{ "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\":\"0.8.11+commit.d7f03943\"},\"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 {IERC721-transferFrom}.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/token/ERC721/ERC721.sol\":\"ERC721\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/token/ERC721/ERC721.sol\":{\"keccak256\":\"0x11b84bb56dc112a6590bfe3e0efa118aa1b5891132342200d04c4ef544cb93de\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://cbc4803332d45dff58f865ed21c942fe4668e47cc7196c8dfe84102040b1d70f\",\"dweb:/ipfs/QmXhZLsocznRWCSyhjo3vo66Z1VsuuNptAVb6ASPYsWtGx\"]},\"@openzeppelin/contracts/token/ERC721/IERC721.sol\":{\"keccak256\":\"0x516a22876c1fab47f49b1bc22b4614491cd05338af8bd2e7b382da090a079990\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://a439187f7126d31add4557f82d8aed6be0162007cd7182c48fd934dbab8f3849\",\"dweb:/ipfs/QmRPLguRFvrRJS7r6F1bcLvsx6q1VrgjEpZafyeL8D7xZh\"]},\"@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol\":{\"keccak256\":\"0xd5fa74b4fb323776fa4a8158800fec9d5ac0fec0d6dd046dd93798632ada265f\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://33017a30a99cc5411a9e376622c31fc4a55cfc6a335e2f57f00cbf24a817ff3f\",\"dweb:/ipfs/QmWNQtWTPhA7Lo8nbxbc8KFMvZwbFYB8fSeEQ3vuapSV4a\"]},\"@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol\":{\"keccak256\":\"0x75b829ff2f26c14355d1cba20e16fe7b29ca58eb5fef665ede48bc0f9c6c74b9\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://a0a107160525724f9e1bbbab031defc2f298296dd9e331f16a6f7130cec32146\",\"dweb:/ipfs/QmemujxSd7gX8A9M8UwmNbz4Ms3U9FG9QfudUgxwvTmPWf\"]},\"@openzeppelin/contracts/utils/Address.sol\":{\"keccak256\":\"0x2ccf9d2313a313d41a791505f2b5abfdc62191b5d4334f7f7a82691c088a1c87\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://b3a57d0854b2fdce6ebff933a48dca2445643d1eccfc27f00292e937f26c6a58\",\"dweb:/ipfs/QmW45rZooS9TqR4YXUbjRbtf2Bpb5ouSarBvfW1LdGprvV\"]},\"@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0xe2e337e6dde9ef6b680e07338c493ebea1b5fd09b43424112868e9cc1706bca7\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://6df0ddf21ce9f58271bdfaa85cde98b200ef242a05a3f85c2bc10a8294800a92\",\"dweb:/ipfs/QmRK2Y5Yc6BK7tGKkgsgn3aJEQGi5aakeSPZvS65PV8Xp3\"]},\"@openzeppelin/contracts/utils/Strings.sol\":{\"keccak256\":\"0x32c202bd28995dd20c4347b7c6467a6d3241c74c8ad3edcbb610cd9205916c45\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://8179c356adb19e70d6b31a1eedc8c5c7f0c00e669e2540f4099e3844c6074d30\",\"dweb:/ipfs/QmWFbivarEobbqhS1go64ootVuHfVohBseerYy9FTEd1W2\"]},\"@openzeppelin/contracts/utils/introspection/ERC165.sol\":{\"keccak256\":\"0xd10975de010d89fd1c78dc5e8a9a7e7f496198085c151648f20cba166b32582b\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://fb0048dee081f6fffa5f74afc3fb328483c2a30504e94a0ddd2a5114d731ec4d\",\"dweb:/ipfs/QmZptt1nmYoA5SgjwnSgWqgUSDgm4q52Yos3xhnMv3MV43\"]},\"@openzeppelin/contracts/utils/introspection/IERC165.sol\":{\"keccak256\":\"0x447a5f3ddc18419d41ff92b3773fb86471b1db25773e07f877f548918a185bf1\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://be161e54f24e5c6fae81a12db1a8ae87bc5ae1b0ddc805d82a1440a68455088f\",\"dweb:/ipfs/QmP7C3CHdY9urF4dEMb9wmsp1wMxHF6nhA2yQE5SKiPAdy\"]}},\"version\":1}", 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}, "nodeType": "YulExpressionStatement", "src": "1924:15:56" }, { "expression": { "arguments": [ { "kind": "number", "nodeType": "YulLiteral", "src": "1959:1:56", "type": "", "value": "0" }, { "kind": "number", "nodeType": "YulLiteral", "src": "1962:4:56", "type": "", "value": "0x24" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "1952:6:56" }, "nodeType": "YulFunctionCall", "src": "1952:15:56" }, "nodeType": "YulExpressionStatement", "src": "1952:15:56" } ] }, "condition": { "arguments": [ { "name": "outOfPlaceEncoding", "nodeType": "YulIdentifier", "src": "1822:18:56" }, { "arguments": [ { "name": "length", "nodeType": "YulIdentifier", "src": "1845:6:56" }, { "kind": "number", "nodeType": "YulLiteral", "src": "1853:2:56", "type": "", "value": "32" } ], "functionName": { "name": "lt", "nodeType": "YulIdentifier", "src": "1842:2:56" }, "nodeType": "YulFunctionCall", "src": "1842:14:56" } ], "functionName": { "name": "eq", "nodeType": "YulIdentifier", "src": "1819:2:56" }, "nodeType": "YulFunctionCall", "src": "1819:38:56" }, "nodeType": "YulIf", "src": "1816:161:56" } ] }, "name": "extract_byte_array_length", "nodeType": "YulFunctionDefinition", "parameters": [ { "name": "data", "nodeType": "YulTypedName", "src": "1638:4:56", "type": "" } ], "returnVariables": [ { "name": "length", "nodeType": "YulTypedName", "src": "1647:6:56", "type": "" } ], "src": "1603:380:56" } ] }, "contents": "{\n { }\n function panic_error_0x41()\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x41)\n revert(0, 0x24)\n }\n function abi_decode_string_fromMemory(offset, end) -> array\n {\n if iszero(slt(add(offset, 0x1f), end)) { revert(0, 0) }\n let _1 := mload(offset)\n let _2 := sub(shl(64, 1), 1)\n if gt(_1, _2) { panic_error_0x41() }\n let _3 := not(31)\n let memPtr := mload(64)\n let newFreePtr := add(memPtr, and(add(and(add(_1, 0x1f), _3), 63), _3))\n if or(gt(newFreePtr, _2), lt(newFreePtr, memPtr)) { panic_error_0x41() }\n mstore(64, newFreePtr)\n mstore(memPtr, _1)\n let _4 := 0x20\n if gt(add(add(offset, _1), _4), end) { revert(0, 0) }\n let i := 0\n for { } lt(i, _1) { i := add(i, _4) }\n {\n mstore(add(add(memPtr, i), _4), mload(add(add(offset, i), _4)))\n }\n if gt(i, _1)\n {\n mstore(add(add(memPtr, _1), _4), 0)\n }\n array := memPtr\n }\n function abi_decode_tuple_t_string_memory_ptrt_string_memory_ptr_fromMemory(headStart, dataEnd) -> value0, value1\n {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n let offset := mload(headStart)\n let _1 := sub(shl(64, 1), 1)\n if gt(offset, _1) { revert(0, 0) }\n value0 := abi_decode_string_fromMemory(add(headStart, offset), dataEnd)\n let offset_1 := mload(add(headStart, 32))\n if gt(offset_1, _1) { revert(0, 0) }\n value1 := abi_decode_string_fromMemory(add(headStart, offset_1), dataEnd)\n }\n function extract_byte_array_length(data) -> length\n {\n length := shr(1, data)\n let outOfPlaceEncoding := and(data, 1)\n if iszero(outOfPlaceEncoding) { length := and(length, 0x7f) }\n if eq(outOfPlaceEncoding, lt(length, 32))\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x22)\n revert(0, 0x24)\n }\n }\n}", "id": 56, "language": "Yul", "name": "#utility.yul" } ], "deployedGeneratedSources": [ { "ast": { "nodeType": "YulBlock", "src": "0:12309:56", "statements": [ { "nodeType": "YulBlock", "src": "6:3:56", "statements": [] }, { "body": { "nodeType": "YulBlock", "src": "58:87:56", "statements": [ { "body": { "nodeType": "YulBlock", "src": "123:16:56", "statements": [ { "expression": { "arguments": [ { "kind": "number", "nodeType": "YulLiteral", "src": "132:1:56", "type": "", "value": "0" }, { "kind": "number", "nodeType": "YulLiteral", "src": "135:1:56", "type": "", "value": "0" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "125:6:56" }, "nodeType": "YulFunctionCall", "src": "125:12:56" }, "nodeType": "YulExpressionStatement", "src": "125:12:56" } ] }, "condition": { "arguments": [ { "arguments": [ { "name": "value", "nodeType": 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"expression": { "arguments": [ { "kind": "number", "nodeType": "YulLiteral", "src": "12193:1:56", "type": "", "value": "0" }, { "kind": "number", "nodeType": "YulLiteral", "src": "12196:1:56", "type": "", "value": "0" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "12186:6:56" }, "nodeType": "YulFunctionCall", "src": "12186:12:56" }, "nodeType": "YulExpressionStatement", "src": "12186:12:56" } ] }, "condition": { "arguments": [ { "arguments": [ { "name": "dataEnd", "nodeType": "YulIdentifier", "src": "12159:7:56" }, { "name": "headStart", "nodeType": "YulIdentifier", "src": "12168:9:56" } ], "functionName": { "name": "sub", "nodeType": "YulIdentifier", "src": "12155:3:56" }, "nodeType": "YulFunctionCall", "src": "12155:23:56" }, { "kind": "number", "nodeType": "YulLiteral", "src": "12180:2:56", "type": "", "value": "32" } ], "functionName": { "name": "slt", "nodeType": "YulIdentifier", "src": "12151:3:56" }, "nodeType": "YulFunctionCall", "src": "12151:32:56" }, "nodeType": "YulIf", "src": "12148:52:56" }, { "nodeType": "YulVariableDeclaration", "src": "12209:29:56", "value": { "arguments": [ { "name": "headStart", "nodeType": "YulIdentifier", "src": "12228:9:56" } ], "functionName": { "name": "mload", "nodeType": "YulIdentifier", "src": "12222:5:56" }, "nodeType": "YulFunctionCall", "src": "12222:16:56" }, "variables": [ { "name": "value", "nodeType": "YulTypedName", "src": "12213:5:56", "type": "" } ] }, { "expression": { "arguments": [ { "name": "value", "nodeType": "YulIdentifier", "src": "12271:5:56" } ], "functionName": { "name": "validator_revert_bytes4", "nodeType": "YulIdentifier", "src": "12247:23:56" }, "nodeType": "YulFunctionCall", "src": "12247:30:56" }, "nodeType": "YulExpressionStatement", "src": "12247:30:56" }, { "nodeType": "YulAssignment", "src": "12286:15:56", "value": { "name": "value", "nodeType": "YulIdentifier", "src": "12296:5:56" }, "variableNames": [ { "name": "value0", "nodeType": "YulIdentifier", "src": "12286:6:56" } ] } ] }, "name": "abi_decode_tuple_t_bytes4_fromMemory", "nodeType": "YulFunctionDefinition", "parameters": [ { "name": "headStart", "nodeType": "YulTypedName", "src": "12104:9:56", "type": "" }, { "name": "dataEnd", "nodeType": "YulTypedName", "src": "12115:7:56", "type": "" } ], "returnVariables": [ { "name": "value0", "nodeType": "YulTypedName", "src": "12127:6:56", "type": "" } ], "src": "12058:249:56" } ] }, "contents": "{\n { }\n function validator_revert_bytes4(value)\n {\n if iszero(eq(value, and(value, shl(224, 0xffffffff)))) { revert(0, 0) }\n }\n function abi_decode_tuple_t_bytes4(headStart, dataEnd) -> value0\n {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n let value := calldataload(headStart)\n validator_revert_bytes4(value)\n value0 := value\n }\n function abi_encode_tuple_t_bool__to_t_bool__fromStack_reversed(headStart, value0) -> tail\n {\n tail := add(headStart, 32)\n mstore(headStart, iszero(iszero(value0)))\n }\n function copy_memory_to_memory(src, dst, length)\n {\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) { mstore(add(dst, length), 0) }\n }\n function abi_encode_string(value, pos) -> end\n {\n let length := mload(value)\n mstore(pos, length)\n copy_memory_to_memory(add(value, 0x20), add(pos, 0x20), length)\n end := add(add(pos, and(add(length, 31), not(31))), 0x20)\n }\n function abi_encode_tuple_t_string_memory_ptr__to_t_string_memory_ptr__fromStack_reversed(headStart, value0) -> tail\n {\n mstore(headStart, 32)\n tail := abi_encode_string(value0, add(headStart, 32))\n }\n function abi_decode_tuple_t_uint256(headStart, dataEnd) -> value0\n {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n value0 := calldataload(headStart)\n }\n function abi_encode_tuple_t_address__to_t_address__fromStack_reversed(headStart, value0) -> tail\n {\n tail := add(headStart, 32)\n mstore(headStart, and(value0, sub(shl(160, 1), 1)))\n }\n function abi_decode_address(offset) -> value\n {\n value := calldataload(offset)\n if iszero(eq(value, and(value, sub(shl(160, 1), 1)))) { revert(0, 0) }\n }\n function abi_decode_tuple_t_addresst_uint256(headStart, dataEnd) -> value0, value1\n {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n value1 := calldataload(add(headStart, 32))\n }\n function abi_decode_tuple_t_addresst_addresst_uint256(headStart, dataEnd) -> value0, value1, value2\n {\n if slt(sub(dataEnd, headStart), 96) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n value1 := abi_decode_address(add(headStart, 32))\n value2 := calldataload(add(headStart, 64))\n }\n function abi_decode_tuple_t_address(headStart, dataEnd) -> value0\n {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n }\n function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart, value0) -> tail\n {\n tail := add(headStart, 32)\n mstore(headStart, value0)\n }\n function abi_decode_tuple_t_addresst_bool(headStart, dataEnd) -> value0, value1\n {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n let value := calldataload(add(headStart, 32))\n if iszero(eq(value, iszero(iszero(value)))) { revert(0, 0) }\n value1 := value\n }\n function panic_error_0x41()\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x41)\n revert(0, 0x24)\n }\n function abi_decode_tuple_t_addresst_addresst_uint256t_bytes_memory_ptr(headStart, dataEnd) -> value0, value1, value2, value3\n {\n if slt(sub(dataEnd, headStart), 128) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n value1 := abi_decode_address(add(headStart, 32))\n value2 := calldataload(add(headStart, 64))\n let offset := calldataload(add(headStart, 96))\n let _1 := 0xffffffffffffffff\n if gt(offset, _1) { revert(0, 0) }\n let _2 := add(headStart, offset)\n if iszero(slt(add(_2, 0x1f), dataEnd)) { revert(0, 0) }\n let _3 := calldataload(_2)\n if gt(_3, _1) { panic_error_0x41() }\n let _4 := not(31)\n let memPtr := mload(64)\n let newFreePtr := add(memPtr, and(add(and(add(_3, 0x1f), _4), 63), _4))\n if or(gt(newFreePtr, _1), lt(newFreePtr, memPtr)) { panic_error_0x41() }\n mstore(64, newFreePtr)\n mstore(memPtr, _3)\n if gt(add(add(_2, _3), 32), dataEnd) { revert(0, 0) }\n calldatacopy(add(memPtr, 32), add(_2, 32), _3)\n mstore(add(add(memPtr, _3), 32), 0)\n value3 := memPtr\n }\n function abi_decode_tuple_t_addresst_address(headStart, dataEnd) -> value0, value1\n {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n value1 := abi_decode_address(add(headStart, 32))\n }\n function extract_byte_array_length(data) -> length\n {\n length := shr(1, data)\n let outOfPlaceEncoding := and(data, 1)\n if iszero(outOfPlaceEncoding) { length := and(length, 0x7f) }\n if eq(outOfPlaceEncoding, lt(length, 32))\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x22)\n revert(0, 0x24)\n }\n }\n function abi_encode_tuple_t_stringliteral_9291e0f44949204f2e9b40e6be090924979d6047b2365868f4e9f027722eb89d__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 44)\n mstore(add(headStart, 64), \"ERC721: approved query for nonex\")\n mstore(add(headStart, 96), \"istent token\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_b51b4875eede07862961e8f9365c6749f5fe55c6ee5d7a9e42b6912ad0b15942__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 33)\n mstore(add(headStart, 64), \"ERC721: approval to current owne\")\n mstore(add(headStart, 96), \"r\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_6d83cef3e0cb19b8320a9c5feb26b56bbb08f152a8e61b12eca3302d8d68b23d__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 56)\n mstore(add(headStart, 64), \"ERC721: approve caller is not ow\")\n mstore(add(headStart, 96), \"ner nor approved for all\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_c8682f3ad98807db59a6ec6bb812b72fed0a66e3150fa8239699ee83885247f2__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 49)\n mstore(add(headStart, 64), \"ERC721: transfer caller is not o\")\n mstore(add(headStart, 96), \"wner nor approved\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_7481f3df2a424c0755a1ad2356614e9a5a358d461ea2eae1f89cb21cbad00397__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 41)\n mstore(add(headStart, 64), \"ERC721: owner query for nonexist\")\n mstore(add(headStart, 96), \"ent token\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_7395d4d3901c50cdfcab223d072f9aa36241df5d883e62cbf147ee1b05a9e6ba__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 42)\n mstore(add(headStart, 64), \"ERC721: balance query for the ze\")\n mstore(add(headStart, 96), \"ro address\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_a2d45c0fba603d40d82d590051761ca952d1ab9d78cca6d0d464d7b6e961a9cb__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 47)\n mstore(add(headStart, 64), \"ERC721Metadata: URI query for no\")\n mstore(add(headStart, 96), \"nexistent token\")\n tail := add(headStart, 128)\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 let length := mload(value0)\n copy_memory_to_memory(add(value0, 0x20), pos, length)\n let end_1 := add(pos, length)\n let length_1 := mload(value1)\n copy_memory_to_memory(add(value1, 0x20), end_1, length_1)\n end := add(end_1, length_1)\n }\n function abi_encode_tuple_t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 44)\n mstore(add(headStart, 64), \"ERC721: operator query for nonex\")\n mstore(add(headStart, 96), \"istent token\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 37)\n mstore(add(headStart, 64), \"ERC721: transfer from incorrect \")\n mstore(add(headStart, 96), \"owner\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 36)\n mstore(add(headStart, 64), \"ERC721: transfer to the zero add\")\n mstore(add(headStart, 96), \"ress\")\n tail := add(headStart, 128)\n }\n function panic_error_0x11()\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x11)\n revert(0, 0x24)\n }\n function checked_sub_t_uint256(x, y) -> diff\n {\n if lt(x, y) { panic_error_0x11() }\n diff := sub(x, y)\n }\n function checked_add_t_uint256(x, y) -> sum\n {\n if gt(x, not(y)) { panic_error_0x11() }\n sum := add(x, y)\n }\n function abi_encode_tuple_t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 25)\n mstore(add(headStart, 64), \"ERC721: approve to caller\")\n tail := add(headStart, 96)\n }\n function abi_encode_tuple_t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 50)\n mstore(add(headStart, 64), \"ERC721: transfer to non ERC721Re\")\n mstore(add(headStart, 96), \"ceiver implementer\")\n tail := add(headStart, 128)\n }\n function increment_t_uint256(value) -> ret\n {\n if eq(value, not(0)) { panic_error_0x11() }\n ret := add(value, 1)\n }\n function panic_error_0x12()\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x12)\n revert(0, 0x24)\n }\n function checked_div_t_uint256(x, y) -> r\n {\n if iszero(y) { panic_error_0x12() }\n r := div(x, y)\n }\n function mod_t_uint256(x, y) -> r\n {\n if iszero(y) { panic_error_0x12() }\n r := mod(x, y)\n }\n function panic_error_0x32()\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x32)\n revert(0, 0x24)\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 {\n let _1 := sub(shl(160, 1), 1)\n mstore(headStart, and(value0, _1))\n mstore(add(headStart, 32), and(value1, _1))\n mstore(add(headStart, 64), value2)\n mstore(add(headStart, 96), 128)\n tail := abi_encode_string(value3, add(headStart, 128))\n }\n function abi_decode_tuple_t_bytes4_fromMemory(headStart, dataEnd) -> value0\n {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n let value := mload(headStart)\n validator_revert_bytes4(value)\n value0 := value\n }\n}", "id": 56, "language": "Yul", "name": "#utility.yul" } ], "sourceMap": 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"source": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)\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 _setApprovalForAll(_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 _afterTokenTransfer(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 _afterTokenTransfer(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 from incorrect owner\");\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 _afterTokenTransfer(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 Approve `operator` to operate on all of `owner` tokens\n *\n * Emits a {ApprovalForAll} event.\n */\n function _setApprovalForAll(\n address owner,\n address operator,\n bool approved\n ) internal virtual {\n require(owner != operator, \"ERC721: approve to caller\");\n _operatorApprovals[owner][operator] = approved;\n emit ApprovalForAll(owner, operator, approved);\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 /**\n * @dev Hook that is called after any transfer of tokens. This includes\n * minting and burning.