{ "contractName": "ERC20", "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" }, { "constant": true, "inputs": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "account", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transfer", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "spender", "type": "address" } ], "name": "allowance", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "approve", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "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" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "addedValue", "type": "uint256" } ], "name": "increaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "subtractedValue", "type": "uint256" } ], "name": "decreaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.5.17+commit.d19bba13\"},\"language\":\"Solidity\",\"output\":{\"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\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"subtractedValue\",\"type\":\"uint256\"}],\"name\":\"decreaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"addedValue\",\"type\":\"uint256\"}],\"name\":\"increaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"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\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Implementation of the {IERC20} interface. * This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20Mintable}. * TIP: For a detailed writeup see our guide https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How to implement supply mechanisms]. * We have followed general OpenZeppelin guidelines: functions revert instead of returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. * Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}.\",\"methods\":{\"allowance(address,address)\":{\"details\":\"See {IERC20-allowance}.\"},\"approve(address,uint256)\":{\"details\":\"See {IERC20-approve}. * Requirements: * - `spender` cannot be the zero address.\"},\"balanceOf(address)\":{\"details\":\"See {IERC20-balanceOf}.\"},\"decreaseAllowance(address,uint256)\":{\"details\":\"Atomically decreases the allowance granted to `spender` by the caller. * This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. * Emits an {Approval} event indicating the updated allowance. * Requirements: * - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`.\"},\"increaseAllowance(address,uint256)\":{\"details\":\"Atomically increases the allowance granted to `spender` by the caller. * This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. * Emits an {Approval} event indicating the updated allowance. * Requirements: * - `spender` cannot be the zero address.\"},\"totalSupply()\":{\"details\":\"See {IERC20-totalSupply}.\"},\"transfer(address,uint256)\":{\"details\":\"See {IERC20-transfer}. * Requirements: * - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"See {IERC20-transferFrom}. * Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}; * Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for `sender`'s tokens of at least `amount`.\"}}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/token/ERC20/ERC20.sol\":\"ERC20\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/GSN/Context.sol\":{\"keccak256\":\"0x90a3995645af7562d84b9d69363ffa5ae7217714ab61e951bf7bc450f40e4061\",\"urls\":[\"bzz-raw://216ef9d6b614db4eb46970b4e84903f2534a45572dd30a79f0041f1a5830f436\",\"dweb:/ipfs/QmNPrJ4MWKUAWzKXpUqeyKRUfosaoANZAqXgvepdrCwZAG\"]},\"@openzeppelin/contracts/math/SafeMath.sol\":{\"keccak256\":\"0x640b6dee7a4b830bdfd52b5031a07fc2b12209f5b2e29e5d364a7d37f69d8076\",\"urls\":[\"bzz-raw://31113152e1ddb78fe7a4197f247591ca894e93f916867beb708d8e747b6cc74f\",\"dweb:/ipfs/QmbZaJyXdpsYGykVhHH9qpVGQg9DGCxE2QufbCUy3daTgq\"]},\"@openzeppelin/contracts/token/ERC20/ERC20.sol\":{\"keccak256\":\"0xb15af804e2bc97db51e4e103f13de9fe13f87e6b835d7a88c897966c0e58506e\",\"urls\":[\"bzz-raw://1e8cff8437557fc915a3bed968fcd8f2df9809599e665ef69c2c9ce628548055\",\"dweb:/ipfs/QmP5spYP8vs2jvLF8zNrXUbqB79hMsoEvMHiLcBxerWKcm\"]},\"@openzeppelin/contracts/token/ERC20/IERC20.sol\":{\"keccak256\":\"0xe5bb0f57cff3e299f360052ba50f1ea0fff046df2be070b6943e0e3c3fdad8a9\",\"urls\":[\"bzz-raw://59fd025151435da35faa8093a5c7a17de02de9d08ad27275c5cdf05050820d91\",\"dweb:/ipfs/QmQMvwEcPhoRXzbXyrdoeRtvLoifUW9Qh7Luho7bmUPRkc\"]}},\"version\":1}", 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"source": "pragma solidity ^0.5.0;\n\nimport \"../../GSN/Context.sol\";\nimport \"./IERC20.sol\";\nimport \"../../math/SafeMath.sol\";\n\n/**\n * @dev Implementation of the {IERC20} interface.\n *\n * This implementation is agnostic to the way tokens are created. This means\n * that a supply mechanism has to be added in a derived contract using {_mint}.\n * For a generic mechanism see {ERC20Mintable}.\n *\n * TIP: For a detailed writeup see our guide\n * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\n *\n * We have followed general OpenZeppelin 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 *\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n * This allows applications to reconstruct the allowance for all accounts just\n * by listening to said events. Other implementations of the EIP may not emit\n * these events, as it isn't required by the specification.\n *\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n * functions have been added to mitigate the well-known issues around setting\n * allowances. See {IERC20-approve}.\n */\ncontract ERC20 is Context, IERC20 {\n using SafeMath for uint256;\n\n mapping (address => uint256) private _balances;\n\n mapping (address => mapping (address => uint256)) private _allowances;\n\n uint256 private _totalSupply;\n\n /**\n * @dev See {IERC20-totalSupply}.\n */\n function totalSupply() public view returns (uint256) {\n return _totalSupply;\n }\n\n /**\n * @dev See {IERC20-balanceOf}.\n */\n function balanceOf(address account) public view returns (uint256) {\n return _balances[account];\n }\n\n /**\n * @dev See {IERC20-transfer}.\n *\n * Requirements:\n *\n * - `recipient` cannot be the zero address.\n * - the caller must have a balance of at least `amount`.\n */\n function transfer(address recipient, uint256 amount) public returns (bool) {\n _transfer(_msgSender(), recipient, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-allowance}.\n */\n function allowance(address owner, address spender) public view returns (uint256) {\n return _allowances[owner][spender];\n }\n\n /**\n * @dev See {IERC20-approve}.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function approve(address spender, uint256 amount) public returns (bool) {\n _approve(_msgSender(), spender, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-transferFrom}.\n *\n * Emits an {Approval} event indicating the updated allowance. This is not\n * required by the EIP. See the note at the beginning of {ERC20};\n *\n * 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`.\n */\n function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {\n _transfer(sender, recipient, amount);\n _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, \"ERC20: transfer amount exceeds allowance\"));\n return true;\n }\n\n /**\n * @dev Atomically increases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {\n _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));\n return true;\n }\n\n /**\n * @dev Atomically decreases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `spender` must have allowance for the caller of at least\n * `subtractedValue`.\n */\n function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {\n _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, \"ERC20: decreased allowance below zero\"));\n return true;\n }\n\n /**\n * @dev Moves tokens `amount` from `sender` to `recipient`.\n *\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 *\n * Emits a {Transfer} event.\n *\n * Requirements:\n *\n * - `sender` cannot be the zero address.\n * - `recipient` cannot be the zero address.\n * - `sender` must have a balance of at least `amount`.\n */\n function _transfer(address sender, address recipient, uint256 amount) internal {\n require(sender != address(0), \"ERC20: transfer from the zero address\");\n require(recipient != address(0), \"ERC20: transfer to the zero address\");\n\n _balances[sender] = _balances[sender].sub(amount, \"ERC20: transfer amount exceeds balance\");\n _balances[recipient] = _balances[recipient].add(amount);\n emit Transfer(sender, recipient, amount);\n }\n\n /** @dev Creates `amount` tokens and assigns them to `account`, increasing\n * the total supply.\n *\n * Emits a {Transfer} event with `from` set to the zero address.\n *\n * Requirements\n *\n * - `to` cannot be the zero address.\n */\n function _mint(address account, uint256 amount) internal {\n require(account != address(0), \"ERC20: mint to the zero address\");\n\n _totalSupply = _totalSupply.add(amount);\n _balances[account] = _balances[account].add(amount);\n emit Transfer(address(0), account, amount);\n }\n\n /**\n * @dev Destroys `amount` tokens from `account`, reducing the\n * total supply.\n *\n * Emits a {Transfer} event with `to` set to the zero address.\n *\n * Requirements\n *\n * - `account` cannot be the zero address.\n * - `account` must have at least `amount` tokens.\n */\n function _burn(address account, uint256 amount) internal {\n require(account != address(0), \"ERC20: burn from the zero address\");\n\n _balances[account] = _balances[account].sub(amount, \"ERC20: burn amount exceeds balance\");\n _totalSupply = _totalSupply.sub(amount);\n emit Transfer(account, address(0), amount);\n }\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.\n *\n * This is internal function is equivalent to `approve`, and can be used to\n * e.g. set automatic allowances for certain subsystems, etc.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `owner` cannot be the zero address.\n * - `spender` cannot be the zero address.\n */\n function _approve(address owner, address spender, uint256 amount) internal {\n require(owner != address(0), \"ERC20: approve from the zero address\");\n require(spender != address(0), \"ERC20: approve to the zero address\");\n\n _allowances[owner][spender] = amount;\n emit Approval(owner, spender, amount);\n }\n\n /**\n * @dev Destroys `amount` tokens from `account`.`amount` is then deducted\n * from the caller's allowance.\n *\n * See {_burn} and {_approve}.\n */\n function _burnFrom(address account, uint256 amount) internal {\n _burn(account, amount);\n _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, \"ERC20: burn amount exceeds allowance\"));\n }\n}\n", "sourcePath": "@openzeppelin/contracts/token/ERC20/ERC20.sol", "ast": { "absolutePath": "@openzeppelin/contracts/token/ERC20/ERC20.sol", "exportedSymbols": { "ERC20": [ 7655 ] }, "id": 7656, "nodeType": "SourceUnit", "nodes": [ { "id": 7252, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:27" }, { "absolutePath": "@openzeppelin/contracts/GSN/Context.sol", "file": "../../GSN/Context.sol", "id": 7253, "nodeType": "ImportDirective", "scope": 7656, "sourceUnit": 7064, "src": "25:31:27", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/IERC20.sol", "file": "./IERC20.sol", "id": 7254, "nodeType": "ImportDirective", "scope": 7656, "sourceUnit": 7783, "src": "57:22:27", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/math/SafeMath.sol", "file": "../../math/SafeMath.sol", "id": 7255, "nodeType": "ImportDirective", "scope": 7656, "sourceUnit": 7251, "src": "80:33:27", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 7256, "name": "Context", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 7063, "src": "1286:7:27", "typeDescriptions": { "typeIdentifier": "t_contract$_Context_$7063", "typeString": "contract Context" } }, "id": 7257, "nodeType": "InheritanceSpecifier", "src": "1286:7:27" }, { "arguments": null, "baseName": { "contractScope": null, "id": 7258, "name": "IERC20", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 7782, "src": "1295:6:27", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$7782", "typeString": "contract IERC20" } }, "id": 7259, "nodeType": "InheritanceSpecifier", "src": "1295:6:27" } ], "contractDependencies": [ 7063, 7782 ], "contractKind": "contract", "documentation": "@dev Implementation of the {IERC20} interface.\n * This implementation is agnostic to the way tokens are created. This means\nthat a supply mechanism has to be added in a derived contract using {_mint}.\nFor a generic mechanism see {ERC20Mintable}.\n * TIP: For a detailed writeup see our guide\nhttps://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\nto implement supply mechanisms].\n * We have followed general OpenZeppelin guidelines: functions revert instead\nof returning `false` on failure. This behavior is nonetheless conventional\nand does not conflict with the expectations of ERC20 applications.