{ "abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "spender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "spender", "type": "address" } ], "name": "allowance", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "approve", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "account", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "decimals", "outputs": [ { "internalType": "uint8", "name": "", "type": "uint8" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "subtractedValue", "type": "uint256" } ], "name": "decreaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "addedValue", "type": "uint256" } ], "name": "increaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "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": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transfer", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" } ], "allSourcePaths": { "72": "node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol", "75": "node_modules/@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol", "76": "node_modules/@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol", "77": "node_modules/@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol", "83": "node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol" }, "ast": { "absolutePath": "node_modules/@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol", "exportedSymbols": { "AddressUpgradeable": [ 16246 ], "ContextUpgradeable": [ 26020 ], "ERC20Upgradeable": [ 21434 ], "IERC20MetadataUpgradeable": [ 27212 ], "IERC20Upgradeable": [ 27187 ], "Initializable": [ 19544 ] }, "id": 21435, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 20823, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "105:23:75" }, { "absolutePath": "node_modules/@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol", "file": "./IERC20Upgradeable.sol", "id": 20824, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 21435, "sourceUnit": 27188, "src": "130:33:75", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "node_modules/@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol", "file": "./extensions/IERC20MetadataUpgradeable.sol", "id": 20825, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 21435, "sourceUnit": 27213, "src": "164:52:75", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol", "file": "../../utils/ContextUpgradeable.sol", "id": 20826, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 21435, "sourceUnit": 26021, "src": "217:44:75", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol", "file": "../../proxy/utils/Initializable.sol", "id": 20827, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 21435, "sourceUnit": 19545, "src": "262:45:75", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 20829, "name": "Initializable", "nodeType": "IdentifierPath", "referencedDeclaration": 19544, "src": "1511:13:75" }, "id": 20830, "nodeType": "InheritanceSpecifier", "src": "1511:13:75" }, { "baseName": { "id": 20831, "name": "ContextUpgradeable", "nodeType": "IdentifierPath", "referencedDeclaration": 26020, "src": "1526:18:75" }, "id": 20832, "nodeType": "InheritanceSpecifier", "src": "1526:18:75" }, { "baseName": { "id": 20833, "name": "IERC20Upgradeable", "nodeType": "IdentifierPath", "referencedDeclaration": 27187, "src": "1546:17:75" }, "id": 20834, "nodeType": "InheritanceSpecifier", "src": "1546:17:75" }, { "baseName": { "id": 20835, "name": "IERC20MetadataUpgradeable", "nodeType": "IdentifierPath", "referencedDeclaration": 27212, "src": "1565:25:75" }, "id": 20836, "nodeType": "InheritanceSpecifier", "src": "1565:25:75" } ], "contractDependencies": [], "contractKind": "contract", "documentation": { "id": 20828, "nodeType": "StructuredDocumentation", "src": "309:1172:75", "text": " @dev Implementation of the {IERC20} interface.\n This implementation is agnostic to the way tokens are created. This means\n that a supply mechanism has to be added in a derived contract using {_mint}.\n For a generic mechanism see {ERC20PresetMinterPauser}.\n TIP: For a detailed writeup see our guide\n https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n to implement supply mechanisms].\n We have followed general OpenZeppelin Contracts guidelines: functions revert\n instead returning `false` on failure. This behavior is nonetheless\n conventional and does not conflict with the expectations of ERC20\n applications.\n Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n This allows applications to reconstruct the allowance for all accounts just\n by listening to said events. Other implementations of the EIP may not emit\n these events, as it isn't required by the specification.\n Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n functions have been added to mitigate the well-known issues around setting\n allowances. See {IERC20-approve}." }, "fullyImplemented": true, "id": 21434, "linearizedBaseContracts": [ 21434, 27212, 27187, 26020, 19544 ], "name": "ERC20Upgradeable", "nameLocation": "1491:16:75", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 20840, "mutability": "mutable", "name": "_balances", "nameLocation": "1633:9:75", "nodeType": "VariableDeclaration", "scope": 21434, "src": "1597:45:75", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 20839, "keyType": { "id": 20837, "name": "address", "nodeType": "ElementaryTypeName", "src": "1605:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1597:27:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 20838, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1616:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "visibility": "private" }, { "constant": false, "id": 20846, "mutability": "mutable", "name": "_allowances", "nameLocation": "1705:11:75", "nodeType": "VariableDeclaration", "scope": 21434, "src": "1649:67:75", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "typeName": { "id": 20845, "keyType": { "id": 20841, "name": "address", "nodeType": "ElementaryTypeName", "src": "1657:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1649:47:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "valueType": { "id": 20844, "keyType": { "id": 20842, "name": "address", "nodeType": "ElementaryTypeName", "src": "1676:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1668:27:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 20843, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1687:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } } }, "visibility": "private" }, { "constant": false, "id": 20848, "mutability": "mutable", "name": "_totalSupply", "nameLocation": "1739:12:75", "nodeType": "VariableDeclaration", "scope": 21434, "src": "1723:28:75", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 20847, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1723:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "private" }, { "constant": false, "id": 20850, "mutability": "mutable", "name": "_name", "nameLocation": "1773:5:75", "nodeType": "VariableDeclaration", "scope": 21434, "src": "1758:20:75", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 20849, "name": "string", "nodeType": "ElementaryTypeName", "src": "1758:6:75", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 20852, "mutability": "mutable", "name": "_symbol", "nameLocation": "1799:7:75", "nodeType": "VariableDeclaration", "scope": 21434, "src": "1784:22:75", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 20851, "name": "string", "nodeType": "ElementaryTypeName", "src": "1784:6:75", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "body": { "id": 20867, "nodeType": "Block", "src": "2208:55:75", "statements": [ { "expression": { "arguments": [ { "id": 20863, "name": "name_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20855, "src": "2241:5:75", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "id": 20864, "name": "symbol_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20857, "src": "2248:7:75", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" }, { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } ], "id": 20862, "name": "__ERC20_init_unchained", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20886, "src": "2218:22:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_string_memory_ptr_$_t_string_memory_ptr_$returns$__$", "typeString": "function (string memory,string memory)" } }, "id": 20865, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2218:38:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 20866, "nodeType": "ExpressionStatement", "src": "2218:38:75" } ] }, "documentation": { "id": 20853, "nodeType": "StructuredDocumentation", "src": "1813:298:75", "text": " @dev Sets the values for {name} and {symbol}.\n The default value of {decimals} is 18. To select a different value for\n {decimals} you should overload it.\n All two of these values are immutable: they can only be set once during\n construction." }, "id": 20868, "implemented": true, "kind": "function", "modifiers": [ { "id": 20860, "kind": "modifierInvocation", "modifierName": { "id": 20859, "name": "onlyInitializing", "nodeType": "IdentifierPath", "referencedDeclaration": 19528, "src": "2191:16:75" }, "nodeType": "ModifierInvocation", "src": "2191:16:75" } ], "name": "__ERC20_init", "nameLocation": "2125:12:75", "nodeType": "FunctionDefinition", "parameters": { "id": 20858, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20855, "mutability": "mutable", "name": "name_", "nameLocation": "2152:5:75", "nodeType": "VariableDeclaration", "scope": 20868, "src": "2138:19:75", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 20854, "name": "string", "nodeType": "ElementaryTypeName", "src": "2138:6:75", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 20857, "mutability": "mutable", "name": "symbol_", "nameLocation": "2173:7:75", "nodeType": "VariableDeclaration", "scope": 20868, "src": "2159:21:75", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 20856, "name": "string", "nodeType": "ElementaryTypeName", "src": "2159:6:75", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2137:44:75" }, "returnParameters": { "id": 20861, "nodeType": "ParameterList", "parameters": [], "src": "2208:0:75" }, "scope": 21434, "src": "2116:147:75", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 20885, "nodeType": "Block", "src": "2371:57:75", "statements": [ { "expression": { "id": 20879, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 20877, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20850, "src": "2381:5:75", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 20878, "name": "name_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20870, "src": "2389:5:75", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "2381:13:75", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 20880, "nodeType": "ExpressionStatement", "src": "2381:13:75" }, { "expression": { "id": 20883, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 20881, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20852, "src": "2404:7:75", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 20882, "name": "symbol_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20872, "src": "2414:7:75", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "2404:17:75", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 20884, "nodeType": "ExpressionStatement", "src": "2404:17:75" } ] }, "id": 20886, "implemented": true, "kind": "function", "modifiers": [ { "id": 20875, "kind": "modifierInvocation", "modifierName": { "id": 20874, "name": "onlyInitializing", "nodeType": "IdentifierPath", "referencedDeclaration": 19528, "src": "2354:16:75" }, "nodeType": "ModifierInvocation", "src": "2354:16:75" } ], "name": "__ERC20_init_unchained", "nameLocation": "2278:22:75", "nodeType": "FunctionDefinition", "parameters": { "id": 20873, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20870, "mutability": "mutable", "name": "name_", "nameLocation": "2315:5:75", "nodeType": "VariableDeclaration", "scope": 20886, "src": "2301:19:75", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 20869, "name": "string", "nodeType": "ElementaryTypeName", "src": "2301:6:75", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 20872, "mutability": "mutable", "name": "symbol_", "nameLocation": "2336:7:75", "nodeType": "VariableDeclaration", "scope": 20886, "src": "2322:21:75", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 20871, "name": "string", "nodeType": "ElementaryTypeName", "src": "2322:6:75", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2300:44:75" }, "returnParameters": { "id": 20876, "nodeType": "ParameterList", "parameters": [], "src": "2371:0:75" }, "scope": 21434, "src": "2269:159:75", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "baseFunctions": [ 27199 ], "body": { "id": 20895, "nodeType": "Block", "src": "2562:29:75", "statements": [ { "expression": { "id": 20893, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20850, "src": "2579:5:75", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 20892, "id": 20894, "nodeType": "Return", "src": "2572:12:75" } ] }, "documentation": { "id": 20887, "nodeType": "StructuredDocumentation", "src": "2434:54:75", "text": " @dev Returns the name of the token." }, "functionSelector": "06fdde03", "id": 20896, "implemented": true, "kind": "function", "modifiers": [], "name": "name", "nameLocation": "2502:4:75", "nodeType": "FunctionDefinition", "overrides": { "id": 20889, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2529:8:75" }, "parameters": { "id": 20888, "nodeType": "ParameterList", "parameters": [], "src": "2506:2:75" }, "returnParameters": { "id": 20892, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20891, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 20896, "src": "2547:13:75", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 20890, "name": "string", "nodeType": "ElementaryTypeName", "src": "2547:6:75", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2546:15:75" }, "scope": 21434, "src": "2493:98:75", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 27205 ], "body": { "id": 20905, "nodeType": "Block", "src": "2775:31:75", "statements": [ { "expression": { "id": 20903, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20852, "src": "2792:7:75", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 20902, "id": 20904, "nodeType": "Return", "src": "2785:14:75" } ] }, "documentation": { "id": 20897, "nodeType": "StructuredDocumentation", "src": "2597:102:75", "text": " @dev Returns the symbol of the token, usually a shorter version of the\n name." }, "functionSelector": "95d89b41", "id": 20906, "implemented": true, "kind": "function", "modifiers": [], "name": "symbol", "nameLocation": "2713:6:75", "nodeType": "FunctionDefinition", "overrides": { "id": 20899, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2742:8:75" }, "parameters": { "id": 20898, "nodeType": "ParameterList", "parameters": [], "src": "2719:2:75" }, "returnParameters": { "id": 20902, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20901, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 20906, "src": "2760:13:75", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 20900, "name": "string", "nodeType": "ElementaryTypeName", "src": "2760:6:75", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2759:15:75" }, "scope": 21434, "src": "2704:102:75", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 27211 ], "body": { "id": 20915, "nodeType": "Block", "src": "3495:26:75", "statements": [ { "expression": { "hexValue": "3138", "id": 20913, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "3512:2:75", "typeDescriptions": { "typeIdentifier": "t_rational_18_by_1", "typeString": "int_const 18" }, "value": "18" }, "functionReturnParameters": 20912, "id": 20914, "nodeType": "Return", "src": "3505:9:75" } ] }, "documentation": { "id": 20907, "nodeType": "StructuredDocumentation", "src": "2812:613:75", "text": " @dev Returns the number of decimals used to get its user representation.