\n *\n * Calling conditions:\n *\n * - when `from` and `to` are both non-zero.\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 _afterTokenTransfer(\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": [ 5275 ], "Context": [ 5297 ], "ERC165": [ 6252 ], "ERC721": [ 4661 ], "IERC165": [ 6264 ], "IERC721": [ 4777 ], "IERC721Metadata": [ 4980 ], "IERC721Receiver": [ 4795 ], "Strings": [ 5574 ] }, "id": 4662, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 3797, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "107:23:20" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721.sol", "file": "./IERC721.sol", "id": 3798, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 4778, "src": "132:23:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol", "file": "./IERC721Receiver.sol", "id": 3799, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 4796, "src": "156:31:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol", "file": "./extensions/IERC721Metadata.sol", "id": 3800, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 4981, "src": "188:42:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Address.sol", "file": "../../utils/Address.sol", "id": 3801, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 5276, "src": "231:33:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Context.sol", "file": "../../utils/Context.sol", "id": 3802, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 5298, "src": "265:33:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Strings.sol", "file": "../../utils/Strings.sol", "id": 3803, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 5575, "src": "299:33:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/introspection/ERC165.sol", "file": "../../utils/introspection/ERC165.sol", "id": 3804, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 6253, "src": "333:46:20", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 3806, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 5297, "src": "647:7:20" }, "id": 3807, "nodeType": "InheritanceSpecifier", "src": "647:7:20" }, { "baseName": { "id": 3808, "name": "ERC165", "nodeType": "IdentifierPath", "referencedDeclaration": 6252, "src": "656:6:20" }, "id": 3809, "nodeType": "InheritanceSpecifier", "src": "656:6:20" }, { "baseName": { "id": 3810, "name": "IERC721", "nodeType": "IdentifierPath", "referencedDeclaration": 4777, "src": "664:7:20" }, "id": 3811, "nodeType": "InheritanceSpecifier", "src": "664:7:20" }, { "baseName": { "id": 3812, "name": "IERC721Metadata", "nodeType": "IdentifierPath", "referencedDeclaration": 4980, "src": "673:15:20" }, "id": 3813, "nodeType": "InheritanceSpecifier", "src": "673:15:20" } ], "canonicalName": "ERC721", "contractDependencies": [], "contractKind": "contract", "documentation": { "id": 3805, "nodeType": "StructuredDocumentation", "src": "381:246:20", "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": 4661, "linearizedBaseContracts": [ 4661, 4980, 4777, 6252, 6264, 5297 ], "name": "ERC721", "nameLocation": "637:6:20", "nodeType": "ContractDefinition", "nodes": [ { "id": 3816, "libraryName": { "id": 3814, "name": "Address", "nodeType": "IdentifierPath", "referencedDeclaration": 5275, "src": "701:7:20" }, "nodeType": "UsingForDirective", "src": "695:26:20", "typeName": { "id": 3815, "name": "address", "nodeType": "ElementaryTypeName", "src": "713:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, { "id": 3819, "libraryName": { "id": 3817, "name": "Strings", "nodeType": "IdentifierPath", "referencedDeclaration": 5574, "src": "732:7:20" }, "nodeType": "UsingForDirective", "src": "726:26:20", "typeName": { "id": 3818, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "744:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "constant": false, "id": 3821, "mutability": "mutable", "name": "_name", "nameLocation": "791:5:20", "nodeType": "VariableDeclaration", "scope": 4661, "src": "776:20:20", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 3820, "name": "string", "nodeType": "ElementaryTypeName", "src": "776:6:20", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 3823, "mutability": "mutable", "name": "_symbol", "nameLocation": "838:7:20", "nodeType": "VariableDeclaration", "scope": 4661, "src": "823:22:20", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 3822, "name": "string", "nodeType": "ElementaryTypeName", "src": "823:6:20", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 3827, "mutability": "mutable", "name": "_owners", "nameLocation": "934:7:20", "nodeType": "VariableDeclaration", "scope": 4661, "src": "898:43:20", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "typeName": { "id": 3826, "keyType": { "id": 3824, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "906:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Mapping", "src": "898:27:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "valueType": { "id": 3825, "name": "address", "nodeType": "ElementaryTypeName", "src": "917:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "visibility": "private" }, { "constant": false, "id": 3831, "mutability": "mutable", "name": "_balances", "nameLocation": "1028:9:20", "nodeType": "VariableDeclaration", "scope": 4661, "src": "992:45:20", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 3830, "keyType": { "id": 3828, "name": "address", "nodeType": "ElementaryTypeName", "src": "1000:7:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "992:27:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 3829, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1011:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "visibility": "private" }, { "constant": false, "id": 3835, "mutability": "mutable", "name": "_tokenApprovals", "nameLocation": "1129:15:20", "nodeType": "VariableDeclaration", "scope": 4661, "src": "1093:51:20", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "typeName": { "id": 3834, "keyType": { "id": 3832, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1101:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Mapping", "src": "1093:27:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" }, "valueType": { "id": 3833, "name": "address", "nodeType": "ElementaryTypeName", "src": "1112:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "visibility": "private" }, { "constant": false, "id": 3841, "mutability": "mutable", "name": "_operatorApprovals", "nameLocation": "1252:18:20", "nodeType": "VariableDeclaration", "scope": 4661, "src": "1199:71:20", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" }, "typeName": { "id": 3840, "keyType": { "id": 3836, "name": "address", "nodeType": "ElementaryTypeName", "src": "1207:7:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1199:44:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" }, "valueType": { "id": 3839, "keyType": { "id": 3837, "name": 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"tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4194, "src": "6779:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 4210, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4196, "src": "6788:5:20", "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": 4206, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4638, "src": "6746:22:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 4211, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6746:48:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 4212, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6796:52:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" }, "value": "ERC721: transfer to non ERC721Receiver implementer" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" } ], "id": 4205, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "6738:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4213, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6738:111:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4214, "nodeType": "ExpressionStatement", "src": "6738:111:20" } ] }, "documentation": { "id": 4188, "nodeType": "StructuredDocumentation", "src": "5693:851:20", "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": 4216, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeTransfer", "nameLocation": "6558:13:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4197, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4190, "mutability": "mutable", "name": "from", "nameLocation": "6589:4:20", "nodeType": "VariableDeclaration", "scope": 4216, "src": "6581:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4189, "name": "address", "nodeType": "ElementaryTypeName", "src": "6581:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4192, "mutability": "mutable", "name": "to", "nameLocation": "6611:2:20", "nodeType": "VariableDeclaration", "scope": 4216, "src": "6603:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4191, "name": "address", "nodeType": "ElementaryTypeName", "src": "6603:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4194, "mutability": "mutable", "name": "tokenId", "nameLocation": "6631:7:20", "nodeType": "VariableDeclaration", "scope": 4216, "src": "6623:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4193, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6623:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 4196, "mutability": "mutable", "name": "_data", "nameLocation": "6661:5:20", "nodeType": "VariableDeclaration", "scope": 4216, "src": "6648:18:20", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4195, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "6648:5:20", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "6571:101:20" }, "returnParameters": { "id": 4198, "nodeType": "ParameterList", "parameters": [], "src": "6690:0:20" }, "scope": 4661, "src": "6549:307:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4233, "nodeType": "Block", "src": "7230:54:20", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4231, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "baseExpression": { "id": 4224, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3827, "src": "7247:7:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4226, "indexExpression": { "id": 4225, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4219, "src": "7255:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7247:16:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 4229, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7275:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 4228, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7267:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4227, "name": "address", "nodeType": "ElementaryTypeName", "src": "7267:7:20", "typeDescriptions": {} } }, "id": 4230, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7267:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7247:30:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 4223, "id": 4232, "nodeType": "Return", "src": "7240:37:20" } ] }, "documentation": { "id": 4217, "nodeType": "StructuredDocumentation", "src": "6862:292:20", "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": 4234, "implemented": true, "kind": "function", "modifiers": [], "name": "_exists", "nameLocation": "7168:7:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4220, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4219, "mutability": "mutable", "name": "tokenId", "nameLocation": "7184:7:20", "nodeType": "VariableDeclaration", "scope": 4234, "src": "7176:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4218, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7176:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7175:17:20" }, "returnParameters": { "id": 4223, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4222, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 4234, "src": "7224:4:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 4221, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7224:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7223:6:20" }, "scope": 4661, "src": "7159:125:20", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 4274, "nodeType": "Block", "src": "7541:245:20", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "id": 4246, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4239, "src": "7567:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4245, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4234, "src": "7559:7:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 4247, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7559:16:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a206f70657261746f7220717565727920666f72206e6f6e6578697374656e7420746f6b656e", "id": 4248, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7577:46:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c", "typeString": "literal_string \"ERC721: operator query for nonexistent token\"" }, "value": "ERC721: operator query for nonexistent token" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c", "typeString": "literal_string \"ERC721: operator query for nonexistent token\"" } ], "id": 4244, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "7551:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4249, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7551:73:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4250, "nodeType": "ExpressionStatement", "src": "7551:73:20" }, { "assignments": [ 4252 ], "declarations": [ { "constant": false, "id": 4252, "mutability": "mutable", "name": "owner", "nameLocation": "7642:5:20", "nodeType": "VariableDeclaration", "scope": 4274, "src": "7634:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4251, "name": "address", "nodeType": "ElementaryTypeName", "src": "7634:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 4257, "initialValue": { "arguments": [ { "id": 4255, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4239, "src": "7665:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 4253, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4661, "src": "7650:6:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$4661_$", "typeString": "type(contract ERC721)" } }, "id": 4254, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 3941, "src": "7650:14:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4256, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7650:23:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7634:39:20" }, { "expression": { "components": [ { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 4271, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 4266, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4260, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4258, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4237, "src": "7691:7:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 4259, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4252, "src": "7702:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7691:16:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4265, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 4262, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4239, "src": "7723:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4261, "name": "getApproved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4076, "src": "7711:11:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4263, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7711:20:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 4264, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4237, "src": "7735:7:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7711:31:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7691:51:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "arguments": [ { "id": 4268, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4252, "src": "7763:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4269, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4237, "src": "7770:7:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 4267, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4111, "src": "7746:16:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 4270, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7746:32:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7691:87:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 4272, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "7690:89:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 4243, "id": 4273, "nodeType": "Return", "src": "7683:96:20" } ] }, "documentation": { "id": 4235, "nodeType": "StructuredDocumentation", "src": "7290:147:20", "text": " @dev Returns whether `spender` is allowed to manage `tokenId`.\n Requirements:\n - `tokenId` must exist." }, "id": 4275, "implemented": true, "kind": "function", "modifiers": [], "name": "_isApprovedOrOwner", "nameLocation": "7451:18:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4240, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4237, "mutability": "mutable", "name": "spender", "nameLocation": "7478:7:20", "nodeType": "VariableDeclaration", "scope": 4275, "src": "7470:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4236, "name": "address", "nodeType": "ElementaryTypeName", "src": "7470:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4239, "mutability": "mutable", "name": "tokenId", "nameLocation": "7495:7:20", "nodeType": "VariableDeclaration", "scope": 4275, "src": "7487:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4238, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7487:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7469:34:20" }, "returnParameters": { "id": 4243, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4242, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 4275, "src": "7535:4:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 4241, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7535:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7534:6:20" }, "scope": 4661, "src": "7442:344:20", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 4289, "nodeType": "Block", "src": "8181:43:20", "statements": [ { "expression": { "arguments": [ { "id": 4284, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4278, "src": "8201:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4285, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4280, "src": "8205:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "", "id": 4286, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8214:2:20", "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": 4283, "name": "_safeMint", "nodeType": "Identifier", "overloadedDeclarations": [ 4290, 4319 ], "referencedDeclaration": 4319, "src": "8191:9:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,uint256,bytes memory)" } }, "id": 4287, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8191:26:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4288, "nodeType": "ExpressionStatement", "src": "8191:26:20" } ] }, "documentation": { "id": 4276, "nodeType": "StructuredDocumentation", "src": "7792:319:20", "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": 4290, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nameLocation": "8125:9:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4281, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4278, "mutability": "mutable", "name": "to", "nameLocation": "8143:2:20", "nodeType": "VariableDeclaration", "scope": 4290, "src": "8135:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4277, "name": "address", "nodeType": "ElementaryTypeName", "src": "8135:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4280, "mutability": "mutable", "name": "tokenId", "nameLocation": "8155:7:20", "nodeType": "VariableDeclaration", "scope": 4290, "src": "8147:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4279, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8147:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8134:29:20" }, "returnParameters": { "id": 