\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\nThis allows applications to reconstruct the allowance for all accounts just\nby listening to said events. Other implementations of the EIP may not emit\nthese events, as it isn't required by the specification.\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\nfunctions have been added to mitigate the well-known issues around setting\nallowances. See {IERC20-approve}.", "fullyImplemented": true, "id": 7655, "linearizedBaseContracts": [ 7655, 7782, 7063 ], "name": "ERC20", "nodeType": "ContractDefinition", "nodes": [ { "id": 7262, "libraryName": { "contractScope": null, "id": 7260, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 7250, "src": "1314:8:27", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$7250", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "1308:27:27", "typeName": { "id": 7261, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1327:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "constant": false, "id": 7266, "name": "_balances", "nodeType": "VariableDeclaration", "scope": 7655, "src": "1341:46:27", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, 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"lValueRequested": false, "nodeType": "IndexAccess", "src": "3289:19:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7374, "indexExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7372, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "3309:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7373, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3309:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3289:33:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7375, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "3289:37:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 7378, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3289:89:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7365, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7625, "src": "3258:8:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7379, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3258:121:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7380, "nodeType": "ExpressionStatement", "src": "3258:121:27" }, { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 7381, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3396:4:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 7358, "id": 7382, "nodeType": "Return", "src": "3389:11:27" } ] }, "documentation": "@dev See {IERC20-transferFrom}.\n * Emits an {Approval} event indicating the updated allowance. This is not\nrequired 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`.", "id": 7384, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 7355, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7350, "name": "sender", "nodeType": "VariableDeclaration", "scope": 7384, "src": "3129:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7349, "name": "address", "nodeType": "ElementaryTypeName", "src": "3129:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7352, "name": "recipient", "nodeType": "VariableDeclaration", "scope": 7384, "src": "3145:17:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7351, "name": "address", "nodeType": "ElementaryTypeName", "src": "3145:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7354, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7384, "src": "3164:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7353, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3164:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3128:51:27" }, "returnParameters": { "id": 7358, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7357, "name": "", "nodeType": "VariableDeclaration", "scope": 7384, "src": "3196:4:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 7356, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3196:4:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "3195:6:27" }, "scope": 7655, "src": "3107:300:27", "stateMutability": "nonpayable", "superFunction": 7765, "visibility": "public" }, { "body": { "id": 7410, "nodeType": "Block", "src": "3888:121:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7394, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "3907:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7395, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3907:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 7396, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7386, "src": "3921:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7404, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7388, "src": "3969:10:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7397, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "3930:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7400, "indexExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7398, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "3942:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7399, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3942:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3930:25:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7402, "indexExpression": { "argumentTypes": null, "id": 7401, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7386, "src": "3956:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3930:34:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7403, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 7090, "src": "3930:38:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7405, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3930:50:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7393, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7625, "src": "3898:8:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7406, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3898:83:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7407, "nodeType": "ExpressionStatement", "src": "3898:83:27" }, { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 7408, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3998:4:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 7392, "id": 7409, "nodeType": "Return", "src": "3991:11:27" } ] }, "documentation": "@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\nproblems described in {IERC20-approve}.\n * Emits an {Approval} event indicating the updated allowance.\n * Requirements:\n * - `spender` cannot be the zero address.", "id": 7411, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 7389, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7386, "name": "spender", "nodeType": "VariableDeclaration", "scope": 7411, "src": "3829:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7385, "name": "address", "nodeType": "ElementaryTypeName", "src": "3829:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7388, "name": "addedValue", "nodeType": "VariableDeclaration", "scope": 7411, "src": "3846:18:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7387, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3846:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3828:37:27" }, "returnParameters": { "id": 7392, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7391, "name": "", "nodeType": "VariableDeclaration", "scope": 7411, "src": "3882:4:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 7390, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3882:4:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "3881:6:27" }, "scope": 7655, "src": "3802:207:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 7438, "nodeType": "Block", "src": "4587:167:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7421, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "4606:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7422, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4606:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 7423, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7413, "src": "4620:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7431, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7415, "src": "4668:15:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 7432, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4685:39:27", "subdenomination": null, "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": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7424, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "4629:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7427, "indexExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7425, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "4641:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7426, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4641:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4629:25:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7429, "indexExpression": { "argumentTypes": null, "id": 7428, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7413, "src": "4655:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4629:34:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7430, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "4629:38:27", "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": 7433, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4629:96:27", "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": 7420, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7625, "src": "4597:8:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7434, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4597:129:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7435, "nodeType": "ExpressionStatement", "src": "4597:129:27" }, { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 7436, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4743:4:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 7419, "id": 7437, "nodeType": "Return", "src": "4736:11:27" } ] }, "documentation": "@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\nproblems 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`.", "id": 7439, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 7416, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7413, "name": "spender", "nodeType": "VariableDeclaration", "scope": 7439, "src": "4523:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7412, "name": "address", "nodeType": "ElementaryTypeName", "src": "4523:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7415, "name": "subtractedValue", "nodeType": "VariableDeclaration", "scope": 7439, "src": "4540:23:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7414, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4540:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4522:42:27" }, "returnParameters": { "id": 7419, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7418, "name": "", "nodeType": "VariableDeclaration", "scope": 7439, "src": "4581:4:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 7417, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4581:4:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "4580:6:27" }, "scope": 7655, "src": "4496:258:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 7495, "nodeType": "Block", "src": "5307:385:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7453, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7449, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7441, "src": "5325:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7451, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5343:1:27", "subdenomination": null, "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": 7450, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5335:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7452, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5335:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "5325:20:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a207472616e736665722066726f6d20746865207a65726f2061646472657373", "id": 7454, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5347:39:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" }, "value": "ERC20: transfer from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" } ], "id": 7448, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "5317:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7455, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5317:70:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7456, "nodeType": "ExpressionStatement", "src": "5317:70:27" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7462, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7458, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7443, "src": "5405:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7460, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5426:1:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 