\n For example, if `decimals` equals `2`, a balance of `505` tokens should\n be displayed to a user as `5.05` (`505 / 10 ** 2`).\n Tokens usually opt for a value of 18, imitating the relationship between\n Ether and Wei. This is the value {ERC20} uses, unless this function is\n overridden;\n NOTE: This information is only used for _display_ purposes: it in\n no way affects any of the arithmetic of the contract, including\n {IERC20-balanceOf} and {IERC20-transfer}." }, "functionSelector": "313ce567", "id": 20916, "implemented": true, "kind": "function", "modifiers": [], "name": "decimals", "nameLocation": "3439:8:75", "nodeType": "FunctionDefinition", "overrides": { "id": 20909, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3470:8:75" }, "parameters": { "id": 20908, "nodeType": "ParameterList", "parameters": [], "src": "3447:2:75" }, "returnParameters": { "id": 20912, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20911, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 20916, "src": "3488:5:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 20910, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "3488:5:75", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "src": "3487:7:75" }, "scope": 21434, "src": "3430:91:75", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 27118 ], "body": { "id": 20925, "nodeType": "Block", "src": "3651:36:75", "statements": [ { "expression": { "id": 20923, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20848, "src": "3668:12:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 20922, "id": 20924, "nodeType": "Return", "src": "3661:19:75" } ] }, "documentation": { "id": 20917, "nodeType": "StructuredDocumentation", "src": "3527:49:75", "text": " @dev See {IERC20-totalSupply}." }, "functionSelector": "18160ddd", "id": 20926, "implemented": true, "kind": "function", "modifiers": [], "name": "totalSupply", "nameLocation": "3590:11:75", "nodeType": "FunctionDefinition", "overrides": { "id": 20919, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3624:8:75" }, "parameters": { "id": 20918, "nodeType": "ParameterList", "parameters": [], "src": "3601:2:75" }, "returnParameters": { "id": 20922, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20921, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 20926, "src": "3642:7:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 20920, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3642:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3641:9:75" }, "scope": 21434, "src": "3581:106:75", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 27126 ], "body": { "id": 20939, "nodeType": "Block", "src": "3828:42:75", "statements": [ { "expression": { "baseExpression": { "id": 20935, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20840, "src": "3845:9:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 20937, "indexExpression": { "id": 20936, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20929, "src": "3855:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3845:18:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 20934, "id": 20938, "nodeType": "Return", "src": "3838:25:75" } ] }, "documentation": { "id": 20927, "nodeType": "StructuredDocumentation", "src": "3693:47:75", "text": " @dev See {IERC20-balanceOf}." }, "functionSelector": "70a08231", "id": 20940, "implemented": true, "kind": "function", "modifiers": [], "name": "balanceOf", "nameLocation": "3754:9:75", "nodeType": "FunctionDefinition", "overrides": { "id": 20931, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3801:8:75" }, "parameters": { "id": 20930, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20929, "mutability": "mutable", "name": "account", "nameLocation": "3772:7:75", "nodeType": "VariableDeclaration", "scope": 20940, "src": "3764:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 20928, "name": "address", "nodeType": "ElementaryTypeName", "src": "3764:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "3763:17:75" }, "returnParameters": { "id": 20934, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20933, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 20940, "src": "3819:7:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 20932, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3819:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3818:9:75" }, "scope": 21434, "src": "3745:125:75", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 27136 ], "body": { "id": 20964, "nodeType": "Block", "src": "4151:104:75", "statements": [ { "assignments": [ 20952 ], "declarations": [ { "constant": false, "id": 20952, "mutability": "mutable", "name": "owner", "nameLocation": "4169:5:75", "nodeType": "VariableDeclaration", "scope": 20964, "src": "4161:13:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 20951, "name": "address", "nodeType": "ElementaryTypeName", "src": "4161:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 20955, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 20953, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 26005, "src": "4177:10:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 20954, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4177:12:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "4161:28:75" }, { "expression": { "arguments": [ { "id": 20957, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20952, "src": "4209:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 20958, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20943, "src": "4216:2:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 20959, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20945, "src": "4220:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 20956, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21190, "src": "4199:9:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 20960, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4199:28:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 20961, "nodeType": "ExpressionStatement", "src": "4199:28:75" }, { "expression": { "hexValue": "74727565", "id": 20962, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4244:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 20950, "id": 20963, "nodeType": "Return", "src": "4237:11:75" } ] }, "documentation": { "id": 20941, "nodeType": "StructuredDocumentation", "src": "3876:185:75", "text": " @dev See {IERC20-transfer}.\n Requirements:\n - `to` cannot be the zero address.\n - the caller must have a balance of at least `amount`." }, "functionSelector": "a9059cbb", "id": 20965, "implemented": true, "kind": "function", "modifiers": [], "name": "transfer", "nameLocation": "4075:8:75", "nodeType": "FunctionDefinition", "overrides": { "id": 20947, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4127:8:75" }, "parameters": { "id": 20946, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20943, "mutability": "mutable", "name": "to", "nameLocation": "4092:2:75", "nodeType": "VariableDeclaration", "scope": 20965, "src": "4084:10:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 20942, "name": "address", "nodeType": "ElementaryTypeName", "src": "4084:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 20945, "mutability": "mutable", "name": "amount", "nameLocation": "4104:6:75", "nodeType": "VariableDeclaration", "scope": 20965, "src": "4096:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 20944, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4096:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4083:28:75" }, "returnParameters": { "id": 20950, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20949, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 20965, "src": "4145:4:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 20948, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4145:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "4144:6:75" }, "scope": 21434, "src": "4066:189:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 27146 ], "body": { "id": 20982, "nodeType": "Block", "src": "4411:51:75", "statements": [ { "expression": { "baseExpression": { "baseExpression": { "id": 20976, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20846, "src": "4428:11:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 20978, "indexExpression": { "id": 20977, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20968, "src": "4440:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4428:18:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 20980, "indexExpression": { "id": 20979, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20970, "src": "4447:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4428:27:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 20975, "id": 20981, "nodeType": "Return", "src": "4421:34:75" } ] }, "documentation": { "id": 20966, "nodeType": "StructuredDocumentation", "src": "4261:47:75", "text": " @dev See {IERC20-allowance}." }, "functionSelector": "dd62ed3e", "id": 20983, "implemented": true, "kind": "function", "modifiers": [], "name": "allowance", "nameLocation": "4322:9:75", "nodeType": "FunctionDefinition", "overrides": { "id": 20972, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4384:8:75" }, "parameters": { "id": 20971, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20968, "mutability": "mutable", "name": "owner", "nameLocation": "4340:5:75", "nodeType": "VariableDeclaration", "scope": 20983, "src": "4332:13:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 20967, "name": "address", "nodeType": "ElementaryTypeName", "src": "4332:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 20970, "mutability": "mutable", "name": "spender", "nameLocation": "4355:7:75", "nodeType": "VariableDeclaration", "scope": 20983, "src": "4347:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 20969, "name": "address", "nodeType": "ElementaryTypeName", "src": "4347:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "4331:32:75" }, "returnParameters": { "id": 20975, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20974, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 20983, "src": "4402:7:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 20973, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4402:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4401:9:75" }, "scope": 21434, "src": "4313:149:75", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 27156 ], "body": { "id": 21007, "nodeType": "Block", "src": "4859:108:75", "statements": [ { "assignments": [ 20995 ], "declarations": [ { "constant": false, "id": 20995, "mutability": "mutable", "name": "owner", "nameLocation": "4877:5:75", "nodeType": "VariableDeclaration", "scope": 21007, "src": "4869:13:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 20994, "name": "address", "nodeType": "ElementaryTypeName", "src": "4869:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 20998, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 20996, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 26005, "src": "4885:10:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 20997, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4885:12:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "4869:28:75" }, { "expression": { "arguments": [ { "id": 21000, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20995, "src": "4916:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21001, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20986, "src": "4923:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21002, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20988, "src": "4932:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 20999, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21363, "src": "4907:8:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21003, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4907:32:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21004, "nodeType": "ExpressionStatement", "src": "4907:32:75" }, { "expression": { "hexValue": "74727565", "id": 21005, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4956:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 20993, "id": 21006, "nodeType": "Return", "src": "4949:11:75" } ] }, "documentation": { "id": 20984, "nodeType": "StructuredDocumentation", "src": "4468:297:75", "text": " @dev See {IERC20-approve}.\n NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on\n `transferFrom`. This is semantically equivalent to an infinite approval.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "095ea7b3", "id": 21008, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nameLocation": "4779:7:75", "nodeType": "FunctionDefinition", "overrides": { "id": 20990, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4835:8:75" }, "parameters": { "id": 20989, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20986, "mutability": "mutable", "name": "spender", "nameLocation": "4795:7:75", "nodeType": "VariableDeclaration", "scope": 21008, "src": "4787:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 20985, "name": "address", "nodeType": "ElementaryTypeName", "src": "4787:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 20988, "mutability": "mutable", "name": "amount", "nameLocation": "4812:6:75", "nodeType": "VariableDeclaration", "scope": 21008, "src": "4804:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 20987, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4804:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4786:33:75" }, "returnParameters": { "id": 20993, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20992, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 21008, "src": "4853:4:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 20991, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4853:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "4852:6:75" }, "scope": 21434, "src": "4770:197:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 27168 ], "body": { "id": 21040, "nodeType": "Block", "src": "5662:153:75", "statements": [ { "assignments": [ 21022 ], "declarations": [ { "constant": false, "id": 21022, "mutability": "mutable", "name": "spender", "nameLocation": "5680:7:75", "nodeType": "VariableDeclaration", "scope": 21040, "src": "5672:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21021, "name": "address", "nodeType": "ElementaryTypeName", "src": "5672:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 21025, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 21023, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 26005, "src": "5690:10:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 21024, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5690:12:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "5672:30:75" }, { "expression": { "arguments": [ { "id": 21027, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21011, "src": "5728:4:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21028, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21022, "src": "5734:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21029, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21015, "src": "5743:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21026, "name": "_spendAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21406, "src": "5712:15:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21030, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5712:38:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21031, "nodeType": "ExpressionStatement", "src": "5712:38:75" }, { "expression": { "arguments": [ { "id": 21033, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21011, "src": "5770:4:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21034, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21013, "src": "5776:2:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21035, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21015, "src": "5780:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21032, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21190, "src": "5760:9:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21036, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5760:27:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21037, "nodeType": "ExpressionStatement", "src": "5760:27:75" }, { "expression": { "hexValue": "74727565", "id": 21038, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "5804:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 21020, "id": 21039, "nodeType": "Return", "src": "5797:11:75" } ] }, "documentation": { "id": 21009, "nodeType": "StructuredDocumentation", "src": "4973:551:75", "text": " @dev See {IERC20-transferFrom}.