4282, "nodeType": "ParameterList", "parameters": [], "src": "8181:0:20" }, "scope": 4661, "src": "8116:108:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4318, "nodeType": "Block", "src": "8560:196:20", "statements": [ { "expression": { "arguments": [ { "id": 4301, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4293, "src": "8576:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4302, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4295, "src": "8580:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4300, "name": "_mint", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4385, "src": "8570:5:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 4303, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8570:18:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4304, "nodeType": "ExpressionStatement", "src": "8570:18:20" }, { "expression": { "arguments": [ { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4309, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8650:1:20", "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": 4308, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8642:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4307, "name": "address", "nodeType": "ElementaryTypeName", "src": "8642:7:20", "typeDescriptions": {} } }, "id": 4310, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8642:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4311, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4293, "src": "8654:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4312, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4295, "src": "8658:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 4313, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4297, "src": "8667:5:20", "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": 4306, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4638, "src": "8619:22:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 4314, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8619:54:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 4315, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8687:52:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" }, "value": "ERC721: transfer to non ERC721Receiver implementer" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" } ], "id": 4305, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "8598:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4316, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8598:151:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4317, "nodeType": "ExpressionStatement", "src": "8598:151:20" } ] }, "documentation": { "id": 4291, "nodeType": "StructuredDocumentation", "src": "8230:210:20", "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": 4319, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nameLocation": "8454:9:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4298, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4293, "mutability": "mutable", "name": "to", "nameLocation": "8481:2:20", "nodeType": "VariableDeclaration", "scope": 4319, "src": "8473:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4292, "name": "address", "nodeType": "ElementaryTypeName", "src": "8473:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4295, "mutability": "mutable", "name": "tokenId", "nameLocation": "8501:7:20", "nodeType": "VariableDeclaration", "scope": 4319, "src": "8493:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4294, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8493:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 4297, "mutability": "mutable", "name": "_data", "nameLocation": "8531:5:20", "nodeType": "VariableDeclaration", "scope": 4319, "src": "8518:18:20", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4296, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "8518:5:20", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "8463:79:20" }, "returnParameters": { "id": 4299, "nodeType": "ParameterList", "parameters": [], "src": "8560:0:20" }, "scope": 4661, "src": "8445:311:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4384, "nodeType": "Block", "src": "9139:366:20", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4333, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4328, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9157:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 4331, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9171:1:20", "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": 4330, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9163:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4329, "name": "address", "nodeType": "ElementaryTypeName", "src": "9163:7:20", "typeDescriptions": {} } }, "id": 4332, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9163:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9157:16:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a206d696e7420746f20746865207a65726f2061646472657373", "id": 4334, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9175:34:20", "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": 4327, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9149:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4335, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9149:61:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4336, "nodeType": "ExpressionStatement", "src": "9149:61:20" }, { "expression": { "arguments": [ { "id": 4341, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "9228:17:20", "subExpression": { "arguments": [ { "id": 4339, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9237:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4338, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4234, "src": "9229:7:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 4340, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9229:16:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a20746f6b656e20616c7265616479206d696e746564", "id": 4342, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9247:30:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" }, "value": "ERC721: token already minted" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" } ], "id": 4337, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9220:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4343, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9220:58:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4344, "nodeType": "ExpressionStatement", "src": "9220:58:20" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4348, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9318:1:20", "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": 4347, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9310:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4346, "name": "address", "nodeType": "ElementaryTypeName", "src": "9310:7:20", "typeDescriptions": {} } }, "id": 4349, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9310:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4350, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9322:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4351, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9326:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4345, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4649, "src": "9289:20:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4352, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9289:45:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4353, "nodeType": "ExpressionStatement", "src": "9289:45:20" }, { "expression": { "id": 4358, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4354, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3831, "src": "9345:9:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4356, "indexExpression": { "id": 4355, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9355:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9345:13:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "hexValue": "31", "id": 4357, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9362:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "9345:18:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4359, "nodeType": "ExpressionStatement", "src": "9345:18:20" }, { "expression": { "id": 4364, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4360, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3827, "src": "9373:7:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4362, "indexExpression": { "id": 4361, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9381:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9373:16:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 4363, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9392:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9373:21:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 4365, "nodeType": "ExpressionStatement", "src": "9373:21:20" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4369, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9427:1:20", "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": 4368, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9419:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4367, "name": "address", "nodeType": "ElementaryTypeName", "src": "9419:7:20", "typeDescriptions": {} } }, "id": 4370, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9419:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4371, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9431:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4372, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9435:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4366, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4676, "src": "9410:8:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4373, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9410:33:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4374, "nodeType": "EmitStatement", "src": "9405:38:20" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4378, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9482:1:20", "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": 4377, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9474:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4376, "name": "address", "nodeType": "ElementaryTypeName", "src": "9474:7:20", "typeDescriptions": {} } }, "id": 4379, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9474:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4380, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9486:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4381, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9490:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4375, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4660, "src": "9454:19:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4382, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9454:44:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4383, "nodeType": "ExpressionStatement", "src": "9454:44:20" } ] }, "documentation": { "id": 4320, "nodeType": "StructuredDocumentation", "src": "8762:311:20", "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": 4385, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nameLocation": "9087:5:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4325, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4322, "mutability": "mutable", "name": "to", "nameLocation": "9101:2:20", "nodeType": "VariableDeclaration", "scope": 4385, "src": "9093:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4321, "name": "address", "nodeType": "ElementaryTypeName", "src": "9093:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4324, "mutability": "mutable", "name": "tokenId", "nameLocation": "9113:7:20", "nodeType": "VariableDeclaration", "scope": 4385, "src": "9105:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4323, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9105:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9092:29:20" }, "returnParameters": { "id": 4326, "nodeType": "ParameterList", "parameters": [], "src": "9139:0:20" }, "scope": 4661, "src": "9078:427:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4444, "nodeType": "Block", "src": "9771:357:20", "statements": [ { "assignments": [ 4392 ], "declarations": [ { "constant": false, "id": 4392, "mutability": "mutable", "name": "owner", "nameLocation": "9789:5:20", "nodeType": "VariableDeclaration", "scope": 4444, "src": "9781:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4391, "name": "address", "nodeType": "ElementaryTypeName", "src": "9781:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 4397, "initialValue": { "arguments": [ { "id": 4395, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "9812:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 4393, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4661, "src": "9797:6:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$4661_$", "typeString": "type(contract ERC721)" } }, "id": 4394, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 3941, "src": "9797:14:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4396, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9797:23:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "9781:39:20" }, { "expression": { "arguments": [ { "id": 4399, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4392, "src": "9852:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 4402, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9867:1:20", "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": 4401, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9859:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4400, "name": "address", "nodeType": "ElementaryTypeName", "src": "9859:7:20", "typeDescriptions": {} } }, "id": 4403, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9859:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4404, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "9871:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4398, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4649, "src": "9831:20:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4405, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9831:48:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4406, "nodeType": "ExpressionStatement", "src": "9831:48:20" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4410, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9934:1:20", "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": 4409, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9926:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4408, "name": "address", "nodeType": "ElementaryTypeName", "src": "9926:7:20", "typeDescriptions": {} } }, "id": 4411, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9926:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4412, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "9938:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4407, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4544, "src": "9917:8:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 4413, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9917:29:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4414, "nodeType": "ExpressionStatement", "src": "9917:29:20" }, { "expression": { "id": 4419, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4415, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3831, "src": "9957:9:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4417, "indexExpression": { "id": 4416, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4392, "src": "9967:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9957:16:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "hexValue": "31", "id": 4418, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9977:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "9957:21:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4420, "nodeType": "ExpressionStatement", "src": "9957:21:20" }, { "expression": { "id": 4424, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "delete", "prefix": true, "src": "9988:23:20", "subExpression": { "baseExpression": { "id": 4421, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3827, "src": "9995:7:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4423, "indexExpression": { "id": 4422, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "10003:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9995:16:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4425, "nodeType": "ExpressionStatement", "src": "9988:23:20" }, { "eventCall": { "arguments": [ { "id": 4427, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4392, "src": "10036:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 4430, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10051:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 4429, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10043:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4428, "name": "address", "nodeType": "ElementaryTypeName", "src": "10043:7:20", "typeDescriptions": {} } }, "id": 4431, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10043:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4432, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "10055:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4426, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4676, "src": "10027:8:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4433, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10027:36:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4434, "nodeType": "EmitStatement", "src": "10022:41:20" }, { "expression": { "arguments": [ { "id": 4436, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4392, "src": "10094:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 4439, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10109:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 4438, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10101:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4437, "name": "address", "nodeType": "ElementaryTypeName", "src": "10101:7:20", "typeDescriptions": {} } }, "id": 4440, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10101:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4441, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "10113:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4435, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4660, "src": "10074:19:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4442, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10074:47:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4443, "nodeType": "ExpressionStatement", "src": "10074:47:20" } ] }, "documentation": { "id": 4386, "nodeType": "StructuredDocumentation", "src": "9511:206:20", "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": 4445, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nameLocation": "9731:5:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4389, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4388, "mutability": "mutable", "name": "tokenId", "nameLocation": "9745:7:20", "nodeType": "VariableDeclaration", "scope": 4445, "src": "9737:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4387, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9737:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9736:17:20" }, "returnParameters": { "id": 4390, "nodeType": "ParameterList", "parameters": [], "src": "9771:0:20" }, "scope": 4661, "src": "9722:406:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4519, "nodeType": "Block", "src": "10561:496:20", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4461, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 