7459, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5418:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7461, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5418:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "5405:23:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 7463, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5430:37:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" }, "value": "ERC20: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" } ], "id": 7457, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "5397:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7464, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5397:71:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7465, "nodeType": "ExpressionStatement", "src": "5397:71:27" }, { "expression": { "argumentTypes": null, "id": 7476, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7466, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "5479:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7468, "indexExpression": { "argumentTypes": null, "id": 7467, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7441, "src": "5489:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "5479:17:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7473, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7445, "src": "5521:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "45524332303a207472616e7366657220616d6f756e7420657863656564732062616c616e6365", "id": 7474, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5529:40:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" }, "value": "ERC20: transfer amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7469, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "5499:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7471, "indexExpression": { "argumentTypes": null, "id": 7470, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7441, "src": "5509:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5499:17:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7472, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "5499:21:27", "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": 7475, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5499:71:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "5479:91:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7477, "nodeType": "ExpressionStatement", "src": "5479:91:27" }, { "expression": { "argumentTypes": null, "id": 7487, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7478, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "5580:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7480, "indexExpression": { "argumentTypes": null, "id": 7479, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7443, "src": "5590:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "5580:20:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7485, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7445, "src": "5628:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7481, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "5603:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7483, "indexExpression": { "argumentTypes": null, "id": 7482, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7443, "src": "5613:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5603:20:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7484, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 7090, "src": "5603:24:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7486, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5603:32:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "5580:55:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7488, "nodeType": "ExpressionStatement", "src": "5580:55:27" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7490, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7441, "src": "5659:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7491, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7443, "src": "5667:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7492, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7445, "src": "5678:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7489, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7773, "src": "5650:8:27", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7493, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5650:35:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7494, "nodeType": "EmitStatement", "src": "5645:40:27" } ] }, "documentation": "@dev Moves tokens `amount` from `sender` to `recipient`.\n * This is internal function is equivalent to {transfer}, and can be used to\ne.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`.", "id": 7496, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 7446, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7441, "name": "sender", "nodeType": "VariableDeclaration", "scope": 7496, "src": "5247:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7440, "name": "address", "nodeType": "ElementaryTypeName", "src": "5247:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7443, "name": "recipient", "nodeType": "VariableDeclaration", "scope": 7496, "src": "5263:17:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7442, "name": "address", "nodeType": "ElementaryTypeName", "src": "5263:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7445, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7496, "src": "5282:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7444, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5282:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5246:51:27" }, "returnParameters": { "id": 7447, "nodeType": "ParameterList", "parameters": [], "src": "5307:0:27" }, "scope": 7655, "src": "5228:464:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 7538, "nodeType": "Block", "src": "6019:245:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7508, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7504, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7498, "src": "6037:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7506, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6056:1:27", "subdenomination": null, "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": 7505, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6048:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7507, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6048:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "6037:21:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a206d696e7420746f20746865207a65726f2061646472657373", "id": 7509, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6060:33:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" }, "value": "ERC20: mint to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" } ], "id": 7503, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "6029:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7510, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6029:65:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7511, "nodeType": "ExpressionStatement", "src": "6029:65:27" }, { "expression": { "argumentTypes": null, "id": 7517, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 7512, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7274, "src": "6105:12:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7515, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7500, "src": "6137:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 7513, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7274, "src": "6120:12:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7514, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 7090, "src": "6120:16:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7516, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6120:24:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6105:39:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7518, "nodeType": "ExpressionStatement", "src": "6105:39:27" }, { "expression": { "argumentTypes": null, "id": 7528, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7519, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "6154:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7521, "indexExpression": { "argumentTypes": null, "id": 7520, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7498, "src": "6164:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "6154:18:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7526, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7500, "src": "6198:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7522, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "6175:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7524, "indexExpression": { "argumentTypes": null, "id": 7523, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7498, "src": "6185:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6175:18:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7525, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 7090, "src": "6175:22:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7527, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6175:30:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6154:51:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7529, "nodeType": "ExpressionStatement", "src": "6154:51:27" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7532, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6237:1:27", "subdenomination": null, "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": 7531, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6229:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7533, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6229:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 7534, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7498, "src": "6241:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7535, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7500, "src": "6250:6:27", "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": 7530, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7773, "src": "6220:8:27", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7536, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6220:37:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7537, "nodeType": "EmitStatement", "src": "6215:42:27" } ] }, "documentation": "@dev Creates `amount` tokens and assigns them to `account`, increasing\nthe total supply.\n * Emits a {Transfer} event with `from` set to the zero address.\n * Requirements\n * - `to` cannot be the zero address.", "id": 7539, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nodeType": "FunctionDefinition", "parameters": { "id": 7501, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7498, "name": "account", "nodeType": "VariableDeclaration", "scope": 7539, "src": "5977:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7497, "name": "address", "nodeType": "ElementaryTypeName", "src": "5977:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7500, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7539, "src": "5994:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7499, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5994:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5976:33:27" }, "returnParameters": { "id": 7502, "nodeType": "ParameterList", "parameters": [], "src": "6019:0:27" }, "scope": 7655, "src": "5962:302:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 7582, "nodeType": "Block", "src": "6640:285:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7551, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7547, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7541, "src": "6658:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7549, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6677:1:27", "subdenomination": null, "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": 7548, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6669:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7550, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6669:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "6658:21:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a206275726e2066726f6d20746865207a65726f2061646472657373", "id": 7552, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6681:35:27", "subdenomination": null, "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": 7546, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "6650:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7553, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6650:67:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7554, "nodeType": "ExpressionStatement", "src": "6650:67:27" }, { "expression": { "argumentTypes": null, "id": 7565, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7555, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "6728:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7557, "indexExpression": { "argumentTypes": null, "id": 