", "nodeType": "YulIdentifier", "src": "109:14:21" }, "nodeType": "YulFunctionCall", "src": "109:64:21" }, "variableNames": [ { "name": "array", "nodeType": "YulIdentifier", "src": "100:5:21" } ] }, { "expression": { "arguments": [ { "name": "array", 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"src": "23366:2:21" }, "nodeType": "YulFunctionCall", "src": "23366:35:21" } ], "functionName": { "name": "iszero", "nodeType": "YulIdentifier", "src": "23359:6:21" }, "nodeType": "YulFunctionCall", "src": "23359:43:21" }, "nodeType": "YulIf", "src": "23356:2:21" } ] }, "name": "validator_revert_t_uint256", "nodeType": "YulFunctionDefinition", "parameters": [ { "name": "value", "nodeType": "YulTypedName", "src": "23339:5:21", "type": "" } ], "src": "23303:122:21" } ] }, "contents": "{\n\n function abi_decode_available_length_t_bytes_memory_ptr(src, length, end) -> array {\n array := allocateMemory(array_allocation_size_t_bytes_memory_ptr(length))\n mstore(array, length)\n let dst := add(array, 0x20)\n if gt(add(src, length), end) { revert(0, 0) }\n copy_calldata_to_memory(src, dst, length)\n }\n\n function abi_decode_t_address(offset, end) -> value {\n value := calldataload(offset)\n validator_revert_t_address(value)\n }\n\n function abi_decode_t_bool(offset, end) -> value {\n value := calldataload(offset)\n validator_revert_t_bool(value)\n }\n\n function abi_decode_t_bytes4(offset, end) -> value {\n value := calldataload(offset)\n validator_revert_t_bytes4(value)\n }\n\n function abi_decode_t_bytes4_fromMemory(offset, end) -> value {\n value := mload(offset)\n validator_revert_t_bytes4(value)\n }\n\n // bytes\n function abi_decode_t_bytes_memory_ptr(offset, end) -> array {\n if iszero(slt(add(offset, 0x1f), end)) { revert(0, 0) }\n let length := calldataload(offset)\n array := abi_decode_available_length_t_bytes_memory_ptr(add(offset, 0x20), length, end)\n }\n\n function abi_decode_t_uint256(offset, end) -> value {\n value := calldataload(offset)\n validator_revert_t_uint256(value)\n }\n\n function abi_decode_tuple_t_address(headStart, dataEnd) -> value0 {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_addresst_address(headStart, dataEnd) -> value0, value1 {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 32\n\n value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_addresst_addresst_uint256(headStart, dataEnd) -> value0, value1, value2 {\n if slt(sub(dataEnd, headStart), 96) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 32\n\n value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 64\n\n value2 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_addresst_addresst_uint256t_bytes_memory_ptr(headStart, dataEnd) -> value0, value1, value2, value3 {\n if slt(sub(dataEnd, headStart), 128) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 32\n\n value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 64\n\n value2 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := calldataload(add(headStart, 96))\n if gt(offset, 0xffffffffffffffff) { revert(0, 0) }\n\n value3 := abi_decode_t_bytes_memory_ptr(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_addresst_bool(headStart, dataEnd) -> value0, value1 {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 32\n\n value1 := abi_decode_t_bool(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_addresst_uint256(headStart, dataEnd) -> value0, value1 {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 32\n\n value1 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_bytes4(headStart, dataEnd) -> value0 {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_bytes4(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_bytes4_fromMemory(headStart, dataEnd) -> value0 {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_bytes4_fromMemory(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_uint256(headStart, dataEnd) -> value0 {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_encode_t_address_to_t_address_fromStack(value, pos) {\n mstore(pos, cleanup_t_address(value))\n }\n\n function abi_encode_t_bool_to_t_bool_fromStack(value, pos) {\n mstore(pos, cleanup_t_bool(value))\n }\n\n function abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_fromStack(value, pos) -> end {\n let length := array_length_t_bytes_memory_ptr(value)\n pos := array_storeLengthForEncoding_t_bytes_memory_ptr_fromStack(pos, length)\n copy_memory_to_memory(add(value, 0x20), pos, length)\n end := add(pos, round_up_to_mul_of_32(length))\n }\n\n function abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value, pos) -> end {\n let length := array_length_t_string_memory_ptr(value)\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length)\n copy_memory_to_memory(add(value, 0x20), pos, length)\n end := add(pos, round_up_to_mul_of_32(length))\n }\n\n function abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_nonPadded_inplace_fromStack(value, pos) -> end {\n let length := array_length_t_string_memory_ptr(value)\n pos := array_storeLengthForEncoding_t_string_memory_ptr_nonPadded_inplace_fromStack(pos, length)\n copy_memory_to_memory(add(value, 0x20), pos, length)\n end := add(pos, length)\n }\n\n function abi_encode_t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 50)\n\n mstore(add(pos, 0), \"ERC721: transfer to non ERC721Re\")\n\n mstore(add(pos, 32), \"ceiver implementer\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 36)\n\n mstore(add(pos, 0), \"ERC721: transfer to the zero add\")\n\n mstore(add(pos, 32), \"ress\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 25)\n\n mstore(add(pos, 0), \"ERC721: approve to caller\")\n\n end := add(pos, 32)\n }\n\n function abi_encode_t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 44)\n\n mstore(add(pos, 0), \"ERC721: operator query for nonex\")\n\n mstore(add(pos, 32), \"istent token\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_6d83cef3e0cb19b8320a9c5feb26b56bbb08f152a8e61b12eca3302d8d68b23d_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 56)\n\n mstore(add(pos, 0), \"ERC721: approve caller is not ow\")\n\n mstore(add(pos, 32), \"ner nor approved for all\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_7395d4d3901c50cdfcab223d072f9aa36241df5d883e62cbf147ee1b05a9e6ba_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 42)\n\n mstore(add(pos, 0), \"ERC721: balance query for the ze\")\n\n mstore(add(pos, 32), \"ro address\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_7481f3df2a424c0755a1ad2356614e9a5a358d461ea2eae1f89cb21cbad00397_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 41)\n\n mstore(add(pos, 0), \"ERC721: owner query for nonexist\")\n\n mstore(add(pos, 32), \"ent token\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_9291e0f44949204f2e9b40e6be090924979d6047b2365868f4e9f027722eb89d_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 44)\n\n mstore(add(pos, 0), \"ERC721: approved query for nonex\")\n\n mstore(add(pos, 32), \"istent token\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_a01073130a885d6c1c1af6ac75fc3b1c4f9403c235362962bbf528e2bd87d950_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 41)\n\n mstore(add(pos, 0), \"ERC721: transfer of token that i\")\n\n mstore(add(pos, 32), \"s not own\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_a2d45c0fba603d40d82d590051761ca952d1ab9d78cca6d0d464d7b6e961a9cb_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 47)\n\n mstore(add(pos, 0), \"ERC721Metadata: URI query for no\")\n\n mstore(add(pos, 32), \"nexistent token\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 33)\n\n mstore(add(pos, 0), \"ERC721: approval to current owne\")\n\n mstore(add(pos, 32), \"r\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_c8682f3ad98807db59a6ec6bb812b72fed0a66e3150fa8239699ee83885247f2_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 49)\n\n mstore(add(pos, 0), \"ERC721: transfer caller is not o\")\n\n mstore(add(pos, 32), \"wner nor approved\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_uint256_to_t_uint256_fromStack(value, pos) {\n mstore(pos, cleanup_t_uint256(value))\n }\n\n function abi_encode_tuple_packed_t_string_memory_ptr_t_string_memory_ptr__to_t_string_memory_ptr_t_string_memory_ptr__nonPadded_inplace_fromStack_reversed(pos , value1, value0) -> end {\n\n pos := abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_nonPadded_inplace_fromStack(value0, pos)\n\n pos := abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_nonPadded_inplace_fromStack(value1, pos)\n\n end := pos\n }\n\n function abi_encode_tuple_t_address__to_t_address__fromStack_reversed(headStart , value0) -> tail {\n tail := add(headStart, 32)\n\n abi_encode_t_address_to_t_address_fromStack(value0, add(headStart, 0))\n\n }\n\n function abi_encode_tuple_t_address_t_address_t_uint256_t_bytes_memory_ptr__to_t_address_t_address_t_uint256_t_bytes_memory_ptr__fromStack_reversed(headStart , value3, value2, value1, value0) -> tail {\n tail := add(headStart, 128)\n\n abi_encode_t_address_to_t_address_fromStack(value0, add(headStart, 0))\n\n abi_encode_t_address_to_t_address_fromStack(value1, add(headStart, 32))\n\n abi_encode_t_uint256_to_t_uint256_fromStack(value2, add(headStart, 64))\n\n mstore(add(headStart, 96), sub(tail, headStart))\n tail := abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_fromStack(value3, tail)\n\n }\n\n function abi_encode_tuple_t_bool__to_t_bool__fromStack_reversed(headStart , value0) -> tail {\n tail := add(headStart, 32)\n\n abi_encode_t_bool_to_t_bool_fromStack(value0, add(headStart, 0))\n\n }\n\n function abi_encode_tuple_t_string_memory_ptr__to_t_string_memory_ptr__fromStack_reversed(headStart , value0) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value0, tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_6d83cef3e0cb19b8320a9c5feb26b56bbb08f152a8e61b12eca3302d8d68b23d__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_6d83cef3e0cb19b8320a9c5feb26b56bbb08f152a8e61b12eca3302d8d68b23d_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_7395d4d3901c50cdfcab223d072f9aa36241df5d883e62cbf147ee1b05a9e6ba__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_7395d4d3901c50cdfcab223d072f9aa36241df5d883e62cbf147ee1b05a9e6ba_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_7481f3df2a424c0755a1ad2356614e9a5a358d461ea2eae1f89cb21cbad00397__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_7481f3df2a424c0755a1ad2356614e9a5a358d461ea2eae1f89cb21cbad00397_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_9291e0f44949204f2e9b40e6be090924979d6047b2365868f4e9f027722eb89d__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_9291e0f44949204f2e9b40e6be090924979d6047b2365868f4e9f027722eb89d_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_a01073130a885d6c1c1af6ac75fc3b1c4f9403c235362962bbf528e2bd87d950__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_a01073130a885d6c1c1af6ac75fc3b1c4f9403c235362962bbf528e2bd87d950_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_a2d45c0fba603d40d82d590051761ca952d1ab9d78cca6d0d464d7b6e961a9cb__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_a2d45c0fba603d40d82d590051761ca952d1ab9d78cca6d0d464d7b6e961a9cb_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_c8682f3ad98807db59a6ec6bb812b72fed0a66e3150fa8239699ee83885247f2__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_c8682f3ad98807db59a6ec6bb812b72fed0a66e3150fa8239699ee83885247f2_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart , value0) -> tail {\n tail := add(headStart, 32)\n\n abi_encode_t_uint256_to_t_uint256_fromStack(value0, add(headStart, 0))\n\n }\n\n function allocateMemory(size) -> memPtr {\n memPtr := mload(64)\n let newFreePtr := add(memPtr, size)\n // protect against overflow\n if or(gt(newFreePtr, 0xffffffffffffffff), lt(newFreePtr, memPtr)) { panic_error_0x41() }\n mstore(64, newFreePtr)\n }\n\n function array_allocation_size_t_bytes_memory_ptr(length) -> size {\n // Make sure we can allocate memory without overflow\n if gt(length, 0xffffffffffffffff) { panic_error_0x41() }\n\n // round up\n size := and(add(length, 0x1f), not(0x1f))\n\n // add length slot\n size := add(size, 0x20)\n\n }\n\n function array_length_t_bytes_memory_ptr(value) -> length {\n\n length := mload(value)\n\n }\n\n function array_length_t_string_memory_ptr(value) -> length {\n\n length := mload(value)\n\n }\n\n function array_storeLengthForEncoding_t_bytes_memory_ptr_fromStack(pos, length) -> updated_pos {\n mstore(pos, length)\n updated_pos := add(pos, 0x20)\n }\n\n function array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length) -> updated_pos {\n mstore(pos, length)\n updated_pos := add(pos, 0x20)\n }\n\n function array_storeLengthForEncoding_t_string_memory_ptr_nonPadded_inplace_fromStack(pos, length) -> updated_pos {\n updated_pos := pos\n }\n\n function checked_add_t_uint256(x, y) -> sum {\n x := cleanup_t_uint256(x)\n y := cleanup_t_uint256(y)\n\n // overflow, if x > (maxValue - y)\n if gt(x, sub(0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, y)) { panic_error_0x11() }\n\n sum := add(x, y)\n }\n\n function checked_div_t_uint256(x, y) -> r {\n x := cleanup_t_uint256(x)\n y := cleanup_t_uint256(y)\n if iszero(y) { panic_error_0x12() }\n\n r := div(x, y)\n }\n\n function checked_sub_t_uint256(x, y) -> diff {\n x := cleanup_t_uint256(x)\n y := cleanup_t_uint256(y)\n\n if lt(x, y) { panic_error_0x11() }\n\n diff := sub(x, y)\n }\n\n function cleanup_t_address(value) -> cleaned {\n cleaned := cleanup_t_uint160(value)\n }\n\n function cleanup_t_bool(value) -> cleaned {\n cleaned := iszero(iszero(value))\n }\n\n function cleanup_t_bytes4(value) -> cleaned {\n cleaned := and(value, 0xffffffff00000000000000000000000000000000000000000000000000000000)\n }\n\n function cleanup_t_uint160(value) -> cleaned {\n cleaned := and(value, 0xffffffffffffffffffffffffffffffffffffffff)\n }\n\n function cleanup_t_uint256(value) -> cleaned {\n cleaned := value\n }\n\n function copy_calldata_to_memory(src, dst, length) {\n calldatacopy(dst, src, length)\n // clear end\n mstore(add(dst, length), 0)\n }\n\n function copy_memory_to_memory(src, dst, length) {\n let i := 0\n for { } lt(i, length) { i := add(i, 32) }\n {\n mstore(add(dst, i), mload(add(src, i)))\n }\n if gt(i, length)\n {\n // clear end\n mstore(add(dst, length), 0)\n }\n }\n\n function extract_byte_array_length(data) -> length {\n length := div(data, 2)\n let outOfPlaceEncoding := and(data, 1)\n if iszero(outOfPlaceEncoding) {\n length := and(length, 0x7f)\n }\n\n if eq(outOfPlaceEncoding, lt(length, 32)) {\n panic_error_0x22()\n }\n }\n\n function increment_t_uint256(value) -> ret {\n value := cleanup_t_uint256(value)\n if eq(value, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) { panic_error_0x11() }\n ret := add(value, 1)\n }\n\n function mod_t_uint256(x, y) -> r {\n x := cleanup_t_uint256(x)\n y := cleanup_t_uint256(y)\n if iszero(y) { panic_error_0x12() }\n r := mod(x, y)\n }\n\n function panic_error_0x11() {\n mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n mstore(4, 0x11)\n revert(0, 0x24)\n }\n\n function panic_error_0x12() {\n mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n mstore(4, 0x12)\n revert(0, 0x24)\n }\n\n function panic_error_0x22() {\n mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n mstore(4, 0x22)\n revert(0, 0x24)\n }\n\n function panic_error_0x41() {\n mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n mstore(4, 0x41)\n revert(0, 0x24)\n }\n\n function round_up_to_mul_of_32(value) -> result {\n result := and(add(value, 31), not(31))\n }\n\n function validator_revert_t_address(value) {\n if iszero(eq(value, cleanup_t_address(value))) { revert(0, 0) }\n }\n\n function validator_revert_t_bool(value) {\n if iszero(eq(value, cleanup_t_bool(value))) { revert(0, 0) }\n }\n\n function validator_revert_t_bytes4(value) {\n if iszero(eq(value, cleanup_t_bytes4(value))) { revert(0, 0) }\n }\n\n function validator_revert_t_uint256(value) {\n if iszero(eq(value, cleanup_t_uint256(value))) { revert(0, 0) }\n }\n\n}\n", "id": 21, "language": "Yul", "name": "#utility.yul" } ], "sourceMap": 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"source": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"./IERC721.sol\";\nimport \"./IERC721Receiver.sol\";\nimport \"./extensions/IERC721Metadata.sol\";\nimport \"../../utils/Address.sol\";\nimport \"../../utils/Context.sol\";\nimport \"../../utils/Strings.sol\";\nimport \"../../utils/introspection/ERC165.sol\";\n\n/**\n * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n * the Metadata extension, but not including the Enumerable extension, which is available separately as\n * {ERC721Enumerable}.\n */\ncontract ERC721 is Context, ERC165, IERC721, IERC721Metadata {\n using Address for address;\n using Strings for uint256;\n\n // Token name\n string private _name;\n\n // Token symbol\n string private _symbol;\n\n // Mapping from token ID to owner address\n mapping(uint256 => address) private _owners;\n\n // Mapping owner address to token count\n mapping(address => uint256) private _balances;\n\n // Mapping from token ID to approved address\n mapping(uint256 => address) private _tokenApprovals;\n\n // Mapping from owner to operator approvals\n mapping(address => mapping(address => bool)) private _operatorApprovals;\n\n /**\n * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.\n */\n constructor(string memory name_, string memory symbol_) {\n _name = name_;\n _symbol = symbol_;\n }\n\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {\n return\n interfaceId == type(IERC721).interfaceId ||\n interfaceId == type(IERC721Metadata).interfaceId ||\n super.supportsInterface(interfaceId);\n }\n\n /**\n * @dev See {IERC721-balanceOf}.\n */\n function balanceOf(address owner) public view virtual override returns (uint256) {\n require(owner != address(0), \"ERC721: balance query for the zero address\");\n return _balances[owner];\n }\n\n /**\n * @dev See {IERC721-ownerOf}.\n */\n function ownerOf(uint256 tokenId) public view virtual override returns (address) {\n address owner = _owners[tokenId];\n require(owner != address(0), \"ERC721: owner query for nonexistent token\");\n return owner;\n }\n\n /**\n * @dev See {IERC721Metadata-name}.\n */\n function name() public view virtual override returns (string memory) {\n return _name;\n }\n\n /**\n * @dev See {IERC721Metadata-symbol}.\n */\n function symbol() public view virtual override returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev See {IERC721Metadata-tokenURI}.\n */\n function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {\n require(_exists(tokenId), \"ERC721Metadata: URI query for nonexistent token\");\n\n string memory baseURI = _baseURI();\n return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : \"\";\n }\n\n /**\n * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\n * token will be the concatenation of the `baseURI` and the `tokenId`. Empty\n * by default, can be overriden in child contracts.