4458, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10594:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 4456, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4661, "src": "10579:6:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$4661_$", "typeString": "type(contract ERC721)" } }, "id": 4457, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 3941, "src": "10579:14:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4459, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10579:23:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 4460, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "10606:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10579:31:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e736665722066726f6d20696e636f7272656374206f776e6572", "id": 4462, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10612:39:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48", "typeString": "literal_string \"ERC721: transfer from incorrect owner\"" }, "value": "ERC721: transfer from incorrect owner" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48", "typeString": "literal_string \"ERC721: transfer from incorrect owner\"" } ], "id": 4455, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10571:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4463, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10571:81:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4464, "nodeType": "ExpressionStatement", "src": "10571:81:20" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4471, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4466, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10670:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 4469, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10684:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 4468, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10676:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4467, "name": "address", "nodeType": "ElementaryTypeName", "src": "10676:7:20", "typeDescriptions": {} } }, "id": 4470, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10676:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10670:16:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 4472, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10688:38:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" }, "value": "ERC721: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" } ], "id": 4465, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10662:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4473, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10662:65:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4474, "nodeType": "ExpressionStatement", "src": "10662:65:20" }, { "expression": { "arguments": [ { "id": 4476, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "10759:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4477, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10765:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4478, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10769:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4475, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4649, "src": "10738:20:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4479, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10738:39:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4480, "nodeType": "ExpressionStatement", "src": "10738:39:20" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4484, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10856:1:20", "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": 4483, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10848:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4482, "name": "address", "nodeType": "ElementaryTypeName", "src": "10848:7:20", "typeDescriptions": {} } }, "id": 4485, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10848:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4486, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10860:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4481, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4544, "src": "10839:8:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 4487, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10839:29:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4488, "nodeType": "ExpressionStatement", "src": "10839:29:20" }, { "expression": { "id": 4493, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4489, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3831, "src": "10879:9:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4491, "indexExpression": { "id": 4490, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "10889:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10879:15:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "hexValue": "31", "id": 4492, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10898:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "10879:20:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4494, "nodeType": "ExpressionStatement", "src": "10879:20:20" }, { "expression": { "id": 4499, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4495, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3831, "src": "10909:9:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4497, "indexExpression": { "id": 4496, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10919:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10909:13:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "hexValue": "31", "id": 4498, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10926:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "10909:18:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4500, "nodeType": "ExpressionStatement", "src": "10909:18:20" }, { "expression": { "id": 4505, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4501, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3827, "src": "10937:7:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4503, "indexExpression": { "id": 4502, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10945:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10937:16:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 4504, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10956:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10937:21:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 4506, "nodeType": "ExpressionStatement", "src": "10937:21:20" }, { "eventCall": { "arguments": [ { "id": 4508, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "10983:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4509, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10989:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4510, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10993:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4507, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4676, "src": "10974:8:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4511, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10974:27:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4512, "nodeType": "EmitStatement", "src": "10969:32:20" }, { "expression": { "arguments": [ { "id": 4514, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "11032:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4515, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "11038:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4516, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "11042:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4513, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4660, "src": "11012:19:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4517, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11012:38:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4518, "nodeType": "ExpressionStatement", "src": "11012:38:20" } ] }, "documentation": { "id": 4446, "nodeType": "StructuredDocumentation", "src": "10134:313:20", "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": 4520, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nameLocation": "10461:9:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4453, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4448, "mutability": "mutable", "name": "from", "nameLocation": "10488:4:20", "nodeType": "VariableDeclaration", "scope": 4520, "src": "10480:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4447, "name": "address", "nodeType": "ElementaryTypeName", "src": "10480:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4450, "mutability": "mutable", "name": "to", "nameLocation": "10510:2:20", "nodeType": "VariableDeclaration", "scope": 4520, "src": "10502:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4449, "name": "address", "nodeType": "ElementaryTypeName", "src": "10502:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4452, "mutability": "mutable", "name": "tokenId", "nameLocation": "10530:7:20", "nodeType": "VariableDeclaration", "scope": 4520, "src": "10522:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4451, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10522:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10470:73:20" }, "returnParameters": { "id": 4454, "nodeType": "ParameterList", "parameters": [], "src": "10561:0:20" }, "scope": 4661, "src": "10452:605:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4543, "nodeType": "Block", "src": "11232:107:20", "statements": [ { "expression": { "id": 4532, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4528, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3835, "src": "11242:15:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4530, "indexExpression": { "id": 4529, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4525, "src": "11258:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11242:24:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 4531, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4523, "src": "11269:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11242:29:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 4533, "nodeType": "ExpressionStatement", "src": "11242:29:20" }, { "eventCall": { "arguments": [ { "arguments": [ { "id": 4537, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4525, "src": "11310:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 4535, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4661, "src": "11295:6:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$4661_$", "typeString": "type(contract ERC721)" } }, "id": 4536, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 3941, "src": "11295:14:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4538, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11295:23:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4539, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4523, "src": "11320:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4540, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4525, "src": "11324:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4534, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4685, "src": "11286:8:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4541, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11286:46:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4542, "nodeType": "EmitStatement", "src": "11281:51:20" } ] }, "documentation": { "id": 4521, "nodeType": "StructuredDocumentation", "src": "11063:100:20", "text": " @dev Approve `to` to operate on `tokenId`\n Emits a {Approval} event." }, "id": 4544, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nameLocation": "11177:8:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4526, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4523, "mutability": "mutable", "name": "to", "nameLocation": "11194:2:20", "nodeType": "VariableDeclaration", "scope": 4544, "src": "11186:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4522, "name": "address", "nodeType": "ElementaryTypeName", "src": "11186:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4525, "mutability": "mutable", "name": "tokenId", "nameLocation": "11206:7:20", "nodeType": "VariableDeclaration", "scope": 4544, "src": "11198:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4524, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11198:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11185:29:20" }, "returnParameters": { "id": 4527, "nodeType": "ParameterList", "parameters": [], "src": "11232:0:20" }, "scope": 4661, "src": "11168:171:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4575, "nodeType": "Block", "src": "11597:184:20", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4557, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4555, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4547, "src": "11615:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "id": 4556, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4549, "src": "11624:8:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11615:17:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a20617070726f766520746f2063616c6c6572", "id": 4558, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11634:27:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05", "typeString": "literal_string \"ERC721: approve to caller\"" }, "value": "ERC721: approve to caller" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05", "typeString": "literal_string \"ERC721: approve to caller\"" } ], "id": 4554, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "11607:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4559, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11607:55:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4560, "nodeType": "ExpressionStatement", "src": "11607:55:20" }, { "expression": { "id": 4567, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 4561, "name": "_operatorApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3841, "src": "11672:18:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" } }, "id": 4564, "indexExpression": { "id": 4562, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4547, "src": "11691:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "11672:25:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 4565, "indexExpression": { "id": 4563, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4549, "src": "11698:8:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11672:35:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 4566, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4551, "src": "11710:8:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "11672:46:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 4568, "nodeType": "ExpressionStatement", "src": "11672:46:20" }, { "eventCall": { "arguments": [ { "id": 4570, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4547, "src": "11748:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4571, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4549, "src": "11755:8:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4572, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4551, "src": "11765:8:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 4569, "name": "ApprovalForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4694, "src": "11733:14:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_bool_$returns$__$", "typeString": "function (address,address,bool)" } }, "id": 4573, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11733:41:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4574, "nodeType": "EmitStatement", "src": "11728:46:20" } ] }, "documentation": { "id": 4545, "nodeType": "StructuredDocumentation", "src": "11345:124:20", "text": " @dev Approve `operator` to operate on all of `owner` tokens\n Emits a {ApprovalForAll} event." }, "id": 4576, "implemented": true, "kind": "function", "modifiers": [], "name": "_setApprovalForAll", "nameLocation": "11483:18:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4552, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4547, "mutability": "mutable", "name": "owner", "nameLocation": "11519:5:20", "nodeType": "VariableDeclaration", "scope": 4576, "src": "11511:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4546, "name": "address", "nodeType": "ElementaryTypeName", "src": "11511:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4549, "mutability": "mutable", "name": "operator", "nameLocation": "11542:8:20", "nodeType": "VariableDeclaration", "scope": 4576, "src": "11534:16:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4548, "name": "address", "nodeType": "ElementaryTypeName", "src": "11534:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4551, "mutability": "mutable", "name": "approved", "nameLocation": "11565:8:20", "nodeType": "VariableDeclaration", "scope": 4576, "src": "11560:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 4550, "name": "bool", "nodeType": "ElementaryTypeName", "src": "11560:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "11501:78:20" }, "returnParameters": { "id": 4553, "nodeType": "ParameterList", "parameters": [], "src": "11597:0:20" }, "scope": 4661, "src": "11474:307:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4637, "nodeType": "Block", "src": "12490:622:20", "statements": [ { "condition": { "arguments": [], "expression": { "argumentTypes": [], "expression": { "id": 4590, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4581, "src": "12504:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 4591, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "isContract", "nodeType": "MemberAccess", "referencedDeclaration": 4998, "src": "12504:13:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$returns$_t_bool_$bound_to$_t_address_$", "typeString": "function (address) view returns (bool)" } }, "id": 4592, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12504:15:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 4635, "nodeType": "Block", "src": "13070:36:20", "statements": [ { "expression": { "hexValue": "74727565", "id": 4633, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "13091:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 4589, "id": 4634, "nodeType": "Return", "src": "13084:11:20" } ] }, "id": 4636, "nodeType": "IfStatement", "src": "12500:606:20", "trueBody": { "id": 4632, "nodeType": "Block", "src": "12521:543:20", "statements": [ { "clauses": [ { "block": { "id": 4612, "nodeType": "Block", "src": "12636:91:20", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "id": 4610, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4606, "name": "retval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4604, "src": "12661:6:20", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "expression": { "expression": { "id": 4607, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4795, "src": "12671:15:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$4795_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 4608, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 4794, "src": "12671:32:20", "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": 4609, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "12671:41:20", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "src": "12661:51:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 4589, "id": 4611, "nodeType": "Return", "src": "12654:58:20" } ] }, "errorName": "", "id": 4613, "nodeType": "TryCatchClause", "parameters": { "id": 4605, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4604, "mutability": "mutable", "name": "retval", "nameLocation": "12628:6:20", "nodeType": "VariableDeclaration", "scope": 4613, "src": "12621:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 