7556, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7541, "src": "6738:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "6728:18:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7562, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7543, "src": "6772:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "45524332303a206275726e20616d6f756e7420657863656564732062616c616e6365", "id": 7563, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6780:36:27", "subdenomination": null, "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": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7558, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "6749:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7560, "indexExpression": { "argumentTypes": null, "id": 7559, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7541, "src": "6759:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6749:18:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7561, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "6749:22:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 7564, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6749:68:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6728:89:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7566, "nodeType": "ExpressionStatement", "src": "6728:89:27" }, { "expression": { "argumentTypes": null, "id": 7572, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 7567, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7274, "src": "6827:12:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7570, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7543, "src": "6859:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 7568, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7274, "src": "6842:12:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7569, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7106, "src": "6842:16:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7571, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6842:24:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6827:39:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7573, "nodeType": "ExpressionStatement", "src": "6827:39:27" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7575, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7541, "src": "6890:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7577, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6907:1:27", "subdenomination": null, "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": 7576, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6899:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7578, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6899:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 7579, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7543, "src": "6911:6:27", "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": 7574, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7773, "src": "6881:8:27", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7580, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6881:37:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7581, "nodeType": "EmitStatement", "src": "6876:42:27" } ] }, "documentation": "@dev Destroys `amount` tokens from `account`, reducing the\ntotal supply.\n * Emits a {Transfer} event with `to` set to the zero address.\n * Requirements\n * - `account` cannot be the zero address.\n- `account` must have at least `amount` tokens.", "id": 7583, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 7544, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7541, "name": "account", "nodeType": "VariableDeclaration", "scope": 7583, "src": "6598:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7540, "name": "address", "nodeType": "ElementaryTypeName", "src": "6598:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7543, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7583, "src": "6615:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7542, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6615:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "6597:33:27" }, "returnParameters": { "id": 7545, "nodeType": "ParameterList", "parameters": [], "src": "6640:0:27" }, "scope": 7655, "src": "6583:342:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 7624, "nodeType": "Block", "src": "7425:257:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7597, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7593, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7585, "src": "7443:5:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7595, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7460:1:27", "subdenomination": null, "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": 7594, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7452:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7596, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7452:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "7443:19:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 7598, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7464:38:27", "subdenomination": null, "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": 7592, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "7435:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7599, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7435:68:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7600, "nodeType": "ExpressionStatement", "src": "7435:68:27" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7606, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7602, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7587, "src": "7521:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7604, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7540:1:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 7603, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7532:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7605, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7532:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "7521:21:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 7607, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7544:36:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 7601, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "7513:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7608, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7513:68:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7609, "nodeType": "ExpressionStatement", "src": "7513:68:27" }, { "expression": { "argumentTypes": null, "id": 7616, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7610, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "7592:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7613, "indexExpression": { "argumentTypes": null, "id": 7611, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7585, "src": "7604:5:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7592:18:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7614, "indexExpression": { "argumentTypes": null, "id": 7612, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7587, "src": "7611:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "7592:27:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 7615, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7589, "src": "7622:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7592:36:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7617, "nodeType": "ExpressionStatement", "src": "7592:36:27" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7619, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7585, "src": "7652:5:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7620, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7587, "src": "7659:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7621, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7589, "src": "7668:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7618, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7781, "src": "7643:8:27", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7622, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7643:32:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7623, "nodeType": "EmitStatement", "src": "7638:37:27" } ] }, "documentation": "@dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.\n * This is internal function is equivalent to `approve`, and can be used to\ne.g. set automatic allowances for certain subsystems, etc.\n * Emits an {Approval} event.\n * Requirements:\n * - `owner` cannot be the zero address.\n- `spender` cannot be the zero address.", "id": 7625, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nodeType": "FunctionDefinition", "parameters": { "id": 7590, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7585, "name": "owner", "nodeType": "VariableDeclaration", "scope": 7625, "src": "7368:13:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7584, "name": "address", "nodeType": "ElementaryTypeName", "src": "7368:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7587, "name": "spender", "nodeType": "VariableDeclaration", "scope": 7625, "src": "7383:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7586, "name": "address", "nodeType": "ElementaryTypeName", "src": "7383:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7589, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7625, "src": "7400:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7588, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7400:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7367:48:27" }, "returnParameters": { "id": 7591, "nodeType": "ParameterList", "parameters": [], "src": "7425:0:27" }, "scope": 7655, "src": "7350:332:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 7653, "nodeType": "Block", "src": "7921:168:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7633, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7627, "src": "7937:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7634, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7629, "src": "7946:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7632, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7583, "src": "7931:5:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 7635, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7931:22:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7636, "nodeType": "ExpressionStatement", "src": "7931:22:27" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7638, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7627, "src": "7972:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7639, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "7981:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7640, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7981:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7648, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7629, "src": "8034:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "45524332303a206275726e20616d6f756e74206578636565647320616c6c6f77616e6365", "id": 7649, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8042:38:27", "subdenomination": null, "typeDescriptions": { "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, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7641, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "7995:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7643, "indexExpression": { "argumentTypes": null, "id": 7642, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7627, "src": "8007:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7995:20:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7646, "indexExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7644, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "8016:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7645, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8016:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7995:34:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7647, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "7995:38:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 7650, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7995:86:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7637, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7625, "src": "7963:8:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7651, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7963:119:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7652, "nodeType": "ExpressionStatement", "src": "7963:119:27" } ] }, "documentation": "@dev Destroys `amount` tokens from `account`.`amount` is then deducted\nfrom the caller's allowance.