{ "contractName": "SafeMath", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.6.8+commit.0bbfe453\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Wrappers over Solidity's arithmetic operations with added overflow checks. * Arithmetic operations in Solidity wrap on overflow. This can easily result in bugs, because programmers usually assume that an overflow raises an error, which is the standard behavior in high level programming languages. `SafeMath` restores this intuition by reverting the transaction when an operation overflows. * Using this library instead of the unchecked operations eliminates an entire class of bugs, so it's recommended to use it always.\",\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/math/SafeMath.sol\":\"SafeMath\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/math/SafeMath.sol\":{\"keccak256\":\"0x9a9cf02622cd7a64261b10534fc3260449da25c98c9e96d1b4ae8110a20e5806\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://2df142592d1dc267d9549049ee3317fa190d2f87eaa565f86ab05ec83f7ab8f5\",\"dweb:/ipfs/QmSkJtcfWo7c42KnL5hho6GFxK6HRNV91XABx1P7xDtfLV\"]}},\"version\":1}", "bytecode": "0x60566023600b82828239805160001a607314601657fe5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212207ece2919c1f5c2bd8626860213eed852d2fb2b4688369f4bfd1d251cadc9086e64736f6c63430006080033", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212207ece2919c1f5c2bd8626860213eed852d2fb2b4688369f4bfd1d251cadc9086e64736f6c63430006080033", "immutableReferences": {}, "sourceMap": "622:4578:1:-:0;;132:2:-1;166:7;155:9;146:7;137:37;255:7;249:14;246:1;241:23;235:4;232:33;222:2;;269:9;222:2;293:9;290:1;283:20;323:4;314:7;306:22;347:7;338;331:24", "deployedSourceMap": "622:4578:1:-:0;;;;;;12:1:-1;9;2:12", "source": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.6.0;\n\n/**\n * @dev Wrappers over Solidity's arithmetic operations with added overflow\n * checks.\n *\n * Arithmetic operations in Solidity wrap on overflow. This can easily result\n * in bugs, because programmers usually assume that an overflow raises an\n * error, which is the standard behavior in high level programming languages.\n * `SafeMath` restores this intuition by reverting the transaction when an\n * operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n */\nlibrary SafeMath {\n /**\n * @dev Returns the addition of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `+` operator.\n *\n * Requirements:\n *\n * - Addition cannot overflow.\n */\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n require(c >= a, \"SafeMath: addition overflow\");\n\n return c;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting on\n * overflow (when the result is negative).\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n return sub(a, b, \"SafeMath: subtraction overflow\");\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n * overflow (when the result is negative).\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n require(b <= a, errorMessage);\n uint256 c = a - b;\n\n return c;\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `*` operator.\n *\n * Requirements:\n *\n * - Multiplication cannot overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n // Gas optimization: this is cheaper than requiring 'a' not being zero, but the\n // benefit is lost if 'b' is also tested.\n // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n if (a == 0) {\n return 0;\n }\n\n uint256 c = a * b;\n require(c / a == b, \"SafeMath: multiplication overflow\");\n\n return c;\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers. Reverts on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n * `revert` opcode (which leaves remaining gas untouched) while Solidity\n * uses an invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n return div(a, b, \"SafeMath: division by zero\");\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers. Reverts with custom message on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n * `revert` opcode (which leaves remaining gas untouched) while Solidity\n * uses an invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n require(b > 0, errorMessage);\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n\n return c;\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * Reverts when dividing by zero.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n return mod(a, b, \"SafeMath: modulo by zero\");\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * Reverts with custom message when dividing by zero.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n require(b != 0, errorMessage);\n return a % b;\n }\n}\n", "sourcePath": "@openzeppelin/contracts/math/SafeMath.sol", "ast": { "absolutePath": "@openzeppelin/contracts/math/SafeMath.sol", "exportedSymbols": { "SafeMath": [ 218 ] }, "id": 219, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 24, "literals": [ "solidity", "^", "0.6", ".0" ], "nodeType": "PragmaDirective", "src": "33:23:1" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": { "id": 25, "nodeType": "StructuredDocumentation", "src": "58:563:1", "text": "@dev Wrappers over Solidity's arithmetic operations with added overflow\nchecks.\n * Arithmetic operations in Solidity wrap on overflow. This can easily result\nin bugs, because programmers usually assume that an overflow raises an\nerror, which is the standard behavior in high level programming languages.\n`SafeMath` restores this intuition by reverting the transaction when an\noperation overflows.\n * Using this library instead of the unchecked operations eliminates an entire\nclass of bugs, so it's recommended to use it always." }, "fullyImplemented": true, "id": 218, "linearizedBaseContracts": [ 218 ], "name": "SafeMath", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 50, "nodeType": "Block", "src": "941:109:1", "statements": [ { "assignments": [ 36 ], "declarations": [ { "constant": false, "id": 36, "mutability": "mutable", "name": "c", "nodeType": "VariableDeclaration", "overrides": null, "scope": 50, "src": "951:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 35, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "951:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 40, "initialValue": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 39, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 37, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 28, "src": "963:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 38, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 30, "src": "967:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "963:5:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "951:17:1" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 44, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 42, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 36, "src": "986:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "argumentTypes": null, "id": 43, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 28, "src": "991:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "986:6:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a206164646974696f6e206f766572666c6f77", "id": 45, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "994:29:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_30cc447bcc13b3e22b45cef0dd9b0b514842d836dd9b6eb384e20dedfb47723a", "typeString": "literal_string \"SafeMath: addition overflow\"" }, "value": "SafeMath: addition overflow" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_30cc447bcc13b3e22b45cef0dd9b0b514842d836dd9b6eb384e20dedfb47723a", "typeString": "literal_string \"SafeMath: addition overflow\"" } ], "id": 41, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "978:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 46, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "978:46:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 47, "nodeType": "ExpressionStatement", "src": "978:46:1" }, { "expression": { "argumentTypes": null, "id": 48, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 36, "src": "1042:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 34, "id": 49, "nodeType": "Return", "src": "1035:8:1" } ] }, "documentation": { "id": 26, "nodeType": "StructuredDocumentation", "src": "645:224:1", "text": "@dev Returns the addition of two unsigned integers, reverting on\noverflow.\n * Counterpart to Solidity's `+` operator.\n * Requirements:\n * - Addition cannot overflow." }, "id": 51, "implemented": true, "kind": "function", "modifiers": [], "name": "add", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 31, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 28, "mutability": "mutable", "name": "a", "nodeType": "VariableDeclaration", "overrides": null, "scope": 51, "src": "887:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 27, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "887:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 30, "mutability": "mutable", "name": "b", "nodeType": "VariableDeclaration", "overrides": null, "scope": 51, "src": "898:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 29, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "898:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "886:22:1" }, "returnParameters": { "id": 34, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 33, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 51, "src": "932:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 32, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "932:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "931:9:1" }, "scope": 218, "src": "874:176:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 67, "nodeType": "Block", "src": "1388:67:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 62, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 54, "src": "1409:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 63, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 56, "src": "1412:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a207375627472616374696f6e206f766572666c6f77", "id": 64, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1415:32:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_50b058e9b5320e58880d88223c9801cd9eecdcf90323d5c2318bc1b6b916e862", "typeString": "literal_string \"SafeMath: subtraction overflow\"" }, "value": "SafeMath: subtraction overflow" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_50b058e9b5320e58880d88223c9801cd9eecdcf90323d5c2318bc1b6b916e862", "typeString": "literal_string \"SafeMath: subtraction overflow\"" } ], "id": 61, "name": "sub", "nodeType": "Identifier", "overloadedDeclarations": [ 68, 96 ], "referencedDeclaration": 96, "src": "1405:3:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 65, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1405:43:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 60, "id": 66, "nodeType": "Return", "src": "1398:50:1" } ] }, "documentation": { "id": 52, "nodeType": "StructuredDocumentation", "src": "1056:260:1", "text": "@dev Returns the subtraction of two unsigned integers, reverting on\noverflow (when the result is negative).\n * Counterpart to Solidity's `-` operator.\n * Requirements:\n * - Subtraction cannot overflow." }, "id": 68, "implemented": true, "kind": "function", "modifiers": [], "name": "sub", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 57, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 54, "mutability": "mutable", "name": "a", "nodeType": "VariableDeclaration", "overrides": null, "scope": 68, "src": "1334:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 53, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1334:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 56, "mutability": "mutable", "name": "b", "nodeType": "VariableDeclaration", "overrides": null, "scope": 68, "src": "1345:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 55, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1345:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "1333:22:1" }, "returnParameters": { "id": 60, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 59, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 68, "src": "1379:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 58, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1379:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "1378:9:1" }, "scope": 218, "src": "1321:134:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 95, "nodeType": "Block", "src": "1841:92:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 83, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 81, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 73, "src": "1859:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<=", "rightExpression": { "argumentTypes": null, "id": 82, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 71, "src": "1864:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "1859:6:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 