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"source": "pragma solidity =0.6.6;\n\nimport '../libraries/SafeMath.sol';\n\ncontract DeflatingERC20 {\n using SafeMath for uint;\n\n string public constant name = 'Deflating Test Token';\n string public constant symbol = 'DTT';\n uint8 public constant decimals = 18;\n uint public totalSupply;\n mapping(address => uint) public balanceOf;\n mapping(address => mapping(address => uint)) public allowance;\n\n bytes32 public DOMAIN_SEPARATOR;\n // keccak256(\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\");\n bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;\n mapping(address => uint) public nonces;\n\n event Approval(address indexed owner, address indexed spender, uint value);\n event Transfer(address indexed from, address indexed to, uint value);\n\n constructor(uint _totalSupply) public {\n uint chainId;\n assembly {\n chainId := chainid()\n }\n DOMAIN_SEPARATOR = keccak256(\n abi.encode(\n keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),\n keccak256(bytes(name)),\n keccak256(bytes('1')),\n chainId,\n address(this)\n )\n );\n _mint(msg.sender, _totalSupply);\n }\n\n function _mint(address to, uint value) internal {\n totalSupply = totalSupply.add(value);\n balanceOf[to] = balanceOf[to].add(value);\n emit Transfer(address(0), to, value);\n }\n\n function _burn(address from, uint value) internal {\n balanceOf[from] = balanceOf[from].sub(value);\n totalSupply = totalSupply.sub(value);\n emit Transfer(from, address(0), value);\n }\n\n function _approve(address owner, address spender, uint value) private {\n allowance[owner][spender] = value;\n emit Approval(owner, spender, value);\n }\n\n function _transfer(address from, address to, uint value) private {\n uint burnAmount = value / 100;\n _burn(from, burnAmount);\n uint transferAmount = value.sub(burnAmount);\n balanceOf[from] = balanceOf[from].sub(transferAmount);\n balanceOf[to] = balanceOf[to].add(transferAmount);\n emit Transfer(from, to, transferAmount);\n }\n\n function approve(address spender, uint value) external returns (bool) {\n _approve(msg.sender, spender, value);\n return true;\n }\n\n function transfer(address to, uint value) external returns (bool) {\n _transfer(msg.sender, to, value);\n return true;\n }\n\n function transferFrom(address from, address to, uint value) external returns (bool) {\n if (allowance[from][msg.sender] != uint(-1)) {\n allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);\n }\n _transfer(from, to, value);\n return true;\n }\n\n function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external {\n require(deadline >= block.timestamp, 'EXPIRED');\n bytes32 digest = keccak256(\n abi.encodePacked(\n '\\x19\\x01',\n DOMAIN_SEPARATOR,\n keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))\n )\n );\n address recoveredAddress = ecrecover(digest, v, r, s);\n require(recoveredAddress != address(0) && recoveredAddress == owner, 'INVALID_SIGNATURE');\n _approve(owner, spender, value);\n }\n}\n", "sourcePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/test/DeflatingERC20.sol", "ast": { "absolutePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/test/DeflatingERC20.sol", "exportedSymbols": { "DeflatingERC20": [ 5782 ] }, "id": 5783, "nodeType": "SourceUnit", "nodes": [ { "id": 5369, "literals": [ "solidity", "=", "0.6", ".6" ], "nodeType": "PragmaDirective", "src": "0:23:14" }, { "absolutePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/libraries/SafeMath.sol", "file": "../libraries/SafeMath.sol", "id": 5370, "nodeType": "ImportDirective", "scope": 5783, "sourceUnit": 5368, "src": "25:35:14", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 5782, "linearizedBaseContracts": [ 5782 ], "name": "DeflatingERC20", "nodeType": "ContractDefinition", "nodes": [ { "id": 5373, "libraryName": { "contractScope": null, "id": 5371, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 5367, "src": "98:8:14", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$5367", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "92:24:14", "typeName": { "id": 5372, "name": "uint", "nodeType": "ElementaryTypeName", "src": "111:4:14", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "constant": true, "functionSelector": "06fdde03", "id": 5376, "mutability": "constant", "name": "name", "nodeType": "VariableDeclaration", "overrides": null, "scope": 5782, "src": "122:52:14", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 5374, "name": "string", "nodeType": "ElementaryTypeName", "src": "122:6:14", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "4465666c6174696e67205465737420546f6b656e", "id": 5375, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "152:22:14", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_f89e31130e6fd3d87d62a1ac2770fba58bed5a06c47ce70fa97f8218b1b2743a", "typeString": "literal_string \"Deflating Test Token\"" }, "value": "Deflating Test Token" }, "visibility": "public" }, { "constant": true, "functionSelector": "95d89b41", "id": 5379, "mutability": "constant", "name": "symbol", "nodeType": "VariableDeclaration", "overrides": 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