\n * See {_burn} and {_approve}.", "id": 7654, "implemented": true, "kind": "function", "modifiers": [], "name": "_burnFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 7630, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7627, "name": "account", "nodeType": "VariableDeclaration", "scope": 7654, "src": "7879:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7626, "name": "address", "nodeType": "ElementaryTypeName", "src": "7879:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7629, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7654, "src": "7896:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7628, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7896:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7878:33:27" }, "returnParameters": { "id": 7631, "nodeType": "ParameterList", "parameters": [], "src": "7921:0:27" }, "scope": 7655, "src": "7860:229:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" } ], "scope": 7656, "src": "1268:6823:27" } ], "src": "0:8092:27" }, "legacyAST": { "absolutePath": "@openzeppelin/contracts/token/ERC20/ERC20.sol", "exportedSymbols": { "ERC20": [ 7655 ] }, "id": 7656, "nodeType": "SourceUnit", "nodes": [ { "id": 7252, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:27" }, { "absolutePath": "@openzeppelin/contracts/GSN/Context.sol", "file": "../../GSN/Context.sol", "id": 7253, "nodeType": "ImportDirective", "scope": 7656, "sourceUnit": 7064, "src": "25:31:27", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/IERC20.sol", "file": "./IERC20.sol", "id": 7254, "nodeType": "ImportDirective", "scope": 7656, "sourceUnit": 7783, "src": "57:22:27", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/math/SafeMath.sol", "file": "../../math/SafeMath.sol", "id": 7255, "nodeType": "ImportDirective", "scope": 7656, "sourceUnit": 7251, "src": "80:33:27", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 7256, "name": "Context", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 7063, "src": "1286:7:27", "typeDescriptions": { "typeIdentifier": "t_contract$_Context_$7063", "typeString": "contract Context" } }, "id": 7257, "nodeType": "InheritanceSpecifier", "src": "1286:7:27" }, { "arguments": null, "baseName": { "contractScope": null, "id": 7258, "name": "IERC20", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 7782, "src": "1295:6:27", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$7782", "typeString": "contract IERC20" } }, "id": 7259, "nodeType": "InheritanceSpecifier", "src": "1295:6:27" } ], "contractDependencies": [ 7063, 7782 ], "contractKind": "contract", "documentation": "@dev Implementation of the {IERC20} interface.\n * This implementation is agnostic to the way tokens are created. This means\nthat a supply mechanism has to be added in a derived contract using {_mint}.\nFor a generic mechanism see {ERC20Mintable}.\n * TIP: For a detailed writeup see our guide\nhttps://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\nto implement supply mechanisms].\n * We have followed general OpenZeppelin guidelines: functions revert instead\nof returning `false` on failure. This behavior is nonetheless conventional\nand does not conflict with the expectations of ERC20 applications.\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\nThis allows applications to reconstruct the allowance for all accounts just\nby listening to said events. Other implementations of the EIP may not emit\nthese events, as it isn't required by the specification.\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\nfunctions have been added to mitigate the well-known issues around setting\nallowances. See {IERC20-approve}.", "fullyImplemented": true, "id": 7655, "linearizedBaseContracts": [ 7655, 7782, 7063 ], "name": "ERC20", "nodeType": "ContractDefinition", "nodes": [ { "id": 7262, "libraryName": { "contractScope": null, "id": 7260, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 7250, "src": "1314:8:27", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$7250", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "1308:27:27", "typeName": { "id": 7261, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1327:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "constant": false, "id": 7266, "name": "_balances", "nodeType": "VariableDeclaration", "scope": 7655, "src": "1341:46:27", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 7265, "keyType": { "id": 7263, "name": "address", "nodeType": "ElementaryTypeName", "src": "1350:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1341:28:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 7264, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1361:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "value": null, "visibility": "private" }, { "constant": false, "id": 7272, "name": "_allowances", "nodeType": "VariableDeclaration", "scope": 7655, "src": "1394:69:27", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "typeName": { "id": 7271, "keyType": { "id": 7267, "name": "address", "nodeType": "ElementaryTypeName", "src": "1403:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1394:49:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "valueType": { "id": 7270, "keyType": { "id": 7268, "name": "address", "nodeType": "ElementaryTypeName", "src": "1423:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1414:28:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 7269, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1434:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } } }, "value": null, "visibility": "private" }, { "constant": false, "id": 7274, "name": "_totalSupply", "nodeType": "VariableDeclaration", "scope": 7655, "src": "1470:28:27", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7273, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1470:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "private" }, { "body": { "id": 7281, "nodeType": "Block", "src": "1612:36:27", "statements": [ { "expression": { "argumentTypes": null, "id": 7279, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7274, "src": "1629:12:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 7278, "id": 7280, "nodeType": "Return", "src": "1622:19:27" } ] }, "documentation": "@dev See {IERC20-totalSupply}.", "id": 7282, "implemented": true, "kind": 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"modifiers": [], "name": "balanceOf", "nodeType": "FunctionDefinition", "parameters": { "id": 7285, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7284, "name": "account", "nodeType": "VariableDeclaration", "scope": 7294, "src": "1725:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7283, "name": "address", "nodeType": "ElementaryTypeName", "src": "1725:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "1724:17:27" }, "returnParameters": { "id": 7288, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7287, "name": "", "nodeType": "VariableDeclaration", "scope": 7294, "src": "1763:7:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": 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"lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2112:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 7306, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7296, "src": "2126:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7307, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7298, "src": "2137:6:27", "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": 7303, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], 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"documentation": "@dev See {IERC20-transfer}.\n * Requirements:\n * - `recipient` cannot be the zero address.\n- the caller must have a balance of at least `amount`.", "id": 7313, "implemented": true, "kind": "function", "modifiers": [], "name": "transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 7299, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7296, "name": "recipient", "nodeType": "VariableDeclaration", "scope": 7313, "src": "2035:17:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7295, "name": "address", "nodeType": "ElementaryTypeName", "src": "2035:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7298, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7313, "src": 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"stateMutability": "nonpayable", "superFunction": 7736, "visibility": "public" }, { "body": { "id": 7328, "nodeType": "Block", "src": "2311:51:27", "statements": [ { "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7322, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "2328:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7324, "indexExpression": { "argumentTypes": null, "id": 7323, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7315, "src": "2340:5:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": 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"id": 7335, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2566:4:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "2565:6:27" }, "scope": 7655, "src": "2500:149:27", "stateMutability": "nonpayable", "superFunction": 7754, "visibility": "public" }, { "body": { "id": 7383, "nodeType": "Block", "src": "3202:205:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7360, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7350, "src": "3222:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7361, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7352, "src": "3230:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7362, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7354, "src": "3241:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7359, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7496, "src": "3212:9:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7363, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3212:36:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7364, "nodeType": "ExpressionStatement", "src": "3212:36:27" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7366, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7350, "src": "3267:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7367, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "3275:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7368, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3275:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7376, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7354, "src": "3327:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "45524332303a207472616e7366657220616d6f756e74206578636565647320616c6c6f77616e6365", "id": 7377, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3335:42:27", "subdenomination": null, "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": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7369, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "3289:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7371, "indexExpression": { "argumentTypes": null, "id": 7370, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7350, "src": "3301:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3289:19:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7374, "indexExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7372, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "3309:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7373, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3309:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3289:33:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7375, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "3289:37:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 7378, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3289:89:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7365, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7625, "src": "3258:8:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7379, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3258:121:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7380, "nodeType": "ExpressionStatement", "src": "3258:121:27" }, { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 7381, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3396:4:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 7358, "id": 7382, "nodeType": "Return", "src": "3389:11:27" } ] }, "documentation": "@dev See {IERC20-transferFrom}.