84, "name": "errorMessage", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 75, "src": "1867:12:1", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } ], "id": 80, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "1851:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 85, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1851:29:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 86, "nodeType": "ExpressionStatement", "src": "1851:29:1" }, { "assignments": [ 88 ], "declarations": [ { "constant": false, "id": 88, "mutability": "mutable", "name": "c", "nodeType": "VariableDeclaration", "overrides": null, "scope": 95, "src": "1890:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 87, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1890:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 92, "initialValue": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 91, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 89, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 71, "src": "1902:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "argumentTypes": null, "id": 90, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 73, "src": "1906:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "1902:5:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "1890:17:1" }, { "expression": { "argumentTypes": null, "id": 93, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 88, "src": "1925:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 79, "id": 94, "nodeType": "Return", "src": "1918:8:1" } ] }, "documentation": { "id": 69, "nodeType": "StructuredDocumentation", "src": "1461:280:1", "text": "@dev Returns the subtraction of two unsigned integers, reverting with custom message on\noverflow (when the result is negative).\n * Counterpart to Solidity's `-` operator.\n * Requirements:\n * - Subtraction cannot overflow." }, "id": 96, "implemented": true, "kind": "function", "modifiers": [], "name": "sub", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 76, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 71, "mutability": "mutable", "name": "a", "nodeType": "VariableDeclaration", "overrides": null, "scope": 96, "src": "1759:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 70, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1759:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 73, "mutability": "mutable", "name": "b", "nodeType": "VariableDeclaration", "overrides": null, "scope": 96, "src": "1770:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 72, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1770:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 75, "mutability": "mutable", "name": "errorMessage", "nodeType": "VariableDeclaration", "overrides": null, "scope": 96, "src": "1781:26:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 74, "name": "string", "nodeType": "ElementaryTypeName", "src": "1781:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "1758:50:1" }, "returnParameters": { "id": 79, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 78, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 96, "src": "1832:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 77, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1832:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "1831:9:1" }, "scope": 218, "src": "1746:187:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 130, "nodeType": "Block", "src": "2247:392:1", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 108, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 106, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 99, "src": "2479:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 107, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2484:1:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "2479:6:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 112, "nodeType": "IfStatement", "src": "2475:45:1", "trueBody": { "id": 111, "nodeType": "Block", "src": "2487:33:1", "statements": [ { "expression": { "argumentTypes": null, "hexValue": "30", "id": 109, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2508:1:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "functionReturnParameters": 105, "id": 110, "nodeType": "Return", "src": "2501:8:1" } ] } }, { "assignments": [ 114 ], "declarations": [ { "constant": false, "id": 114, "mutability": "mutable", "name": "c", "nodeType": "VariableDeclaration", "overrides": null, "scope": 130, "src": "2530:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 113, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2530:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 118, "initialValue": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 117, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 115, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 99, "src": "2542:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "*", "rightExpression": { "argumentTypes": null, "id": 116, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 101, "src": "2546:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2542:5:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "2530:17:1" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 124, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 122, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 120, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 114, "src": "2565:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "/", "rightExpression": { "argumentTypes": null, "id": 121, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 99, "src": "2569:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2565:5:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 123, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 101, "src": "2574:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2565:10:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a206d756c7469706c69636174696f6e206f766572666c6f77", "id": 125, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2577:35:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_9113bb53c2876a3805b2c9242029423fc540a728243ce887ab24c82cf119fba3", "typeString": "literal_string \"SafeMath: multiplication overflow\"" }, "value": "SafeMath: multiplication overflow" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_9113bb53c2876a3805b2c9242029423fc540a728243ce887ab24c82cf119fba3", "typeString": "literal_string \"SafeMath: multiplication overflow\"" } ], "id": 119, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "2557:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 126, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2557:56:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 127, "nodeType": "ExpressionStatement", "src": "2557:56:1" }, { "expression": { "argumentTypes": null, "id": 128, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 114, "src": "2631:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 105, "id": 129, "nodeType": "Return", "src": "2624:8:1" } ] }, "documentation": { "id": 97, "nodeType": "StructuredDocumentation", "src": "1939:236:1", "text": "@dev Returns the multiplication of two unsigned integers, reverting on\noverflow.