\n Emits an {Approval} event indicating the updated allowance. This is not\n required by the EIP. See the note at the beginning of {ERC20}.\n NOTE: Does not update the allowance if the current allowance\n is the maximum `uint256`.\n Requirements:\n - `from` and `to` cannot be the zero address.\n - `from` must have a balance of at least `amount`.\n - the caller must have allowance for ``from``'s tokens of at least\n `amount`." }, "functionSelector": "23b872dd", "id": 21041, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nameLocation": "5538:12:75", "nodeType": "FunctionDefinition", "overrides": { "id": 21017, "nodeType": "OverrideSpecifier", "overrides": [], "src": "5638:8:75" }, "parameters": { "id": 21016, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21011, "mutability": "mutable", "name": "from", "nameLocation": "5568:4:75", "nodeType": "VariableDeclaration", "scope": 21041, "src": "5560:12:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21010, "name": "address", "nodeType": "ElementaryTypeName", "src": "5560:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21013, "mutability": "mutable", "name": "to", "nameLocation": "5590:2:75", "nodeType": "VariableDeclaration", "scope": 21041, "src": "5582:10:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21012, "name": "address", "nodeType": "ElementaryTypeName", "src": "5582:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21015, "mutability": "mutable", "name": "amount", "nameLocation": "5610:6:75", "nodeType": "VariableDeclaration", "scope": 21041, "src": "5602:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21014, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5602:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "5550:72:75" }, "returnParameters": { "id": 21020, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21019, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 21041, "src": "5656:4:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 21018, "name": "bool", "nodeType": "ElementaryTypeName", "src": "5656:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "5655:6:75" }, "scope": 21434, "src": "5529:286:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 21070, "nodeType": "Block", "src": "6304:142:75", "statements": [ { "assignments": [ 21052 ], "declarations": [ { "constant": false, "id": 21052, "mutability": "mutable", "name": "owner", "nameLocation": "6322:5:75", "nodeType": "VariableDeclaration", "scope": 21070, "src": "6314:13:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21051, "name": "address", "nodeType": "ElementaryTypeName", "src": "6314:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 21055, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 21053, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 26005, "src": "6330:10:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 21054, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6330:12:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "6314:28:75" }, { "expression": { "arguments": [ { "id": 21057, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21052, "src": "6361:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21058, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21044, "src": "6368:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21065, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "baseExpression": { "baseExpression": { "id": 21059, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20846, "src": "6377:11:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 21061, "indexExpression": { "id": 21060, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21052, "src": "6389:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6377:18:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 21063, "indexExpression": { "id": 21062, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21044, "src": "6396:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6377:27:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "id": 21064, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21046, "src": "6407:10:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6377:40:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21056, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21363, "src": "6352:8:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21066, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6352:66:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21067, "nodeType": "ExpressionStatement", "src": "6352:66:75" }, { "expression": { "hexValue": "74727565", "id": 21068, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "6435:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 21050, "id": 21069, "nodeType": "Return", "src": "6428:11:75" } ] }, "documentation": { "id": 21042, "nodeType": "StructuredDocumentation", "src": "5821:384:75", "text": " @dev Atomically increases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "39509351", "id": 21071, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nameLocation": "6219:17:75", "nodeType": "FunctionDefinition", "parameters": { "id": 21047, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21044, "mutability": "mutable", "name": "spender", "nameLocation": "6245:7:75", "nodeType": "VariableDeclaration", "scope": 21071, "src": "6237:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21043, "name": "address", "nodeType": "ElementaryTypeName", "src": "6237:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21046, "mutability": "mutable", "name": "addedValue", "nameLocation": "6262:10:75", "nodeType": "VariableDeclaration", "scope": 21071, "src": "6254:18:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21045, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6254:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "6236:37:75" }, "returnParameters": { "id": 21050, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21049, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 21071, "src": "6298:4:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 21048, "name": "bool", "nodeType": "ElementaryTypeName", "src": "6298:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "6297:6:75" }, "scope": 21434, "src": "6210:236:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 21112, "nodeType": "Block", "src": "7032:330:75", "statements": [ { "assignments": [ 21082 ], "declarations": [ { "constant": false, "id": 21082, "mutability": "mutable", "name": "owner", "nameLocation": "7050:5:75", "nodeType": "VariableDeclaration", "scope": 21112, "src": "7042:13:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21081, "name": "address", "nodeType": "ElementaryTypeName", "src": "7042:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 21085, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 21083, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 26005, "src": "7058:10:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 21084, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7058:12:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7042:28:75" }, { "assignments": [ 21087 ], "declarations": [ { "constant": false, "id": 21087, "mutability": "mutable", "name": "currentAllowance", "nameLocation": "7088:16:75", "nodeType": "VariableDeclaration", "scope": 21112, "src": "7080:24:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21086, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7080:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 21093, "initialValue": { "baseExpression": { "baseExpression": { "id": 21088, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20846, "src": "7107:11:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 21090, "indexExpression": { "id": 21089, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21082, "src": "7119:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7107:18:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 21092, "indexExpression": { "id": 21091, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21074, "src": "7126:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7107:27:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "7080:54:75" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21097, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21095, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21087, "src": "7152:16:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 21096, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21076, "src": "7172:15:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7152:35:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 21098, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7189:39:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" }, "value": "ERC20: decreased allowance below zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" } ], "id": 21094, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "7144:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21099, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7144:85:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21100, "nodeType": "ExpressionStatement", "src": "7144:85:75" }, { "id": 21109, "nodeType": "UncheckedBlock", "src": "7239:95:75", "statements": [ { "expression": { "arguments": [ { "id": 21102, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21082, "src": "7272:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21103, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21074, "src": "7279:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21106, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21104, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21087, "src": "7288:16:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 21105, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21076, "src": "7307:15:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7288:34:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21101, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21363, "src": "7263:8:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21107, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7263:60:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21108, "nodeType": "ExpressionStatement", "src": "7263:60:75" } ] }, { "expression": { "hexValue": "74727565", "id": 21110, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "7351:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 21080, "id": 21111, "nodeType": "Return", "src": "7344:11:75" } ] }, "documentation": { "id": 21072, "nodeType": "StructuredDocumentation", "src": "6452:476:75", "text": " @dev Atomically decreases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address.\n - `spender` must have allowance for the caller of at least\n `subtractedValue`." }, "functionSelector": "a457c2d7", "id": 21113, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nameLocation": "6942:17:75", "nodeType": "FunctionDefinition", "parameters": { "id": 21077, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21074, "mutability": "mutable", "name": "spender", "nameLocation": "6968:7:75", "nodeType": "VariableDeclaration", "scope": 21113, "src": "6960:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21073, "name": "address", "nodeType": "ElementaryTypeName", "src": "6960:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21076, "mutability": "mutable", "name": "subtractedValue", "nameLocation": "6985:15:75", "nodeType": "VariableDeclaration", "scope": 21113, "src": "6977:23:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21075, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6977:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "6959:42:75" }, "returnParameters": { "id": 21080, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21079, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 21113, "src": "7026:4:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 21078, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7026:4:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7025:6:75" }, "scope": 21434, "src": "6933:429:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 21189, "nodeType": "Block", "src": "7933:543:75", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 21129, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21124, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21116, "src": "7951:4:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 21127, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7967:1:75", "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": 21126, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7959:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21125, "name": "address", "nodeType": "ElementaryTypeName", "src": "7959:7:75", "typeDescriptions": {} } }, "id": 21128, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7959:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7951:18:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e736665722066726f6d20746865207a65726f2061646472657373", "id": 21130, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7971:39:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" }, "value": "ERC20: transfer from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" } ], "id": 21123, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "7943:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21131, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7943:68:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21132, "nodeType": "ExpressionStatement", "src": "7943:68:75" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 21139, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21134, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21118, "src": "8029:2:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 21137, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8043:1:75", "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": 21136, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8035:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21135, "name": "address", "nodeType": "ElementaryTypeName", "src": "8035:7:75", "typeDescriptions": {} } }, "id": 21138, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8035:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8029:16:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 