\n */\n function _baseURI() internal view virtual returns (string memory) {\n return \"\";\n }\n\n /**\n * @dev See {IERC721-approve}.\n */\n function approve(address to, uint256 tokenId) public virtual override {\n address owner = ERC721.ownerOf(tokenId);\n require(to != owner, \"ERC721: approval to current owner\");\n\n require(\n _msgSender() == owner || isApprovedForAll(owner, _msgSender()),\n \"ERC721: approve caller is not owner nor approved for all\"\n );\n\n _approve(to, tokenId);\n }\n\n /**\n * @dev See {IERC721-getApproved}.\n */\n function getApproved(uint256 tokenId) public view virtual override returns (address) {\n require(_exists(tokenId), \"ERC721: approved query for nonexistent token\");\n\n return _tokenApprovals[tokenId];\n }\n\n /**\n * @dev See {IERC721-setApprovalForAll}.\n */\n function setApprovalForAll(address operator, bool approved) public virtual override {\n require(operator != _msgSender(), \"ERC721: approve to caller\");\n\n _operatorApprovals[_msgSender()][operator] = approved;\n emit ApprovalForAll(_msgSender(), operator, approved);\n }\n\n /**\n * @dev See {IERC721-isApprovedForAll}.\n */\n function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {\n return _operatorApprovals[owner][operator];\n }\n\n /**\n * @dev See {IERC721-transferFrom}.\n */\n function transferFrom(\n address from,\n address to,\n uint256 tokenId\n ) public virtual override {\n //solhint-disable-next-line max-line-length\n require(_isApprovedOrOwner(_msgSender(), tokenId), \"ERC721: transfer caller is not owner nor approved\");\n\n _transfer(from, to, tokenId);\n }\n\n /**\n * @dev See {IERC721-safeTransferFrom}.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId\n ) public virtual override {\n safeTransferFrom(from, to, tokenId, \"\");\n }\n\n /**\n * @dev See {IERC721-safeTransferFrom}.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) public virtual override {\n require(_isApprovedOrOwner(_msgSender(), tokenId), \"ERC721: transfer caller is not owner nor approved\");\n _safeTransfer(from, to, tokenId, _data);\n }\n\n /**\n * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n *\n * `_data` is additional data, it has no specified format and it is sent in call to `to`.\n *\n * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.\n * implement alternative mechanisms to perform token transfer, such as signature-based.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must exist and be owned by `from`.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function _safeTransfer(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) internal virtual {\n _transfer(from, to, tokenId);\n require(_checkOnERC721Received(from, to, tokenId, _data), \"ERC721: transfer to non ERC721Receiver implementer\");\n }\n\n /**\n * @dev Returns whether `tokenId` exists.\n *\n * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\n *\n * Tokens start existing when they are minted (`_mint`),\n * and stop existing when they are burned (`_burn`).\n */\n function _exists(uint256 tokenId) internal view virtual returns (bool) {\n return _owners[tokenId] != address(0);\n }\n\n /**\n * @dev Returns whether `spender` is allowed to manage `tokenId`.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n */\n function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {\n require(_exists(tokenId), \"ERC721: operator query for nonexistent token\");\n address owner = ERC721.ownerOf(tokenId);\n return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));\n }\n\n /**\n * @dev Safely mints `tokenId` and transfers it to `to`.\n *\n * Requirements:\n *\n * - `tokenId` must not exist.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function _safeMint(address to, uint256 tokenId) internal virtual {\n _safeMint(to, tokenId, \"\");\n }\n\n /**\n * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is\n * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.\n */\n function _safeMint(\n address to,\n uint256 tokenId,\n bytes memory _data\n ) internal virtual {\n _mint(to, tokenId);\n require(\n _checkOnERC721Received(address(0), to, tokenId, _data),\n \"ERC721: transfer to non ERC721Receiver implementer\"\n );\n }\n\n /**\n * @dev Mints `tokenId` and transfers it to `to`.\n *\n * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible\n *\n * Requirements:\n *\n * - `tokenId` must not exist.\n * - `to` cannot be the zero address.\n *\n * Emits a {Transfer} event.\n */\n function _mint(address to, uint256 tokenId) internal virtual {\n require(to != address(0), \"ERC721: mint to the zero address\");\n require(!_exists(tokenId), \"ERC721: token already minted\");\n\n _beforeTokenTransfer(address(0), to, tokenId);\n\n _balances[to] += 1;\n _owners[tokenId] = to;\n\n emit Transfer(address(0), to, tokenId);\n }\n\n /**\n * @dev Destroys `tokenId`.\n * The approval is cleared when the token is burned.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n *\n * Emits a {Transfer} event.\n */\n function _burn(uint256 tokenId) internal virtual {\n address owner = ERC721.ownerOf(tokenId);\n\n _beforeTokenTransfer(owner, address(0), tokenId);\n\n // Clear approvals\n _approve(address(0), tokenId);\n\n _balances[owner] -= 1;\n delete _owners[tokenId];\n\n emit Transfer(owner, address(0), tokenId);\n }\n\n /**\n * @dev Transfers `tokenId` from `from` to `to`.\n * As opposed to {transferFrom}, this imposes no restrictions on msg.sender.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n * - `tokenId` token must be owned by `from`.\n *\n * Emits a {Transfer} event.\n */\n function _transfer(\n address from,\n address to,\n uint256 tokenId\n ) internal virtual {\n require(ERC721.ownerOf(tokenId) == from, \"ERC721: transfer of token that is not own\");\n require(to != address(0), \"ERC721: transfer to the zero address\");\n\n _beforeTokenTransfer(from, to, tokenId);\n\n // Clear approvals from the previous owner\n _approve(address(0), tokenId);\n\n _balances[from] -= 1;\n _balances[to] += 1;\n _owners[tokenId] = to;\n\n emit Transfer(from, to, tokenId);\n }\n\n /**\n * @dev Approve `to` to operate on `tokenId`\n *\n * Emits a {Approval} event.\n */\n function _approve(address to, uint256 tokenId) internal virtual {\n _tokenApprovals[tokenId] = to;\n emit Approval(ERC721.ownerOf(tokenId), to, tokenId);\n }\n\n /**\n * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.\n * The call is not executed if the target address is not a contract.\n *\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(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) private returns (bool) {\n if (to.isContract()) {\n try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {\n return retval == IERC721Receiver.onERC721Received.selector;\n } catch (bytes memory reason) {\n if (reason.length == 0) {\n revert(\"ERC721: transfer to non ERC721Receiver implementer\");\n } else {\n assembly {\n revert(add(32, reason), mload(reason))\n }\n }\n }\n } else {\n return true;\n }\n }\n\n /**\n * @dev Hook that is called before any token transfer. This includes minting\n * and burning.\n *\n * Calling conditions:\n *\n * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be\n * transferred to `to`.\n * - When `from` is zero, `tokenId` will be minted for `to`.\n * - When `to` is zero, ``from``'s `tokenId` will be burned.\n * - `from` and `to` are never both zero.\n *\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n */\n function _beforeTokenTransfer(\n address from,\n address to,\n uint256 tokenId\n ) internal virtual {}\n}\n", "sourcePath": "@openzeppelin\\contracts\\token\\ERC721\\ERC721.sol", "ast": { "absolutePath": "@openzeppelin/contracts/token/ERC721/ERC721.sol", "exportedSymbols": { "Address": [ 1807 ], "Context": [ 1829 ], "ERC165": [ 2130 ], "ERC721": [ 1221 ], "IERC165": [ 2142 ], "IERC721": [ 1337 ], "IERC721Metadata": [ 1510 ], "IERC721Receiver": [ 1355 ], "Strings": [ 2106 ] }, "id": 1222, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 407, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "33:23:3" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721.sol", "file": "./IERC721.sol", "id": 408, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1338, "src": "58:23:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol", "file": "./IERC721Receiver.sol", "id": 409, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1356, "src": "82:31:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol", "file": "./extensions/IERC721Metadata.sol", "id": 410, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1511, "src": "114:42:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Address.sol", "file": "../../utils/Address.sol", "id": 411, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1808, "src": "157:33:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Context.sol", "file": "../../utils/Context.sol", "id": 412, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1830, "src": "191:33:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Strings.sol", "file": "../../utils/Strings.sol", "id": 413, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 2107, "src": "225:33:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/introspection/ERC165.sol", "file": "../../utils/introspection/ERC165.sol", "id": 414, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 2131, "src": "259:46:3", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 416, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 1829, "src": "573:7:3" }, "id": 417, "nodeType": "InheritanceSpecifier", "src": "573:7:3" }, { "baseName": { "id": 418, "name": "ERC165", "nodeType": "IdentifierPath", "referencedDeclaration": 2130, "src": "582:6:3" }, "id": 419, "nodeType": "InheritanceSpecifier", "src": "582:6:3" }, { "baseName": { "id": 420, "name": "IERC721", "nodeType": "IdentifierPath", "referencedDeclaration": 1337, "src": "590:7:3" }, "id": 421, "nodeType": "InheritanceSpecifier", "src": "590:7:3" }, { "baseName": { "id": 422, "name": "IERC721Metadata", "nodeType": "IdentifierPath", "referencedDeclaration": 1510, "src": "599:15:3" }, "id": 423, "nodeType": "InheritanceSpecifier", "src": "599:15:3" } ], "contractDependencies": [ 1337, 1510, 1829, 2130, 2142 ], "contractKind": "contract", "documentation": { "id": 415, "nodeType": "StructuredDocumentation", "src": "307:246:3", "text": " @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n the Metadata extension, but not including the Enumerable extension, which is available separately as\n {ERC721Enumerable}." }, "fullyImplemented": true, "id": 1221, "linearizedBaseContracts": [ 1221, 1510, 1337, 2130, 2142, 1829 ], "name": "ERC721", "nodeType": "ContractDefinition", "nodes": [ { "id": 426, "libraryName": { "id": 424, "name": "Address", "nodeType": "IdentifierPath", "referencedDeclaration": 1807, "src": "627:7:3" }, "nodeType": "UsingForDirective", "src": "621:26:3", "typeName": { "id": 425, "name": "address", "nodeType": "ElementaryTypeName", "src": "639:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, { "id": 429, "libraryName": { "id": 427, "name": "Strings", "nodeType": "IdentifierPath", "referencedDeclaration": 2106, "src": "658:7:3" }, "nodeType": "UsingForDirective", "src": "652:26:3", "typeName": { "id": 428, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "670:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "constant": false, "id": 431, "mutability": "mutable", "name": "_name", "nodeType": "VariableDeclaration", "scope": 1221, "src": "702:20:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 430, "name": "string", "nodeType": "ElementaryTypeName", "src": "702:6:3", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 433, "mutability": "mutable", "name": "_symbol", "nodeType": "VariableDeclaration", "scope": 1221, "src": "749:22:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 432, "name": "string", "nodeType": "ElementaryTypeName", "src": "749:6:3", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 437, "mutability": "mutable", "name": "_owners", "nodeType": "VariableDeclaration", "scope": 1221, "src": "824:43:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "typeName": { "id": 436, "keyType": { "id": 434, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "832:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Mapping", "src": "824:27:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "valueType": { "id": 435, "name": "address", "nodeType": "ElementaryTypeName", "src": "843:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "visibility": "private" }, { "constant": false, "id": 441, 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1221, "src": "1019:51:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "typeName": { "id": 444, "keyType": { "id": 442, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1027:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Mapping", "src": "1019:27:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "valueType": { "id": 443, "name": "address", "nodeType": "ElementaryTypeName", "src": "1038:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "visibility": "private" }, { "constant": false, "id": 451, "mutability": "mutable", "name": "_operatorApprovals", "nodeType": "VariableDeclaration", "scope": 1221, "src": "1125:71:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" }, "typeName": { "id": 450, "keyType": { "id": 446, "name": "address", "nodeType": "ElementaryTypeName", "src": "1133:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1125:44:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" }, "valueType": { "id": 449, "keyType": { "id": 447, "name": "address", "nodeType": "ElementaryTypeName", "src": "1152:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1144:24:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" }, "valueType": { "id": 448, "name": "bool", "nodeType": "ElementaryTypeName", "src": "1163:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } } }, "visibility": "private" }, { "body": { "id": 467, "nodeType": "Block", "src": "1372:57:3", "statements": [ { "expression": { "id": 461, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 459, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 431, "src": "1382:5:3", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 460, "name": "name_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 454, "src": "1390:5:3", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "1382:13:3", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 462, "nodeType": "ExpressionStatement", "src": "1382:13:3" }, { "expression": { "id": 465, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 463, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 433, "src": "1405:7:3", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 464, "name": "symbol_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 456, "src": "1415:7:3", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "1405:17:3", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 466, "nodeType": "ExpressionStatement", "src": "1405:17:3" } ] }, "documentation": { "id": 452, "nodeType": "StructuredDocumentation", "src": "1203:108:3", "text": " @dev Initializes the contract by setting a `name` and a `symbol` to the token collection." }, "id": 468, "implemented": true, "kind": "constructor", "modifiers": [], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 457, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 454, "mutability": "mutable", "name": "name_", "nodeType": "VariableDeclaration", "scope": 468, "src": "1328:19:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 453, "name": "string", "nodeType": "ElementaryTypeName", "src": "1328:6:3", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 456, "mutability": "mutable", "name": "symbol_", "nodeType": "VariableDeclaration", "scope": 468, "src": "1349:21:3", 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"rightExpression": { "commonType": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "id": 490, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 485, "name": "interfaceId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 471, "src": "1689:11:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "expression": { "arguments": [ { "id": 487, "name": "IERC721Metadata", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1510, "src": "1709:15:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Metadata_$1510_$", "typeString": "type(contract IERC721Metadata)" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_type$_t_contract$_IERC721Metadata_$1510_$", "typeString": "type(contract IERC721Metadata)" } ], "id": 486, "name": "type", 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"src": "2973:93:3" } ] }, "documentation": { "id": 572, "nodeType": "StructuredDocumentation", "src": "2684:55:3", "text": " @dev See {IERC721Metadata-tokenURI}." }, "functionSelector": "c87b56dd", "id": 613, "implemented": true, "kind": "function", "modifiers": [], "name": "tokenURI", "nodeType": "FunctionDefinition", "overrides": { "id": 576, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2799:8:3" }, "parameters": { "id": 575, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 574, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 613, "src": "2762:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 573, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2762:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2761:17:3" }, 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"typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" }, "value": "" }, "functionReturnParameters": 618, "id": 620, "nodeType": "Return", "src": "3390:9:3" } ] }, "documentation": { "id": 614, "nodeType": "StructuredDocumentation", "src": "3079:230:3", "text": " @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\n token will be the concatenation of the `baseURI` and the `tokenId`. Empty\n by default, can be overriden in child contracts." }, "id": 622, "implemented": true, "kind": "function", "modifiers": [], "name": "_baseURI", "nodeType": "FunctionDefinition", "parameters": { "id": 615, "nodeType": "ParameterList", "parameters": [], "src": "3331:2:3" }, "returnParameters": { "id": 618, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 617, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 622, "src": "3365:13:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 616, "name": "string", "nodeType": "ElementaryTypeName", "src": "3365:6:3", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "3364:15:3" }, "scope": 1221, "src": "3314:92:3", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "baseFunctions": [ 1298 ], "body": { "id": 664, "nodeType": "Block", "src": "3533:331:3", "statements": [ { "assignments": [ 632 ], "declarations": [ { "constant": false, "id": 632, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 664, "src": "3543:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 631, "name": "address", "nodeType": "ElementaryTypeName", "src": "3543:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 