\n * Counterpart to Solidity's `*` operator.\n * Requirements:\n * - Multiplication cannot overflow." }, "id": 131, "implemented": true, "kind": "function", "modifiers": [], "name": "mul", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 102, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 99, "mutability": "mutable", "name": "a", "nodeType": "VariableDeclaration", "overrides": null, "scope": 131, "src": "2193:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 98, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2193:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 101, "mutability": "mutable", "name": "b", "nodeType": "VariableDeclaration", "overrides": null, "scope": 131, "src": "2204:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 100, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2204:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2192:22:1" }, "returnParameters": { "id": 105, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 104, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 131, "src": "2238:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 103, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2238:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2237:9:1" }, "scope": 218, "src": "2180:459:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 147, "nodeType": "Block", "src": "3168:63:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 142, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 134, "src": "3189:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 143, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 136, "src": "3192:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a206469766973696f6e206279207a65726f", "id": 144, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3195:28:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_5b7cc70dda4dc2143e5adb63bd5d1f349504f461dbdfd9bc76fac1f8ca6d019f", "typeString": "literal_string \"SafeMath: division by zero\"" }, "value": "SafeMath: division by zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_5b7cc70dda4dc2143e5adb63bd5d1f349504f461dbdfd9bc76fac1f8ca6d019f", "typeString": "literal_string \"SafeMath: division by zero\"" } ], "id": 141, "name": "div", "nodeType": "Identifier", "overloadedDeclarations": [ 148, 176 ], "referencedDeclaration": 176, "src": "3185:3:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 145, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3185:39:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 140, "id": 146, "nodeType": "Return", "src": "3178:46:1" } ] }, "documentation": { "id": 132, "nodeType": "StructuredDocumentation", "src": "2645:451:1", "text": "@dev Returns the integer division of two unsigned integers. Reverts on\ndivision by zero. The result is rounded towards zero.\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n`revert` opcode (which leaves remaining gas untouched) while Solidity\nuses an invalid opcode to revert (consuming all remaining gas).\n * Requirements:\n * - The divisor cannot be zero." }, "id": 148, "implemented": true, "kind": "function", "modifiers": [], "name": "div", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 137, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 134, "mutability": "mutable", "name": "a", "nodeType": "VariableDeclaration", "overrides": null, "scope": 148, "src": "3114:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 133, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3114:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 136, "mutability": "mutable", "name": "b", "nodeType": "VariableDeclaration", "overrides": null, "scope": 148, "src": "3125:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 135, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3125:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3113:22:1" }, "returnParameters": { "id": 140, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 139, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 148, "src": "3159:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 138, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3159:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3158:9:1" }, "scope": 218, "src": "3101:130:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 175, "nodeType": "Block", "src": "3808:177:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 163, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 161, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 153, "src": "3826:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 162, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "3830:1:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "3826:5:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 164, "name": "errorMessage", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 155, "src": "3833:12:1", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } ], "id": 160, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "3818:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 165, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3818:28:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 166, "nodeType": "ExpressionStatement", "src": "3818:28:1" }, { "assignments": [ 168 ], "declarations": [ { "constant": false, "id": 168, "mutability": "mutable", "name": "c", "nodeType": "VariableDeclaration", "overrides": null, "scope": 175, "src": "3856:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 167, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3856:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 172, "initialValue": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 171, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 169, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 151, "src": "3868:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "/", "rightExpression": { "argumentTypes": null, "id": 170, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 153, "src": "3872:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "3868:5:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "3856:17:1" }, { "expression": { "argumentTypes": null, "id": 173, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 168, "src": "3977:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 159, "id": 174, "nodeType": "Return", "src": "3970:8:1" } ] }, "documentation": { "id": 149, "nodeType": "StructuredDocumentation", "src": "3237:471:1", "text": "@dev Returns the integer division of two unsigned integers. Reverts with custom message on\ndivision by zero. The result is rounded towards zero.