{ "fileName": "ERC20Burnable.sol", "contractName": "ERC20BurnableUpgradeSafe", "source": "pragma solidity ^0.6.0;\n\nimport \"../../GSN/Context.sol\";\nimport \"./ERC20.sol\";\nimport \"../../Initializable.sol\";\n\n/**\n * @dev Extension of {ERC20} that allows token holders to destroy both their own\n * tokens and those that they have an allowance for, in a way that can be\n * recognized off-chain (via event analysis).\n */\nabstract contract ERC20BurnableUpgradeSafe is Initializable, ContextUpgradeSafe, ERC20UpgradeSafe {\n function __ERC20Burnable_init() internal initializer {\n __Context_init_unchained();\n __ERC20Burnable_init_unchained();\n }\n\n function __ERC20Burnable_init_unchained() internal initializer {\n\n\n }\n\n /**\n * @dev Destroys `amount` tokens from the caller.\n *\n * See {ERC20-_burn}.\n */\n function burn(uint256 amount) public virtual {\n _burn(_msgSender(), amount);\n }\n\n /**\n * @dev Destroys `amount` tokens from `account`, deducting from the caller's\n * allowance.\n *\n * See {ERC20-_burn} and {ERC20-allowance}.\n *\n * Requirements:\n *\n * - the caller must have allowance for ``accounts``'s tokens of at least\n * `amount`.\n */\n function burnFrom(address account, uint256 amount) public virtual {\n uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, \"ERC20: burn amount exceeds allowance\");\n\n _approve(account, _msgSender(), decreasedAllowance);\n _burn(account, amount);\n }\n\n uint256[50] private __gap;\n}\n", "sourcePath": "contracts/token/ERC20/ERC20Burnable.sol", "sourceMap": "", "deployedSourceMap": "", "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": [ { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "burn", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "account", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "burnFrom", "outputs": [], "stateMutability": "nonpayable", "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": "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" } ], "ast": { "absolutePath": "contracts/token/ERC20/ERC20Burnable.sol", "exportedSymbols": { "ERC20BurnableUpgradeSafe": [ 10262 ] }, "id": 10263, "nodeType": "SourceUnit", "nodes": [ { "id": 10183, "literals": [ "solidity", "^", "0.6", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:79" }, { "absolutePath": "contracts/GSN/Context.sol", "file": "../../GSN/Context.sol", "id": 10184, "nodeType": "ImportDirective", "scope": 10263, "sourceUnit": 45, "src": "25:31:79", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": 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"typeIdentifier": "t_stringliteral_a287c363786607a1457a2d9d12fa61c0073358e02d76b4035fc2c2d86a19c0db", "typeString": "literal_string \"ERC20: burn amount exceeds allowance\"" }, "value": "ERC20: burn amount exceeds allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_a287c363786607a1457a2d9d12fa61c0073358e02d76b4035fc2c2d86a19c0db", "typeString": "literal_string \"ERC20: burn amount exceeds allowance\"" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 10235, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10227, "src": "1262:7:79", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 10236, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 28, "src": "1271:10:79", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 10237, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1271:12:79", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" } ], "id": 10234, "name": "allowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 9816, "src": "1252:9:79", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view returns (uint256)" } }, "id": 10238, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1252:32:79", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 10239, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 3030, "src": "1252:36:79", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 10242, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1252:84:79", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", 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"typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 10248, "name": "decreasedAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10233, "src": "1379:18:79", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 10244, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10154, "src": "1347:8:79", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 10249, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1347:51:79", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10250, "nodeType": "ExpressionStatement", "src": "1347:51:79" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 10252, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10227, "src": "1414:7:79", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 10253, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10229, "src": "1423:6:79", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 10251, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10109, "src": "1408:5:79", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 10254, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1408:22:79", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10255, "nodeType": "ExpressionStatement", "src": "1408:22:79" } ] }, "documentation": { "id": 10225, "nodeType": "StructuredDocumentation", "src": "847:295:79", "text": "@dev Destroys `amount` tokens from `account`, deducting from the caller's\nallowance.\n * See {ERC20-_burn} and {ERC20-allowance}.\n * Requirements:\n * - the caller must have allowance for ``accounts``'s tokens of at least\n`amount`." }, 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