637, "initialValue": { "arguments": [ { "id": 635, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 627, "src": "3574:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 633, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1221, "src": "3559:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$1221_$", "typeString": "type(contract ERC721)" } }, "id": 634, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 551, "src": "3559:14:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 636, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3559:23:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "3543:39:3" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 641, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 639, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 625, "src": "3600:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "id": 640, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 632, "src": "3606:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3600:11:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a20617070726f76616c20746f2063757272656e74206f776e6572", "id": 642, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3613:35:3", "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": 638, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "3592:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 643, "isConstant": false, "isLValue": false, "isPure": false, "kind": 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returns (address)" } }, "id": 647, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3681:12:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 648, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 632, "src": "3697:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3681:21:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "arguments": [ { "id": 651, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 632, "src": "3723:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [], "expression": { "argumentTypes": [], "id": 652, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1819, "src": "3730:10:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 653, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3730:12:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 650, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 738, "src": "3706:16:3", "typeDescriptions": { "typeIdentifier": 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all\"" }, "value": "ERC721: approve caller is not owner nor approved for all" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_6d83cef3e0cb19b8320a9c5feb26b56bbb08f152a8e61b12eca3302d8d68b23d", "typeString": "literal_string \"ERC721: approve caller is not owner nor approved for all\"" } ], "id": 645, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "3660:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 657, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3660:165:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 658, 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"isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6801:111:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 841, "nodeType": "ExpressionStatement", "src": "6801:111:3" } ] }, "documentation": { "id": 815, "nodeType": "StructuredDocumentation", "src": "5756:851:3", "text": " @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n are aware of the ERC721 protocol to prevent tokens from being forever locked.\n `_data` is additional data, it has no specified format and it is sent in call to `to`.\n This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.\n implement alternative mechanisms to perform token transfer, such as signature-based.\n Requirements:\n - `from` cannot be the zero address.\n - `to` cannot be the zero address.\n - `tokenId` token must exist and be owned by `from`.\n - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n Emits a {Transfer} event." }, "id": 843, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeTransfer", "nodeType": "FunctionDefinition", "parameters": { "id": 824, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 817, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 843, "src": "6644:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 816, "name": "address", "nodeType": "ElementaryTypeName", "src": "6644:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 819, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 843, "src": "6666:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 818, "name": "address", "nodeType": "ElementaryTypeName", "src": "6666:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 821, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 843, "src": "6686:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 820, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6686:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 823, "mutability": "mutable", "name": "_data", "nodeType": "VariableDeclaration", "scope": 843, "src": "6711:18:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 822, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "6711:5:3", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "6634:101:3" }, "returnParameters": { "id": 825, "nodeType": "ParameterList", "parameters": [], "src": "6753:0:3" }, "scope": 1221, "src": "6612:307:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 860, "nodeType": "Block", "src": "7293:54:3", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 858, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "baseExpression": { "id": 851, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 437, "src": "7310:7:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 853, "indexExpression": { "id": 852, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 846, "src": "7318:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7310:16:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 856, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7338:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 855, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7330:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 854, "name": "address", "nodeType": "ElementaryTypeName", "src": "7330:7:3", "typeDescriptions": {} } }, "id": 857, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7330:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7310:30:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 850, "id": 859, "nodeType": "Return", "src": "7303:37:3" } ] }, "documentation": { "id": 844, "nodeType": "StructuredDocumentation", "src": "6925:292:3", "text": " @dev Returns whether `tokenId` exists.\n Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\n Tokens start existing when they are minted (`_mint`),\n and stop existing when they are burned (`_burn`)." }, "id": 861, "implemented": true, "kind": "function", "modifiers": [], "name": "_exists", "nodeType": "FunctionDefinition", "parameters": { "id": 847, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 846, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 861, "src": "7239:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 845, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7239:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7238:17:3" }, "returnParameters": { "id": 850, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 849, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 861, "src": "7287:4:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 848, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7287:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7286:6:3" }, "scope": 1221, "src": "7222:125:3", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 901, "nodeType": "Block", "src": "7604:245:3", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "id": 873, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 866, "src": "7630:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 872, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 861, "src": "7622:7:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 874, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7622:16:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a206f70657261746f7220717565727920666f72206e6f6e6578697374656e7420746f6b656e", "id": 875, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7640:46:3", "typeDescriptions": { "typeIdentifier": "t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c", "typeString": "literal_string \"ERC721: operator query for nonexistent token\"" }, "value": "ERC721: operator query for nonexistent token" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c", "typeString": "literal_string \"ERC721: operator query for nonexistent token\"" } ], "id": 871, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "7614:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 876, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7614:73:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 877, "nodeType": "ExpressionStatement", "src": "7614:73:3" }, { "assignments": [ 879 ], "declarations": [ { "constant": false, "id": 879, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 901, "src": "7697:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 878, "name": "address", "nodeType": "ElementaryTypeName", "src": "7697:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 884, "initialValue": { "arguments": [ { "id": 882, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 866, "src": "7728:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 880, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1221, "src": "7713:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$1221_$", "typeString": "type(contract ERC721)" } }, "id": 881, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 551, "src": "7713:14:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 883, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7713:23:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7697:39:3" }, { "expression": { "components": [ { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 898, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 893, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 887, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 885, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 864, "src": "7754:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 886, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 879, "src": "7765:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7754:16:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 892, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 889, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 866, "src": "7786:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 888, "name": "getApproved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 686, "src": "7774:11:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 890, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7774:20:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 891, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 864, "src": "7798:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7774:31:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7754:51:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "arguments": [ { "id": 895, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 879, "src": "7826:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 896, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 864, "src": "7833:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 894, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 738, "src": "7809:16:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 897, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7809:32:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7754:87:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 899, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "7753:89:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 870, "id": 900, "nodeType": "Return", "src": "7746:96:3" } ] }, "documentation": { "id": 862, "nodeType": "StructuredDocumentation", "src": "7353:147:3", "text": " @dev Returns whether `spender` is allowed to manage `tokenId`.\n Requirements:\n - `tokenId` must exist." }, "id": 902, "implemented": true, "kind": "function", "modifiers": [], "name": "_isApprovedOrOwner", "nodeType": "FunctionDefinition", "parameters": { "id": 867, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 864, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 902, "src": "7533:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 863, "name": "address", "nodeType": "ElementaryTypeName", "src": "7533:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 866, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 902, "src": "7550:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 865, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7550:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7532:34:3" }, "returnParameters": { "id": 870, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 869, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 902, "src": "7598:4:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 868, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7598:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7597:6:3" }, "scope": 1221, "src": "7505:344:3", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 916, "nodeType": "Block", "src": "8244:43:3", "statements": [ { "expression": { "arguments": [ { "id": 911, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 905, "src": "8264:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 912, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 907, "src": "8268:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "", "id": 913, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8277:2:3", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" }, "value": "" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" } ], "id": 910, "name": "_safeMint", "nodeType": "Identifier", "overloadedDeclarations": [ 917, 946 ], "referencedDeclaration": 946, "src": "8254:9:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,uint256,bytes memory)" } }, "id": 914, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8254:26:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 915, "nodeType": "ExpressionStatement", "src": "8254:26:3" } ] }, "documentation": { "id": 903, "nodeType": "StructuredDocumentation", "src": "7855:319:3", "text": " @dev Safely mints `tokenId` and transfers it to `to`.\n Requirements:\n - `tokenId` must not exist.\n - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n Emits a {Transfer} event." }, "id": 917, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nodeType": "FunctionDefinition", "parameters": { "id": 908, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 905, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 917, "src": "8198:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 904, "name": "address", "nodeType": "ElementaryTypeName", "src": "8198:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 907, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 917, "src": "8210:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 906, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8210:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8197:29:3" }, "returnParameters": { "id": 909, "nodeType": "ParameterList", "parameters": [], "src": "8244:0:3" }, "scope": 1221, "src": "8179:108:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 945, "nodeType": "Block", "src": "8623:196:3", "statements": [ { "expression": { "arguments": [ { "id": 928, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 920, "src": "8639:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 929, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 922, "src": "8643:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 927, "name": "_mint", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1003, "src": "8633:5:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 930, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8633:18:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 931, "nodeType": "ExpressionStatement", "src": "8633:18:3" }, { "expression": { "arguments": [ { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 936, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8713:1:3", "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": 935, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8705:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 934, "name": "address", "nodeType": "ElementaryTypeName", "src": "8705:7:3", "typeDescriptions": {} } }, "id": 937, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8705:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 938, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 920, "src": "8717:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 939, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 922, "src": "8721:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 940, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 924, "src": "8730:5:3", "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": 933, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1209, "src": "8682:22:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 941, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8682:54:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 942, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8750:52:3", "typeDescriptions": { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" }, "value": "ERC721: transfer to non ERC721Receiver implementer" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" } ], "id": 932, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "8661:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 943, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8661:151:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 944, "nodeType": "ExpressionStatement", "src": "8661:151:3" } ] }, "documentation": { "id": 918, "nodeType": "StructuredDocumentation", "src": "8293:210:3", "text": " @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is\n forwarded in {IERC721Receiver-onERC721Received} to contract recipients." }, "id": 946, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nodeType": "FunctionDefinition", "parameters": { "id": 925, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 920, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 946, "src": "8536:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 919, "name": "address", "nodeType": "ElementaryTypeName", "src": "8536:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 922, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 946, "src": "8556:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 921, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8556:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 