\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n`revert` opcode (which leaves remaining gas untouched) while Solidity\nuses an invalid opcode to revert (consuming all remaining gas).\n * Requirements:\n * - The divisor cannot be zero." }, "id": 176, "implemented": true, "kind": "function", "modifiers": [], "name": "div", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 156, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 151, "mutability": "mutable", "name": "a", "nodeType": "VariableDeclaration", "overrides": null, "scope": 176, "src": "3726:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 150, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3726:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 153, "mutability": "mutable", "name": "b", "nodeType": "VariableDeclaration", "overrides": null, "scope": 176, "src": "3737:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 152, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3737:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 155, "mutability": "mutable", "name": "errorMessage", "nodeType": "VariableDeclaration", "overrides": null, "scope": 176, "src": "3748:26:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 154, "name": "string", "nodeType": "ElementaryTypeName", "src": "3748:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "3725:50:1" }, "returnParameters": { "id": 159, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 158, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 176, "src": "3799:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 157, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3799:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3798:9:1" }, "scope": 218, "src": "3713:272:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 192, "nodeType": "Block", "src": "4503:61:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 187, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 179, "src": "4524:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 188, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 181, "src": "4527:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a206d6f64756c6f206279207a65726f", "id": 189, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4530:26:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_726e51f7b81fce0a68f5f214f445e275313b20b1633f08ce954ee39abf8d7832", "typeString": "literal_string \"SafeMath: modulo by zero\"" }, "value": "SafeMath: modulo by zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_726e51f7b81fce0a68f5f214f445e275313b20b1633f08ce954ee39abf8d7832", "typeString": "literal_string \"SafeMath: modulo by zero\"" } ], "id": 186, "name": "mod", "nodeType": "Identifier", "overloadedDeclarations": [ 193, 217 ], "referencedDeclaration": 217, "src": "4520:3:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 190, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4520:37:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 185, "id": 191, "nodeType": "Return", "src": "4513:44:1" } ] }, "documentation": { "id": 177, "nodeType": "StructuredDocumentation", "src": "3991:440:1", "text": "@dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\nReverts when dividing by zero.\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\nopcode (which leaves remaining gas untouched) while Solidity uses an\ninvalid opcode to revert (consuming all remaining gas).\n * Requirements:\n * - The divisor cannot be zero." }, "id": 193, "implemented": true, "kind": "function", "modifiers": [], "name": "mod", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 182, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 179, "mutability": "mutable", "name": "a", "nodeType": "VariableDeclaration", "overrides": null, "scope": 193, "src": "4449:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 178, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4449:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 181, "mutability": "mutable", "name": "b", "nodeType": "VariableDeclaration", "overrides": null, "scope": 193, "src": "4460:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 180, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4460:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4448:22:1" }, "returnParameters": { "id": 185, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 184, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 193, "src": "4494:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 183, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4494:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4493:9:1" }, "scope": 218, "src": "4436:128:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 216, "nodeType": "Block", "src": "5130:68:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 208, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 206, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 198, "src": "5148:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 207, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5153:1:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "5148:6:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 209, "name": "errorMessage", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 200, "src": "5156:12:1", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } ], "id": 205, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "5140:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 210, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5140:29:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 211, "nodeType": "ExpressionStatement", "src": "5140:29:1" }, { "expression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 214, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 212, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 196, "src": "5186:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "%", "rightExpression": { "argumentTypes": null, "id": 213, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 198, "src": "5190:1:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "5186:5:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 204, "id": 215, "nodeType": "Return", "src": "5179:12:1" } ] }, "documentation": { "id": 194, "nodeType": "StructuredDocumentation", "src": "4570:460:1", "text": "@dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\nReverts with custom message when dividing by zero.