4603, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "12621:6:20", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "visibility": "internal" } ], "src": "12620:15:20" }, "src": "12612:115:20" }, { "block": { "id": 4629, "nodeType": "Block", "src": "12756:298:20", "statements": [ { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 4620, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "expression": { "id": 4617, "name": "reason", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4615, "src": "12778:6:20", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 4618, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "src": "12778:13:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 4619, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12795:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "12778:18:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 4627, "nodeType": "Block", "src": "12905:135:20", "statements": [ { "AST": { "nodeType": "YulBlock", "src": "12936:86:20", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "kind": "number", "nodeType": "YulLiteral", "src": "12973:2:20", "type": "", "value": "32" }, { "name": "reason", "nodeType": "YulIdentifier", "src": "12977:6:20" } ], "functionName": { "name": "add", "nodeType": "YulIdentifier", "src": "12969:3:20" }, "nodeType": "YulFunctionCall", "src": "12969:15:20" }, { "arguments": [ { "name": "reason", "nodeType": "YulIdentifier", "src": "12992:6:20" } ], "functionName": { "name": "mload", "nodeType": "YulIdentifier", "src": "12986:5:20" }, "nodeType": "YulFunctionCall", "src": "12986:13:20" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "12962:6:20" }, "nodeType": "YulFunctionCall", "src": "12962:38:20" }, "nodeType": "YulExpressionStatement", "src": "12962:38:20" } ] }, "evmVersion": "london", "externalReferences": [ { "declaration": 4615, "isOffset": false, "isSlot": false, "src": "12977:6:20", 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"typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "arguments": [ { "id": 4594, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4581, "src": "12555:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 4593, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4795, "src": "12539:15:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$4795_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 4595, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12539:19:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_contract$_IERC721Receiver_$4795", "typeString": "contract IERC721Receiver" } }, "id": 4596, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 4794, "src": "12539:36:20", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bytes4_$", "typeString": "function (address,address,uint256,bytes memory) external returns (bytes4)" } }, "id": 4602, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12539:72:20", "tryCall": true, "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "id": 4631, "nodeType": "TryStatement", "src": "12535:519:20" } ] } } ] }, "documentation": { "id": 4577, "nodeType": "StructuredDocumentation", "src": "11787:542:20", "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": 4638, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkOnERC721Received", "nameLocation": "12343:22:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4586, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4579, "mutability": "mutable", "name": "from", "nameLocation": "12383:4:20", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12375:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4578, "name": "address", "nodeType": "ElementaryTypeName", "src": "12375:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4581, "mutability": "mutable", "name": "to", "nameLocation": "12405:2:20", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12397:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4580, "name": "address", "nodeType": "ElementaryTypeName", "src": "12397:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4583, "mutability": "mutable", "name": "tokenId", "nameLocation": "12425:7:20", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12417:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4582, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12417:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 4585, "mutability": "mutable", "name": "_data", "nameLocation": "12455:5:20", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12442:18:20", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4584, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "12442:5:20", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "12365:101:20" }, "returnParameters": { "id": 4589, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4588, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12484:4:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 4587, "name": "bool", "nodeType": "ElementaryTypeName", "src": "12484:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "12483:6:20" }, "scope": 4661, "src": "12334:778:20", "stateMutability": "nonpayable", "virtual": false, "visibility": "private" }, { "body": { "id": 4648, "nodeType": "Block", "src": "13788:2:20", "statements": [] }, "documentation": { "id": 4639, "nodeType": "StructuredDocumentation", "src": "13118:545:20", "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": 4649, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nameLocation": "13677:20:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4646, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4641, "mutability": "mutable", "name": "from", "nameLocation": "13715:4:20", "nodeType": "VariableDeclaration", "scope": 4649, "src": "13707:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4640, "name": "address", "nodeType": "ElementaryTypeName", "src": "13707:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4643, "mutability": "mutable", "name": "to", "nameLocation": "13737:2:20", "nodeType": "VariableDeclaration", "scope": 4649, "src": "13729:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4642, "name": "address", "nodeType": "ElementaryTypeName", "src": "13729:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4645, "mutability": "mutable", "name": "tokenId", "nameLocation": "13757:7:20", "nodeType": "VariableDeclaration", "scope": 4649, "src": "13749:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4644, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13749:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "13697:73:20" }, "returnParameters": { "id": 4647, "nodeType": "ParameterList", "parameters": [], "src": "13788:0:20" }, "scope": 4661, "src": "13668:122:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4659, "nodeType": "Block", "src": "14281:2:20", "statements": [] }, "documentation": { "id": 4650, "nodeType": "StructuredDocumentation", "src": "13796:361:20", "text": " @dev Hook that is called after any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero.\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": 4660, "implemented": true, "kind": "function", "modifiers": [], "name": "_afterTokenTransfer", "nameLocation": "14171:19:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4657, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4652, "mutability": "mutable", "name": "from", "nameLocation": "14208:4:20", "nodeType": "VariableDeclaration", "scope": 4660, "src": "14200:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4651, "name": "address", "nodeType": "ElementaryTypeName", "src": "14200:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4654, "mutability": "mutable", "name": "to", "nameLocation": "14230:2:20", "nodeType": "VariableDeclaration", "scope": 4660, "src": "14222:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4653, "name": "address", "nodeType": "ElementaryTypeName", "src": "14222:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4656, "mutability": "mutable", "name": "tokenId", "nameLocation": "14250:7:20", "nodeType": "VariableDeclaration", "scope": 4660, "src": "14242:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4655, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "14242:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "14190:73:20" }, "returnParameters": { "id": 4658, "nodeType": "ParameterList", "parameters": [], "src": "14281:0:20" }, "scope": 4661, "src": "14162:121:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "scope": 4662, "src": "628:13657:20", "usedErrors": [] } ], "src": "107:14179:20" }, "legacyAST": { "absolutePath": "@openzeppelin/contracts/token/ERC721/ERC721.sol", "exportedSymbols": { "Address": [ 5275 ], "Context": [ 5297 ], "ERC165": [ 6252 ], "ERC721": [ 4661 ], "IERC165": [ 6264 ], "IERC721": [ 4777 ], "IERC721Metadata": [ 4980 ], "IERC721Receiver": [ 4795 ], "Strings": [ 5574 ] }, "id": 4662, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 3797, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "107:23:20" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721.sol", "file": "./IERC721.sol", "id": 3798, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 4778, "src": "132:23:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol", "file": "./IERC721Receiver.sol", "id": 3799, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 4796, "src": "156:31:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol", "file": "./extensions/IERC721Metadata.sol", "id": 3800, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 4981, "src": "188:42:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Address.sol", "file": "../../utils/Address.sol", "id": 3801, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 5276, "src": "231:33:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Context.sol", "file": "../../utils/Context.sol", "id": 3802, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 5298, "src": "265:33:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Strings.sol", "file": "../../utils/Strings.sol", "id": 3803, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 5575, "src": "299:33:20", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/introspection/ERC165.sol", "file": "../../utils/introspection/ERC165.sol", "id": 3804, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 4662, "sourceUnit": 6253, "src": "333:46:20", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 3806, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 5297, "src": "647:7:20" }, "id": 3807, "nodeType": "InheritanceSpecifier", "src": "647:7:20" }, { "baseName": { "id": 3808, "name": "ERC165", "nodeType": "IdentifierPath", "referencedDeclaration": 6252, "src": "656:6:20" }, "id": 3809, "nodeType": "InheritanceSpecifier", "src": "656:6:20" }, { "baseName": { "id": 3810, "name": "IERC721", "nodeType": "IdentifierPath", "referencedDeclaration": 4777, "src": "664:7:20" }, "id": 3811, "nodeType": "InheritanceSpecifier", "src": "664:7:20" }, { "baseName": { "id": 3812, "name": "IERC721Metadata", "nodeType": "IdentifierPath", "referencedDeclaration": 4980, "src": "673:15:20" }, "id": 3813, "nodeType": "InheritanceSpecifier", "src": "673:15:20" } ], "canonicalName": "ERC721", "contractDependencies": [], "contractKind": "contract", "documentation": { "id": 3805, "nodeType": "StructuredDocumentation", "src": "381:246:20", "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": 4661, "linearizedBaseContracts": [ 4661, 4980, 4777, 6252, 6264, 5297 ], "name": "ERC721", "nameLocation": "637:6:20", "nodeType": "ContractDefinition", "nodes": [ { "id": 3816, "libraryName": { "id": 3814, "name": "Address", "nodeType": "IdentifierPath", "referencedDeclaration": 5275, "src": "701:7:20" }, "nodeType": "UsingForDirective", "src": "695:26:20", "typeName": { "id": 3815, "name": "address", "nodeType": "ElementaryTypeName", "src": "713:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, { "id": 3819, "libraryName": { "id": 3817, "name": "Strings", "nodeType": "IdentifierPath", "referencedDeclaration": 5574, "src": "732:7:20" }, "nodeType": "UsingForDirective", "src": "726:26:20", "typeName": { "id": 3818, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "744:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "constant": false, "id": 3821, "mutability": "mutable", "name": "_name", "nameLocation": "791:5:20", "nodeType": "VariableDeclaration", "scope": 4661, "src": "776:20:20", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 3820, "name": "string", "nodeType": "ElementaryTypeName", "src": "776:6:20", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 3823, "mutability": "mutable", "name": "_symbol", "nameLocation": "838:7:20", "nodeType": "VariableDeclaration", "scope": 4661, "src": "823:22:20", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": 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"mutability": "mutable", "name": "_data", "nameLocation": "5482:5:20", "nodeType": "VariableDeclaration", "scope": 4187, "src": "5469:18:20", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4165, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "5469:5:20", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "5392:101:20" }, "returnParameters": { "id": 4169, "nodeType": "ParameterList", "parameters": [], "src": "5518:0:20" }, "scope": 4661, "src": "5367:320:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 4215, "nodeType": "Block", "src": "6690:166:20", "statements": [ { "expression": { "arguments": [ { "id": 4200, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4190, "src": "6710:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4201, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4192, "src": "6716:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4202, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4194, "src": "6720:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4199, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4520, "src": "6700:9:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4203, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6700:28:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4204, "nodeType": "ExpressionStatement", "src": "6700:28:20" }, { "expression": { "arguments": [ { "arguments": [ { "id": 4207, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4190, "src": "6769:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4208, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4192, "src": "6775:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4209, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4194, "src": "6779:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 4210, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4196, "src": "6788:5:20", "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": 4206, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4638, "src": "6746:22:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 4211, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6746:48:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 4212, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6796:52:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" }, "value": "ERC721: transfer to non ERC721Receiver implementer" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" } ], "id": 4205, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "6738:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4213, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6738:111:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4214, "nodeType": "ExpressionStatement", "src": "6738:111:20" } ] }, "documentation": { "id": 4188, "nodeType": "StructuredDocumentation", "src": "5693:851:20", "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": 4216, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeTransfer", "nameLocation": "6558:13:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4197, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4190, "mutability": "mutable", "name": "from", "nameLocation": "6589:4:20", "nodeType": "VariableDeclaration", "scope": 4216, "src": "6581:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4189, "name": "address", "nodeType": "ElementaryTypeName", "src": "6581:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4192, "mutability": "mutable", "name": "to", "nameLocation": "6611:2:20", "nodeType": "VariableDeclaration", "scope": 4216, "src": "6603:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4191, "name": "address", "nodeType": "ElementaryTypeName", "src": "6603:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4194, "mutability": "mutable", "name": "tokenId", "nameLocation": "6631:7:20", "nodeType": "VariableDeclaration", "scope": 4216, "src": "6623:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4193, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6623:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 4196, "mutability": "mutable", "name": "_data", "nameLocation": "6661:5:20", "nodeType": "VariableDeclaration", "scope": 4216, "src": "6648:18:20", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4195, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "6648:5:20", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "6571:101:20" }, "returnParameters": { "id": 4198, "nodeType": "ParameterList", "parameters": [], "src": "6690:0:20" }, "scope": 4661, "src": "6549:307:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4233, "nodeType": "Block", "src": "7230:54:20", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4231, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "baseExpression": { "id": 4224, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3827, "src": "7247:7:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4226, "indexExpression": { "id": 4225, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4219, "src": "7255:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7247:16:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 4229, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7275:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 4228, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7267:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4227, "name": "address", "nodeType": "ElementaryTypeName", "src": "7267:7:20", "typeDescriptions": {} } }, "id": 4230, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7267:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7247:30:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 4223, "id": 4232, "nodeType": "Return", "src": "7240:37:20" } ] }, "documentation": { "id": 4217, "nodeType": "StructuredDocumentation", "src": "6862:292:20", "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": 4234, "implemented": true, "kind": "function", "modifiers": [], "name": "_exists", "nameLocation": "7168:7:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4220, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4219, "mutability": "mutable", "name": "tokenId", "nameLocation": "7184:7:20", "nodeType": "VariableDeclaration", "scope": 4234, "src": "7176:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4218, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7176:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7175:17:20" }, "returnParameters": { "id": 4223, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4222, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 4234, "src": "7224:4:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 4221, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7224:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7223:6:20" }, "scope": 4661, "src": "7159:125:20", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 4274, "nodeType": "Block", "src": "7541:245:20", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "id": 