924, "mutability": "mutable", "name": "_data", "nodeType": "VariableDeclaration", "scope": 946, "src": "8581:18:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 923, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "8581:5:3", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "8526:79:3" }, "returnParameters": { "id": 926, "nodeType": "ParameterList", "parameters": [], "src": "8623:0:3" }, "scope": 1221, "src": "8508:311:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1002, "nodeType": "Block", "src": "9202:311:3", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 960, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 955, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9220:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 958, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9234:1:3", "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": 957, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9226:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 956, "name": "address", "nodeType": "ElementaryTypeName", "src": "9226:7:3", "typeDescriptions": {} } }, "id": 959, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9226:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9220:16:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a206d696e7420746f20746865207a65726f2061646472657373", "id": 961, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9238:34:3", "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": 954, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9212:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 962, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9212:61:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 963, "nodeType": "ExpressionStatement", "src": "9212:61:3" }, { "expression": { "arguments": [ { "id": 968, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "9291:17:3", "subExpression": { "arguments": [ { "id": 966, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 951, "src": "9300:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 965, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 861, "src": "9292:7:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 967, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9292:16:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a20746f6b656e20616c7265616479206d696e746564", "id": 969, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9310:30:3", "typeDescriptions": { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" }, "value": "ERC721: token already minted" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" } ], "id": 964, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9283:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 970, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9283:58:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 971, "nodeType": "ExpressionStatement", "src": "9283:58:3" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 975, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9381:1:3", "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": 974, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9373:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 973, "name": "address", "nodeType": "ElementaryTypeName", "src": "9373:7:3", "typeDescriptions": {} } }, "id": 976, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9373:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 977, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9385:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 978, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 951, "src": "9389:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 972, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1220, "src": "9352:20:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 979, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9352:45:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 980, "nodeType": "ExpressionStatement", "src": "9352:45:3" }, { "expression": { "id": 985, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 981, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 441, "src": "9408:9:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 983, "indexExpression": { "id": 982, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9418:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9408:13:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "hexValue": "31", "id": 984, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9425:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "9408:18:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 986, "nodeType": "ExpressionStatement", "src": "9408:18:3" }, { "expression": { "id": 991, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 987, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 437, "src": "9436:7:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 989, "indexExpression": { "id": 988, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 951, "src": "9444:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9436:16:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 990, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9455:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9436:21:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 992, "nodeType": "ExpressionStatement", "src": "9436:21:3" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 996, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9490:1:3", "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": 995, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9482:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 994, "name": "address", "nodeType": "ElementaryTypeName", "src": "9482:7:3", "typeDescriptions": {} } }, "id": 997, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9482:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 998, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9494:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 999, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 951, "src": "9498:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 993, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1236, "src": "9473:8:3", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1000, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9473:33:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1001, "nodeType": "EmitStatement", "src": "9468:38:3" } ] }, "documentation": { "id": 947, "nodeType": "StructuredDocumentation", "src": "8825:311:3", "text": " @dev Mints `tokenId` and transfers it to `to`.\n WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible\n Requirements:\n - `tokenId` must not exist.\n - `to` cannot be the zero address.\n Emits a {Transfer} event." }, "id": 1003, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nodeType": "FunctionDefinition", "parameters": { "id": 952, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 949, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1003, "src": "9156:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 948, "name": "address", "nodeType": "ElementaryTypeName", "src": "9156:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 951, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1003, "src": "9168:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 950, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9168:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9155:29:3" }, "returnParameters": { "id": 953, "nodeType": "ParameterList", "parameters": [], "src": "9202:0:3" }, "scope": 1221, "src": "9141:372:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1053, "nodeType": "Block", "src": "9779:299:3", "statements": [ { "assignments": [ 1010 ], "declarations": [ { "constant": false, "id": 1010, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1053, "src": "9789:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1009, "name": "address", "nodeType": "ElementaryTypeName", "src": "9789:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 1015, "initialValue": { "arguments": [ { "id": 1013, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "9820:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 1011, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1221, "src": "9805:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$1221_$", "typeString": "type(contract ERC721)" } }, "id": 1012, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 551, "src": "9805:14:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 1014, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9805:23:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "9789:39:3" }, { "expression": { "arguments": [ { "id": 1017, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1010, "src": "9860:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 1020, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9875:1:3", "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": 1019, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9867:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1018, "name": "address", "nodeType": "ElementaryTypeName", "src": "9867:7:3", "typeDescriptions": {} } }, "id": 1021, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9867:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1022, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "9879:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1016, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1220, "src": "9839:20:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1023, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9839:48:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1024, "nodeType": "ExpressionStatement", "src": "9839:48:3" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 1028, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9942:1:3", "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": 1027, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9934:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1026, "name": "address", "nodeType": "ElementaryTypeName", "src": "9934:7:3", "typeDescriptions": {} } }, "id": 1029, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9934:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1030, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "9946:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1025, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1147, "src": "9925:8:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1031, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9925:29:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1032, "nodeType": "ExpressionStatement", "src": "9925:29:3" }, { "expression": { "id": 1037, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1033, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 441, "src": "9965:9:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1035, "indexExpression": { "id": 1034, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1010, "src": "9975:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9965:16:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "hexValue": "31", "id": 1036, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9985:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "9965:21:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1038, "nodeType": "ExpressionStatement", "src": "9965:21:3" }, { "expression": { "id": 1042, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "delete", "prefix": true, "src": "9996:23:3", "subExpression": { "baseExpression": { "id": 1039, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 437, "src": "10003:7:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 1041, "indexExpression": { "id": 1040, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "10011:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10003:16:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1043, "nodeType": "ExpressionStatement", "src": "9996:23:3" }, { "eventCall": { "arguments": [ { "id": 1045, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1010, "src": "10044:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 1048, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10059:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1047, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10051:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1046, "name": "address", "nodeType": "ElementaryTypeName", "src": "10051:7:3", "typeDescriptions": {} } }, "id": 1049, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10051:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1050, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "10063:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1044, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1236, "src": "10035:8:3", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1051, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10035:36:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1052, "nodeType": "EmitStatement", "src": "10030:41:3" } ] }, "documentation": { "id": 1004, "nodeType": "StructuredDocumentation", "src": "9519:206:3", "text": " @dev Destroys `tokenId`.\n The approval is cleared when the token is burned.\n Requirements:\n - `tokenId` must exist.\n Emits a {Transfer} event." }, "id": 1054, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 1007, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1006, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1054, "src": "9745:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1005, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9745:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9744:17:3" }, "returnParameters": { "id": 1008, "nodeType": "ParameterList", "parameters": [], "src": "9779:0:3" }, "scope": 1221, "src": "9730:348:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1122, "nodeType": "Block", "src": "10511:451:3", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1070, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 1067, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10544:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 1065, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1221, "src": "10529:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$1221_$", "typeString": "type(contract ERC721)" } }, "id": 1066, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 551, "src": "10529:14:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 1068, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10529:23:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 1069, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1057, "src": "10556:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10529:31:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e73666572206f6620746f6b656e2074686174206973206e6f74206f776e", "id": 1071, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10562:43:3", "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": 1064, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10521:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1072, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10521:85:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1073, "nodeType": "ExpressionStatement", "src": "10521:85:3" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1080, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1075, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10624:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1078, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10638:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1077, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10630:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1076, "name": "address", "nodeType": "ElementaryTypeName", "src": "10630:7:3", "typeDescriptions": {} } }, "id": 1079, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10630:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10624:16:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 1081, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10642:38:3", "typeDescriptions": { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" }, "value": "ERC721: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" } ], "id": 1074, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10616:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1082, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10616:65:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1083, "nodeType": "ExpressionStatement", "src": "10616:65:3" }, { "expression": { "arguments": [ { "id": 1085, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1057, "src": "10713:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1086, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10719:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1087, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10723:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1084, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1220, "src": "10692:20:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1088, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10692:39:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1089, "nodeType": "ExpressionStatement", "src": "10692:39:3" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 1093, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10810:1:3", "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": 1092, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10802:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1091, "name": "address", "nodeType": "ElementaryTypeName", "src": "10802:7:3", "typeDescriptions": {} } }, "id": 1094, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10802:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1095, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10814:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1090, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1147, "src": "10793:8:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1096, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10793:29:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1097, "nodeType": "ExpressionStatement", "src": "10793:29:3" }, { "expression": { "id": 1102, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1098, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 441, "src": "10833:9:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1100, "indexExpression": { "id": 1099, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1057, "src": "10843:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10833:15:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "hexValue": "31", "id": 1101, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10852:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "10833:20:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1103, "nodeType": "ExpressionStatement", "src": "10833:20:3" }, { "expression": { "id": 1108, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1104, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 441, "src": "10863:9:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1106, "indexExpression": { "id": 1105, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10873:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10863:13:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "hexValue": "31", "id": 1107, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10880:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "10863:18:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1109, "nodeType": "ExpressionStatement", "src": "10863:18:3" }, { "expression": { "id": 1114, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1110, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 437, "src": "10891:7:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 1112, "indexExpression": { "id": 1111, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10899:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10891:16:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1113, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10910:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10891:21:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 1115, "nodeType": "ExpressionStatement", "src": "10891:21:3" }, { "eventCall": { "arguments": [ { "id": 1117, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1057, "src": "10937:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1118, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10943:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1119, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10947:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1116, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1236, "src": "10928:8:3", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1120, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10928:27:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1121, "nodeType": "EmitStatement", "src": "10923:32:3" } ] }, "documentation": { "id": 1055, "nodeType": "StructuredDocumentation", "src": "10084:313:3", "text": " @dev Transfers `tokenId` from `from` to `to`.