21140, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8047:37:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" }, "value": "ERC20: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" } ], "id": 21133, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "8021:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21141, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8021:64:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21142, "nodeType": "ExpressionStatement", "src": "8021:64:75" }, { "expression": { "arguments": [ { "id": 21144, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21116, "src": "8117:4:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21145, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21118, "src": "8123:2:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21146, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21120, "src": "8127:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21143, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21417, "src": "8096:20:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21147, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8096:38:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21148, "nodeType": "ExpressionStatement", "src": "8096:38:75" }, { "assignments": [ 21150 ], "declarations": [ { "constant": false, "id": 21150, "mutability": "mutable", "name": "fromBalance", "nameLocation": "8153:11:75", "nodeType": "VariableDeclaration", "scope": 21189, "src": "8145:19:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21149, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8145:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 21154, "initialValue": { "baseExpression": { "id": 21151, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20840, "src": "8167:9:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 21153, "indexExpression": { "id": 21152, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21116, "src": "8177:4:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "8167:15:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "8145:37:75" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21158, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21156, "name": "fromBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21150, "src": "8200:11:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 21157, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21120, "src": "8215:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8200:21:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220616d6f756e7420657863656564732062616c616e6365", "id": 21159, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8223:40:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" }, "value": "ERC20: transfer amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" } ], "id": 21155, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "8192:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21160, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8192:72:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21161, "nodeType": "ExpressionStatement", "src": "8192:72:75" }, { "id": 21170, "nodeType": "UncheckedBlock", "src": "8274:73:75", "statements": [ { "expression": { "id": 21168, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 21162, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20840, "src": "8298:9:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 21164, "indexExpression": { "id": 21163, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21116, "src": "8308:4:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8298:15:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21167, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21165, "name": "fromBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21150, "src": "8316:11:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 21166, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21120, "src": "8330:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8316:20:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8298:38:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 21169, "nodeType": "ExpressionStatement", "src": "8298:38:75" } ] }, { "expression": { "id": 21175, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 21171, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20840, "src": "8356:9:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 21173, "indexExpression": { "id": 21172, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21118, "src": "8366:2:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8356:13:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 21174, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21120, "src": "8373:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8356:23:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 21176, "nodeType": "ExpressionStatement", "src": "8356:23:75" }, { "eventCall": { "arguments": [ { "id": 21178, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21116, "src": "8404:4:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21179, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21118, "src": "8410:2:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21180, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21120, "src": "8414:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21177, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 27177, "src": "8395:8:75", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21181, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8395:26:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21182, "nodeType": "EmitStatement", "src": "8390:31:75" }, { "expression": { "arguments": [ { "id": 21184, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21116, "src": "8452:4:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21185, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21118, "src": "8458:2:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21186, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21120, "src": "8462:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21183, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21428, "src": "8432:19:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21187, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8432:37:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21188, "nodeType": "ExpressionStatement", "src": "8432:37:75" } ] }, "documentation": { "id": 21114, "nodeType": "StructuredDocumentation", "src": "7368:452:75", "text": " @dev Moves `amount` of tokens from `sender` to `recipient`.\n This internal function is equivalent to {transfer}, and can be used to\n e.g. implement automatic token fees, slashing mechanisms, etc.\n Emits a {Transfer} event.\n Requirements:\n - `from` cannot be the zero address.\n - `to` cannot be the zero address.\n - `from` must have a balance of at least `amount`." }, "id": 21190, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nameLocation": "7834:9:75", "nodeType": "FunctionDefinition", "parameters": { "id": 21121, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21116, "mutability": "mutable", "name": "from", "nameLocation": "7861:4:75", "nodeType": "VariableDeclaration", "scope": 21190, "src": "7853:12:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21115, "name": "address", "nodeType": "ElementaryTypeName", "src": "7853:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21118, "mutability": "mutable", "name": "to", "nameLocation": "7883:2:75", "nodeType": "VariableDeclaration", "scope": 21190, "src": "7875:10:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21117, "name": "address", "nodeType": "ElementaryTypeName", "src": "7875:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21120, "mutability": "mutable", "name": "amount", "nameLocation": "7903:6:75", "nodeType": "VariableDeclaration", "scope": 21190, "src": "7895:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21119, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7895:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7843:72:75" }, "returnParameters": { "id": 21122, "nodeType": "ParameterList", "parameters": [], "src": "7933:0:75" }, "scope": 21434, "src": "7825:651:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 21245, "nodeType": "Block", "src": "8817:324:75", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 21204, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21199, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21193, "src": "8835:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 21202, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8854:1:75", "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": 21201, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8846:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21200, "name": "address", "nodeType": "ElementaryTypeName", "src": "8846:7:75", "typeDescriptions": {} } }, "id": 21203, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8846:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8835:21:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206d696e7420746f20746865207a65726f2061646472657373", "id": 21205, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8858:33:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" }, "value": "ERC20: mint to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" } ], "id": 21198, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "8827:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21206, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8827:65:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21207, "nodeType": "ExpressionStatement", "src": "8827:65:75" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 21211, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8932:1:75", "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": 21210, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8924:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21209, "name": "address", "nodeType": "ElementaryTypeName", "src": "8924:7:75", "typeDescriptions": {} } }, "id": 21212, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8924:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21213, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21193, "src": "8936:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21214, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21195, "src": "8945:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21208, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21417, "src": "8903:20:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21215, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8903:49:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21216, "nodeType": "ExpressionStatement", "src": "8903:49:75" }, { "expression": { "id": 21219, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 21217, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20848, "src": "8963:12:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 21218, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21195, "src": "8979:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8963:22:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 21220, "nodeType": "ExpressionStatement", "src": "8963:22:75" }, { "expression": { "id": 21225, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 21221, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20840, "src": "8995:9:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 21223, "indexExpression": { "id": 21222, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21193, "src": "9005:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8995:18:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 21224, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21195, "src": "9017:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8995:28:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 21226, "nodeType": "ExpressionStatement", "src": "8995:28:75" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 21230, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9055:1:75", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 21229, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9047:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21228, "name": "address", "nodeType": "ElementaryTypeName", "src": "9047:7:75", "typeDescriptions": {} } }, "id": 21231, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9047:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21232, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21193, "src": "9059:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21233, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21195, "src": "9068:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21227, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 27177, "src": "9038:8:75", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21234, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9038:37:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21235, "nodeType": "EmitStatement", "src": "9033:42:75" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 21239, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9114:1:75", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 21238, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9106:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21237, "name": "address", "nodeType": "ElementaryTypeName", "src": "9106:7:75", "typeDescriptions": {} } }, "id": 21240, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9106:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21241, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21193, "src": "9118:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21242, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21195, "src": "9127:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21236, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21428, "src": "9086:19:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21243, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9086:48:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21244, "nodeType": "ExpressionStatement", "src": "9086:48:75" } ] }, "documentation": { "id": 21191, "nodeType": "StructuredDocumentation", "src": "8482:265:75", "text": "@dev Creates `amount` tokens and assigns them to `account`, increasing\n the total supply.\n Emits a {Transfer} event with `from` set to the zero address.