4246, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4239, "src": "7567:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4245, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4234, "src": "7559:7:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 4247, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7559:16:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a206f70657261746f7220717565727920666f72206e6f6e6578697374656e7420746f6b656e", "id": 4248, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7577:46:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c", "typeString": "literal_string \"ERC721: operator query for nonexistent token\"" }, "value": "ERC721: operator query for nonexistent token" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_5797d1ccb08b83980dd0c07ea40d8f6a64d35fff736a19bdd17522954cb0899c", "typeString": "literal_string \"ERC721: operator query for nonexistent token\"" } ], "id": 4244, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "7551:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4249, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7551:73:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4250, "nodeType": "ExpressionStatement", "src": "7551:73:20" }, { "assignments": [ 4252 ], "declarations": [ { "constant": false, "id": 4252, "mutability": "mutable", "name": "owner", "nameLocation": "7642:5:20", "nodeType": "VariableDeclaration", "scope": 4274, "src": "7634:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4251, "name": "address", "nodeType": "ElementaryTypeName", "src": "7634:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 4257, "initialValue": { "arguments": [ { "id": 4255, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4239, "src": "7665:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 4253, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4661, "src": "7650:6:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$4661_$", "typeString": "type(contract ERC721)" } }, "id": 4254, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 3941, "src": "7650:14:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4256, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7650:23:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7634:39:20" }, { "expression": { "components": [ { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 4271, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 4266, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4260, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4258, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4237, "src": "7691:7:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 4259, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4252, "src": "7702:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7691:16:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4265, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 4262, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4239, "src": "7723:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4261, "name": "getApproved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4076, "src": "7711:11:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4263, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7711:20:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 4264, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4237, "src": "7735:7:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7711:31:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7691:51:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "arguments": [ { "id": 4268, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4252, "src": "7763:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4269, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4237, "src": "7770:7:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 4267, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4111, "src": "7746:16:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)" } }, "id": 4270, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7746:32:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "7691:87:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 4272, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "7690:89:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 4243, "id": 4273, "nodeType": "Return", "src": "7683:96:20" } ] }, "documentation": { "id": 4235, "nodeType": "StructuredDocumentation", "src": "7290:147:20", "text": " @dev Returns whether `spender` is allowed to manage `tokenId`.\n Requirements:\n - `tokenId` must exist." }, "id": 4275, "implemented": true, "kind": "function", "modifiers": [], "name": "_isApprovedOrOwner", "nameLocation": "7451:18:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4240, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4237, "mutability": "mutable", "name": "spender", "nameLocation": "7478:7:20", "nodeType": "VariableDeclaration", "scope": 4275, "src": "7470:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4236, "name": "address", "nodeType": "ElementaryTypeName", "src": "7470:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4239, "mutability": "mutable", "name": "tokenId", "nameLocation": "7495:7:20", "nodeType": "VariableDeclaration", "scope": 4275, "src": "7487:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4238, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7487:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7469:34:20" }, "returnParameters": { "id": 4243, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4242, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 4275, "src": "7535:4:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 4241, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7535:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7534:6:20" }, "scope": 4661, "src": "7442:344:20", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 4289, "nodeType": "Block", "src": "8181:43:20", "statements": [ { "expression": { "arguments": [ { "id": 4284, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4278, "src": "8201:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4285, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4280, "src": "8205:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "", "id": 4286, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8214:2:20", "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": 4283, "name": "_safeMint", "nodeType": "Identifier", "overloadedDeclarations": [ 4290, 4319 ], "referencedDeclaration": 4319, "src": "8191:9:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,uint256,bytes memory)" } }, "id": 4287, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8191:26:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4288, "nodeType": "ExpressionStatement", "src": "8191:26:20" } ] }, "documentation": { "id": 4276, "nodeType": "StructuredDocumentation", "src": "7792:319:20", "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": 4290, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nameLocation": "8125:9:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4281, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4278, "mutability": "mutable", "name": "to", "nameLocation": "8143:2:20", "nodeType": "VariableDeclaration", "scope": 4290, "src": "8135:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4277, "name": "address", "nodeType": "ElementaryTypeName", "src": "8135:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4280, "mutability": "mutable", "name": "tokenId", "nameLocation": "8155:7:20", "nodeType": "VariableDeclaration", "scope": 4290, "src": "8147:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4279, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8147:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8134:29:20" }, "returnParameters": { "id": 4282, "nodeType": "ParameterList", "parameters": [], "src": "8181:0:20" }, "scope": 4661, "src": "8116:108:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4318, "nodeType": "Block", "src": "8560:196:20", "statements": [ { "expression": { "arguments": [ { "id": 4301, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4293, "src": "8576:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4302, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4295, "src": "8580:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4300, "name": "_mint", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4385, "src": "8570:5:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 4303, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8570:18:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4304, "nodeType": "ExpressionStatement", "src": "8570:18:20" }, { "expression": { "arguments": [ { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4309, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8650:1:20", "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": 4308, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8642:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4307, "name": "address", "nodeType": "ElementaryTypeName", "src": "8642:7:20", "typeDescriptions": {} } }, "id": 4310, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8642:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4311, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4293, "src": "8654:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4312, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4295, "src": "8658:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 4313, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4297, "src": "8667:5:20", "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": 4306, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4638, "src": "8619:22:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,address,uint256,bytes memory) returns (bool)" } }, "id": 4314, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8619:54:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 4315, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8687:52:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" }, "value": "ERC721: transfer to non ERC721Receiver implementer" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_1e766a06da43a53d0f4c380e06e5a342e14d5af1bf8501996c844905530ca84e", "typeString": "literal_string \"ERC721: transfer to non ERC721Receiver implementer\"" } ], "id": 4305, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "8598:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4316, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8598:151:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4317, "nodeType": "ExpressionStatement", "src": "8598:151:20" } ] }, "documentation": { "id": 4291, "nodeType": "StructuredDocumentation", "src": "8230:210:20", "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": 4319, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nameLocation": "8454:9:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4298, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4293, "mutability": "mutable", "name": "to", "nameLocation": "8481:2:20", "nodeType": "VariableDeclaration", "scope": 4319, "src": "8473:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4292, "name": "address", "nodeType": "ElementaryTypeName", "src": "8473:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4295, "mutability": "mutable", "name": "tokenId", "nameLocation": "8501:7:20", "nodeType": "VariableDeclaration", "scope": 4319, "src": "8493:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4294, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8493:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 4297, "mutability": "mutable", "name": "_data", "nameLocation": "8531:5:20", "nodeType": "VariableDeclaration", "scope": 4319, "src": "8518:18:20", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4296, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "8518:5:20", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "8463:79:20" }, "returnParameters": { "id": 4299, "nodeType": "ParameterList", "parameters": [], "src": "8560:0:20" }, "scope": 4661, "src": "8445:311:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4384, "nodeType": "Block", "src": "9139:366:20", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4333, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4328, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9157:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 4331, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9171:1:20", "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": 4330, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9163:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4329, "name": "address", "nodeType": "ElementaryTypeName", "src": "9163:7:20", "typeDescriptions": {} } }, "id": 4332, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9163:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9157:16:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a206d696e7420746f20746865207a65726f2061646472657373", "id": 4334, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9175:34:20", "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": 4327, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9149:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4335, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9149:61:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4336, "nodeType": "ExpressionStatement", "src": "9149:61:20" }, { "expression": { "arguments": [ { "id": 4341, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "9228:17:20", "subExpression": { "arguments": [ { "id": 4339, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9237:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4338, "name": "_exists", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4234, "src": "9229:7:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_bool_$", "typeString": "function (uint256) view returns (bool)" } }, "id": 4340, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9229:16:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a20746f6b656e20616c7265616479206d696e746564", "id": 4342, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9247:30:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" }, "value": "ERC721: token already minted" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_2a63ce106ef95058ed21fd07c42a10f11dc5c32ac13a4e847923f7759f635d57", "typeString": "literal_string \"ERC721: token already minted\"" } ], "id": 4337, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9220:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4343, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9220:58:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4344, "nodeType": "ExpressionStatement", "src": "9220:58:20" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4348, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9318:1:20", "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": 4347, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9310:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4346, "name": "address", "nodeType": "ElementaryTypeName", "src": "9310:7:20", "typeDescriptions": {} } }, "id": 4349, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9310:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4350, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9322:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4351, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9326:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4345, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4649, "src": "9289:20:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4352, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9289:45:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4353, "nodeType": "ExpressionStatement", "src": "9289:45:20" }, { "expression": { "id": 4358, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4354, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3831, "src": "9345:9:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4356, "indexExpression": { "id": 4355, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9355:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9345:13:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "hexValue": "31", "id": 4357, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9362:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "9345:18:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4359, "nodeType": "ExpressionStatement", "src": "9345:18:20" }, { "expression": { "id": 4364, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4360, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3827, "src": "9373:7:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4362, "indexExpression": { "id": 4361, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9381:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9373:16:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 4363, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9392:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9373:21:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 4365, "nodeType": "ExpressionStatement", "src": "9373:21:20" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4369, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9427:1:20", "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": 4368, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9419:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4367, "name": "address", "nodeType": "ElementaryTypeName", "src": "9419:7:20", "typeDescriptions": {} } }, "id": 4370, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9419:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4371, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9431:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4372, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9435:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4366, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4676, "src": "9410:8:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4373, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9410:33:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4374, "nodeType": "EmitStatement", "src": "9405:38:20" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4378, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9482:1:20", "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": 4377, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9474:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4376, "name": "address", "nodeType": "ElementaryTypeName", "src": "9474:7:20", "typeDescriptions": {} } }, "id": 4379, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9474:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4380, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4322, "src": "9486:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4381, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4324, "src": "9490:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4375, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4660, "src": "9454:19:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4382, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9454:44:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4383, "nodeType": "ExpressionStatement", "src": "9454:44:20" } ] }, "documentation": { "id": 4320, "nodeType": "StructuredDocumentation", "src": "8762:311:20", "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": 4385, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nameLocation": "9087:5:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4325, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4322, "mutability": "mutable", "name": "to", "nameLocation": "9101:2:20", "nodeType": "VariableDeclaration", "scope": 