\n * Emits an {Approval} event indicating the updated allowance. This is not\nrequired 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`.", "id": 7384, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 7355, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7350, "name": "sender", "nodeType": "VariableDeclaration", "scope": 7384, "src": "3129:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7349, "name": "address", "nodeType": "ElementaryTypeName", "src": "3129:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7352, "name": "recipient", "nodeType": "VariableDeclaration", "scope": 7384, "src": "3145:17:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7351, "name": "address", "nodeType": "ElementaryTypeName", "src": "3145:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7354, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7384, "src": "3164:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7353, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3164:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3128:51:27" }, "returnParameters": { "id": 7358, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7357, "name": "", "nodeType": "VariableDeclaration", "scope": 7384, "src": "3196:4:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 7356, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3196:4:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "3195:6:27" }, "scope": 7655, "src": "3107:300:27", "stateMutability": "nonpayable", "superFunction": 7765, "visibility": "public" }, { "body": { "id": 7410, "nodeType": "Block", "src": "3888:121:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7394, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "3907:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7395, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3907:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 7396, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7386, "src": "3921:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7404, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7388, "src": "3969:10:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7397, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "3930:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7400, "indexExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7398, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "3942:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7399, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3942:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3930:25:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7402, "indexExpression": { "argumentTypes": null, "id": 7401, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7386, "src": "3956:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3930:34:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7403, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 7090, "src": "3930:38:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7405, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3930:50:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7393, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7625, "src": "3898:8:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7406, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3898:83:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7407, "nodeType": "ExpressionStatement", "src": "3898:83:27" }, { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 7408, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3998:4:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 7392, "id": 7409, "nodeType": "Return", "src": "3991:11:27" } ] }, "documentation": "@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\nproblems described in {IERC20-approve}.\n * Emits an {Approval} event indicating the updated allowance.\n * Requirements:\n * - `spender` cannot be the zero address.", "id": 7411, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 7389, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7386, "name": "spender", "nodeType": "VariableDeclaration", "scope": 7411, "src": "3829:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7385, "name": "address", "nodeType": "ElementaryTypeName", "src": "3829:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7388, "name": "addedValue", "nodeType": "VariableDeclaration", "scope": 7411, "src": "3846:18:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7387, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3846:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3828:37:27" }, "returnParameters": { "id": 7392, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7391, "name": "", "nodeType": "VariableDeclaration", "scope": 7411, "src": "3882:4:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 7390, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3882:4:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "3881:6:27" }, "scope": 7655, "src": "3802:207:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 7438, "nodeType": "Block", "src": "4587:167:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7421, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "4606:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7422, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4606:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 7423, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7413, "src": "4620:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7431, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7415, "src": "4668:15:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 7432, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4685:39:27", "subdenomination": null, "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": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7424, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "4629:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7427, "indexExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7425, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "4641:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7426, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4641:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4629:25:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7429, "indexExpression": { "argumentTypes": null, "id": 7428, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7413, "src": "4655:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4629:34:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7430, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "4629:38:27", "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": 7433, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4629:96:27", "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": 7420, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7625, "src": "4597:8:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7434, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4597:129:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7435, "nodeType": "ExpressionStatement", "src": "4597:129:27" }, { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 7436, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4743:4:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 7419, "id": 7437, "nodeType": "Return", "src": "4736:11:27" } ] }, "documentation": "@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\nproblems 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`.", "id": 7439, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 7416, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7413, "name": "spender", "nodeType": "VariableDeclaration", "scope": 7439, "src": "4523:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7412, "name": "address", "nodeType": "ElementaryTypeName", "src": "4523:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7415, "name": "subtractedValue", "nodeType": "VariableDeclaration", "scope": 7439, "src": "4540:23:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7414, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4540:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4522:42:27" }, "returnParameters": { "id": 7419, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7418, "name": "", "nodeType": "VariableDeclaration", "scope": 7439, "src": "4581:4:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 7417, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4581:4:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "4580:6:27" }, "scope": 7655, "src": "4496:258:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 7495, "nodeType": "Block", "src": "5307:385:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7453, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7449, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7441, "src": "5325:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7451, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5343:1:27", "subdenomination": null, "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": 7450, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5335:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7452, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5335:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "5325:20:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a207472616e736665722066726f6d20746865207a65726f2061646472657373", "id": 7454, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5347:39:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" }, "value": "ERC20: transfer from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" } ], "id": 7448, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "5317:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7455, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5317:70:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7456, "nodeType": "ExpressionStatement", "src": "5317:70:27" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7462, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7458, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7443, "src": "5405:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7460, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5426:1:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 7459, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5418:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7461, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5418:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "5405:23:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 7463, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5430:37:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" }, "value": "ERC20: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" } ], "id": 7457, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "5397:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7464, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5397:71:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7465, "nodeType": "ExpressionStatement", "src": "5397:71:27" }, { "expression": { "argumentTypes": null, "id": 7476, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7466, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "5479:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7468, "indexExpression": { "argumentTypes": null, "id": 7467, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7441, "src": "5489:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "5479:17:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7473, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7445, "src": "5521:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "45524332303a207472616e7366657220616d6f756e7420657863656564732062616c616e6365", "id": 7474, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5529:40:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" }, "value": "ERC20: transfer amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7469, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "5499:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7471, "indexExpression": { "argumentTypes": null, "id": 7470, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7441, "src": "5509:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5499:17:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7472, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "5499:21:27", "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": 7475, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5499:71:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "5479:91:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7477, "nodeType": "ExpressionStatement", "src": "5479:91:27" }, { "expression": { "argumentTypes": null, "id": 7487, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7478, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "5580:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7480, "indexExpression": { "argumentTypes": null, "id": 7479, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7443, "src": "5590:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "5580:20:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7485, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7445, "src": "5628:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7481, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "5603:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7483, "indexExpression": { "argumentTypes": null, "id": 7482, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7443, "src": "5613:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5603:20:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7484, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 7090, "src": "5603:24:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7486, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5603:32:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "5580:55:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7488, "nodeType": "ExpressionStatement", "src": "5580:55:27" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7490, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7441, "src": "5659:6:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7491, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7443, "src": "5667:9:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7492, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7445, "src": "5678:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7489, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7773, "src": "5650:8:27", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7493, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5650:35:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7494, "nodeType": "EmitStatement", "src": "5645:40:27" } ] }, "documentation": "@dev Moves tokens `amount` from `sender` to `recipient`.