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"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": [ { "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": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "_recipient", "type": "address" }, { "internalType": "uint256", "name": "_amount", "type": "uint256" } ], "name": "transfer", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "_sender", "type": "address" }, { "internalType": "address", "name": "_recipient", "type": "address" }, { "internalType": "uint256", "name": "_amount", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" } ], "bytecode": { "object": "0x", "sourceMap": "", "linkReferences": {} }, "deployedBytecode": { "object": "0x", "sourceMap": "", "linkReferences": {} }, "methodIdentifiers": { "allowance(address,address)": "dd62ed3e", "approve(address,uint256)": "095ea7b3", "balanceOf(address)": "70a08231", "decreaseAllowance(address,uint256)": "a457c2d7", "increaseAllowance(address,uint256)": "39509351", "totalSupply()": "18160ddd", "transfer(address,uint256)": "a9059cbb", "transferFrom(address,address,uint256)": "23b872dd" }, "ast": { "absolutePath": "packages/contracts-bridge/contracts/vendored/OZERC20.sol", "id": 43238, "exportedSymbols": { "ERC20": [ 43237 ], "IERC20": [ 27517 ], "SafeMath": [ 26851 ] }, "nodeType": "SourceUnit", "src": "32:10245:62", "nodes": [ { "id": 42782, "nodeType": "PragmaDirective", "src": "32:22:62", "literals": [ "solidity", "0.7", ".6" ] }, { "id": 42783, "nodeType": "ImportDirective", "src": "323:56:62", "absolutePath": 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"typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "arguments": [ { "id": 42883, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42860, "src": "3489:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "45524332303a207472616e7366657220616d6f756e74206578636565647320616c6c6f77616e6365", "id": 42884, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3514:42:62", "typeDescriptions": { "typeIdentifier": "t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330", "typeString": "literal_string \"ERC20: transfer amount exceeds allowance\"" }, "value": "ERC20: transfer amount exceeds allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330", "typeString": "literal_string \"ERC20: transfer amount exceeds allowance\"" } ], "expression": { "baseExpression": { "baseExpression": { "id": 42876, "name": "allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42800, "src": "3436:10:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 42878, "indexExpression": { "id": 42877, "name": "_sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42856, "src": "3447:7:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3436:19:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 42881, "indexExpression": { "expression": { "id": 42879, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "3456:3:62", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 42880, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "3456:10:62", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3436:31:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 42882, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 26802, "src": "3436:35:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 42885, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3436:134:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 42872, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43212, "src": "3369:8:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 42886, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3369:211:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 42887, "nodeType": "ExpressionStatement", "src": "3369:211:62" }, { "expression": { "hexValue": "74727565", "id": 42888, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3597:4:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 42865, "id": 42889, "nodeType": "Return", "src": "3590:11:62" } ] }, "baseFunctions": [ 27498 ], "documentation": { "id": 42854, "nodeType": "StructuredDocumentation", "src": "2701:459:62", "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 Requirements:\n - `_sender` and `recipient` cannot be the zero address.\n - `_sender` must have a balance of at least `amount`.\n - the caller must have allowance for ``_sender``'s tokens of at least\n `amount`." }, "functionSelector": "23b872dd", "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "overrides": { "id": 42862, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3286:8:62" }, "parameters": { "id": 42861, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 42856, "mutability": "mutable", "name": "_sender", "nodeType": "VariableDeclaration", "scope": 42891, "src": "3196:15:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 42855, "name": "address", "nodeType": "ElementaryTypeName", "src": "3196:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 42858, "mutability": "mutable", "name": "_recipient", "nodeType": "VariableDeclaration", "scope": 42891, "src": "3221:18:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 42857, "name": "address", "nodeType": "ElementaryTypeName", "src": "3221:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 42860, "mutability": "mutable", "name": "_amount", "nodeType": "VariableDeclaration", "scope": 42891, "src": "3249:15:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 42859, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3249:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3186:84:62" }, "returnParameters": { "id": 42865, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 42864, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 42891, "src": "3304:4:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 42863, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3304:4:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "3303:6:62" }, "scope": 43237, "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "id": 42919, "nodeType": "FunctionDefinition", "src": "4004:289:62", "body": { "id": 42918, "nodeType": "Block", "src": "4128:165:62", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 42902, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "4160:3:62", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 42903, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "4160:10:62", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "id": 42904, "name": "_spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42894, "src": "4184:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "id": 42912, "name": "_addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42896, "src": "4243:11:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "baseExpression": { "baseExpression": { "id": 42905, "name": "allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42800, "src": "4206:10:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 42908, "indexExpression": { "expression": { "id": 42906, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "4217:3:62", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 