\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\nopcode (which leaves remaining gas untouched) while Solidity uses an\ninvalid opcode to revert (consuming all remaining gas).\n * Requirements:\n * - The divisor cannot be zero." }, "id": 217, "implemented": true, "kind": "function", "modifiers": [], "name": "mod", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 201, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 196, "mutability": "mutable", "name": "a", "nodeType": "VariableDeclaration", "overrides": null, "scope": 217, "src": "5048:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 195, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5048:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 198, "mutability": "mutable", "name": "b", "nodeType": "VariableDeclaration", "overrides": null, "scope": 217, "src": "5059:9:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 197, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5059:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 200, "mutability": "mutable", "name": "errorMessage", "nodeType": "VariableDeclaration", "overrides": null, "scope": 217, "src": "5070:26:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 199, "name": "string", "nodeType": "ElementaryTypeName", "src": "5070:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "5047:50:1" }, "returnParameters": { "id": 204, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 203, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 217, "src": "5121:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 202, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5121:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5120:9:1" }, "scope": 218, "src": "5035:163:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" } ], "scope": 219, "src": "622:4578:1" } ], "src": "33:5168:1" }, "legacyAST": { "attributes": { "absolutePath": "@openzeppelin/contracts/math/SafeMath.sol", "exportedSymbols": { "SafeMath": [ 218 ] }, "license": "MIT" }, "children": [ { "attributes": { "literals": [ "solidity", "^", "0.6", ".0" ] }, "id": 24, "name": "PragmaDirective", "src": "33:23:1" }, { "attributes": { "abstract": false, "baseContracts": [ null ], "contractDependencies": [ null ], "contractKind": "library", "fullyImplemented": true, "linearizedBaseContracts": [ 218 ], "name": "SafeMath", "scope": 219 }, "children": [ { "attributes": { "text": "@dev Wrappers over Solidity's arithmetic operations with added overflow\nchecks.\n * Arithmetic operations in Solidity wrap on overflow. This can easily result\nin bugs, because programmers usually assume that an overflow raises an\nerror, which is the standard behavior in high level programming languages.\n`SafeMath` restores this intuition by reverting the transaction when an\noperation overflows.\n * Using this library instead of the unchecked operations eliminates an entire\nclass of bugs, so it's recommended to use it always." }, "id": 25, "name": "StructuredDocumentation", "src": "58:563:1" }, { "attributes": { "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "add", "overrides": null, "scope": 218, "stateMutability": "pure", "virtual": false, "visibility": "internal" }, "children": [ { "attributes": { "text": "@dev Returns the addition of two unsigned integers, reverting on\noverflow.\n * Counterpart to Solidity's `+` operator.\n * Requirements:\n * - Addition cannot overflow." }, "id": 26, "name": "StructuredDocumentation", "src": "645:224:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "a", "overrides": null, "scope": 51, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 27, "name": "ElementaryTypeName", "src": "887:7:1" } ], "id": 28, "name": "VariableDeclaration", "src": "887:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "b", "overrides": null, "scope": 51, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 29, "name": "ElementaryTypeName", "src": "898:7:1" } ], "id": 30, "name": "VariableDeclaration", "src": "898:9:1" } ], "id": 31, "name": "ParameterList", "src": "886:22:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "", "overrides": null, "scope": 51, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 32, "name": "ElementaryTypeName", "src": "932:7:1" } ], "id": 33, "name": "VariableDeclaration", "src": "932:7:1" } ], "id": 34, "name": "ParameterList", "src": "931:9:1" }, { "children": [ { "attributes": { "assignments": [ 36 ] }, "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "c", "overrides": null, "scope": 50, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 35, "name": "ElementaryTypeName", "src": "951:7:1" } ], "id": 36, "name": "VariableDeclaration", "src": "951:9:1" }, { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "+", "type": "uint256" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 28, "type": "uint256", "value": "a" }, "id": 37, "name": "Identifier", "src": "963:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 30, "type": "uint256", "value": "b" }, "id": 38, "name": "Identifier", "src": "967:1:1" } ], "id": 39, "name": "BinaryOperation", "src": "963:5:1" } ], "id": 40, "name": "VariableDeclarationStatement", "src": "951:17:1" }, { "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "tryCall": false, "type": "tuple()", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_30cc447bcc13b3e22b45cef0dd9b0b514842d836dd9b6eb384e20dedfb47723a", "typeString": "literal_string \"SafeMath: addition overflow\"" } ], "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "type": "function (bool,string memory) pure", "value": "require" }, "id": 41, "name": "Identifier", "src": "978:7:1" }, { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": ">=", "type": "bool" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 