{ "fileName": "ERC721Pausable.sol", "contractName": "ERC721Pausable", "source": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\nimport \"./ERC721.sol\";\nimport \"../../utils/Pausable.sol\";\n\n/**\n * @dev ERC721 token with pausable token transfers, minting and burning.\n *\n * Useful for scenarios such as preventing trades until the end of an evaluation\n * period, or having an emergency switch for freezing all token transfers in the\n * event of a large bug.\n */\nabstract contract ERC721Pausable is ERC721, Pausable {\n /**\n * @dev See {ERC721-_beforeTokenTransfer}.\n *\n * Requirements:\n *\n * - the contract must not be paused.\n */\n function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override {\n super._beforeTokenTransfer(from, to, tokenId);\n\n require(!paused(), \"ERC721Pausable: token transfer while paused\");\n }\n}\n", "sourcePath": "contracts/token/ERC721/ERC721Pausable.sol", "sourceMap": "", "deployedSourceMap": "", "abi": [ { "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": false, "internalType": "address", "name": "account", "type": "address" } ], "name": "Paused", "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" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "account", "type": "address" } ], "name": "Unpaused", "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": [], "name": "baseURI", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "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": [], "name": "paused", "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": "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": "index", "type": "uint256" } ], "name": "tokenByIndex", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "uint256", "name": "index", "type": "uint256" } ], "name": "tokenOfOwnerByIndex", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "tokenURI", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "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" } ], "ast": { "absolutePath": "contracts/token/ERC721/ERC721Pausable.sol", "exportedSymbols": { "ERC721Pausable": [ 11125 ] }, "id": 11126, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 11090, "literals": [ "solidity", "^", "0.7", ".0" ], "nodeType": "PragmaDirective", "src": "33:23:95" }, { "absolutePath": "contracts/token/ERC721/ERC721.sol", "file": "./ERC721.sol", "id": 11091, "nodeType": "ImportDirective", "scope": 11126, "sourceUnit": 11032, "src": "58:22:95", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "contracts/utils/Pausable.sol", "file": "../../utils/Pausable.sol", "id": 11092, "nodeType": "ImportDirective", "scope": 11126, "sourceUnit": 13995, "src": "81:34:95", "symbolAliases": [], "unitAlias": "" }, { "abstract": true, "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 11094, "name": "ERC721", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 11031, "src": "424:6:95", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC721_$11031", "typeString": "contract ERC721" } }, "id": 11095, "nodeType": "InheritanceSpecifier", "src": "424:6:95" }, { "arguments": null, "baseName": { "contractScope": null, "id": 11096, "name": "Pausable", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 13994, "src": "432:8:95", "typeDescriptions": { "typeIdentifier": "t_contract$_Pausable_$13994", "typeString": "contract Pausable" } }, "id": 11097, "nodeType": "InheritanceSpecifier", "src": "432:8:95" } ], "contractDependencies": [ 22, 1802, 2048, 11031, 11241, 11272, 11299, 13994 ], "contractKind": "contract", "documentation": { "id": 11093, "nodeType": "StructuredDocumentation", "src": "117:270:95", "text": " @dev ERC721 token with pausable token transfers, minting and burning.\n Useful for scenarios such as preventing trades until the end of an evaluation\n period, or having an emergency switch for freezing all token transfers in the\n event of a large bug." }, "fullyImplemented": false, "id": 11125, "linearizedBaseContracts": [ 11125, 13994, 11031, 11272, 11299, 11241, 1802, 2048, 22 ], "name": "ERC721Pausable", "nodeType": "ContractDefinition", "nodes": [ { "baseFunctions": [ 11030 ], "body": { "id": 11123, "nodeType": "Block", "src": "686:138:95", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 11111, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11100, "src": "723:4:95", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 11112, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11102, "src": "729:2:95", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 11113, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11104, "src": "733:7:95", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 11108, "name": "super", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -25, "src": "696:5:95", "typeDescriptions": { "typeIdentifier": "t_super$_ERC721Pausable_$11125", "typeString": "contract super ERC721Pausable" } }, "id": 11110, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "_beforeTokenTransfer", "nodeType": "MemberAccess", "referencedDeclaration": 11030, "src": "696:26:95", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 11114, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "696:45:95", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11115, "nodeType": "ExpressionStatement", "src": "696:45:95" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 11119, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "760:9:95", "subExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 11117, "name": "paused", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13940, "src": "761:6:95", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_bool_$", "typeString": "function () view returns (bool)" } }, "id": 11118, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "761:8:95", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, 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"typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 11121, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "752:65:95", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11122, "nodeType": "ExpressionStatement", "src": "752:65:95" } ] }, "documentation": { "id": 11098, "nodeType": "StructuredDocumentation", "src": "447:135:95", "text": " @dev See {ERC721-_beforeTokenTransfer}.\n Requirements:\n - the contract must not be paused." }, "id": 11124, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nodeType": "FunctionDefinition", "overrides": { "id": 11106, "nodeType": "OverrideSpecifier", "overrides": [], "src": "677:8:95" }, "parameters": { "id": 11105, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 11100, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "overrides": null, "scope": 11124, "src": "617:12:95", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 11099, "name": "address", "nodeType": "ElementaryTypeName", "src": "617:7:95", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 11102, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "overrides": null, "scope": 11124, "src": "631:10:95", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 11101, "name": "address", "nodeType": "ElementaryTypeName", "src": "631:7:95", "stateMutability": "nonpayable", 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