42907, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "4217:10:62", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4206:22:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 42910, "indexExpression": { "id": 42909, "name": "_spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42894, "src": "4229:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4206:32:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 42911, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 26678, "src": "4206:36:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 42913, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4206:49:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 42901, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43212, "src": "4138:8:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 42914, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4138:127:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 42915, "nodeType": "ExpressionStatement", "src": "4138:127:62" }, { "expression": { "hexValue": "74727565", "id": 42916, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4282:4:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 42900, "id": 42917, "nodeType": "Return", "src": "4275:11:62" } ] }, "documentation": { "id": 42892, "nodeType": "StructuredDocumentation", "src": "3614:385:62", "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", "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "parameters": { "id": 42897, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 42894, "mutability": "mutable", "name": "_spender", "nodeType": "VariableDeclaration", "scope": 42919, "src": "4031:16:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 42893, "name": "address", "nodeType": "ElementaryTypeName", "src": "4031:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 42896, "mutability": "mutable", "name": "_addedValue", "nodeType": "VariableDeclaration", "scope": 42919, "src": "4049:19:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 42895, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4049:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4030:39:62" }, "returnParameters": { "id": 42900, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 42899, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 42919, "src": "4118:4:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 42898, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4118:4:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "4117:6:62" }, "scope": 43237, "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "id": 42948, "nodeType": "FunctionDefinition", "src": "4783:386:62", "body": { "id": 42947, "nodeType": "Block", "src": "4912:257:62", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 42930, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "4944:3:62", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 42931, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "4944:10:62", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "id": 42932, "name": "_spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42922, "src": "4968:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "id": 42940, "name": "_subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42924, "src": "5044:16:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 42941, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5078:39:62", "typeDescriptions": { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" }, "value": "ERC20: decreased allowance below zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" } ], "expression": { "baseExpression": { "baseExpression": { "id": 42933, "name": "allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42800, "src": "4990:10:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 42936, "indexExpression": { "expression": { "id": 42934, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "5001:3:62", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 42935, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "5001:10:62", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4990:22:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 42938, "indexExpression": { "id": 42937, "name": "_spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42922, "src": "5013:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4990:32:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 42939, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 26802, "src": "4990:36:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 42942, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4990:141:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 42929, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43212, "src": "4922:8:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 42943, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4922:219:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 42944, "nodeType": "ExpressionStatement", "src": "4922:219:62" }, { "expression": { "hexValue": "74727565", "id": 42945, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "5158:4:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 42928, "id": 42946, "nodeType": "Return", "src": "5151:11:62" } ] }, "documentation": { "id": 42920, "nodeType": "StructuredDocumentation", "src": "4299:479:62", "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", "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "parameters": { "id": 42925, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 42922, "mutability": "mutable", "name": "_spender", "nodeType": "VariableDeclaration", "scope": 42948, "src": "4810:16:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 42921, "name": "address", "nodeType": "ElementaryTypeName", "src": "4810:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 42924, "mutability": "mutable", "name": "_subtractedValue", "nodeType": "VariableDeclaration", "scope": 42948, "src": "4828:24:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 42923, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4828:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4809:44:62" }, "returnParameters": { "id": 42928, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 42927, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 42948, "src": "4902:4:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 42926, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4902:4:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "4901:6:62" }, "scope": 43237, "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "id": 42958, "nodeType": "FunctionDefinition", "src": "5229:92:62", "body": { "id": 42957, "nodeType": "Block", "src": "5291:30:62", "statements": [ { "expression": { "id": 42955, "name": "supply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42802, "src": "5308:6:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 42954, "id": 42956, "nodeType": "Return", "src": "5301:13:62" } ] }, "baseFunctions": [ 27448 ], "documentation": { "id": 42949, "nodeType": "StructuredDocumentation", "src": "5175:49:62", "text": " @dev See {IERC20-totalSupply}." }, "functionSelector": "18160ddd", "implemented": true, "kind": "function", "modifiers": [], "name": "totalSupply", 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"typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "arguments": [ { "id": 43045, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42997, "src": "6852:6:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "baseExpression": { "id": 43041, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42794, "src": "6827:8:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 43043, "indexExpression": { "id": 43042, "name": "_recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42995, "src": "6836:10:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6827:20:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43044, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 26678, "src": "6827:24:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 43046, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6827:32:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6804:55:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43048, "nodeType": "ExpressionStatement", "src": "6804:55:62" }, { "eventCall": { "arguments": [ { "id": 43050, "name": "_sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42993, "src": "6883:7:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 43051, "name": "_recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42995, "src": "6892:10:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 43052, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42997, "src": "6904:6:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 43049, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 27507, "src": "6874:8:62", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 43053, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6874:37:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43054, "nodeType": "EmitStatement", "src": "6869:42:62" } ] }, "documentation": { "id": 42991, "nodeType": "StructuredDocumentation", "src": "5809:468:62", "text": " @dev Moves tokens `amount` from `_sender` to `_recipient`.\n This is 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 - `_sender` cannot be the zero address.\n - `_recipient` cannot be the zero address.\n - `_sender` must have a balance of at least `amount`." }, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "parameters": { "id": 42998, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 42993, "mutability": "mutable", "name": "_sender", "nodeType": "VariableDeclaration", "scope": 43056, "src": "6310:15:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 42992, "name": "address", "nodeType": "ElementaryTypeName", "src": "6310:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 42995, "mutability": "mutable", "name": "_recipient", "nodeType": "VariableDeclaration", "scope": 43056, "src": "6335:18:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 42994, "name": "address", "nodeType": "ElementaryTypeName", "src": "6335:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 42997, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 43056, "src": "6363:14:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 42996, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6363:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "6300:83:62" }, "returnParameters": { "id": 42999, "nodeType": "ParameterList", "parameters": [], "src": "6401:0:62" }, "scope": 43237, "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "id": 43111, "nodeType": "FunctionDefinition", "src": "7191:367:62", "body": { "id": 43110, "nodeType": "Block", "src": "7258:300:62", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 43070, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 43065, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43059, "src": "7276:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 43068, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7296:1:62", "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": 43067, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7288:7:62", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 43066, "name": "address", "nodeType": "ElementaryTypeName", "src": "7288:7:62", "typeDescriptions": {} } }, "id": 43069, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7288:10:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "7276:22:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206d696e7420746f20746865207a65726f2061646472657373", "id": 43071, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7300:33:62", "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": 43064, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "7268:7:62", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 43072, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7268:66:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43073, "nodeType": "ExpressionStatement", "src": "7268:66:62" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 43077, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7374:1:62", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 43076, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7366:7:62", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 43075, "name": "address", "nodeType": "ElementaryTypeName", "src": "7366:7:62", "typeDescriptions": {} } }, "id": 43078, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7366:10:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "id": 43079, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43059, "src": "7378:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 43080, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43061, "src": "7388:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 43074, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43236, "src": "7345:20:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 43081, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7345:51:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43082, "nodeType": "ExpressionStatement", "src": "7345:51:62" }, { "expression": { "id": 43088, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 43083, "name": "supply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42802, "src": "7407:6:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "arguments": [ { "id": 43086, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43061, "src": "7427:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 43084, "name": "supply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42802, "src": "7416:6:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43085, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 26678, "src": "7416:10:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 43087, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7416:19:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7407:28:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43089, "nodeType": "ExpressionStatement", "src": "7407:28:62" }, { "expression": { "id": 43099, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 43090, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42794, "src": "7445:8:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 