\n Requirements:\n - `account` cannot be the zero address." }, "id": 21246, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nameLocation": "8761:5:75", "nodeType": "FunctionDefinition", "parameters": { "id": 21196, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21193, "mutability": "mutable", "name": "account", "nameLocation": "8775:7:75", "nodeType": "VariableDeclaration", "scope": 21246, "src": "8767:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21192, "name": "address", "nodeType": "ElementaryTypeName", "src": "8767:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21195, "mutability": "mutable", "name": "amount", "nameLocation": "8792:6:75", "nodeType": "VariableDeclaration", "scope": 21246, "src": "8784:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21194, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8784:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8766:33:75" }, "returnParameters": { "id": 21197, "nodeType": "ParameterList", "parameters": [], "src": "8817:0:75" }, "scope": 21434, "src": "8752:389:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 21317, "nodeType": "Block", "src": "9526:511:75", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 21260, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21255, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21249, "src": "9544:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 21258, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9563:1:75", "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": 21257, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9555:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21256, "name": "address", "nodeType": "ElementaryTypeName", "src": "9555:7:75", "typeDescriptions": {} } }, "id": 21259, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9555:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9544:21:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e2066726f6d20746865207a65726f2061646472657373", "id": 21261, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9567:35:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" }, "value": "ERC20: burn from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" } ], "id": 21254, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "9536:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21262, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9536:67:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21263, "nodeType": "ExpressionStatement", "src": "9536:67:75" }, { "expression": { "arguments": [ { "id": 21265, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21249, "src": "9635:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 21268, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9652:1:75", "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": 21267, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9644:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21266, "name": "address", "nodeType": "ElementaryTypeName", "src": "9644:7:75", "typeDescriptions": {} } }, "id": 21269, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9644:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21270, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21251, "src": "9656:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21264, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21417, "src": "9614:20:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21271, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9614:49:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21272, "nodeType": "ExpressionStatement", "src": "9614:49:75" }, { "assignments": [ 21274 ], "declarations": [ { "constant": false, "id": 21274, "mutability": "mutable", "name": "accountBalance", "nameLocation": "9682:14:75", "nodeType": "VariableDeclaration", "scope": 21317, "src": "9674:22:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21273, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9674:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 21278, "initialValue": { "baseExpression": { "id": 21275, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20840, "src": "9699:9:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 21277, "indexExpression": { "id": 21276, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21249, "src": "9709:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9699:18:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "9674:43:75" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21282, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21280, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21274, "src": "9735:14:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 21281, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21251, "src": "9753:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9735:24:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e20616d6f756e7420657863656564732062616c616e6365", "id": 21283, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9761:36:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" }, "value": "ERC20: burn amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" } ], "id": 21279, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "9727:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21284, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9727:71:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21285, "nodeType": "ExpressionStatement", "src": "9727:71:75" }, { "id": 21294, "nodeType": "UncheckedBlock", "src": "9808:79:75", "statements": [ { "expression": { "id": 21292, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 21286, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20840, "src": "9832:9:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 21288, "indexExpression": { "id": 21287, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21249, "src": "9842:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9832:18:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21291, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21289, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21274, "src": "9853:14:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 21290, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21251, "src": "9870:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9853:23:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9832:44:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 21293, "nodeType": "ExpressionStatement", "src": "9832:44:75" } ] }, { "expression": { "id": 21297, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 21295, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20848, "src": "9896:12:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "id": 21296, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21251, "src": "9912:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9896:22:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 21298, "nodeType": "ExpressionStatement", "src": "9896:22:75" }, { "eventCall": { "arguments": [ { "id": 21300, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21249, "src": "9943:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 21303, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9960:1:75", "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": 21302, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9952:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21301, "name": "address", "nodeType": "ElementaryTypeName", "src": "9952:7:75", "typeDescriptions": {} } }, "id": 21304, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9952:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21305, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21251, "src": "9964:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21299, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 27177, "src": "9934:8:75", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21306, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9934:37:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21307, "nodeType": "EmitStatement", "src": "9929:42:75" }, { "expression": { "arguments": [ { "id": 21309, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21249, "src": "10002:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 21312, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10019:1:75", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 21311, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10011:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21310, "name": "address", "nodeType": "ElementaryTypeName", "src": "10011:7:75", "typeDescriptions": {} } }, "id": 21313, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10011:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21314, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21251, "src": "10023:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21308, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21428, "src": "9982:19:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21315, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9982:48:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21316, "nodeType": "ExpressionStatement", "src": "9982:48:75" } ] }, "documentation": { "id": 21247, "nodeType": "StructuredDocumentation", "src": "9147:309:75", "text": " @dev Destroys `amount` tokens from `account`, reducing the\n total supply.\n Emits a {Transfer} event with `to` set to the zero address.\n Requirements:\n - `account` cannot be the zero address.\n - `account` must have at least `amount` tokens." }, "id": 21318, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nameLocation": "9470:5:75", "nodeType": "FunctionDefinition", "parameters": { "id": 21252, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21249, "mutability": "mutable", "name": "account", "nameLocation": "9484:7:75", "nodeType": "VariableDeclaration", "scope": 21318, "src": "9476:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21248, "name": "address", "nodeType": "ElementaryTypeName", "src": "9476:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21251, "mutability": "mutable", "name": "amount", "nameLocation": "9501:6:75", "nodeType": "VariableDeclaration", "scope": 21318, "src": "9493:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21250, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9493:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9475:33:75" }, "returnParameters": { "id": 21253, "nodeType": "ParameterList", "parameters": [], "src": "9526:0:75" }, "scope": 21434, "src": "9461:576:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 21362, "nodeType": "Block", "src": "10573:257:75", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 21334, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21329, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21321, "src": "10591:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 21332, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10608:1:75", "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": 21331, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10600:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21330, "name": "address", "nodeType": "ElementaryTypeName", "src": "10600:7:75", "typeDescriptions": {} } }, "id": 21333, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10600:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10591:19:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 21335, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10612:38:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" }, "value": "ERC20: approve from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" } ], "id": 21328, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "10583:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21336, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10583:68:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21337, "nodeType": "ExpressionStatement", "src": "10583:68:75" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 21344, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21339, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21323, "src": "10669:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 21342, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10688:1:75", "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": 21341, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10680:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 21340, "name": "address", "nodeType": "ElementaryTypeName", "src": "10680:7:75", "typeDescriptions": {} } }, "id": 21343, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10680:10:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10669:21:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 21345, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10692:36:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 21338, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "10661:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21346, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10661:68:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21347, "nodeType": "ExpressionStatement", "src": "10661:68:75" }, { "expression": { "id": 21354, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 21348, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20846, "src": "10740:11:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 21351, "indexExpression": { "id": 21349, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21321, "src": "10752:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10740:18:75", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 21352, "indexExpression": { "id": 21350, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21323, "src": "10759:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10740:27:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 21353, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21325, "src": "10770:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10740:36:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 21355, "nodeType": "ExpressionStatement", "src": "10740:36:75" }, { "eventCall": { "arguments": [ { "id": 21357, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21321, "src": "10800:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21358, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21323, "src": "10807:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21359, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21325, "src": "10816:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21356, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 27186, "src": "10791:8:75", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21360, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10791:32:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21361, "nodeType": "EmitStatement", "src": "10786:37:75" } ] }, "documentation": { "id": 21319, "nodeType": "StructuredDocumentation", "src": "10043:412:75", "text": " @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n This internal function is equivalent to `approve`, and can be used to\n e.g. set automatic allowances for certain subsystems, etc.\n Emits an {Approval} event.\n Requirements:\n - `owner` cannot be the zero address.