4385, "src": "9093:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4321, "name": "address", "nodeType": "ElementaryTypeName", "src": "9093:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4324, "mutability": "mutable", "name": "tokenId", "nameLocation": "9113:7:20", "nodeType": "VariableDeclaration", "scope": 4385, "src": "9105:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4323, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9105:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9092:29:20" }, "returnParameters": { "id": 4326, "nodeType": "ParameterList", "parameters": [], "src": "9139:0:20" }, "scope": 4661, "src": "9078:427:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4444, "nodeType": "Block", "src": "9771:357:20", "statements": [ { "assignments": [ 4392 ], "declarations": [ { "constant": false, "id": 4392, "mutability": "mutable", "name": "owner", "nameLocation": "9789:5:20", "nodeType": "VariableDeclaration", "scope": 4444, "src": "9781:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4391, "name": "address", "nodeType": "ElementaryTypeName", "src": "9781:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 4397, "initialValue": { "arguments": [ { "id": 4395, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "9812:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 4393, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4661, "src": "9797:6:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$4661_$", "typeString": "type(contract ERC721)" } }, "id": 4394, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 3941, "src": "9797:14:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4396, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9797:23:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "9781:39:20" }, { "expression": { "arguments": [ { "id": 4399, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4392, "src": "9852:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 4402, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9867:1:20", "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": 4401, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9859:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4400, "name": "address", "nodeType": "ElementaryTypeName", "src": "9859:7:20", "typeDescriptions": {} } }, "id": 4403, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9859:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4404, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "9871:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4398, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4649, "src": "9831:20:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4405, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9831:48:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4406, "nodeType": "ExpressionStatement", "src": "9831:48:20" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4410, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9934:1:20", "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": 4409, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9926:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4408, "name": "address", "nodeType": "ElementaryTypeName", "src": "9926:7:20", "typeDescriptions": {} } }, "id": 4411, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9926:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4412, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "9938:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4407, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4544, "src": "9917:8:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 4413, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9917:29:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4414, "nodeType": "ExpressionStatement", "src": "9917:29:20" }, { "expression": { "id": 4419, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4415, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3831, "src": "9957:9:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4417, "indexExpression": { "id": 4416, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4392, "src": "9967:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9957:16:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "hexValue": "31", "id": 4418, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9977:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "9957:21:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4420, "nodeType": "ExpressionStatement", "src": "9957:21:20" }, { "expression": { "id": 4424, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "delete", "prefix": true, "src": "9988:23:20", "subExpression": { "baseExpression": { "id": 4421, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3827, "src": "9995:7:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4423, "indexExpression": { "id": 4422, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "10003:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9995:16:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4425, "nodeType": "ExpressionStatement", "src": "9988:23:20" }, { "eventCall": { "arguments": [ { "id": 4427, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4392, "src": "10036:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 4430, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10051:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 4429, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10043:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4428, "name": "address", "nodeType": "ElementaryTypeName", "src": "10043:7:20", "typeDescriptions": {} } }, "id": 4431, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10043:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4432, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "10055:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4426, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4676, "src": "10027:8:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4433, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10027:36:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4434, "nodeType": "EmitStatement", "src": "10022:41:20" }, { "expression": { "arguments": [ { "id": 4436, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4392, "src": "10094:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 4439, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10109:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 4438, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10101:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4437, "name": "address", "nodeType": "ElementaryTypeName", "src": "10101:7:20", "typeDescriptions": {} } }, "id": 4440, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10101:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4441, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4388, "src": "10113:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4435, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4660, "src": "10074:19:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4442, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10074:47:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4443, "nodeType": "ExpressionStatement", "src": "10074:47:20" } ] }, "documentation": { "id": 4386, "nodeType": "StructuredDocumentation", "src": "9511:206:20", "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": 4445, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nameLocation": "9731:5:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4389, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4388, "mutability": "mutable", "name": "tokenId", "nameLocation": "9745:7:20", "nodeType": "VariableDeclaration", "scope": 4445, "src": "9737:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4387, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9737:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9736:17:20" }, "returnParameters": { "id": 4390, "nodeType": "ParameterList", "parameters": [], "src": "9771:0:20" }, "scope": 4661, "src": "9722:406:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4519, "nodeType": "Block", "src": "10561:496:20", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4461, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 4458, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10594:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 4456, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4661, "src": "10579:6:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$4661_$", "typeString": "type(contract ERC721)" } }, "id": 4457, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 3941, "src": "10579:14:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4459, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10579:23:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 4460, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "10606:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10579:31:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e736665722066726f6d20696e636f7272656374206f776e6572", "id": 4462, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10612:39:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48", "typeString": "literal_string \"ERC721: transfer from incorrect owner\"" }, "value": "ERC721: transfer from incorrect owner" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_277f8ee9d5b4fc3c4149386f24de0fc1bbc63a8210e2197bfd1c0376a2ac5f48", "typeString": "literal_string \"ERC721: transfer from incorrect owner\"" } ], "id": 4455, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10571:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4463, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10571:81:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4464, "nodeType": "ExpressionStatement", "src": "10571:81:20" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4471, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4466, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10670:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 4469, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10684:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 4468, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10676:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4467, "name": "address", "nodeType": "ElementaryTypeName", "src": "10676:7:20", "typeDescriptions": {} } }, "id": 4470, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10676:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10670:16:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 4472, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10688:38:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" }, "value": "ERC721: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_455fea98ea03c32d7dd1a6f1426917d80529bf47b3ccbde74e7206e889e709f4", "typeString": "literal_string \"ERC721: transfer to the zero address\"" } ], "id": 4465, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10662:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4473, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10662:65:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4474, "nodeType": "ExpressionStatement", "src": "10662:65:20" }, { "expression": { "arguments": [ { "id": 4476, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "10759:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4477, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10765:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4478, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10769:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4475, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4649, "src": "10738:20:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4479, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10738:39:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4480, "nodeType": "ExpressionStatement", "src": "10738:39:20" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 4484, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10856:1:20", "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": 4483, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10848:7:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 4482, "name": "address", "nodeType": "ElementaryTypeName", "src": "10848:7:20", "typeDescriptions": {} } }, "id": 4485, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10848:10:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4486, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10860:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4481, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4544, "src": "10839:8:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 4487, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10839:29:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4488, "nodeType": "ExpressionStatement", "src": "10839:29:20" }, { "expression": { "id": 4493, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4489, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3831, "src": "10879:9:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4491, "indexExpression": { "id": 4490, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "10889:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10879:15:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "hexValue": "31", "id": 4492, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10898:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "10879:20:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4494, "nodeType": "ExpressionStatement", "src": "10879:20:20" }, { "expression": { "id": 4499, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4495, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3831, "src": "10909:9:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4497, "indexExpression": { "id": 4496, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10919:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10909:13:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "hexValue": "31", "id": 4498, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10926:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "10909:18:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4500, "nodeType": "ExpressionStatement", "src": "10909:18:20" }, { "expression": { "id": 4505, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4501, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3827, "src": "10937:7:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4503, "indexExpression": { "id": 4502, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10945:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10937:16:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 4504, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10956:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10937:21:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 4506, "nodeType": "ExpressionStatement", "src": "10937:21:20" }, { "eventCall": { "arguments": [ { "id": 4508, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "10983:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4509, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "10989:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4510, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "10993:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4507, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4676, "src": "10974:8:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4511, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10974:27:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4512, "nodeType": "EmitStatement", "src": "10969:32:20" }, { "expression": { "arguments": [ { "id": 4514, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4448, "src": "11032:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4515, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4450, "src": "11038:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4516, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4452, "src": "11042:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4513, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4660, "src": "11012:19:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4517, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11012:38:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4518, "nodeType": "ExpressionStatement", "src": "11012:38:20" } ] }, "documentation": { "id": 4446, "nodeType": "StructuredDocumentation", "src": "10134:313:20", "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": 4520, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nameLocation": "10461:9:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4453, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4448, "mutability": "mutable", "name": "from", "nameLocation": "10488:4:20", "nodeType": "VariableDeclaration", "scope": 4520, "src": "10480:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4447, "name": "address", "nodeType": "ElementaryTypeName", "src": "10480:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4450, "mutability": "mutable", "name": "to", "nameLocation": "10510:2:20", "nodeType": "VariableDeclaration", "scope": 4520, "src": "10502:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4449, "name": "address", "nodeType": "ElementaryTypeName", "src": "10502:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4452, "mutability": "mutable", "name": "tokenId", "nameLocation": "10530:7:20", "nodeType": "VariableDeclaration", "scope": 4520, "src": "10522:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4451, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10522:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10470:73:20" }, "returnParameters": { "id": 4454, "nodeType": "ParameterList", "parameters": [], "src": "10561:0:20" }, "scope": 4661, "src": "10452:605:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4543, "nodeType": "Block", "src": "11232:107:20", "statements": [ { "expression": { "id": 4532, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 4528, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3835, "src": "11242:15:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)" } }, "id": 4530, "indexExpression": { "id": 4529, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4525, "src": "11258:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11242:24:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 4531, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4523, "src": "11269:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11242:29:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 4533, "nodeType": "ExpressionStatement", "src": "11242:29:20" }, { "eventCall": { "arguments": [ { "arguments": [ { "id": 4537, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4525, "src": "11310:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 4535, "name": "ERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4661, "src": "11295:6:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ERC721_$4661_$", "typeString": "type(contract ERC721)" } }, "id": 4536, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "ownerOf", "nodeType": "MemberAccess", "referencedDeclaration": 3941, "src": "11295:14:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)" } }, "id": 4538, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11295:23:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4539, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4523, "src": "11320:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4540, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4525, "src": "11324:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4534, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4685, "src": "11286:8:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 