\n As opposed to {transferFrom}, this imposes no restrictions on msg.sender.\n Requirements:\n - `to` cannot be the zero address.\n - `tokenId` token must be owned by `from`.\n Emits a {Transfer} event." }, "id": 1123, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1062, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1057, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1123, "src": "10430:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1056, "name": "address", "nodeType": "ElementaryTypeName", "src": "10430:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1059, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1123, "src": "10452:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1058, "name": "address", "nodeType": "ElementaryTypeName", "src": "10452:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1061, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1123, "src": "10472:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1060, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10472:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10420:73:3" }, "returnParameters": { "id": 1063, "nodeType": "ParameterList", "parameters": [], "src": "10511:0:3" }, "scope": 1221, "src": "10402:560:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1146, "nodeType": "Block", "src": "11137:107:3", "statements": [ { "expression": { "id": 1135, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1131, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 445, "src": "11147:15:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 1133, "indexExpression": { "id": 1132, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1128, "src": "11163:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11147:24:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1134, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1126, "src": "11174:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11147:29:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 1136, "nodeType": "ExpressionStatement", "src": "11147:29:3" }, { "eventCall": { "arguments": [ { "arguments": [ { "id": 1140, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1128, "src": "11215:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 1138, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1221, "src": "11200:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$1221_$", "typeString": "type(contract ERC721)" } }, "id": 1139, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 551, "src": "11200:14:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 1141, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11200:23:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1142, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1126, "src": "11225:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1143, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1128, "src": "11229:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1137, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1245, "src": "11191:8:3", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1144, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11191:46:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1145, "nodeType": "EmitStatement", "src": "11186:51:3" } ] }, "documentation": { "id": 1124, "nodeType": "StructuredDocumentation", "src": "10968:100:3", "text": " @dev Approve `to` to operate on `tokenId`\n Emits a {Approval} event." }, "id": 1147, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nodeType": "FunctionDefinition", "parameters": { "id": 1129, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1126, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1147, "src": "11091:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1125, "name": "address", "nodeType": "ElementaryTypeName", "src": "11091:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1128, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1147, "src": "11103:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1127, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11103:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11090:29:3" }, "returnParameters": { "id": 1130, "nodeType": "ParameterList", "parameters": [], "src": "11137:0:3" }, "scope": 1221, "src": "11073:171:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1208, "nodeType": "Block", "src": "11953:622:3", "statements": [ { "condition": { "arguments": [], "expression": { "argumentTypes": [], "expression": { "id": 1161, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1152, "src": "11967:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 1162, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "isContract", "nodeType": "MemberAccess", "referencedDeclaration": 1530, "src": "11967:13:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$returns$_t_bool_$bound_to$_t_address_$", "typeString": "function (address) view returns (bool)" } }, "id": 1163, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11967:15:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 1206, "nodeType": "Block", "src": "12533:36:3", "statements": [ { "expression": { "hexValue": "74727565", "id": 1204, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "12554:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1160, "id": 1205, "nodeType": "Return", "src": "12547:11:3" } ] }, "id": 1207, "nodeType": "IfStatement", "src": "11963:606:3", "trueBody": { "id": 1203, "nodeType": "Block", "src": "11984:543:3", "statements": [ { "clauses": [ { "block": { "id": 1183, "nodeType": "Block", "src": "12099:91:3", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "id": 1181, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1177, "name": "retval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1175, "src": "12124:6:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "expression": { "expression": { "id": 1178, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1355, "src": "12134:15:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$1355_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 1179, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 1354, "src": "12134:32:3", "typeDescriptions": { "typeIdentifier": "t_function_declaration_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_calldata_ptr_$returns$_t_bytes4_$", "typeString": "function IERC721Receiver.onERC721Received(address,address,uint256,bytes calldata) returns (bytes4)" } }, "id": 1180, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "12134:41:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "src": "12124:51:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 1160, "id": 1182, "nodeType": "Return", "src": "12117:58:3" } ] }, "errorName": "", "id": 1184, "nodeType": "TryCatchClause", "parameters": { "id": 1176, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1175, "mutability": "mutable", "name": "retval", "nodeType": "VariableDeclaration", "scope": 1184, "src": "12084:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 1174, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "12084:6:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "visibility": "internal" } ], "src": "12083:15:3" }, "src": "12075:115:3" }, { "block": { "id": 1200, "nodeType": "Block", "src": "12219:298:3", "statements": [ { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1191, "isConstant": false, "isLValue": false, "isPure": 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"documentation": { "id": 1148, "nodeType": "StructuredDocumentation", "src": "11250:542:3", "text": " @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.\n The call is not executed if the target address is not a contract.\n @param from address representing the previous owner of the given token ID\n @param to target address that will receive the tokens\n @param tokenId uint256 ID of the token to be transferred\n @param _data bytes optional data to send along with the call\n @return bool whether the call correctly returned the expected magic value" }, "id": 1209, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkOnERC721Received", "nodeType": "FunctionDefinition", "parameters": { "id": 1157, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1150, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1209, "src": "11838:12:3", "stateVariable": false, "storageLocation": 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"mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1209, "src": "11947:4:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1158, "name": "bool", "nodeType": "ElementaryTypeName", "src": "11947:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "11946:6:3" }, "scope": 1221, "src": "11797:778:3", "stateMutability": "nonpayable", "virtual": false, "visibility": "private" }, { "body": { "id": 1219, "nodeType": "Block", "src": "13251:2:3", "statements": [] }, "documentation": { "id": 1210, "nodeType": "StructuredDocumentation", "src": "12581:545:3", "text": " @dev Hook that is called before any token transfer. This includes minting\n and burning.\n Calling conditions:\n - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be\n transferred to `to`.\n - When `from` is zero, `tokenId` will be minted for `to`.\n - When `to` is zero, ``from``'s `tokenId` will be burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]." }, "id": 1220, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1217, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1212, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1220, "src": "13170:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1211, "name": "address", "nodeType": "ElementaryTypeName", "src": 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"uint256", "nodeType": "ElementaryTypeName", "src": "13212:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "13160:73:3" }, "returnParameters": { "id": 1218, "nodeType": "ParameterList", "parameters": [], "src": "13251:0:3" }, "scope": 1221, "src": "13131:122:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "scope": 1222, "src": "554:12701:3" } ], "src": "33:13223:3" }, "legacyAST": { "absolutePath": "@openzeppelin/contracts/token/ERC721/ERC721.sol", "exportedSymbols": { "Address": [ 1807 ], "Context": [ 1829 ], "ERC165": [ 2130 ], "ERC721": [ 1221 ], "IERC165": [ 2142 ], "IERC721": [ 1337 ], "IERC721Metadata": [ 1510 ], "IERC721Receiver": [ 1355 ], "Strings": [ 2106 ] }, "id": 1222, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 407, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "33:23:3" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721.sol", "file": "./IERC721.sol", "id": 408, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1338, "src": "58:23:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol", "file": "./IERC721Receiver.sol", "id": 409, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1356, "src": "82:31:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol", "file": "./extensions/IERC721Metadata.sol", "id": 410, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1511, "src": "114:42:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Address.sol", "file": "../../utils/Address.sol", "id": 411, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1808, "src": "157:33:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Context.sol", "file": "../../utils/Context.sol", "id": 412, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 1830, "src": "191:33:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Strings.sol", "file": "../../utils/Strings.sol", "id": 413, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 2107, "src": "225:33:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/introspection/ERC165.sol", "file": "../../utils/introspection/ERC165.sol", "id": 414, "nodeType": "ImportDirective", "scope": 1222, "sourceUnit": 2131, "src": "259:46:3", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 416, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 1829, "src": "573:7:3" }, "id": 417, "nodeType": "InheritanceSpecifier", "src": "573:7:3" }, { "baseName": { "id": 418, "name": "ERC165", "nodeType": "IdentifierPath", "referencedDeclaration": 2130, "src": "582:6:3" }, "id": 419, "nodeType": "InheritanceSpecifier", "src": "582:6:3" }, { "baseName": { "id": 420, "name": "IERC721", "nodeType": "IdentifierPath", "referencedDeclaration": 1337, "src": "590:7:3" }, "id": 421, "nodeType": "InheritanceSpecifier", "src": "590:7:3" }, { "baseName": { "id": 422, "name": "IERC721Metadata", "nodeType": "IdentifierPath", "referencedDeclaration": 1510, "src": "599:15:3" }, "id": 423, "nodeType": "InheritanceSpecifier", "src": "599:15:3" } ], "contractDependencies": [ 1337, 1510, 1829, 2130, 2142 ], "contractKind": "contract", "documentation": { "id": 415, "nodeType": "StructuredDocumentation", "src": "307:246:3", "text": " @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n the Metadata extension, but not including the Enumerable extension, which is available separately as\n {ERC721Enumerable}." }, "fullyImplemented": true, "id": 1221, "linearizedBaseContracts": [ 1221, 1510, 1337, 2130, 2142, 1829 ], "name": "ERC721", "nodeType": "ContractDefinition", "nodes": [ { "id": 426, "libraryName": { "id": 424, "name": "Address", "nodeType": "IdentifierPath", "referencedDeclaration": 1807, "src": "627:7:3" }, "nodeType": "UsingForDirective", "src": "621:26:3", "typeName": { "id": 425, "name": "address", "nodeType": "ElementaryTypeName", "src": "639:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, { "id": 429, "libraryName": { "id": 427, "name": "Strings", "nodeType": "IdentifierPath", "referencedDeclaration": 2106, "src": "658:7:3" }, "nodeType": "UsingForDirective", "src": "652:26:3", "typeName": { "id": 428, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "670:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "constant": false, "id": 431, "mutability": "mutable", "name": "_name", "nodeType": "VariableDeclaration", "scope": 1221, "src": "702:20:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 430, "name": "string", "nodeType": "ElementaryTypeName", "src": "702:6:3", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 433, "mutability": "mutable", "name": "_symbol", "nodeType": "VariableDeclaration", "scope": 1221, "src": "749:22:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 432, "name": "string", "nodeType": "ElementaryTypeName", "src": "749:6:3", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 437, "mutability": "mutable", "name": "_owners", "nodeType": "VariableDeclaration", "scope": 1221, "src": "824:43:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "typeName": { "id": 436, "keyType": { "id": 434, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "832:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Mapping", "src": "824:27:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "valueType": { "id": 435, "name": "address", "nodeType": "ElementaryTypeName", "src": "843:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "visibility": "private" }, { "constant": false, "id": 441, "mutability": "mutable", "name": "_balances", "nodeType": "VariableDeclaration", "scope": 1221, "src": "918:45:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 440, "keyType": { "id": 438, "name": "address", "nodeType": "ElementaryTypeName", "src": "926:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "918:27:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 439, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "937:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "visibility": "private" }, { "constant": false, "id": 445, "mutability": "mutable", "name": "_tokenApprovals", "nodeType": "VariableDeclaration", "scope": 1221, "src": "1019:51:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { 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"constant": false, "id": 787, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 814, "src": "5465:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 786, "name": "address", "nodeType": "ElementaryTypeName", "src": "5465:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 789, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 814, "src": "5487:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 788, "name": "address", "nodeType": "ElementaryTypeName", "src": "5487:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 791, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 814, "src": "5507:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 790, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5507:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 793, "mutability": "mutable", "name": "_data", "nodeType": "VariableDeclaration", "scope": 814, "src": "5532:18:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 792, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "5532:5:3", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "5455:101:3" }, "returnParameters": { "id": 796, "nodeType": "ParameterList", "parameters": [], "src": "5581:0:3" }, "scope": 1221, "src": "5430:320:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 842, "nodeType": "Block", "src": "6753:166:3", "statements": [ { "expression": { "arguments": [ { "id": 827, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 817, "src": "6773:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 828, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 819, "src": "6779:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 829, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 821, "src": "6783:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 826, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1123, "src": "6763:9:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 830, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6763:28:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 831, "nodeType": "ExpressionStatement", "src": "6763:28:3" }, { "expression": { "arguments": [ { "arguments": [ { "id": 834, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 817, "src": "6832:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 835, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 819, "src": "6838:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 836, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 821, "src": "6842:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 837, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 823, "src": "6851:5:3", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 833, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1209, "src": "6809:22:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 838, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6809:48:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 839, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6859:52:3", "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": 832, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "6801:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 840, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6801:111:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 841, "nodeType": "ExpressionStatement", "src": "6801:111:3" } ] }, "documentation": { "id": 815, "nodeType": "StructuredDocumentation", "src": "5756:851:3", "text": " @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n are aware of the ERC721 protocol to prevent tokens from being forever locked.