\n - `spender` cannot be the zero address." }, "id": 21363, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nameLocation": "10469:8:75", "nodeType": "FunctionDefinition", "parameters": { "id": 21326, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21321, "mutability": "mutable", "name": "owner", "nameLocation": "10495:5:75", "nodeType": "VariableDeclaration", "scope": 21363, "src": "10487:13:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21320, "name": "address", "nodeType": "ElementaryTypeName", "src": "10487:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21323, "mutability": "mutable", "name": "spender", "nameLocation": "10518:7:75", "nodeType": "VariableDeclaration", "scope": 21363, "src": "10510:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21322, "name": "address", "nodeType": "ElementaryTypeName", "src": "10510:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21325, "mutability": "mutable", "name": "amount", "nameLocation": "10543:6:75", "nodeType": "VariableDeclaration", "scope": 21363, "src": "10535:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21324, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10535:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10477:78:75" }, "returnParameters": { "id": 21327, "nodeType": "ParameterList", "parameters": [], "src": "10573:0:75" }, "scope": 21434, "src": "10460:370:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 21405, "nodeType": "Block", "src": "11227:321:75", "statements": [ { "assignments": [ 21374 ], "declarations": [ { "constant": false, "id": 21374, "mutability": "mutable", "name": "currentAllowance", "nameLocation": "11245:16:75", "nodeType": "VariableDeclaration", "scope": 21405, "src": "11237:24:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21373, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11237:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 21379, "initialValue": { "arguments": [ { "id": 21376, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21366, "src": "11274:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21377, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21368, "src": "11281:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 21375, "name": "allowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20983, "src": "11264:9:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view returns (uint256)" } }, "id": 21378, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11264:25:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "11237:52:75" }, { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21386, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21380, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21374, "src": "11303:16:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "expression": { "arguments": [ { "id": 21383, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11328:7:75", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" }, "typeName": { "id": 21382, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11328:7:75", "typeDescriptions": {} } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" } ], "id": 21381, "name": "type", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -27, "src": "11323:4:75", "typeDescriptions": { "typeIdentifier": "t_function_metatype_pure$__$returns$__$", "typeString": "function () pure" } }, "id": 21384, "isConstant": false, "isLValue": false, "isPure": true, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11323:13:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_magic_meta_type_t_uint256", "typeString": "type(uint256)" } }, "id": 21385, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "max", "nodeType": "MemberAccess", "src": "11323:17:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11303:37:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 21404, "nodeType": "IfStatement", "src": "11299:243:75", "trueBody": { "id": 21403, "nodeType": "Block", "src": "11342:200:75", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21390, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21388, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21374, "src": "11364:16:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 21389, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21370, "src": "11384:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11364:26:75", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20696e73756666696369656e7420616c6c6f77616e6365", "id": 21391, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11392:31:75", "typeDescriptions": { "typeIdentifier": "t_stringliteral_3b6607e091cba9325f958656d2b5e0622ab7dc0eac71a26ac788cb25bc19f4fe", "typeString": "literal_string \"ERC20: insufficient allowance\"" }, "value": "ERC20: insufficient allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_3b6607e091cba9325f958656d2b5e0622ab7dc0eac71a26ac788cb25bc19f4fe", "typeString": "literal_string \"ERC20: insufficient allowance\"" } ], "id": 21387, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "11356:7:75", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 21392, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11356:68:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21393, "nodeType": "ExpressionStatement", "src": "11356:68:75" }, { "id": 21402, "nodeType": "UncheckedBlock", "src": "11438:94:75", "statements": [ { "expression": { "arguments": [ { "id": 21395, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21366, "src": "11475:5:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 21396, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21368, "src": "11482:7:75", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 21399, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 21397, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21374, "src": "11491:16:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 21398, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21370, "src": "11510:6:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11491:25:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 21394, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21363, "src": "11466:8:75", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 21400, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11466:51:75", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 21401, "nodeType": "ExpressionStatement", "src": "11466:51:75" } ] } ] } } ] }, "documentation": { "id": 21364, "nodeType": "StructuredDocumentation", "src": "10836:266:75", "text": " @dev Spend `amount` form the allowance of `owner` toward `spender`.\n Does not update the allowance amount in case of infinite allowance.\n Revert if not enough allowance is available.\n Might emit an {Approval} event." }, "id": 21406, "implemented": true, "kind": "function", "modifiers": [], "name": "_spendAllowance", "nameLocation": "11116:15:75", "nodeType": "FunctionDefinition", "parameters": { "id": 21371, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21366, "mutability": "mutable", "name": "owner", "nameLocation": "11149:5:75", "nodeType": "VariableDeclaration", "scope": 21406, "src": "11141:13:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21365, "name": "address", "nodeType": "ElementaryTypeName", "src": "11141:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21368, "mutability": "mutable", "name": "spender", "nameLocation": "11172:7:75", "nodeType": "VariableDeclaration", "scope": 21406, "src": "11164:15:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21367, "name": "address", "nodeType": "ElementaryTypeName", "src": "11164:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21370, "mutability": "mutable", "name": "amount", "nameLocation": "11197:6:75", "nodeType": "VariableDeclaration", "scope": 21406, "src": "11189:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21369, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11189:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11131:78:75" }, "returnParameters": { "id": 21372, "nodeType": "ParameterList", "parameters": [], "src": "11227:0:75" }, "scope": 21434, "src": "11107:441:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 21416, "nodeType": "Block", "src": "12251:2:75", "statements": [] }, "documentation": { "id": 21407, "nodeType": "StructuredDocumentation", "src": "11554:573:75", "text": " @dev Hook that is called before any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n will be transferred to `to`.\n - when `from` is zero, `amount` tokens will be minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens 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": 21417, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nameLocation": "12141:20:75", "nodeType": "FunctionDefinition", "parameters": { "id": 21414, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21409, "mutability": "mutable", "name": "from", "nameLocation": "12179:4:75", "nodeType": "VariableDeclaration", "scope": 21417, "src": "12171:12:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21408, "name": "address", "nodeType": "ElementaryTypeName", "src": "12171:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21411, "mutability": "mutable", "name": "to", "nameLocation": "12201:2:75", "nodeType": "VariableDeclaration", "scope": 21417, "src": "12193:10:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21410, "name": "address", "nodeType": "ElementaryTypeName", "src": "12193:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21413, "mutability": "mutable", "name": "amount", "nameLocation": "12221:6:75", "nodeType": "VariableDeclaration", "scope": 21417, "src": "12213:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21412, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12213:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "12161:72:75" }, "returnParameters": { "id": 21415, "nodeType": "ParameterList", "parameters": [], "src": "12251:0:75" }, "scope": 21434, "src": "12132:121:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 21427, "nodeType": "Block", "src": "12959:2:75", "statements": [] }, "documentation": { "id": 21418, "nodeType": "StructuredDocumentation", "src": "12259:577:75", "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, `amount` of ``from``'s tokens\n has been transferred to `to`.\n - when `from` is zero, `amount` tokens have been minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens have been 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": 21428, "implemented": true, "kind": "function", "modifiers": [], "name": "_afterTokenTransfer", "nameLocation": "12850:19:75", "nodeType": "FunctionDefinition", "parameters": { "id": 21425, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21420, "mutability": "mutable", "name": "from", "nameLocation": "12887:4:75", "nodeType": "VariableDeclaration", "scope": 21428, "src": "12879:12:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21419, "name": "address", "nodeType": "ElementaryTypeName", "src": "12879:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21422, "mutability": "mutable", "name": "to", "nameLocation": "12909:2:75", "nodeType": "VariableDeclaration", "scope": 21428, "src": "12901:10:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 21421, "name": "address", "nodeType": "ElementaryTypeName", "src": "12901:7:75", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 21424, "mutability": "mutable", "name": "amount", "nameLocation": "12929:6:75", "nodeType": "VariableDeclaration", "scope": 21428, "src": "12921:14:75", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 21423, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12921:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "12869:72:75" }, "returnParameters": { "id": 21426, "nodeType": "ParameterList", "parameters": [], "src": "12959:0:75" }, "scope": 21434, "src": "12841:120:75", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "constant": false, "documentation": { "id": 21429, "nodeType": "StructuredDocumentation", "src": "12967:254:75", "text": " @dev This empty reserved space is put in place to allow future versions to add new\n variables without shifting down storage in the inheritance chain.\n See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps" }, "id": 21433, "mutability": "mutable", "name": "__gap", "nameLocation": "13246:5:75", "nodeType": "VariableDeclaration", "scope": 21434, "src": "13226:25:75", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_array$_t_uint256_$45_storage", "typeString": "uint256[45]" }, "typeName": { "baseType": { "id": 21430, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13226:7:75", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 21432, "length": { "hexValue": "3435", "id": 21431, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "13234:2:75", "typeDescriptions": { "typeIdentifier": "t_rational_45_by_1", "typeString": "int_const 45" }, "value": "45" }, "nodeType": "ArrayTypeName", "src": "13226:11:75", "typeDescriptions": { "typeIdentifier": "t_array$_t_uint256_$45_storage_ptr", "typeString": "uint256[45]" } }, "visibility": "private" } ], "scope": 21435, "src": 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"language": "Solidity", "natspec": { "details": "Implementation of the {IERC20} interface. This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20PresetMinterPauser}. TIP: For a detailed writeup see our guide https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How to implement supply mechanisms]. We have followed general OpenZeppelin Contracts guidelines: functions revert instead returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}.", "kind": "dev", "methods": { "allowance(address,address)": { "details": "See {IERC20-allowance}." }, "approve(address,uint256)": { "details": "See {IERC20-approve}. NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on `transferFrom`. This is semantically equivalent to an infinite approval. Requirements: - `spender` cannot be the zero address." }, "balanceOf(address)": { "details": "See {IERC20-balanceOf}." }, "decimals()": { "details": "Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5.05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless this function is overridden; NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}." }, "decreaseAllowance(address,uint256)": { "details": "Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`." }, "increaseAllowance(address,uint256)": { "details": "Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address." }, "name()": { "details": "Returns the name of the token." }, "symbol()": { "details": "Returns the symbol of the token, usually a shorter version of the name." }, "totalSupply()": { "details": "See {IERC20-totalSupply}." }, "transfer(address,uint256)": { "details": "See {IERC20-transfer}. Requirements: - `to` cannot be the zero address. - the caller must have a balance of at least `amount`." }, "transferFrom(address,address,uint256)": { "details": "See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}. NOTE: Does not update the allowance if the current allowance is the maximum `uint256`. Requirements: - `from` and `to` cannot be the zero address. - `from` must have a balance of at least `amount`. - the caller must have allowance for ``from``'s tokens of at least `amount`." } }, "stateVariables": { "__gap": { "details": "This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain. See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps" } }, "version": 1 }, "offset": [ 1482, 13254 ], "opcodes": "PUSH1 0x80 PUSH1 0x40 MSTORE CALLVALUE DUP1 ISZERO PUSH2 0x10 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH1 0x4 CALLDATASIZE LT PUSH2 0xA9 JUMPI PUSH1 0x0 CALLDATALOAD PUSH1 0xE0 SHR DUP1 PUSH4 0x39509351 GT PUSH2 0x71 JUMPI DUP1 PUSH4 0x39509351 EQ PUSH2 0x123 JUMPI DUP1 PUSH4 0x70A08231 EQ PUSH2 0x136 JUMPI DUP1 PUSH4 0x95D89B41 EQ PUSH2 0x15F JUMPI DUP1 PUSH4 0xA457C2D7 EQ PUSH2 0x167 JUMPI DUP1 PUSH4 0xA9059CBB EQ PUSH2 0x17A JUMPI DUP1 PUSH4 0xDD62ED3E EQ PUSH2 0x18D JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP1 PUSH4 0x6FDDE03 EQ PUSH2 0xAE JUMPI DUP1 PUSH4 0x95EA7B3 EQ PUSH2 0xCC JUMPI DUP1 PUSH4 0x18160DDD EQ PUSH2 0xEF JUMPI DUP1 PUSH4 0x23B872DD EQ PUSH2 0x101 JUMPI DUP1 PUSH4 0x313CE567 EQ PUSH2 0x114 JUMPI JUMPDEST PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xB6 PUSH2 0x1C6 JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH2 0xC3 SWAP2 SWAP1 PUSH2 0x7E2 JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 RETURN JUMPDEST PUSH2 0xDF PUSH2 0xDA CALLDATASIZE PUSH1 0x4 PUSH2 0x7B8 JUMP JUMPDEST PUSH2 0x258 JUMP JUMPDEST PUSH1 0x40 MLOAD SWAP1 ISZERO ISZERO DUP2 MSTORE PUSH1 0x20 ADD PUSH2 0xC3 JUMP JUMPDEST PUSH1 0x35 SLOAD JUMPDEST PUSH1 0x40 MLOAD SWAP1 DUP2 MSTORE PUSH1 0x20 ADD PUSH2 0xC3 JUMP JUMPDEST PUSH2 0xDF PUSH2 0x10F CALLDATASIZE PUSH1 0x4 PUSH2 0x77C JUMP JUMPDEST PUSH2 0x270 JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH1 0x12 DUP2 MSTORE PUSH1 0x20 ADD PUSH2 0xC3 JUMP JUMPDEST PUSH2 0xDF PUSH2 0x131 CALLDATASIZE PUSH1 0x4 PUSH2 0x7B8 JUMP JUMPDEST PUSH2 0x294 JUMP JUMPDEST PUSH2 0xF3 PUSH2 0x144 CALLDATASIZE PUSH1 0x4 PUSH2 0x727 JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB AND PUSH1 0x0 SWAP1 DUP2 MSTORE