43092, "indexExpression": { "id": 43091, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43059, "src": "7454:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "7445:18:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "arguments": [ { "id": 43097, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43061, "src": "7489:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "baseExpression": { "id": 43093, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42794, "src": "7466:8:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 43095, "indexExpression": { "id": 43094, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43059, "src": "7475:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7466:18:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43096, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 26678, "src": "7466:22:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 43098, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7466:31:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7445:52:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43100, "nodeType": "ExpressionStatement", "src": "7445:52:62" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 43104, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7529:1:62", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 43103, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7521:7:62", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 43102, "name": "address", "nodeType": "ElementaryTypeName", "src": "7521:7:62", "typeDescriptions": {} } }, "id": 43105, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7521:10:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "id": 43106, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43059, "src": "7533:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 43107, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43061, "src": "7543:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 43101, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 27507, "src": "7512:8:62", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 43108, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7512:39:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43109, "nodeType": "EmitStatement", "src": "7507:44:62" } ] }, "documentation": { "id": 43057, "nodeType": "StructuredDocumentation", "src": "6924:262:62", "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 - `to` cannot be the zero address." }, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "parameters": { "id": 43062, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 43059, "mutability": "mutable", "name": "_account", "nodeType": "VariableDeclaration", "scope": 43111, "src": "7206:16:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 43058, "name": "address", "nodeType": "ElementaryTypeName", "src": "7206:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 43061, "mutability": "mutable", "name": "_amount", "nodeType": "VariableDeclaration", "scope": 43111, "src": "7224:15:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 43060, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7224:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7205:35:62" }, "returnParameters": { "id": 43063, "nodeType": "ParameterList", "parameters": [], "src": "7258:0:62" }, "scope": 43237, "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "id": 43167, "nodeType": "FunctionDefinition", "src": "7883:441:62", "body": { "id": 43166, "nodeType": "Block", "src": "7950:374:62", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 43125, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 43120, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43114, "src": "7968:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 43123, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7988:1:62", "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": 43122, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7980:7:62", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 43121, "name": "address", "nodeType": "ElementaryTypeName", "src": "7980:7:62", "typeDescriptions": {} } }, "id": 43124, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7980:10:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "7968:22:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e2066726f6d20746865207a65726f2061646472657373", "id": 43126, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7992:35:62", "typeDescriptions": { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" }, "value": "ERC20: burn from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" } ], "id": 43119, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "7960:7:62", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 43127, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7960:68:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43128, "nodeType": "ExpressionStatement", "src": "7960:68:62" }, { "expression": { "arguments": [ { "id": 43130, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43114, "src": "8060:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 43133, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8078:1:62", "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": 43132, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8070:7:62", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 43131, "name": "address", "nodeType": "ElementaryTypeName", "src": "8070:7:62", "typeDescriptions": {} } }, "id": 43134, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8070:10:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "id": 43135, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43116, "src": "8082:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 43129, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43236, "src": "8039:20:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 43136, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8039:51:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43137, "nodeType": "ExpressionStatement", "src": "8039:51:62" }, { "expression": { "id": 43148, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 43138, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42794, "src": "8101:8:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 43140, "indexExpression": { "id": 43139, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43114, "src": "8110:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8101:18:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "arguments": [ { "id": 43145, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43116, "src": "8158:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "45524332303a206275726e20616d6f756e7420657863656564732062616c616e6365", "id": 43146, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8179:36:62", "typeDescriptions": { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" }, "value": "ERC20: burn amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" } ], "expression": { "baseExpression": { "id": 