\n `_data` is additional data, it has no specified format and it is sent in call to `to`.\n This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.\n implement alternative mechanisms to perform token transfer, such as signature-based.\n Requirements:\n - `from` cannot be the zero address.\n - `to` cannot be the zero address.\n - `tokenId` token must exist and be owned by `from`.\n - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n Emits a {Transfer} event." }, "id": 843, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeTransfer", "nodeType": "FunctionDefinition", "parameters": { "id": 824, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 817, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 843, "src": "6644:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 816, "name": "address", "nodeType": "ElementaryTypeName", "src": "6644:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 819, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 843, "src": "6666:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 818, "name": "address", "nodeType": "ElementaryTypeName", "src": "6666:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 821, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 843, "src": "6686:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 820, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6686:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 823, "mutability": "mutable", "name": "_data", "nodeType": "VariableDeclaration", "scope": 843, "src": "6711:18:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 822, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "6711:5:3", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "6634:101:3" }, "returnParameters": { "id": 825, "nodeType": "ParameterList", "parameters": [], "src": "6753:0:3" }, "scope": 1221, "src": "6612:307:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 860, "nodeType": "Block", "src": "7293:54:3", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 858, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "baseExpression": { "id": 851, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 437, "src": "7310:7:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 853, "indexExpression": { "id": 852, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 846, "src": "7318:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7310:16:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 856, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7338:1:3", "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": 855, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7330:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 854, "name": "address", "nodeType": "ElementaryTypeName", "src": "7330:7:3", "typeDescriptions": {} } }, "id": 857, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7330:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7310:30:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 850, "id": 859, "nodeType": "Return", "src": "7303:37:3" } ] }, "documentation": { "id": 844, "nodeType": "StructuredDocumentation", "src": "6925:292:3", "text": " @dev Returns whether `tokenId` exists.\n Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\n Tokens start existing when they are minted (`_mint`),\n and stop existing when they are burned (`_burn`)." }, "id": 861, "implemented": true, "kind": "function", "modifiers": [], "name": "_exists", "nodeType": "FunctionDefinition", "parameters": { "id": 847, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 846, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 861, "src": "7239:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 845, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7239:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7238:17:3" }, "returnParameters": { "id": 850, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 849, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 861, "src": "7287:4:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 848, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7287:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7286:6:3" }, "scope": 1221, "src": "7222:125:3", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 901, "nodeType": "Block", "src": "7604:245:3", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "id": 873, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 866, "src": "7630:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 872, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 861, "src": "7622:7:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 874, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7622:16:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a206f70657261746f7220717565727920666f72206e6f6e6578697374656e7420746f6b656e", "id": 875, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7640:46:3", "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": 871, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "7614:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 876, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7614:73:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 877, "nodeType": "ExpressionStatement", "src": "7614:73:3" }, { "assignments": [ 879 ], "declarations": [ { "constant": false, "id": 879, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 901, "src": "7697:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 878, "name": "address", "nodeType": "ElementaryTypeName", "src": "7697:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 884, "initialValue": { "arguments": [ { "id": 882, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 866, "src": "7728:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 880, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1221, "src": "7713:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$1221_$", "typeString": "type(contract ERC721)" } }, "id": 881, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 551, "src": "7713:14:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 883, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7713:23:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7697:39:3" }, { "expression": { "components": [ { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 898, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 893, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 887, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 885, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 864, "src": "7754:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 886, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 879, "src": "7765:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7754:16:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 892, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 889, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 866, "src": "7786:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 888, "name": "getApproved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 686, "src": "7774:11:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 890, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7774:20:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 891, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 864, "src": "7798:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7774:31:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7754:51:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "arguments": [ { "id": 895, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 879, "src": "7826:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 896, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 864, "src": "7833:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 894, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 738, "src": "7809:16:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 897, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7809:32:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7754:87:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 899, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "7753:89:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 870, "id": 900, "nodeType": "Return", "src": "7746:96:3" } ] }, "documentation": { "id": 862, "nodeType": "StructuredDocumentation", "src": "7353:147:3", "text": " @dev Returns whether `spender` is allowed to manage `tokenId`.\n Requirements:\n - `tokenId` must exist." }, "id": 902, "implemented": true, "kind": "function", "modifiers": [], "name": "_isApprovedOrOwner", "nodeType": "FunctionDefinition", "parameters": { "id": 867, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 864, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 902, "src": "7533:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 863, "name": "address", "nodeType": "ElementaryTypeName", "src": "7533:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 866, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 902, "src": "7550:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 865, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7550:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7532:34:3" }, "returnParameters": { "id": 870, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 869, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 902, "src": "7598:4:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 868, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7598:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7597:6:3" }, "scope": 1221, "src": "7505:344:3", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 916, "nodeType": "Block", "src": "8244:43:3", "statements": [ { "expression": { "arguments": [ { "id": 911, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 905, "src": "8264:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 912, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 907, "src": "8268:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "", "id": 913, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8277:2:3", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" }, "value": "" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" } ], "id": 910, "name": "_safeMint", "nodeType": "Identifier", "overloadedDeclarations": [ 917, 946 ], "referencedDeclaration": 946, "src": "8254:9:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,uint256,bytes memory)" } }, "id": 914, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8254:26:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 915, "nodeType": "ExpressionStatement", "src": "8254:26:3" } ] }, "documentation": { "id": 903, "nodeType": "StructuredDocumentation", "src": "7855:319:3", "text": " @dev Safely mints `tokenId` and transfers it to `to`.\n Requirements:\n - `tokenId` must not exist.\n - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n Emits a {Transfer} event." }, "id": 917, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nodeType": "FunctionDefinition", "parameters": { "id": 908, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 905, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 917, "src": "8198:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 904, "name": "address", "nodeType": "ElementaryTypeName", "src": "8198:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 907, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 917, "src": "8210:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 906, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8210:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8197:29:3" }, "returnParameters": { "id": 909, "nodeType": "ParameterList", "parameters": [], "src": "8244:0:3" }, "scope": 1221, "src": "8179:108:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 945, "nodeType": "Block", "src": "8623:196:3", "statements": [ { "expression": { "arguments": [ { "id": 928, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 920, "src": "8639:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 929, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 922, "src": "8643:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 927, "name": "_mint", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1003, "src": "8633:5:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 930, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8633:18:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 931, "nodeType": "ExpressionStatement", "src": "8633:18:3" }, { "expression": { "arguments": [ { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 936, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8713:1:3", "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": 935, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8705:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 934, "name": "address", "nodeType": "ElementaryTypeName", "src": "8705:7:3", "typeDescriptions": {} } }, "id": 937, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8705:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 938, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 920, "src": "8717:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 939, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 922, "src": "8721:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 940, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 924, "src": "8730:5:3", "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": 933, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1209, "src": "8682:22:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 941, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8682:54:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 942, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8750:52:3", "typeDescriptions": { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" }, "value": "ERC721: transfer to non ERC721Receiver implementer" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" } ], "id": 932, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "8661:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 943, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8661:151:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 944, "nodeType": "ExpressionStatement", "src": "8661:151:3" } ] }, "documentation": { "id": 918, "nodeType": "StructuredDocumentation", "src": "8293:210:3", "text": " @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is\n forwarded in {IERC721Receiver-onERC721Received} to contract recipients." }, "id": 946, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nodeType": "FunctionDefinition", "parameters": { "id": 925, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 920, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 946, "src": "8536:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 919, "name": "address", "nodeType": "ElementaryTypeName", "src": "8536:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 922, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 946, "src": "8556:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 921, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8556:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 924, "mutability": "mutable", "name": "_data", "nodeType": "VariableDeclaration", "scope": 946, "src": "8581:18:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 923, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "8581:5:3", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "8526:79:3" }, "returnParameters": { "id": 926, "nodeType": "ParameterList", "parameters": [], "src": "8623:0:3" }, "scope": 1221, "src": "8508:311:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1002, "nodeType": "Block", "src": "9202:311:3", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 960, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 955, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9220:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 958, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9234:1:3", "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": 957, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9226:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 956, "name": "address", "nodeType": "ElementaryTypeName", "src": "9226:7:3", "typeDescriptions": {} } }, "id": 959, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9226:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9220:16:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a206d696e7420746f20746865207a65726f2061646472657373", "id": 961, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9238:34:3", "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": 954, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9212:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 962, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9212:61:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 963, "nodeType": "ExpressionStatement", "src": "9212:61:3" }, { "expression": { "arguments": [ { "id": 968, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "9291:17:3", "subExpression": { "arguments": [ { "id": 966, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 951, "src": "9300:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 965, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 861, "src": "9292:7:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 967, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9292:16:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a20746f6b656e20616c7265616479206d696e746564", "id": 969, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9310:30:3", "typeDescriptions": { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" }, "value": "ERC721: token already minted" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" } ], "id": 964, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9283:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 970, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9283:58:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 971, "nodeType": "ExpressionStatement", "src": "9283:58:3" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 975, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9381:1:3", "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": 974, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9373:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 973, "name": "address", "nodeType": "ElementaryTypeName", "src": "9373:7:3", "typeDescriptions": {} } }, "id": 976, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9373:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 977, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9385:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 978, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 951, "src": "9389:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 972, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1220, "src": "9352:20:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 979, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9352:45:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 980, "nodeType": "ExpressionStatement", "src": "9352:45:3" }, { "expression": { "id": 985, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 981, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 441, "src": "9408:9:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 983, "indexExpression": { "id": 982, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9418:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9408:13:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "hexValue": "31", "id": 984, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9425:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "9408:18:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 986, "nodeType": "ExpressionStatement", "src": "9408:18:3" }, { "expression": { "id": 991, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 987, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 437, "src": "9436:7:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 989, "indexExpression": { "id": 988, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 951, "src": "9444:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9436:16:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 990, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9455:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9436:21:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 992, "nodeType": "ExpressionStatement", "src": "9436:21:3" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 996, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9490:1:3", "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": 995, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9482:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 994, "name": "address", "nodeType": "ElementaryTypeName", "src": "9482:7:3", "typeDescriptions": {} } }, "id": 997, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9482:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 998, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 949, "src": "9494:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 999, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 951, "src": "9498:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 993, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1236, "src": "9473:8:3", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1000, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9473:33:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1001, "nodeType": "EmitStatement", "src": "9468:38:3" } ] }, "documentation": { "id": 947, "nodeType": "StructuredDocumentation", "src": "8825:311:3", "text": " @dev Mints `tokenId` and transfers it to `to`.\n WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible\n Requirements:\n - `tokenId` must not exist.\n - `to` cannot be the zero address.\n Emits a {Transfer} event." }, "id": 1003, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nodeType": "FunctionDefinition", "parameters": { "id": 952, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 949, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1003, "src": "9156:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 948, "name": "address", "nodeType": "ElementaryTypeName", "src": "9156:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 951, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1003, "src": "9168:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 950, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9168:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9155:29:3" }, "returnParameters": { "id": 953, "nodeType": "ParameterList", "parameters": [], "src": "9202:0:3" }, "scope": 1221, "src": "9141:372:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1053, "nodeType": "Block", "src": "9779:299:3", "statements": [ { "assignments": [ 1010 ], "declarations": [ { "constant": false, "id": 1010, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1053, "src": "9789:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1009, "name": "address", "nodeType": "ElementaryTypeName", "src": "9789:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 1015, "initialValue": { "arguments": [ { "id": 1013, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "9820:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 1011, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1221, "src": "9805:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$1221_$", "typeString": "type(contract ERC721)" } }, "id": 1012, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 551, "src": "9805:14:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 1014, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9805:23:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "9789:39:3" }, { "expression": { "arguments": [ { "id": 1017, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1010, "src": "9860:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 1020, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9875:1:3", "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": 1019, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9867:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1018, "name": "address", "nodeType": "ElementaryTypeName", "src": "9867:7:3", "typeDescriptions": {} } }, "id": 1021, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9867:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1022, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "9879:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1016, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1220, "src": "9839:20:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1023, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9839:48:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1024, "nodeType": "ExpressionStatement", "src": "9839:48:3" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 1028, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9942:1:3", "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": 1027, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9934:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1026, "name": "address", "nodeType": "ElementaryTypeName", "src": "9934:7:3", "typeDescriptions": {} } }, "id": 1029, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9934:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1030, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "9946:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1025, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1147, "src": "9925:8:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1031, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9925:29:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1032, "nodeType": "ExpressionStatement", "src": "9925:29:3" }, { "expression": { "id": 1037, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1033, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 441, "src": "9965:9:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1035, "indexExpression": { "id": 1034, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1010, "src": "9975:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9965:16:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "hexValue": "31", "id": 1036, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9985:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "9965:21:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1038, "nodeType": "ExpressionStatement", "src": "9965:21:3" }, { "expression": { "id": 1042, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "delete", "prefix": true, "src": "9996:23:3", "subExpression": { "baseExpression": { "id": 1039, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 437, "src": "10003:7:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 1041, "indexExpression": { "id": 1040, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "10011:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10003:16:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1043, "nodeType": "ExpressionStatement", "src": "9996:23:3" }, { "eventCall": { "arguments": [ { "id": 1045, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1010, "src": "10044:5:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 1048, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10059:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1047, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10051:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1046, "name": "address", "nodeType": "ElementaryTypeName", "src": "10051:7:3", "typeDescriptions": {} } }, "id": 1049, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10051:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1050, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1006, "src": "10063:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1044, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1236, "src": "10035:8:3", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1051, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10035:36:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1052, "nodeType": "EmitStatement", "src": "10030:41:3" } ] }, "documentation": { "id": 1004, "nodeType": "StructuredDocumentation", "src": "9519:206:3", "text": " @dev Destroys `tokenId`.\n The approval is cleared when the token is burned.\n Requirements:\n - `tokenId` must exist.\n Emits a {Transfer} event." }, "id": 1054, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 1007, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1006, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1054, "src": "9745:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1005, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9745:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9744:17:3" }, "returnParameters": { "id": 1008, "nodeType": "ParameterList", "parameters": [], "src": "9779:0:3" }, "scope": 1221, "src": "9730:348:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1122, "nodeType": "Block", "src": "10511:451:3", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1070, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 1067, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10544:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 1065, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1221, "src": "10529:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$1221_$", "typeString": "type(contract ERC721)" } }, "id": 1066, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 551, "src": "10529:14:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 1068, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10529:23:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 1069, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1057, "src": "10556:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10529:31:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e73666572206f6620746f6b656e2074686174206973206e6f74206f776e", "id": 1071, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10562:43:3", "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": 1064, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10521:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1072, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10521:85:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1073, "nodeType": "ExpressionStatement", "src": "10521:85:3" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1080, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1075, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10624:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1078, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10638:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1077, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10630:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1076, "name": "address", "nodeType": "ElementaryTypeName", "src": "10630:7:3", "typeDescriptions": {} } }, "id": 1079, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10630:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10624:16:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 1081, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10642:38:3", "typeDescriptions": { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" }, "value": "ERC721: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" } ], "id": 1074, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10616:7:3", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1082, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10616:65:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1083, "nodeType": "ExpressionStatement", "src": "10616:65:3" }, { "expression": { "arguments": [ { "id": 1085, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1057, "src": "10713:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1086, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10719:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1087, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10723:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1084, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1220, "src": "10692:20:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1088, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10692:39:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1089, "nodeType": "ExpressionStatement", "src": "10692:39:3" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 1093, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10810:1:3", "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": 1092, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10802:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1091, "name": "address", "nodeType": "ElementaryTypeName", "src": "10802:7:3", "typeDescriptions": {} } }, "id": 1094, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10802:10:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1095, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10814:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1090, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1147, "src": "10793:8:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1096, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10793:29:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1097, "nodeType": "ExpressionStatement", "src": "10793:29:3" }, { "expression": { "id": 1102, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1098, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 441, "src": "10833:9:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1100, "indexExpression": { "id": 1099, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1057, "src": "10843:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10833:15:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "hexValue": "31", "id": 1101, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10852:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "10833:20:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1103, "nodeType": "ExpressionStatement", "src": "10833:20:3" }, { "expression": { "id": 1108, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1104, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 441, "src": "10863:9:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1106, "indexExpression": { "id": 1105, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10873:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10863:13:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "hexValue": "31", "id": 1107, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10880:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "10863:18:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1109, "nodeType": "ExpressionStatement", "src": "10863:18:3" }, { "expression": { "id": 1114, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1110, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 437, "src": "10891:7:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 1112, "indexExpression": { "id": 1111, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10899:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10891:16:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1113, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10910:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10891:21:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 1115, "nodeType": "ExpressionStatement", "src": "10891:21:3" }, { "eventCall": { "arguments": [ { "id": 1117, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1057, "src": "10937:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1118, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1059, "src": "10943:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1119, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1061, "src": "10947:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1116, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1236, "src": "10928:8:3", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1120, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10928:27:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1121, "nodeType": "EmitStatement", "src": "10923:32:3" } ] }, "documentation": { "id": 1055, "nodeType": "StructuredDocumentation", "src": "10084:313:3", "text": " @dev Transfers `tokenId` from `from` to `to`.