\n * This is internal function is equivalent to {transfer}, and can be used to\ne.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`.", "id": 7496, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 7446, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7441, "name": "sender", "nodeType": "VariableDeclaration", "scope": 7496, "src": "5247:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7440, "name": "address", "nodeType": "ElementaryTypeName", "src": "5247:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7443, "name": "recipient", "nodeType": "VariableDeclaration", "scope": 7496, "src": "5263:17:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7442, "name": "address", "nodeType": "ElementaryTypeName", "src": "5263:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7445, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7496, "src": "5282:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7444, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5282:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5246:51:27" }, "returnParameters": { "id": 7447, "nodeType": "ParameterList", "parameters": [], "src": "5307:0:27" }, "scope": 7655, "src": "5228:464:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 7538, "nodeType": "Block", "src": "6019:245:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7508, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7504, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7498, "src": "6037:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7506, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6056:1:27", "subdenomination": null, "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": 7505, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6048:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7507, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6048:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "6037:21:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a206d696e7420746f20746865207a65726f2061646472657373", "id": 7509, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6060:33:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" }, "value": "ERC20: mint to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" } ], "id": 7503, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "6029:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7510, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6029:65:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7511, "nodeType": "ExpressionStatement", "src": "6029:65:27" }, { "expression": { "argumentTypes": null, "id": 7517, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 7512, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7274, "src": "6105:12:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7515, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7500, "src": "6137:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 7513, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7274, "src": "6120:12:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7514, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 7090, "src": "6120:16:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7516, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6120:24:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6105:39:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7518, "nodeType": "ExpressionStatement", "src": "6105:39:27" }, { "expression": { "argumentTypes": null, "id": 7528, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7519, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "6154:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7521, "indexExpression": { "argumentTypes": null, "id": 7520, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7498, "src": "6164:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "6154:18:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7526, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7500, "src": "6198:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7522, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "6175:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7524, "indexExpression": { "argumentTypes": null, "id": 7523, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7498, "src": "6185:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6175:18:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7525, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 7090, "src": "6175:22:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7527, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6175:30:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6154:51:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7529, "nodeType": "ExpressionStatement", "src": "6154:51:27" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7532, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6237:1:27", "subdenomination": null, "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": 7531, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6229:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7533, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6229:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 7534, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7498, "src": "6241:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7535, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7500, "src": "6250:6:27", "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": 7530, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7773, "src": "6220:8:27", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7536, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6220:37:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7537, "nodeType": "EmitStatement", "src": "6215:42:27" } ] }, "documentation": "@dev Creates `amount` tokens and assigns them to `account`, increasing\nthe total supply.\n * Emits a {Transfer} event with `from` set to the zero address.\n * Requirements\n * - `to` cannot be the zero address.", "id": 7539, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nodeType": "FunctionDefinition", "parameters": { "id": 7501, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7498, "name": "account", "nodeType": "VariableDeclaration", "scope": 7539, "src": "5977:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7497, "name": "address", "nodeType": "ElementaryTypeName", "src": "5977:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7500, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7539, "src": "5994:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7499, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5994:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5976:33:27" }, "returnParameters": { "id": 7502, "nodeType": "ParameterList", "parameters": [], "src": "6019:0:27" }, "scope": 7655, "src": "5962:302:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 7582, "nodeType": "Block", "src": "6640:285:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7551, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7547, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7541, "src": "6658:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7549, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6677:1:27", "subdenomination": null, "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": 7548, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6669:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7550, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6669:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "6658:21:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a206275726e2066726f6d20746865207a65726f2061646472657373", "id": 7552, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6681:35:27", "subdenomination": null, "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": 7546, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "6650:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7553, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6650:67:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7554, "nodeType": "ExpressionStatement", "src": "6650:67:27" }, { "expression": { "argumentTypes": null, "id": 7565, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7555, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "6728:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7557, "indexExpression": { "argumentTypes": null, "id": 7556, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7541, "src": "6738:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "6728:18:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7562, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7543, "src": "6772:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "45524332303a206275726e20616d6f756e7420657863656564732062616c616e6365", "id": 7563, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6780:36:27", "subdenomination": null, "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": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7558, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7266, "src": "6749:9:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7560, "indexExpression": { "argumentTypes": null, "id": 7559, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7541, "src": "6759:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6749:18:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7561, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "6749:22:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 7564, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6749:68:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6728:89:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7566, "nodeType": "ExpressionStatement", "src": "6728:89:27" }, { "expression": { "argumentTypes": null, "id": 7572, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 7567, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7274, "src": "6827:12:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7570, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7543, "src": "6859:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 7568, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7274, "src": "6842:12:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7569, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7106, "src": "6842:16:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 7571, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6842:24:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6827:39:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7573, "nodeType": "ExpressionStatement", "src": "6827:39:27" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7575, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7541, "src": "6890:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7577, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6907:1:27", "subdenomination": null, "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": 7576, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6899:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7578, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6899:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 7579, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7543, "src": "6911:6:27", "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": 7574, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7773, "src": "6881:8:27", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7580, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6881:37:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7581, "nodeType": "EmitStatement", "src": "6876:42:27" } ] }, "documentation": "@dev Destroys `amount` tokens from `account`, reducing the\ntotal supply.