43141, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42794, "src": "8122:8:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 43143, "indexExpression": { "id": 43142, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43114, "src": "8131:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "8122:18:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43144, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 26802, "src": "8122:22:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 43147, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8122:103:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8101:124:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43149, "nodeType": "ExpressionStatement", "src": "8101:124:62" }, { "expression": { "id": 43155, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 43150, "name": "supply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42802, "src": "8235:6:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "arguments": [ { "id": 43153, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43116, "src": "8255:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 43151, "name": "supply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42802, "src": "8244:6:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43152, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 26700, "src": "8244:10:62", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 43154, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8244:19:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8235:28:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43156, "nodeType": "ExpressionStatement", "src": "8235:28:62" }, { "eventCall": { "arguments": [ { "id": 43158, "name": "_account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43114, "src": "8287:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 43161, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8305:1:62", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 43160, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8297:7:62", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 43159, "name": "address", "nodeType": "ElementaryTypeName", "src": "8297:7:62", "typeDescriptions": {} } }, "id": 43162, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8297:10:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "id": 43163, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43116, "src": "8309:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 43157, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 27507, "src": "8278:8:62", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 43164, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8278:39:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43165, "nodeType": "EmitStatement", "src": "8273:44:62" } ] }, "documentation": { "id": 43112, "nodeType": "StructuredDocumentation", "src": "7564:314:62", "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." }, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "parameters": { "id": 43117, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 43114, "mutability": "mutable", "name": "_account", "nodeType": "VariableDeclaration", "scope": 43167, "src": "7898:16:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 43113, "name": "address", "nodeType": "ElementaryTypeName", "src": "7898:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 43116, "mutability": "mutable", "name": "_amount", "nodeType": "VariableDeclaration", "scope": 43167, "src": "7916:15:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 43115, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7916:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7897:35:62" }, "returnParameters": { "id": 43118, "nodeType": "ParameterList", "parameters": [], "src": "7950:0:62" }, "scope": 43237, "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "id": 43212, "nodeType": "FunctionDefinition", "src": "8752:380:62", "body": { "id": 43211, "nodeType": "Block", "src": "8868:264:62", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 43183, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 43178, "name": "_owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43170, "src": "8886:6:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 43181, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8904:1:62", "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": 43180, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8896:7:62", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 43179, "name": "address", "nodeType": "ElementaryTypeName", "src": "8896:7:62", "typeDescriptions": {} } }, "id": 43182, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8896:10:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "8886:20:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 43184, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8908:38:62", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" }, "value": "ERC20: approve from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" } ], "id": 43177, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "8878:7:62", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 43185, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8878:69:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43186, "nodeType": "ExpressionStatement", "src": "8878:69:62" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 43193, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 43188, "name": "_spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43172, "src": "8965:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 43191, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8985:1:62", "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": 43190, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8977:7:62", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 43189, "name": "address", "nodeType": "ElementaryTypeName", "src": "8977:7:62", "typeDescriptions": {} } }, "id": 43192, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8977:10:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "8965:22:62", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 43194, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8989:36:62", "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": 43187, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "8957:7:62", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 43195, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8957:69:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43196, "nodeType": "ExpressionStatement", "src": "8957:69:62" }, { "expression": { "id": 43203, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 43197, "name": "allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42800, "src": "9037:10:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 43200, "indexExpression": { "id": 43198, "name": "_owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43170, "src": "9048:6:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9037:18:62", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 43201, "indexExpression": { "id": 