36, "type": "uint256", "value": "c" }, "id": 42, "name": "Identifier", "src": "986:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 28, "type": "uint256", "value": "a" }, "id": 43, "name": "Identifier", "src": "991:1:1" } ], "id": 44, "name": "BinaryOperation", "src": "986:6:1" }, { "attributes": { "argumentTypes": null, "hexvalue": "536166654d6174683a206164646974696f6e206f766572666c6f77", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "string", "type": "literal_string \"SafeMath: addition overflow\"", "value": "SafeMath: addition overflow" }, "id": 45, "name": "Literal", "src": "994:29:1" } ], "id": 46, "name": "FunctionCall", "src": "978:46:1" } ], "id": 47, "name": "ExpressionStatement", "src": "978:46:1" }, { "attributes": { "functionReturnParameters": 34 }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 36, "type": "uint256", "value": "c" }, "id": 48, "name": "Identifier", "src": "1042:1:1" } ], "id": 49, "name": "Return", "src": "1035:8:1" } ], "id": 50, "name": "Block", "src": "941:109:1" } ], "id": 51, "name": "FunctionDefinition", "src": "874:176:1" }, { "attributes": { "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "sub", "overrides": null, "scope": 218, "stateMutability": "pure", "virtual": false, "visibility": "internal" }, "children": [ { "attributes": { "text": "@dev Returns the subtraction of two unsigned integers, reverting on\noverflow (when the result is negative).\n * Counterpart to Solidity's `-` operator.\n * Requirements:\n * - Subtraction cannot overflow." }, "id": 52, "name": "StructuredDocumentation", "src": "1056:260:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "a", "overrides": null, "scope": 68, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 53, "name": "ElementaryTypeName", "src": "1334:7:1" } ], "id": 54, "name": "VariableDeclaration", "src": "1334:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "b", "overrides": null, "scope": 68, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 55, "name": "ElementaryTypeName", "src": "1345:7:1" } ], "id": 56, "name": "VariableDeclaration", "src": "1345:9:1" } ], "id": 57, "name": "ParameterList", "src": "1333:22:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "", "overrides": null, "scope": 68, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 58, "name": "ElementaryTypeName", "src": "1379:7:1" } ], "id": 59, "name": "VariableDeclaration", "src": "1379:7:1" } ], "id": 60, "name": "ParameterList", "src": "1378:9:1" }, { "children": [ { "attributes": { "functionReturnParameters": 60 }, "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "tryCall": false, "type": "uint256", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_50b058e9b5320e58880d88223c9801cd9eecdcf90323d5c2318bc1b6b916e862", "typeString": "literal_string \"SafeMath: subtraction overflow\"" } ], "overloadedDeclarations": [ 68, 96 ], "referencedDeclaration": 96, "type": "function (uint256,uint256,string memory) pure returns (uint256)", "value": "sub" }, "id": 61, "name": "Identifier", "src": "1405:3:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 54, "type": "uint256", "value": "a" }, "id": 62, "name": "Identifier", "src": "1409:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 56, "type": "uint256", "value": "b" }, "id": 63, "name": "Identifier", "src": "1412:1:1" }, { "attributes": { "argumentTypes": null, "hexvalue": "536166654d6174683a207375627472616374696f6e206f766572666c6f77", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "string", "type": "literal_string \"SafeMath: subtraction overflow\"", "value": "SafeMath: subtraction overflow" }, "id": 64, "name": "Literal", "src": "1415:32:1" } ], "id": 65, "name": "FunctionCall", "src": "1405:43:1" } ], "id": 66, "name": "Return", "src": "1398:50:1" } ], "id": 67, "name": "Block", "src": "1388:67:1" } ], "id": 68, "name": "FunctionDefinition", "src": "1321:134:1" }, { "attributes": { "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "sub", "overrides": null, "scope": 218, "stateMutability": "pure", "virtual": false, "visibility": "internal" }, "children": [ { "attributes": { "text": "@dev Returns the subtraction of two unsigned integers, reverting with custom message on\noverflow (when the result is negative).\n * Counterpart to Solidity's `-` operator.\n * Requirements:\n * - Subtraction cannot overflow." }, "id": 69, "name": "StructuredDocumentation", "src": "1461:280:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "a", "overrides": null, "scope": 96, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 70, "name": "ElementaryTypeName", "src": "1759:7:1" } ], "id": 71, "name": "VariableDeclaration", "src": "1759:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "b", "overrides": null, "scope": 96, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 72, "name": "ElementaryTypeName", "src": "1770:7:1" } ], "id": 73, "name": "VariableDeclaration", "src": "1770:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "errorMessage", "overrides": null, "scope": 96, "stateVariable": false, "storageLocation": "memory", "type": "string", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "string", "type": "string" }, "id": 74, "name": "ElementaryTypeName", "src": "1781:6:1" } ], "id": 75, "name": "VariableDeclaration", "src": "1781:26:1" } ], "id": 76, "name": "ParameterList", "src": "1758:50:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "", "overrides": null, "scope": 96, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 77, "name": "ElementaryTypeName", "src": "1832:7:1" } ], "id": 78, "name": "VariableDeclaration", "src": "1832:7:1" } ], "id": 79, "name": "ParameterList", "src": "1831:9:1" }, { "children": [ { "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "tryCall": false, "type": "tuple()", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } ], "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "type": "function (bool,string memory) pure", "value": "require" }, "id": 80, "name": "Identifier", "src": "1851:7:1" }, { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "<=", "type": "bool" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 73, "type": "uint256", "value": "b" }, "id": 81, "name": "Identifier", "src": "1859:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 71, "type": "uint256", "value": "a" }, "id": 82, "name": "Identifier", "src": "1864:1:1" } ], "id": 83, "name": "BinaryOperation", "src": "1859:6:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 