PUSH1 0x33 PUSH1 0x20 MSTORE PUSH1 0x40 SWAP1 KECCAK256 SLOAD SWAP1 JUMP JUMPDEST PUSH2 0xB6 PUSH2 0x2D3 JUMP JUMPDEST PUSH2 0xDF PUSH2 0x175 CALLDATASIZE PUSH1 0x4 PUSH2 0x7B8 JUMP JUMPDEST PUSH2 0x2E2 JUMP JUMPDEST PUSH2 0xDF PUSH2 0x188 CALLDATASIZE PUSH1 0x4 PUSH2 0x7B8 JUMP JUMPDEST PUSH2 0x379 JUMP JUMPDEST PUSH2 0xF3 PUSH2 0x19B CALLDATASIZE PUSH1 0x4 PUSH2 0x749 JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB SWAP2 DUP3 AND PUSH1 0x0 SWAP1 DUP2 MSTORE PUSH1 0x34 PUSH1 0x20 SWAP1 DUP2 MSTORE PUSH1 0x40 DUP1 DUP4 KECCAK256 SWAP4 SWAP1 SWAP5 AND DUP3 MSTORE SWAP2 SWAP1 SWAP2 MSTORE KECCAK256 SLOAD SWAP1 JUMP JUMPDEST PUSH1 0x60 PUSH1 0x36 DUP1 SLOAD PUSH2 0x1D5 SWAP1 PUSH2 0x85D JUMP JUMPDEST DUP1 PUSH1 0x1F ADD PUSH1 0x20 DUP1 SWAP2 DIV MUL PUSH1 0x20 ADD PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 SWAP3 SWAP2 SWAP1 DUP2 DUP2 MSTORE PUSH1 0x20 ADD DUP3 DUP1 SLOAD PUSH2 0x201 SWAP1 PUSH2 0x85D JUMP JUMPDEST DUP1 ISZERO PUSH2 0x24E JUMPI DUP1 PUSH1 0x1F LT PUSH2 0x223 JUMPI PUSH2 0x100 DUP1 DUP4 SLOAD DIV MUL DUP4 MSTORE SWAP2 PUSH1 0x20 ADD SWAP2 PUSH2 0x24E JUMP JUMPDEST DUP3 ADD SWAP2 SWAP1 PUSH1 0x0 MSTORE PUSH1 0x20 PUSH1 0x0 KECCAK256 SWAP1 JUMPDEST DUP2 SLOAD DUP2 MSTORE SWAP1 PUSH1 0x1 ADD SWAP1 PUSH1 0x20 ADD DUP1 DUP4 GT PUSH2 0x231 JUMPI DUP3 SWAP1 SUB PUSH1 0x1F AND DUP3 ADD SWAP2 JUMPDEST POP POP POP POP POP SWAP1 POP SWAP1 JUMP JUMPDEST PUSH1 0x0 CALLER PUSH2 0x266 DUP2 DUP6 DUP6 PUSH2 0x387 JUMP JUMPDEST POP PUSH1 0x1 SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 CALLER PUSH2 0x27E DUP6 DUP3 DUP6 PUSH2 0x4AB JUMP JUMPDEST PUSH2 0x289 DUP6 DUP6 DUP6 PUSH2 0x53D JUMP JUMPDEST POP PUSH1 0x1 SWAP5 SWAP4 POP POP POP POP JUMP JUMPDEST CALLER PUSH1 0x0 DUP2 DUP2 MSTORE PUSH1 0x34 PUSH1 0x20 SWAP1 DUP2 MSTORE PUSH1 0x40 DUP1 DUP4 KECCAK256 PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP8 AND DUP5 MSTORE SWAP1 SWAP2 MSTORE DUP2 KECCAK256 SLOAD SWAP1 SWAP2 SWAP1 PUSH2 0x266 SWAP1 DUP3 SWAP1 DUP7 SWAP1 PUSH2 0x2CE SWAP1 DUP8 SWAP1 PUSH2 0x837 JUMP JUMPDEST PUSH2 0x387 JUMP JUMPDEST PUSH1 0x60 PUSH1 0x37 DUP1 SLOAD PUSH2 0x1D5 SWAP1 PUSH2 0x85D JUMP JUMPDEST CALLER PUSH1 0x0 DUP2 DUP2 MSTORE PUSH1 0x34 PUSH1 0x20 SWAP1 DUP2 MSTORE PUSH1 0x40 DUP1 DUP4 KECCAK256 PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP8 AND DUP5 MSTORE SWAP1 SWAP2 MSTORE DUP2 KECCAK256 SLOAD SWAP1 SWAP2 SWAP1 DUP4 DUP2 LT ISZERO PUSH2 0x36C JUMPI PUSH1 0x40 MLOAD PUSH3 0x461BCD PUSH1 0xE5 SHL DUP2 MSTORE PUSH1 0x20 PUSH1 0x4 DUP3 ADD MSTORE PUSH1 0x25 PUSH1 0x24 DUP3 ADD MSTORE PUSH32 0x45524332303A2064656372656173656420616C6C6F77616E63652062656C6F77 PUSH1 0x44 DUP3 ADD MSTORE PUSH5 0x207A65726F PUSH1 0xD8 SHL PUSH1 0x64 DUP3 ADD MSTORE PUSH1 0x84 ADD JUMPDEST PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 REVERT JUMPDEST PUSH2 0x289 DUP3 DUP7 DUP7 DUP5 SUB PUSH2 0x387 JUMP JUMPDEST PUSH1 0x0 CALLER PUSH2 0x266 DUP2 DUP6 DUP6 PUSH2 0x53D JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP4 AND PUSH2 0x3E9 JUMPI PUSH1 0x40 MLOAD PUSH3 0x461BCD PUSH1 0xE5 SHL DUP2 MSTORE PUSH1 0x20 PUSH1 0x4 DUP3 ADD MSTORE PUSH1 0x24 DUP1 DUP3 ADD MSTORE PUSH32 0x45524332303A20617070726F76652066726F6D20746865207A65726F20616464 PUSH1 0x44 DUP3 ADD MSTORE PUSH4 0x72657373 PUSH1 0xE0 SHL PUSH1 0x64 DUP3 ADD MSTORE PUSH1 0x84 ADD PUSH2 0x363 JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP3 AND PUSH2 0x44A JUMPI PUSH1 0x40 MLOAD PUSH3 0x461BCD PUSH1 0xE5 SHL DUP2 MSTORE PUSH1 0x20 PUSH1 0x4 DUP3 ADD MSTORE PUSH1 0x22 PUSH1 0x24 DUP3 ADD MSTORE PUSH32 0x45524332303A20617070726F766520746F20746865207A65726F206164647265 PUSH1 0x44 DUP3 ADD MSTORE PUSH2 0x7373 PUSH1 0xF0 SHL PUSH1 0x64 DUP3 ADD MSTORE PUSH1 0x84 ADD PUSH2 0x363 JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP4 DUP2 AND PUSH1 0x0 DUP2 DUP2 MSTORE PUSH1 0x34 PUSH1 0x20 SWAP1 DUP2 MSTORE PUSH1 0x40 DUP1 DUP4 KECCAK256 SWAP5 DUP8 AND DUP1 DUP5 MSTORE SWAP5 DUP3 MSTORE SWAP2 DUP3 SWAP1 KECCAK256 DUP6 SWAP1 SSTORE SWAP1 MLOAD DUP5 DUP2 MSTORE PUSH32 0x8C5BE1E5EBEC7D5BD14F71427D1E84F3DD0314C0F7B2291E5B200AC8C7C3B925 SWAP2 ADD PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 LOG3 POP POP POP JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP4 DUP2 AND PUSH1 0x0 SWAP1 DUP2 MSTORE PUSH1 0x34 PUSH1 0x20 SWAP1 DUP2 MSTORE PUSH1 0x40 DUP1 DUP4 KECCAK256 SWAP4 DUP7 AND DUP4 MSTORE SWAP3 SWAP1 MSTORE KECCAK256 SLOAD PUSH1 0x0 NOT DUP2 EQ PUSH2 0x537 JUMPI DUP2 DUP2 LT ISZERO PUSH2 0x52A JUMPI PUSH1 0x40 MLOAD PUSH3 0x461BCD PUSH1 0xE5 SHL DUP2 MSTORE PUSH1 0x20 PUSH1 0x4 DUP3 ADD MSTORE PUSH1 0x1D PUSH1 0x24 DUP3 ADD MSTORE PUSH32 0x45524332303A20696E73756666696369656E7420616C6C6F77616E6365000000 PUSH1 0x44 DUP3 ADD MSTORE PUSH1 0x64 ADD PUSH2 0x363 JUMP JUMPDEST PUSH2 0x537 DUP5 DUP5 DUP5 DUP5 SUB PUSH2 0x387 JUMP JUMPDEST POP POP POP POP JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP4 AND PUSH2 0x5A1 JUMPI PUSH1 0x40 MLOAD PUSH3 0x461BCD PUSH1 0xE5 SHL DUP2 MSTORE PUSH1 0x20 PUSH1 0x4 DUP3 ADD MSTORE PUSH1 0x25 PUSH1 0x24 DUP3 ADD MSTORE PUSH32 0x45524332303A207472616E736665722066726F6D20746865207A65726F206164 PUSH1 0x44 DUP3 ADD MSTORE PUSH5 0x6472657373 PUSH1 0xD8 SHL PUSH1 0x64 DUP3 ADD MSTORE PUSH1 0x84 ADD PUSH2 0x363 JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP3 AND PUSH2 0x603 JUMPI PUSH1 0x40 MLOAD PUSH3 0x461BCD PUSH1 0xE5 SHL DUP2 MSTORE PUSH1 0x20 PUSH1 0x4 DUP3 ADD MSTORE PUSH1 0x23 PUSH1 0x24 DUP3 ADD MSTORE PUSH32 0x45524332303A207472616E7366657220746F20746865207A65726F2061646472 PUSH1 0x44 DUP3 ADD MSTORE PUSH3 0x657373 PUSH1 0xE8 SHL PUSH1 0x64 DUP3 ADD MSTORE PUSH1 0x84 ADD PUSH2 0x363 JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP4 AND PUSH1 0x0 SWAP1 DUP2 MSTORE PUSH1 0x33 PUSH1 0x20 MSTORE PUSH1 0x40 SWAP1 KECCAK256 SLOAD DUP2 DUP2 LT ISZERO PUSH2 0x67B JUMPI PUSH1 0x40 MLOAD PUSH3 0x461BCD PUSH1 0xE5 SHL DUP2 MSTORE PUSH1 0x20 PUSH1 0x4 DUP3 ADD MSTORE PUSH1 0x26 PUSH1 0x24 DUP3 ADD MSTORE PUSH32 0x45524332303A207472616E7366657220616D6F756E7420657863656564732062 PUSH1 0x44 DUP3 ADD MSTORE PUSH6 0x616C616E6365 PUSH1 0xD0 SHL PUSH1 0x64 DUP3 ADD MSTORE PUSH1 0x84 ADD PUSH2 0x363 JUMP JUMPDEST PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP1 DUP6 AND PUSH1 0x0 SWAP1 DUP2 MSTORE PUSH1 0x33 PUSH1 0x20 MSTORE PUSH1 0x40 DUP1 DUP3 KECCAK256 DUP6 DUP6 SUB SWAP1 SSTORE SWAP2 DUP6 AND DUP2 MSTORE SWAP1 DUP2 KECCAK256 DUP1 SLOAD DUP5 SWAP3 SWAP1 PUSH2 0x6B2 SWAP1 DUP5 SWAP1 PUSH2 0x837 JUMP JUMPDEST SWAP3 POP POP DUP2 SWAP1 SSTORE POP DUP3 PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB AND DUP5 PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB AND PUSH32 0xDDF252AD1BE2C89B69C2B068FC378DAA952BA7F163C4A11628F55A4DF523B3EF DUP5 PUSH1 0x40 MLOAD PUSH2 0x6FE SWAP2 DUP2 MSTORE PUSH1 0x20 ADD SWAP1 JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 LOG3 PUSH2 0x537 JUMP JUMPDEST DUP1 CALLDATALOAD PUSH1 0x1 PUSH1 0x1 PUSH1 0xA0 SHL SUB DUP2 AND DUP2 EQ PUSH2 0x722 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST SWAP2 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 PUSH1 0x20 DUP3 DUP5 SUB SLT ISZERO PUSH2 0x739 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x742 DUP3 PUSH2 0x70B JUMP JUMPDEST SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x40 DUP4 DUP6 SUB SLT ISZERO PUSH2 0x75C JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x765 DUP4 PUSH2 0x70B JUMP JUMPDEST SWAP2 POP PUSH2 0x773 PUSH1 0x20 DUP5 ADD PUSH2 0x70B JUMP JUMPDEST SWAP1 POP SWAP3 POP SWAP3 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x0 PUSH1 0x60 DUP5 DUP7 SUB SLT ISZERO PUSH2 0x791 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x79A DUP5 PUSH2 0x70B JUMP JUMPDEST SWAP3 POP PUSH2 0x7A8 PUSH1 0x20 DUP6 ADD PUSH2 0x70B JUMP JUMPDEST SWAP2 POP PUSH1 0x40 DUP5 ADD CALLDATALOAD SWAP1 POP SWAP3 POP SWAP3 POP SWAP3 JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x40 DUP4 DUP6 SUB SLT ISZERO PUSH2 0x7CB JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x7D4 DUP4 PUSH2 0x70B JUMP JUMPDEST SWAP5 PUSH1 0x20 SWAP4 SWAP1 SWAP4 ADD CALLDATALOAD SWAP4 POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH1 0x20 DUP1 DUP4 MSTORE DUP4 MLOAD DUP1 DUP3 DUP6 ADD MSTORE PUSH1 0x0 JUMPDEST DUP2 DUP2 LT ISZERO PUSH2 0x80F JUMPI DUP6 DUP2 ADD DUP4 ADD MLOAD DUP6 DUP3 ADD PUSH1 0x40 ADD MSTORE DUP3 ADD PUSH2 0x7F3 JUMP JUMPDEST DUP2 DUP2 GT ISZERO PUSH2 0x821 JUMPI PUSH1 0x0 PUSH1 0x40 DUP4 DUP8 ADD ADD MSTORE JUMPDEST POP PUSH1 0x1F ADD PUSH1 0x1F NOT AND SWAP3 SWAP1 SWAP3 ADD PUSH1 0x40 ADD SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP3 NOT DUP3 GT ISZERO PUSH2 0x858 JUMPI PUSH4 0x4E487B71 PUSH1 0xE0 SHL PUSH1 0x0 MSTORE PUSH1 0x11 PUSH1 0x4 MSTORE PUSH1 0x24 PUSH1 0x0 REVERT JUMPDEST POP ADD SWAP1 JUMP JUMPDEST PUSH1 0x1 DUP2 DUP2 SHR SWAP1 DUP3 AND DUP1 PUSH2 0x871 JUMPI PUSH1 0x7F DUP3 AND SWAP2 POP JUMPDEST PUSH1 0x20 DUP3 LT DUP2 EQ ISZERO PUSH2 0x892 JUMPI PUSH4 0x4E487B71 PUSH1 0xE0 SHL PUSH1 0x0 MSTORE PUSH1 0x22 PUSH1 0x4 MSTORE PUSH1 0x24 PUSH1 0x0 REVERT JUMPDEST POP SWAP2 SWAP1 POP JUMP INVALID LOG2 PUSH5 0x6970667358 0x22 SLT KECCAK256 EXTCODEHASH DUP16 JUMP SWAP7 0xB1 0x1E 0xCE 0xE5 CREATE2 EXTCODEHASH 0xEC 0xE9 CALLDATACOPY 0xEF PUSH28 0x27DBB74F1732F5E2E61F75D669BD216FD764736F6C63430008060033 ", "pcMap": { "0": { "offset": [ 1482, 13254 ], "op": "PUSH1", "path": "75", "value": "0x80" }, "2": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH1", "path": "75", "value": "0x40" }, "4": { "fn": null, "offset": [ 1482, 13254 ], "op": "MSTORE", "path": "75" }, "5": { "fn": null, "offset": [ 1482, 13254 ], "op": "CALLVALUE", "path": "75" }, "6": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "7": { "fn": null, "offset": [ 1482, 13254 ], "op": "ISZERO", "path": "75" }, "8": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH2", "path": "75", "value": "0x10" }, "11": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPI", "path": "75" }, "12": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH1", "path": "75", "value": "0x0" }, "14": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "15": { "dev": "Cannot send ether to nonpayable function", "fn": null, "offset": [ 1482, 13254 ], "op": "REVERT", "path": "75" }, "16": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPDEST", "path": "75" }, "17": { "fn": null, "offset": [ 1482, 13254 ], "op": "POP", "path": "75" }, "18": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH1", "path": "75", "value": "0x4" }, "20": { "fn": null, "offset": [ 1482, 13254 ], "op": "CALLDATASIZE", "path": "75" }, "21": { "fn": null, "offset": [ 1482, 13254 ], "op": "LT", "path": "75" }, "22": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH2", "path": "75", "value": "0xA9" }, "25": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPI", "path": "75" }, "26": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH1", "path": "75", "value": "0x0" }, "28": { "fn": null, "offset": [ 1482, 13254 ], "op": "CALLDATALOAD", "path": "75" }, "29": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH1", "path": "75", "value": "0xE0" }, "31": { "fn": null, "offset": [ 1482, 13254 ], "op": "SHR", "path": "75" }, "32": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "33": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH4", "path": "75", "value": "0x39509351" }, "38": { "fn": null, "offset": [ 1482, 13254 ], "op": "GT", "path": "75" }, "39": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH2", "path": "75", "value": "0x71" }, "42": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPI", "path": "75" }, "43": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "44": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH4", "path": "75", "value": "0x39509351" }, "49": { "fn": null, "offset": [ 1482, 13254 ], "op": "EQ", "path": "75" }, "50": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH2", "path": "75", "value": "0x123" }, "53": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPI", "path": "75" }, "54": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "55": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH4", "path": "75", "value": "0x70A08231" }, "60": { "fn": null, "offset": [ 1482, 13254 ], "op": "EQ", "path": "75" }, "61": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH2", "path": "75", "value": "0x136" }, "64": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPI", "path": "75" }, "65": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "66": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH4", "path": "75", "value": "0x95D89B41" }, "71": { "fn": null, "offset": [ 1482, 13254 ], "op": "EQ", "path": "75" }, "72": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH2", "path": "75", "value": "0x15F" }, "75": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPI", "path": "75" }, "76": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "77": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH4", "path": "75", "value": "0xA457C2D7" }, "82": { "fn": null, "offset": [ 1482, 13254 ], "op": "EQ", "path": "75" }, "83": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH2", "path": "75", "value": "0x167" }, "86": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPI", "path": "75" }, "87": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "88": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH4", "path": "75", "value": "0xA9059CBB" }, "93": { "fn": null, "offset": [ 1482, 13254 ], "op": "EQ", "path": "75" }, "94": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH2", "path": "75", "value": "0x17A" }, "97": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPI", "path": "75" }, "98": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "99": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH4", "path": "75", "value": "0xDD62ED3E" }, "104": { "fn": null, "offset": [ 1482, 13254 ], "op": "EQ", "path": "75" }, "105": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH2", "path": "75", "value": "0x18D" }, "108": { "fn": null, "offset": [ 1482, 13254 ], "op": "JUMPI", "path": "75" }, "109": { "fn": null, "offset": [ 1482, 13254 ], "op": "PUSH1", "path": "75", "value": "0x0" }, "111": { "fn": null, "offset": [ 1482, 13254 ], "op": "DUP1", "path": "75" }, "112": { "fn": null, "offset": [ 1482, 13254 ], "op": "REVERT", "path": "75" }, "113": { "fn": null, "offset": [ 1482, 13254 ], 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"op": "PUSH2", "path": "75", "statement": 28, "value": "0x537" }, "1802": { "fn": "ERC20Upgradeable._beforeTokenTransfer", "offset": [ 12132, 12253 ], "op": "JUMP", "path": "75" }, "1803": { "op": "JUMPDEST" }, "1804": { "op": "DUP1" }, "1805": { "op": "CALLDATALOAD" }, "1806": { "op": "PUSH1", "value": "0x1" }, "1808": { "op": "PUSH1", "value": "0x1" }, "1810": { "op": "PUSH1", "value": "0xA0" }, "1812": { "op": "SHL" }, "1813": { "op": "SUB" }, "1814": { "op": "DUP2" }, "1815": { "op": "AND" }, "1816": { "op": "DUP2" }, "1817": { "op": "EQ" }, "1818": { "op": "PUSH2", "value": "0x722" }, "1821": { "op": "JUMPI" }, "1822": { "op": "PUSH1", "value": "0x0" }, "1824": { "op": "DUP1" }, "1825": { "op": "REVERT" }, "1826": { "op": "JUMPDEST" }, "1827": { "op": "SWAP2" }, "1828": { "op": "SWAP1" }, "1829": { "op": "POP" }, "1830": { "jump": "o", "op": "JUMP" }, "1831": { "op": "JUMPDEST" }, "1832": { "op": "PUSH1", "value": "0x0" }, "1834": { "op": "PUSH1", "value": "0x20" }, "1836": { "op": "DUP3" }, "1837": { "op": "DUP5" }, "1838": { "op": "SUB" }, "1839": { "op": "SLT" }, "1840": { "op": "ISZERO" }, "1841": { "op": "PUSH2", "value": "0x739" }, "1844": { "op": "JUMPI" }, "1845": { "op": "PUSH1", "value": "0x0" }, "1847": { "op": "DUP1" }, "1848": { "op": "REVERT" }, "1849": { "op": "JUMPDEST" }, "1850": { "op": "PUSH2", "value": "0x742" }, "1853": { "op": "DUP3" }, "1854": { "op": "PUSH2", "value": "0x70B" }, "1857": { "jump": "i", "op": "JUMP" }, "1858": { "op": "JUMPDEST" }, "1859": { "op": "SWAP4" }, "1860": { "op": "SWAP3" }, "1861": { "op": "POP" }, "1862": { "op": "POP" }, "1863": { "op": "POP" }, "1864": { "jump": "o", "op": "JUMP" }, "1865": { "op": "JUMPDEST" }, "1866": { "op": "PUSH1", "value": "0x0" }, "1868": { "op": "DUP1" }, "1869": { "op": "PUSH1", "value": "0x40" }, "1871": { "op": "DUP4" }, "1872": { "op": "DUP6" }, "1873": { "op": "SUB" }, "1874": { "op": "SLT" }, "1875": { "op": "ISZERO" }, "1876": { "op": "PUSH2", "value": "0x75C" }, "1879": { 