\n As opposed to {transferFrom}, this imposes no restrictions on msg.sender.\n Requirements:\n - `to` cannot be the zero address.\n - `tokenId` token must be owned by `from`.\n Emits a {Transfer} event." }, "id": 1123, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1062, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1057, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1123, "src": "10430:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1056, "name": "address", "nodeType": "ElementaryTypeName", "src": "10430:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1059, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1123, "src": "10452:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1058, "name": "address", "nodeType": "ElementaryTypeName", "src": "10452:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1061, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1123, "src": "10472:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1060, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10472:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10420:73:3" }, "returnParameters": { "id": 1063, "nodeType": "ParameterList", "parameters": [], "src": "10511:0:3" }, "scope": 1221, "src": "10402:560:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1146, "nodeType": "Block", "src": "11137:107:3", "statements": [ { "expression": { "id": 1135, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1131, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 445, "src": "11147:15:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 1133, "indexExpression": { "id": 1132, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1128, "src": "11163:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11147:24:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1134, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1126, "src": "11174:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11147:29:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 1136, "nodeType": "ExpressionStatement", "src": "11147:29:3" }, { "eventCall": { "arguments": [ { "arguments": [ { "id": 1140, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1128, "src": "11215:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 1138, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1221, "src": "11200:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$1221_$", "typeString": "type(contract ERC721)" } }, "id": 1139, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 551, "src": "11200:14:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 1141, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11200:23:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1142, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1126, "src": "11225:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1143, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1128, "src": "11229:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1137, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1245, "src": "11191:8:3", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1144, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11191:46:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1145, "nodeType": "EmitStatement", "src": "11186:51:3" } ] }, "documentation": { "id": 1124, "nodeType": "StructuredDocumentation", "src": "10968:100:3", "text": " @dev Approve `to` to operate on `tokenId`\n Emits a {Approval} event." }, "id": 1147, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nodeType": "FunctionDefinition", "parameters": { "id": 1129, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1126, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1147, "src": "11091:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1125, "name": "address", "nodeType": "ElementaryTypeName", "src": "11091:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1128, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1147, "src": "11103:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1127, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11103:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11090:29:3" }, "returnParameters": { "id": 1130, "nodeType": "ParameterList", "parameters": [], "src": "11137:0:3" }, "scope": 1221, "src": "11073:171:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1208, "nodeType": "Block", "src": "11953:622:3", "statements": [ { "condition": { "arguments": [], "expression": { "argumentTypes": [], "expression": { "id": 1161, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1152, "src": "11967:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 1162, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "isContract", "nodeType": "MemberAccess", "referencedDeclaration": 1530, "src": "11967:13:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$returns$_t_bool_$bound_to$_t_address_$", "typeString": "function (address) view returns (bool)" } }, "id": 1163, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11967:15:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 1206, "nodeType": "Block", "src": "12533:36:3", "statements": [ { "expression": { "hexValue": "74727565", "id": 1204, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "12554:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1160, "id": 1205, "nodeType": "Return", "src": "12547:11:3" } ] }, "id": 1207, "nodeType": "IfStatement", "src": "11963:606:3", "trueBody": { "id": 1203, "nodeType": "Block", "src": "11984:543:3", "statements": [ { "clauses": [ { "block": { "id": 1183, "nodeType": "Block", "src": "12099:91:3", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "id": 1181, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1177, "name": "retval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1175, "src": "12124:6:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "expression": { "expression": { "id": 1178, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1355, "src": "12134:15:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$1355_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 1179, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 1354, "src": "12134:32:3", "typeDescriptions": { "typeIdentifier": "t_function_declaration_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_calldata_ptr_$returns$_t_bytes4_$", "typeString": "function IERC721Receiver.onERC721Received(address,address,uint256,bytes calldata) returns (bytes4)" } }, "id": 1180, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "12134:41:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "src": "12124:51:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 1160, "id": 1182, "nodeType": "Return", "src": "12117:58:3" } ] }, "errorName": "", "id": 1184, "nodeType": "TryCatchClause", "parameters": { "id": 1176, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1175, "mutability": "mutable", "name": "retval", "nodeType": "VariableDeclaration", "scope": 1184, "src": "12084:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 1174, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "12084:6:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "visibility": "internal" } ], "src": "12083:15:3" }, "src": "12075:115:3" }, { "block": { "id": 1200, "nodeType": "Block", "src": "12219:298:3", "statements": [ { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1191, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "expression": { "id": 1188, "name": "reason", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1186, "src": "12241:6:3", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 1189, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "src": "12241:13:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 1190, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12258:1:3", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "12241:18:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 1198, "nodeType": "Block", "src": "12368:135:3", "statements": [ { "AST": { "nodeType": "YulBlock", "src": "12399:86:3", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "kind": "number", "nodeType": "YulLiteral", "src": "12436:2:3", "type": "", "value": "32" }, { "name": "reason", "nodeType": "YulIdentifier", "src": "12440:6:3" } ], "functionName": { "name": "add", "nodeType": "YulIdentifier", "src": "12432:3:3" }, "nodeType": "YulFunctionCall", "src": "12432:15:3" }, { "arguments": [ { "name": "reason", "nodeType": "YulIdentifier", "src": "12455:6:3" } ], "functionName": { "name": "mload", "nodeType": "YulIdentifier", "src": "12449:5:3" }, "nodeType": "YulFunctionCall", "src": "12449:13:3" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "12425:6:3" }, "nodeType": "YulFunctionCall", "src": "12425:38:3" }, "nodeType": "YulExpressionStatement", "src": "12425:38:3" } ] }, "evmVersion": "istanbul", "externalReferences": [ { "declaration": 1186, "isOffset": false, "isSlot": false, "src": "12440:6:3", "valueSize": 1 }, { "declaration": 1186, "isOffset": false, "isSlot": false, "src": "12455:6:3", "valueSize": 1 } ], "id": 1197, "nodeType": "InlineAssembly", "src": "12390:95:3" } ] }, "id": 1199, "nodeType": "IfStatement", "src": "12237:266:3", "trueBody": { "id": 1196, "nodeType": "Block", "src": "12261:101:3", "statements": [ { "expression": { "arguments": [ { "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 1193, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "12290:52:3", "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_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" } ], "id": 1192, "name": "revert", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967277, 4294967277 ], "referencedDeclaration": 4294967277, "src": "12283:6:3", "typeDescriptions": { "typeIdentifier": "t_function_revert_pure$_t_string_memory_ptr_$returns$__$", "typeString": "function (string memory) pure" } }, "id": 1194, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12283:60:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1195, "nodeType": "ExpressionStatement", "src": "12283:60:3" } ] } } ] }, "errorName": "", "id": 1201, "nodeType": "TryCatchClause", "parameters": { "id": 1187, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1186, "mutability": "mutable", "name": "reason", "nodeType": "VariableDeclaration", "scope": 1201, "src": "12198:19:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 1185, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "12198:5:3", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "12197:21:3" }, "src": "12191:326:3" } ], "externalCall": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 1168, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1819, "src": "12039:10:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1169, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12039:12:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1170, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1150, "src": "12053:4:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1171, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1154, "src": "12059:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 1172, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1156, "src": "12068:5:3", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "arguments": [ { "id": 1165, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1152, "src": "12018:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 1164, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1355, "src": "12002:15:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$1355_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 1166, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12002:19:3", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_contract$_IERC721Receiver_$1355", "typeString": "contract IERC721Receiver" } }, "id": 1167, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 1354, "src": "12002:36:3", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bytes4_$", "typeString": "function (address,address,uint256,bytes memory) external returns (bytes4)" } }, "id": 1173, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12002:72:3", "tryCall": true, "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "id": 1202, "nodeType": "TryStatement", "src": "11998:519:3" } ] } } ] }, "documentation": { "id": 1148, "nodeType": "StructuredDocumentation", "src": "11250:542:3", "text": " @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.\n The call is not executed if the target address is not a contract.\n @param from address representing the previous owner of the given token ID\n @param to target address that will receive the tokens\n @param tokenId uint256 ID of the token to be transferred\n @param _data bytes optional data to send along with the call\n @return bool whether the call correctly returned the expected magic value" }, "id": 1209, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkOnERC721Received", "nodeType": "FunctionDefinition", "parameters": { "id": 1157, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1150, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1209, "src": "11838:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1149, "name": "address", "nodeType": "ElementaryTypeName", "src": "11838:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1152, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1209, "src": "11860:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1151, "name": "address", "nodeType": "ElementaryTypeName", "src": "11860:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1154, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1209, "src": "11880:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1153, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11880:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 1156, "mutability": "mutable", "name": "_data", "nodeType": "VariableDeclaration", "scope": 1209, "src": "11905:18:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 1155, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "11905:5:3", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "11828:101:3" }, "returnParameters": { "id": 1160, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1159, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1209, "src": "11947:4:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1158, "name": "bool", "nodeType": "ElementaryTypeName", "src": "11947:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "11946:6:3" }, "scope": 1221, "src": "11797:778:3", "stateMutability": "nonpayable", "virtual": false, "visibility": "private" }, { "body": { "id": 1219, "nodeType": "Block", "src": "13251:2:3", "statements": [] }, "documentation": { "id": 1210, "nodeType": "StructuredDocumentation", "src": "12581:545:3", "text": " @dev Hook that is called before any token transfer. This includes minting\n and burning.\n Calling conditions:\n - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be\n transferred to `to`.\n - When `from` is zero, `tokenId` will be minted for `to`.\n - When `to` is zero, ``from``'s `tokenId` will be burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]." }, "id": 1220, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1217, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1212, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1220, "src": "13170:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1211, "name": "address", "nodeType": "ElementaryTypeName", "src": "13170:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1214, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1220, "src": "13192:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1213, "name": "address", "nodeType": "ElementaryTypeName", "src": "13192:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1216, "mutability": "mutable", "name": "tokenId", "nodeType": "VariableDeclaration", "scope": 1220, "src": "13212:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1215, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13212:7:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "13160:73:3" }, "returnParameters": { "id": 1218, "nodeType": "ParameterList", "parameters": [], "src": "13251:0:3" }, "scope": 1221, "src": "13131:122:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "scope": 1222, "src": "554:12701:3" } ], "src": "33:13223:3" }, "compiler": { "name": "solc", "version": "0.8.0+commit.c7dfd78e.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.4.3", "updatedAt": "2021-11-27T07:41:30.857Z", "devdoc": { "details": "Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including the Metadata extension, but not including the Enumerable extension, which is available separately as {ERC721Enumerable}.", "kind": "dev", "methods": { "approve(address,uint256)": { "details": "See {IERC721-approve}." }, "balanceOf(address)": { "details": "See {IERC721-balanceOf}." }, "constructor": { "details": "Initializes the contract by setting a `name` and a `symbol` to the token collection." }, "getApproved(uint256)": { "details": "See {IERC721-getApproved}." }, "isApprovedForAll(address,address)": { "details": "See {IERC721-isApprovedForAll}." }, "name()": { "details": "See {IERC721Metadata-name}." }, "ownerOf(uint256)": { "details": "See {IERC721-ownerOf}." }, "safeTransferFrom(address,address,uint256)": { "details": "See {IERC721-safeTransferFrom}." }, "safeTransferFrom(address,address,uint256,bytes)": { "details": "See {IERC721-safeTransferFrom}." }, "setApprovalForAll(address,bool)": { "details": "See {IERC721-setApprovalForAll}." }, "supportsInterface(bytes4)": { "details": "See {IERC165-supportsInterface}." }, "symbol()": { "details": "See {IERC721Metadata-symbol}." }, "tokenURI(uint256)": { "details": "See {IERC721Metadata-tokenURI}." }, "transferFrom(address,address,uint256)": { "details": "See {IERC721-transferFrom}." } }, "version": 1 }, "userdoc": { "kind": "user", "methods": {}, "version": 1 } }