\n * Emits a {Transfer} event with `to` set to the zero address.\n * Requirements\n * - `account` cannot be the zero address.\n- `account` must have at least `amount` tokens.", "id": 7583, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 7544, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7541, "name": "account", "nodeType": "VariableDeclaration", "scope": 7583, "src": "6598:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7540, "name": "address", "nodeType": "ElementaryTypeName", "src": "6598:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7543, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7583, "src": "6615:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7542, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6615:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "6597:33:27" }, "returnParameters": { "id": 7545, "nodeType": "ParameterList", "parameters": [], "src": "6640:0:27" }, "scope": 7655, "src": "6583:342:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 7624, "nodeType": "Block", "src": "7425:257:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7597, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7593, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7585, "src": "7443:5:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7595, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7460:1:27", "subdenomination": null, "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": 7594, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7452:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7596, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7452:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "7443:19:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 7598, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7464:38:27", "subdenomination": null, "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": 7592, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "7435:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7599, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7435:68:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7600, "nodeType": "ExpressionStatement", "src": "7435:68:27" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 7606, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 7602, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7587, "src": "7521:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 7604, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7540:1:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 7603, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7532:7:27", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 7605, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7532:10:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "7521:21:27", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 7607, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7544:36:27", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 7601, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 8537, 8538 ], "referencedDeclaration": 8538, "src": "7513:7:27", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 7608, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7513:68:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7609, "nodeType": "ExpressionStatement", "src": "7513:68:27" }, { "expression": { "argumentTypes": null, "id": 7616, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7610, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "7592:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7613, "indexExpression": { "argumentTypes": null, "id": 7611, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7585, "src": "7604:5:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7592:18:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7614, "indexExpression": { "argumentTypes": null, "id": 7612, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7587, "src": "7611:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "7592:27:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 7615, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7589, "src": "7622:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7592:36:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7617, "nodeType": "ExpressionStatement", "src": "7592:36:27" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7619, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7585, "src": "7652:5:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7620, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7587, "src": "7659:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7621, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7589, "src": "7668:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7618, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7781, "src": "7643:8:27", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7622, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7643:32:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7623, "nodeType": "EmitStatement", "src": "7638:37:27" } ] }, "documentation": "@dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.\n * This is internal function is equivalent to `approve`, and can be used to\ne.g. set automatic allowances for certain subsystems, etc.\n * Emits an {Approval} event.\n * Requirements:\n * - `owner` cannot be the zero address.\n- `spender` cannot be the zero address.", "id": 7625, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nodeType": "FunctionDefinition", "parameters": { "id": 7590, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7585, "name": "owner", "nodeType": "VariableDeclaration", "scope": 7625, "src": "7368:13:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7584, "name": "address", "nodeType": "ElementaryTypeName", "src": "7368:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7587, "name": "spender", "nodeType": "VariableDeclaration", "scope": 7625, "src": "7383:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7586, "name": "address", "nodeType": "ElementaryTypeName", "src": "7383:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7589, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7625, "src": "7400:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7588, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7400:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7367:48:27" }, "returnParameters": { "id": 7591, "nodeType": "ParameterList", "parameters": [], "src": "7425:0:27" }, "scope": 7655, "src": "7350:332:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 7653, "nodeType": "Block", "src": "7921:168:27", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7633, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7627, "src": "7937:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 7634, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7629, "src": "7946:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7632, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7583, "src": "7931:5:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 7635, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7931:22:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7636, "nodeType": "ExpressionStatement", "src": "7931:22:27" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7638, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7627, "src": "7972:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7639, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "7981:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7640, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7981:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 7648, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7629, "src": "8034:6:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "45524332303a206275726e20616d6f756e74206578636565647320616c6c6f77616e6365", "id": 7649, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8042:38:27", "subdenomination": null, "typeDescriptions": { "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, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 7641, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7272, "src": "7995:11:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 7643, "indexExpression": { "argumentTypes": null, "id": 7642, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7627, "src": "8007:7:27", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7995:20:27", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 7646, "indexExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 7644, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7051, "src": "8016:10:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_payable_$", "typeString": "function () view returns (address payable)" } }, "id": 7645, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8016:12:27", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7995:34:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 7647, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 7133, "src": "7995:38:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 7650, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7995:86:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 7637, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 7625, "src": "7963:8:27", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 7651, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7963:119:27", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 7652, "nodeType": "ExpressionStatement", "src": "7963:119:27" } ] }, "documentation": "@dev Destroys `amount` tokens from `account`.`amount` is then deducted\nfrom the caller's allowance.\n * See {_burn} and {_approve}.", "id": 7654, "implemented": true, "kind": "function", "modifiers": [], "name": "_burnFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 7630, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 7627, "name": "account", "nodeType": "VariableDeclaration", "scope": 7654, "src": "7879:15:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 7626, "name": "address", "nodeType": "ElementaryTypeName", "src": "7879:7:27", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 7629, "name": "amount", "nodeType": "VariableDeclaration", "scope": 7654, "src": "7896:14:27", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 7628, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7896:7:27", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7878:33:27" }, "returnParameters": { "id": 7631, "nodeType": "ParameterList", "parameters": [], "src": "7921:0:27" }, "scope": 7655, "src": "7860:229:27", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" } ], "scope": 7656, "src": "1268:6823:27" } ], "src": "0:8092:27" }, "compiler": { "name": "solc", "version": "0.5.17+commit.d19bba13.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.3.0", "updatedAt": "2020-12-11T05:03:09.359Z", "devdoc": { "details": "Implementation of the {IERC20} interface. * This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20Mintable}. * TIP: For a detailed writeup see our guide https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How to implement supply mechanisms]. * We have followed general OpenZeppelin guidelines: functions revert instead of returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. * Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}.", "methods": { "allowance(address,address)": { "details": "See {IERC20-allowance}." }, "approve(address,uint256)": { "details": "See {IERC20-approve}. * Requirements: * - `spender` cannot be the zero address." }, "balanceOf(address)": { "details": "See {IERC20-balanceOf}." }, "decreaseAllowance(address,uint256)": { "details": "Atomically decreases the allowance granted to `spender` by the caller. * This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. * Emits an {Approval} event indicating the updated allowance. * Requirements: * - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`." }, "increaseAllowance(address,uint256)": { "details": "Atomically increases the allowance granted to `spender` by the caller. * This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. * Emits an {Approval} event indicating the updated allowance. * Requirements: * - `spender` cannot be the zero address." }, "totalSupply()": { "details": "See {IERC20-totalSupply}." }, "transfer(address,uint256)": { "details": "See {IERC20-transfer}. * Requirements: * - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`." }, "transferFrom(address,address,uint256)": { "details": "See {IERC20-transferFrom}. * Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}; * Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for `sender`'s tokens of at least `amount`." } } }, "userdoc": { "methods": {} } }