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"2008": { "op": "SWAP4" }, "2009": { "op": "SWAP1" }, "2010": { "op": "SWAP4" }, "2011": { "op": "ADD" }, "2012": { "op": "CALLDATALOAD" }, "2013": { "op": "SWAP4" }, "2014": { "op": "POP" }, "2015": { "op": "POP" }, "2016": { "op": "POP" }, "2017": { "jump": "o", "op": "JUMP" }, "2018": { "op": "JUMPDEST" }, "2019": { "op": "PUSH1", "value": "0x0" }, "2021": { "op": "PUSH1", "value": "0x20" }, "2023": { "op": "DUP1" }, "2024": { "op": "DUP4" }, "2025": { "op": "MSTORE" }, "2026": { "op": "DUP4" }, "2027": { "op": "MLOAD" }, "2028": { "op": "DUP1" }, "2029": { "op": "DUP3" }, "2030": { "op": "DUP6" }, "2031": { "op": "ADD" }, "2032": { "op": "MSTORE" }, "2033": { "op": "PUSH1", "value": "0x0" }, "2035": { "op": "JUMPDEST" }, "2036": { "op": "DUP2" }, "2037": { "op": "DUP2" }, "2038": { "op": "LT" }, "2039": { "op": "ISZERO" }, "2040": { "op": "PUSH2", "value": "0x80F" }, "2043": { "op": "JUMPI" }, "2044": { "op": "DUP6" }, "2045": { "op": "DUP2" }, "2046": { "op": "ADD" }, "2047": { "op": "DUP4" }, "2048": { "op": "ADD" }, "2049": { "op": "MLOAD" }, "2050": { "op": "DUP6" }, "2051": { "op": "DUP3" }, "2052": { "op": "ADD" }, "2053": { "op": "PUSH1", "value": "0x40" }, "2055": { "op": "ADD" }, "2056": { "op": "MSTORE" }, "2057": { "op": "DUP3" }, "2058": { "op": "ADD" }, "2059": { "op": "PUSH2", "value": "0x7F3" }, "2062": { "op": "JUMP" }, "2063": { "op": "JUMPDEST" }, "2064": { "op": "DUP2" }, "2065": { "op": "DUP2" }, "2066": { "op": "GT" }, "2067": { "op": "ISZERO" }, "2068": { "op": "PUSH2", "value": "0x821" }, "2071": { "op": "JUMPI" }, "2072": { "op": "PUSH1", "value": "0x0" }, "2074": { "op": "PUSH1", "value": "0x40" }, "2076": { "op": "DUP4" }, "2077": { "op": "DUP8" }, "2078": { "op": "ADD" }, "2079": { "op": "ADD" }, "2080": { "op": "MSTORE" }, "2081": { "op": "JUMPDEST" }, "2082": { "op": "POP" }, "2083": { "op": "PUSH1", "value": "0x1F" }, "2085": { "op": "ADD" }, "2086": { "op": "PUSH1", "value": "0x1F" }, "2088": { "op": "NOT" }, "2089": { "op": "AND" }, "2090": { "op": "SWAP3" }, "2091": { "op": "SWAP1" }, "2092": { "op": "SWAP3" }, "2093": { "op": "ADD" }, "2094": { "op": "PUSH1", "value": "0x40" }, "2096": { "op": "ADD" }, "2097": { "op": "SWAP4" }, "2098": { "op": "SWAP3" }, "2099": { "op": "POP" }, "2100": { "op": "POP" }, "2101": { "op": "POP" }, "2102": { "jump": "o", "op": "JUMP" }, "2103": { "op": "JUMPDEST" }, "2104": { "op": "PUSH1", "value": "0x0" }, "2106": { "op": "DUP3" }, "2107": { "op": "NOT" }, "2108": { "op": "DUP3" }, "2109": { "op": "GT" }, "2110": { "op": "ISZERO" }, "2111": { "op": "PUSH2", "value": "0x858" }, "2114": { "op": "JUMPI" }, "2115": { "op": "PUSH4", "value": "0x4E487B71" }, "2120": { "op": "PUSH1", "value": "0xE0" }, "2122": { "op": "SHL" }, "2123": { "op": "PUSH1", "value": "0x0" }, "2125": { "op": "MSTORE" }, "2126": { "op": "PUSH1", "value": "0x11" }, "2128": { "op": "PUSH1", "value": "0x4" }, "2130": { "op": "MSTORE" }, "2131": { "op": "PUSH1", "value": "0x24" }, "2133": { "op": "PUSH1", "value": "0x0" }, "2135": { "op": "REVERT" }, "2136": { "op": "JUMPDEST" }, "2137": { "op": "POP" }, "2138": { "op": "ADD" }, "2139": { "op": "SWAP1" }, "2140": { "jump": "o", "op": "JUMP" }, "2141": { "op": "JUMPDEST" }, "2142": { "op": "PUSH1", "value": "0x1" }, "2144": { "op": "DUP2" }, "2145": { "op": "DUP2" }, "2146": { "op": "SHR" }, "2147": { "op": "SWAP1" }, "2148": { "op": "DUP3" }, "2149": { "op": "AND" }, "2150": { "op": "DUP1" }, "2151": { "op": "PUSH2", "value": "0x871" }, "2154": { "op": "JUMPI" }, "2155": { "op": "PUSH1", "value": "0x7F" }, "2157": { "op": "DUP3" }, "2158": { "op": "AND" }, "2159": { "op": "SWAP2" }, "2160": { "op": "POP" }, "2161": { "op": "JUMPDEST" }, "2162": { "op": "PUSH1", "value": "0x20" }, "2164": { "op": "DUP3" }, "2165": { "op": "LT" }, "2166": { "op": "DUP2" }, "2167": { "op": "EQ" }, "2168": { "op": "ISZERO" }, "2169": { "op": "PUSH2", "value": "0x892" }, "2172": { "op": "JUMPI" }, "2173": { "op": "PUSH4", "value": "0x4E487B71" }, "2178": { "op": "PUSH1", "value": "0xE0" }, "2180": { "op": "SHL" }, "2181": { "op": "PUSH1", "value": "0x0" }, "2183": { "op": "MSTORE" }, "2184": { "op": "PUSH1", "value": "0x22" }, "2186": { "op": "PUSH1", "value": "0x4" }, "2188": { "op": "MSTORE" }, "2189": { "op": "PUSH1", "value": "0x24" }, "2191": { "op": "PUSH1", "value": "0x0" }, "2193": { "op": "REVERT" }, "2194": { "op": "JUMPDEST" }, "2195": { "op": "POP" }, "2196": { "op": "SWAP2" }, "2197": { "op": "SWAP1" }, "2198": { "op": "POP" }, "2199": { "jump": "o", "op": "JUMP" } }, "sha1": "fd12549c87e8c9e5fb75fb5786bbf38e8f8c5761", "source": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC20Upgradeable.sol\";\nimport \"./extensions/IERC20MetadataUpgradeable.sol\";\nimport \"../../utils/ContextUpgradeable.sol\";\nimport \"../../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Implementation of the {IERC20} interface.\n *\n * This implementation is agnostic to the way tokens are created. This means\n * that a supply mechanism has to be added in a derived contract using {_mint}.\n * For a generic mechanism see {ERC20PresetMinterPauser}.\n *\n * TIP: For a detailed writeup see our guide\n * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\n *\n * We have followed general OpenZeppelin Contracts guidelines: functions revert\n * instead returning `false` on failure. This behavior is nonetheless\n * conventional and does not conflict with the expectations of ERC20\n * applications.\n *\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n * This allows applications to reconstruct the allowance for all accounts just\n * by listening to said events. Other implementations of the EIP may not emit\n * these events, as it isn't required by the specification.\n *\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n * functions have been added to mitigate the well-known issues around setting\n * allowances. See {IERC20-approve}.\n */\ncontract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable {\n mapping(address => uint256) private _balances;\n\n mapping(address => mapping(address => uint256)) private _allowances;\n\n uint256 private _totalSupply;\n\n string private _name;\n string private _symbol;\n\n /**\n * @dev Sets the values for {name} and {symbol}.\n *\n * The default value of {decimals} is 18. To select a different value for\n * {decimals} you should overload it.\n *\n * All two of these values are immutable: they can only be set once during\n * construction.\n */\n function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing {\n __ERC20_init_unchained(name_, symbol_);\n }\n\n function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {\n _name = name_;\n _symbol = symbol_;\n }\n\n /**\n * @dev Returns the name of the token.\n */\n function name() public view virtual override returns (string memory) {\n return _name;\n }\n\n /**\n * @dev Returns the symbol of the token, usually a shorter version of the\n * name.\n */\n function symbol() public view virtual override returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev Returns the number of decimals used to get its user representation.\n * For example, if `decimals` equals `2`, a balance of `505` tokens should\n * be displayed to a user as `5.05` (`505 / 10 ** 2`).\n *\n * Tokens usually opt for a value of 18, imitating the relationship between\n * Ether and Wei. This is the value {ERC20} uses, unless this function is\n * overridden;\n *\n * NOTE: This information is only used for _display_ purposes: it in\n * no way affects any of the arithmetic of the contract, including\n * {IERC20-balanceOf} and {IERC20-transfer}.\n */\n function decimals() public view virtual override returns (uint8) {\n return 18;\n }\n\n /**\n * @dev See {IERC20-totalSupply}.\n */\n function totalSupply() public view virtual override returns (uint256) {\n return _totalSupply;\n }\n\n /**\n * @dev See {IERC20-balanceOf}.\n */\n function balanceOf(address account) public view virtual override returns (uint256) {\n return _balances[account];\n }\n\n /**\n * @dev See {IERC20-transfer}.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n * - the caller must have a balance of at least `amount`.\n */\n function transfer(address to, uint256 amount) public virtual override returns (bool) {\n address owner = _msgSender();\n _transfer(owner, to, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-allowance}.\n */\n function allowance(address owner, address spender) public view virtual override returns (uint256) {\n return _allowances[owner][spender];\n }\n\n /**\n * @dev See {IERC20-approve}.\n *\n * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on\n * `transferFrom`. This is semantically equivalent to an infinite approval.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\n address owner = _msgSender();\n _approve(owner, spender, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-transferFrom}.\n *\n * Emits an {Approval} event indicating the updated allowance. This is not\n * required by the EIP. See the note at the beginning of {ERC20}.\n *\n * NOTE: Does not update the allowance if the current allowance\n * is the maximum `uint256`.\n *\n * Requirements:\n *\n * - `from` and `to` cannot be the zero address.\n * - `from` must have a balance of at least `amount`.\n * - the caller must have allowance for ``from``'s tokens of at least\n * `amount`.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) public virtual override returns (bool) {\n address spender = _msgSender();\n _spendAllowance(from, spender, amount);\n _transfer(from, to, amount);\n return true;\n }\n\n /**\n * @dev Atomically increases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\n address owner = _msgSender();\n _approve(owner, spender, _allowances[owner][spender] + addedValue);\n return true;\n }\n\n /**\n * @dev Atomically decreases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `spender` must have allowance for the caller of at least\n * `subtractedValue`.\n */\n function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\n address owner = _msgSender();\n uint256 currentAllowance = _allowances[owner][spender];\n require(currentAllowance >= subtractedValue, \"ERC20: decreased allowance below zero\");\n unchecked {\n _approve(owner, spender, currentAllowance - subtractedValue);\n }\n\n return true;\n }\n\n /**\n * @dev Moves `amount` of tokens from `sender` to `recipient`.\n *\n * This internal function is equivalent to {transfer}, and can be used to\n * e.g. implement automatic token fees, slashing mechanisms, etc.\n *\n * Emits a {Transfer} event.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `from` must have a balance of at least `amount`.\n */\n function _transfer(\n address from,\n address to,\n uint256 amount\n ) internal virtual {\n require(from != address(0), \"ERC20: transfer from the zero address\");\n require(to != address(0), \"ERC20: transfer to the zero address\");\n\n _beforeTokenTransfer(from, to, amount);\n\n uint256 fromBalance = _balances[from];\n require(fromBalance >= amount, \"ERC20: transfer amount exceeds balance\");\n unchecked {\n _balances[from] = fromBalance - amount;\n }\n _balances[to] += amount;\n\n emit Transfer(from, to, amount);\n\n _afterTokenTransfer(from, to, amount);\n }\n\n /** @dev Creates `amount` tokens and assigns them to `account`, increasing\n * the total supply.\n *\n * Emits a {Transfer} event with `from` set to the zero address.\n *\n * Requirements:\n *\n * - `account` cannot be the zero address.\n */\n function _mint(address account, uint256 amount) internal virtual {\n require(account != address(0), \"ERC20: mint to the zero address\");\n\n _beforeTokenTransfer(address(0), account, amount);\n\n _totalSupply += amount;\n _balances[account] += amount;\n emit Transfer(address(0), account, amount);\n\n _afterTokenTransfer(address(0), account, amount);\n }\n\n /**\n * @dev Destroys `amount` tokens from `account`, reducing the\n * total supply.\n *\n * Emits a {Transfer} event with `to` set to the zero address.\n *\n * Requirements:\n *\n * - `account` cannot be the zero address.\n * - `account` must have at least `amount` tokens.\n */\n function _burn(address account, uint256 amount) internal virtual {\n require(account != address(0), \"ERC20: burn from the zero address\");\n\n _beforeTokenTransfer(account, address(0), amount);\n\n uint256 accountBalance = _balances[account];\n require(accountBalance >= amount, \"ERC20: burn amount exceeds balance\");\n unchecked {\n _balances[account] = accountBalance - amount;\n }\n _totalSupply -= amount;\n\n emit Transfer(account, address(0), amount);\n\n _afterTokenTransfer(account, address(0), amount);\n }\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n *\n * This internal function is equivalent to `approve`, and can be used to\n * e.g. set automatic allowances for certain subsystems, etc.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `owner` cannot be the zero address.\n * - `spender` cannot be the zero address.\n */\n function _approve(\n address owner,\n address spender,\n uint256 amount\n ) internal virtual {\n require(owner != address(0), \"ERC20: approve from the zero address\");\n require(spender != address(0), \"ERC20: approve to the zero address\");\n\n _allowances[owner][spender] = amount;\n emit Approval(owner, spender, amount);\n }\n\n /**\n * @dev Spend `amount` form the allowance of `owner` toward `spender`.\n *\n * Does not update the allowance amount in case of infinite allowance.\n * Revert if not enough allowance is available.\n *\n * Might emit an {Approval} event.\n */\n function _spendAllowance(\n address owner,\n address spender,\n uint256 amount\n ) internal virtual {\n uint256 currentAllowance = allowance(owner, spender);\n if (currentAllowance != type(uint256).max) {\n require(currentAllowance >= amount, \"ERC20: insufficient allowance\");\n unchecked {\n _approve(owner, spender, currentAllowance - amount);\n }\n }\n }\n\n /**\n * @dev Hook that is called before any transfer of tokens. This includes\n * minting and burning.\n *\n * Calling conditions:\n *\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n * will be transferred to `to`.\n * - when `from` is zero, `amount` tokens will be minted for `to`.\n * - when `to` is zero, `amount` of ``from``'s tokens 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 amount\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, `amount` of ``from``'s tokens\n * has been transferred to `to`.\n * - when `from` is zero, `amount` tokens have been minted for `to`.\n * - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(\n address from,\n address to,\n uint256 amount\n ) internal virtual {}\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[45] private __gap;\n}\n", "sourceMap": "1482:11772:75:-:0;;;;;;;;;;;;;;;;;;;", "sourcePath": "node_modules/@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol", "type": "contract" }