43199, "name": "_spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43172, "src": "9056:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9037:28:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 43202, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43174, "src": "9068:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9037:38:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 43204, "nodeType": "ExpressionStatement", "src": "9037:38:62" }, { "eventCall": { "arguments": [ { "id": 43206, "name": "_owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43170, "src": "9099:6:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 43207, "name": "_spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43172, "src": "9107:8:62", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 43208, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43174, "src": "9117:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 43205, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 27516, "src": "9090:8:62", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 43209, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9090:35:62", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 43210, "nodeType": "EmitStatement", "src": "9085:40:62" } ] }, "documentation": { "id": 43168, "nodeType": "StructuredDocumentation", "src": "8330:417:62", "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." }, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "parameters": { "id": 43175, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 43170, "mutability": "mutable", "name": "_owner", "nodeType": "VariableDeclaration", "scope": 43212, "src": "8779:14:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 43169, "name": "address", "nodeType": "ElementaryTypeName", "src": "8779:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 43172, "mutability": "mutable", "name": "_spender", "nodeType": "VariableDeclaration", "scope": 43212, "src": "8803:16:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 43171, "name": "address", "nodeType": "ElementaryTypeName", "src": "8803:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 43174, "mutability": "mutable", "name": "_amount", "nodeType": "VariableDeclaration", "scope": 43212, "src": "8829:15:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 43173, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8829:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8769:81:62" }, "returnParameters": { "id": 43176, "nodeType": "ParameterList", "parameters": [], "src": "8868:0:62" }, "scope": 43237, "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "id": 43225, "nodeType": "FunctionDefinition", "src": "9457:93:62", "body": { "id": 43224, "nodeType": "Block", "src": "9507:43:62", "statements": [ { "expression": { "id": 43222, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "expression": { "id": 43218, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 42811, "src": "9517:5:62", "typeDescriptions": { "typeIdentifier": "t_struct$_Token_$42809_storage", "typeString": "struct ERC20.Token storage ref" } }, "id": 43220, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "memberName": "decimals", "nodeType": "MemberAccess", "referencedDeclaration": 42808, "src": "9517:14:62", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 43221, "name": "decimals_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 43215, "src": "9534:9:62", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "src": "9517:26:62", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "id": 43223, "nodeType": "ExpressionStatement", "src": "9517:26:62" } ] }, "documentation": { "id": 43213, "nodeType": "StructuredDocumentation", "src": "9138:314:62", "text": " @dev Sets {decimals_} to a value other than the default one of 18.\n WARNING: This function should only be called from the constructor. Most\n applications that interact with token contracts will not expect\n {decimals_} to ever change, and may work incorrectly if it does." }, "implemented": true, "kind": "function", "modifiers": [], "name": "_setupDecimals", "parameters": { "id": 43216, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 43215, "mutability": "mutable", "name": "decimals_", "nodeType": "VariableDeclaration", "scope": 43225, "src": "9481:15:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 43214, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "9481:5:62", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "src": "9480:17:62" }, "returnParameters": { "id": 43217, "nodeType": "ParameterList", "parameters": [], "src": "9507:0:62" }, "scope": 43237, "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "id": 43236, "nodeType": "FunctionDefinition", "src": "10150:124:62", "body": { "id": 43235, "nodeType": "Block", "src": "10272:2:62", "statements": [] }, "documentation": { "id": 43226, "nodeType": "StructuredDocumentation", "src": "9556:589:62", "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 to 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]." }, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "parameters": { "id": 43233, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 43228, "mutability": "mutable", "name": "_from", "nodeType": "VariableDeclaration", "scope": 43236, "src": "10189:13:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 43227, "name": "address", "nodeType": "ElementaryTypeName", "src": "10189:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 43230, "mutability": "mutable", "name": "_to", "nodeType": "VariableDeclaration", "scope": 43236, "src": "10212:11:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 43229, "name": "address", "nodeType": "ElementaryTypeName", "src": "10212:7:62", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 43232, "mutability": "mutable", "name": "_amount", "nodeType": "VariableDeclaration", "scope": 43236, "src": "10233:15:62", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 43231, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10233:7:62", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10179:75:62" }, "returnParameters": { "id": 43234, "nodeType": "ParameterList", "parameters": [], "src": "10272:0:62" }, "scope": 43237, "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "abstract": true, "baseContracts": [ { "baseName": { "id": 42786, "name": "IERC20", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 27517, "src": "1623:6:62", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$27517", "typeString": "contract IERC20" } }, "id": 42787, "nodeType": "InheritanceSpecifier", "src": "1623:6:62" } ], "contractDependencies": [ 27517 ], "contractKind": "contract", "documentation": { "id": 42785, "nodeType": "StructuredDocumentation", "src": "433:1162:62", "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 guidelines: functions revert instead\n of returning `false` on failure. This behavior is nonetheless conventional\n and does not conflict with the expectations of ERC20 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, "linearizedBaseContracts": [ 43237, 27517 ], "name": "ERC20", "scope": 43238 } ], "license": "MIT" }, "id": 62 }