4541, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11286:46:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4542, "nodeType": "EmitStatement", "src": "11281:51:20" } ] }, "documentation": { "id": 4521, "nodeType": "StructuredDocumentation", "src": "11063:100:20", "text": " @dev Approve `to` to operate on `tokenId`\n Emits a {Approval} event." }, "id": 4544, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nameLocation": "11177:8:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4526, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4523, "mutability": "mutable", "name": "to", "nameLocation": "11194:2:20", "nodeType": "VariableDeclaration", "scope": 4544, "src": "11186:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4522, "name": "address", "nodeType": "ElementaryTypeName", "src": "11186:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4525, "mutability": "mutable", "name": "tokenId", "nameLocation": "11206:7:20", "nodeType": "VariableDeclaration", "scope": 4544, "src": "11198:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4524, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11198:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11185:29:20" }, "returnParameters": { "id": 4527, "nodeType": "ParameterList", "parameters": [], "src": "11232:0:20" }, "scope": 4661, "src": "11168:171:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4575, "nodeType": "Block", "src": "11597:184:20", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 4557, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4555, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4547, "src": "11615:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "id": 4556, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4549, "src": "11624:8:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11615:17:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "4552433732313a20617070726f766520746f2063616c6c6572", "id": 4558, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11634:27:20", "typeDescriptions": { "typeIdentifier": "t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05", "typeString": "literal_string \"ERC721: approve to caller\"" }, "value": "ERC721: approve to caller" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_45fe4329685be5ecd250fd0e6a25aea0ea4d0e30fb6a73c118b95749e6d70d05", "typeString": "literal_string \"ERC721: approve to caller\"" } ], "id": 4554, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "11607:7:20", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 4559, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11607:55:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4560, "nodeType": "ExpressionStatement", "src": "11607:55:20" }, { "expression": { "id": 4567, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 4561, "name": "_operatorApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3841, "src": "11672:18:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))" } }, "id": 4564, "indexExpression": { "id": 4562, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4547, "src": "11691:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "11672:25:20", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 4565, "indexExpression": { "id": 4563, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4549, "src": "11698:8:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11672:35:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 4566, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4551, "src": "11710:8:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "11672:46:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 4568, "nodeType": "ExpressionStatement", "src": "11672:46:20" }, { "eventCall": { "arguments": [ { "id": 4570, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4547, "src": "11748:5:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4571, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4549, "src": "11755:8:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4572, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4551, "src": "11765:8:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 4569, "name": "ApprovalForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4694, "src": "11733:14:20", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_bool_$returns$__$", "typeString": "function (address,address,bool)" } }, "id": 4573, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11733:41:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4574, "nodeType": "EmitStatement", "src": "11728:46:20" } ] }, "documentation": { "id": 4545, "nodeType": "StructuredDocumentation", "src": "11345:124:20", "text": " @dev Approve `operator` to operate on all of `owner` tokens\n Emits a {ApprovalForAll} event." }, "id": 4576, "implemented": true, "kind": "function", "modifiers": [], "name": "_setApprovalForAll", "nameLocation": "11483:18:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4552, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4547, "mutability": "mutable", "name": "owner", "nameLocation": "11519:5:20", "nodeType": "VariableDeclaration", "scope": 4576, "src": "11511:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4546, "name": "address", "nodeType": "ElementaryTypeName", "src": "11511:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4549, "mutability": "mutable", "name": "operator", "nameLocation": "11542:8:20", "nodeType": "VariableDeclaration", "scope": 4576, "src": "11534:16:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4548, "name": "address", "nodeType": "ElementaryTypeName", "src": "11534:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4551, "mutability": "mutable", "name": "approved", "nameLocation": "11565:8:20", "nodeType": "VariableDeclaration", "scope": 4576, "src": "11560:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 4550, "name": "bool", "nodeType": "ElementaryTypeName", "src": "11560:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "11501:78:20" }, "returnParameters": { "id": 4553, "nodeType": "ParameterList", "parameters": [], "src": "11597:0:20" }, "scope": 4661, "src": "11474:307:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4637, "nodeType": "Block", "src": "12490:622:20", "statements": [ { "condition": { "arguments": [], "expression": { "argumentTypes": [], "expression": { "id": 4590, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4581, "src": "12504:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 4591, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "isContract", "nodeType": "MemberAccess", "referencedDeclaration": 4998, "src": "12504:13:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$returns$_t_bool_$bound_to$_t_address_$", "typeString": "function (address) view returns (bool)" } }, "id": 4592, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12504:15:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 4635, "nodeType": "Block", "src": "13070:36:20", "statements": [ { "expression": { "hexValue": "74727565", "id": 4633, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "13091:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 4589, "id": 4634, "nodeType": "Return", "src": "13084:11:20" } ] }, "id": 4636, "nodeType": "IfStatement", "src": "12500:606:20", "trueBody": { "id": 4632, "nodeType": "Block", "src": "12521:543:20", "statements": [ { "clauses": [ { "block": { "id": 4612, "nodeType": "Block", "src": "12636:91:20", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "id": 4610, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 4606, "name": "retval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4604, "src": "12661:6:20", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "expression": { "expression": { "id": 4607, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4795, "src": "12671:15:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$4795_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 4608, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 4794, "src": "12671:32:20", "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": 4609, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "12671:41:20", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "src": "12661:51:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 4589, "id": 4611, "nodeType": "Return", "src": "12654:58:20" } ] }, "errorName": "", "id": 4613, "nodeType": "TryCatchClause", "parameters": { "id": 4605, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4604, "mutability": "mutable", "name": "retval", "nameLocation": "12628:6:20", "nodeType": "VariableDeclaration", "scope": 4613, "src": "12621:13:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 4603, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "12621:6:20", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "visibility": "internal" } ], "src": "12620:15:20" }, "src": "12612:115:20" }, { "block": { "id": 4629, "nodeType": "Block", "src": "12756:298:20", "statements": [ { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 4620, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "expression": { "id": 4617, "name": "reason", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4615, "src": "12778:6:20", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 4618, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "src": "12778:13:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 4619, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12795:1:20", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "12778:18:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 4627, "nodeType": "Block", "src": "12905:135:20", "statements": [ { "AST": { "nodeType": "YulBlock", "src": "12936:86:20", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "kind": "number", "nodeType": "YulLiteral", "src": "12973:2:20", "type": "", "value": "32" }, { "name": "reason", "nodeType": "YulIdentifier", "src": "12977:6:20" } ], "functionName": { "name": "add", "nodeType": "YulIdentifier", "src": "12969:3:20" }, "nodeType": "YulFunctionCall", "src": "12969:15:20" }, { "arguments": [ { "name": "reason", "nodeType": "YulIdentifier", "src": "12992:6:20" } ], "functionName": { "name": "mload", "nodeType": "YulIdentifier", "src": "12986:5:20" }, "nodeType": "YulFunctionCall", "src": "12986:13:20" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "12962:6:20" }, "nodeType": "YulFunctionCall", "src": "12962:38:20" }, "nodeType": "YulExpressionStatement", "src": "12962:38:20" } ] }, "evmVersion": "london", "externalReferences": [ { "declaration": 4615, "isOffset": false, "isSlot": false, "src": "12977:6:20", "valueSize": 1 }, { "declaration": 4615, "isOffset": false, "isSlot": false, "src": "12992:6:20", "valueSize": 1 } ], "id": 4626, "nodeType": "InlineAssembly", "src": "12927:95:20" } ] }, "id": 4628, "nodeType": "IfStatement", "src": "12774:266:20", "trueBody": { "id": 4625, "nodeType": "Block", "src": "12798:101:20", "statements": [ { "expression": { "arguments": [ { "hexValue": "4552433732313a207472616e7366657220746f206e6f6e20455243373231526563656976657220696d706c656d656e746572", "id": 4622, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "12827:52:20", "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": 4621, "name": "revert", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967277, 4294967277 ], "referencedDeclaration": 4294967277, "src": "12820:6:20", "typeDescriptions": { "typeIdentifier": "t_function_revert_pure$_t_string_memory_ptr_$returns$__$", "typeString": "function (string memory) pure" } }, "id": 4623, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12820:60:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4624, "nodeType": "ExpressionStatement", "src": "12820:60:20" } ] } } ] }, "errorName": "", "id": 4630, "nodeType": "TryCatchClause", "parameters": { "id": 4616, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4615, "mutability": "mutable", "name": "reason", "nameLocation": "12748:6:20", "nodeType": "VariableDeclaration", "scope": 4630, "src": "12735:19:20", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4614, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "12735:5:20", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "12734:21:20" }, "src": "12728:326:20" } ], "externalCall": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 4597, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "12576:10:20", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 4598, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12576:12:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4599, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4579, "src": "12590:4:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 4600, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4583, "src": "12596:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 4601, "name": "_data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4585, "src": "12605:5:20", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "arguments": [ { "id": 4594, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4581, "src": "12555:2:20", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 4593, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4795, "src": "12539:15:20", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$4795_$", "typeString": "type(contract IERC721Receiver)" } }, "id": 4595, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12539:19:20", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_contract$_IERC721Receiver_$4795", "typeString": "contract IERC721Receiver" } }, "id": 4596, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 4794, "src": "12539:36:20", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bytes4_$", "typeString": "function (address,address,uint256,bytes memory) external returns (bytes4)" } }, "id": 4602, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12539:72:20", "tryCall": true, "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "id": 4631, "nodeType": "TryStatement", "src": "12535:519:20" } ] } } ] }, "documentation": { "id": 4577, "nodeType": "StructuredDocumentation", "src": "11787:542:20", "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": 4638, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkOnERC721Received", "nameLocation": "12343:22:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4586, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4579, "mutability": "mutable", "name": "from", "nameLocation": "12383:4:20", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12375:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4578, "name": "address", "nodeType": "ElementaryTypeName", "src": "12375:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4581, "mutability": "mutable", "name": "to", "nameLocation": "12405:2:20", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12397:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4580, "name": "address", "nodeType": "ElementaryTypeName", "src": "12397:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4583, "mutability": "mutable", "name": "tokenId", "nameLocation": "12425:7:20", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12417:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4582, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12417:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 4585, "mutability": "mutable", "name": "_data", "nameLocation": "12455:5:20", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12442:18:20", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 4584, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "12442:5:20", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "12365:101:20" }, "returnParameters": { "id": 4589, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4588, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 4638, "src": "12484:4:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 4587, "name": "bool", "nodeType": "ElementaryTypeName", "src": "12484:4:20", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "12483:6:20" }, "scope": 4661, "src": "12334:778:20", "stateMutability": "nonpayable", "virtual": false, "visibility": "private" }, { "body": { "id": 4648, "nodeType": "Block", "src": "13788:2:20", "statements": [] }, "documentation": { "id": 4639, "nodeType": "StructuredDocumentation", "src": "13118:545:20", "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": 4649, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nameLocation": "13677:20:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4646, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4641, "mutability": "mutable", "name": "from", "nameLocation": "13715:4:20", "nodeType": "VariableDeclaration", "scope": 4649, "src": "13707:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4640, "name": "address", "nodeType": "ElementaryTypeName", "src": "13707:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4643, "mutability": "mutable", "name": "to", "nameLocation": "13737:2:20", "nodeType": "VariableDeclaration", "scope": 4649, "src": "13729:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4642, "name": "address", "nodeType": "ElementaryTypeName", "src": "13729:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4645, "mutability": "mutable", "name": "tokenId", "nameLocation": "13757:7:20", "nodeType": "VariableDeclaration", "scope": 4649, "src": "13749:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4644, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13749:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "13697:73:20" }, "returnParameters": { "id": 4647, "nodeType": "ParameterList", "parameters": [], "src": "13788:0:20" }, "scope": 4661, "src": "13668:122:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 4659, "nodeType": "Block", "src": "14281:2:20", "statements": [] }, "documentation": { "id": 4650, "nodeType": "StructuredDocumentation", "src": "13796:361:20", "text": " @dev Hook that is called after any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero.\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": 4660, "implemented": true, "kind": "function", "modifiers": [], "name": "_afterTokenTransfer", "nameLocation": "14171:19:20", "nodeType": "FunctionDefinition", "parameters": { "id": 4657, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4652, "mutability": "mutable", "name": "from", "nameLocation": "14208:4:20", "nodeType": "VariableDeclaration", "scope": 4660, "src": "14200:12:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4651, "name": "address", "nodeType": "ElementaryTypeName", "src": "14200:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4654, "mutability": "mutable", "name": "to", "nameLocation": "14230:2:20", "nodeType": "VariableDeclaration", "scope": 4660, "src": "14222:10:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4653, "name": "address", "nodeType": "ElementaryTypeName", "src": "14222:7:20", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 4656, "mutability": "mutable", "name": "tokenId", "nameLocation": "14250:7:20", "nodeType": "VariableDeclaration", "scope": 4660, "src": "14242:15:20", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4655, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "14242:7:20", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "14190:73:20" }, "returnParameters": { "id": 4658, "nodeType": "ParameterList", "parameters": [], "src": "14281:0:20" }, "scope": 4661, "src": "14162:121:20", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "scope": 4662, "src": "628:13657:20", "usedErrors": [] } ], "src": "107:14179:20" }, "compiler": { "name": "solc", "version": "0.8.11+commit.d7f03943.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.4.4", "updatedAt": "2022-03-06T23:47:11.038Z", "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 } }