75, "type": "string memory", "value": "errorMessage" }, "id": 84, "name": "Identifier", "src": "1867:12:1" } ], "id": 85, "name": "FunctionCall", "src": "1851:29:1" } ], "id": 86, "name": "ExpressionStatement", "src": "1851:29:1" }, { "attributes": { "assignments": [ 88 ] }, "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "c", "overrides": null, "scope": 95, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 87, "name": "ElementaryTypeName", "src": "1890:7:1" } ], "id": 88, "name": "VariableDeclaration", "src": "1890:9:1" }, { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "-", "type": "uint256" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 71, "type": "uint256", "value": "a" }, "id": 89, "name": "Identifier", "src": "1902:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 73, "type": "uint256", "value": "b" }, "id": 90, "name": "Identifier", "src": "1906:1:1" } ], "id": 91, "name": "BinaryOperation", "src": "1902:5:1" } ], "id": 92, "name": "VariableDeclarationStatement", "src": "1890:17:1" }, { "attributes": { "functionReturnParameters": 79 }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 88, "type": "uint256", "value": "c" }, "id": 93, "name": "Identifier", "src": "1925:1:1" } ], "id": 94, "name": "Return", "src": "1918:8:1" } ], "id": 95, "name": "Block", "src": "1841:92:1" } ], "id": 96, "name": "FunctionDefinition", "src": "1746:187:1" }, { "attributes": { "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "mul", "overrides": null, "scope": 218, "stateMutability": "pure", "virtual": false, "visibility": "internal" }, "children": [ { "attributes": { "text": "@dev Returns the multiplication of two unsigned integers, reverting on\noverflow.\n * Counterpart to Solidity's `*` operator.\n * Requirements:\n * - Multiplication cannot overflow." }, "id": 97, "name": "StructuredDocumentation", "src": "1939:236:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "a", "overrides": null, "scope": 131, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 98, "name": "ElementaryTypeName", "src": "2193:7:1" } ], "id": 99, "name": "VariableDeclaration", "src": "2193:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "b", "overrides": null, "scope": 131, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 100, "name": "ElementaryTypeName", "src": "2204:7:1" } ], "id": 101, "name": "VariableDeclaration", "src": "2204:9:1" } ], "id": 102, "name": "ParameterList", "src": "2192:22:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "", "overrides": null, "scope": 131, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 103, "name": "ElementaryTypeName", "src": "2238:7:1" } ], "id": 104, "name": "VariableDeclaration", "src": "2238:7:1" } ], "id": 105, "name": "ParameterList", "src": "2237:9:1" }, { "children": [ { "attributes": { "falseBody": null }, "children": [ { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "==", "type": "bool" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 99, "type": "uint256", "value": "a" }, "id": 106, "name": "Identifier", "src": "2479:1:1" }, { "attributes": { "argumentTypes": null, "hexvalue": "30", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "number", "type": "int_const 0", "value": "0" }, "id": 107, "name": "Literal", "src": "2484:1:1" } ], "id": 108, "name": "BinaryOperation", "src": "2479:6:1" }, { "children": [ { "attributes": { "functionReturnParameters": 105 }, "children": [ { "attributes": { "argumentTypes": null, "hexvalue": "30", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "number", "type": "int_const 0", "value": "0" }, "id": 109, "name": "Literal", "src": "2508:1:1" } ], "id": 110, "name": "Return", "src": "2501:8:1" } ], "id": 111, "name": "Block", "src": "2487:33:1" } ], "id": 112, "name": "IfStatement", "src": "2475:45:1" }, { "attributes": { "assignments": [ 114 ] }, "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "c", "overrides": null, "scope": 130, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 113, "name": "ElementaryTypeName", "src": "2530:7:1" } ], "id": 114, "name": "VariableDeclaration", "src": "2530:9:1" }, { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "*", "type": "uint256" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 99, "type": "uint256", "value": "a" }, "id": 115, "name": "Identifier", "src": "2542:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 101, "type": "uint256", "value": "b" }, "id": 116, "name": "Identifier", "src": "2546:1:1" } ], "id": 117, "name": "BinaryOperation", "src": "2542:5:1" } ], "id": 118, "name": "VariableDeclarationStatement", "src": "2530:17:1" }, { "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "tryCall": false, "type": "tuple()", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_9113bb53c2876a3805b2c9242029423fc540a728243ce887ab24c82cf119fba3", "typeString": "literal_string \"SafeMath: multiplication overflow\"" } ], "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "type": "function (bool,string memory) pure", "value": "require" }, "id": 119, "name": "Identifier", "src": "2557:7:1" }, { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "==", "type": "bool" }, "children": [ { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "/", "type": "uint256" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 114, "type": "uint256", "value": "c" }, "id": 120, "name": "Identifier", "src": "2565:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 99, "type": "uint256", "value": "a" }, "id": 121, "name": "Identifier", "src": "2569:1:1" } ], "id": 122, "name": "BinaryOperation", "src": "2565:5:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 101, "type": "uint256", "value": "b" }, "id": 123, "name": "Identifier", "src": "2574:1:1" } ], "id": 124, "name": "BinaryOperation", "src": "2565:10:1" }, { "attributes": { "argumentTypes": null, "hexvalue": "536166654d6174683a206d756c7469706c69636174696f6e206f766572666c6f77", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "string", "type": "literal_string \"SafeMath: multiplication overflow\"", "value": "SafeMath: multiplication overflow" }, "id": 125, "name": "Literal", "src": "2577:35:1" } ], "id": 126, "name": "FunctionCall", "src": "2557:56:1" } ], "id": 127, "name": "ExpressionStatement", "src": "2557:56:1" }, { "attributes": { "functionReturnParameters": 105 }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 114, "type": "uint256", "value": "c" }, "id": 128, "name": "Identifier", "src": "2631:1:1" } ], "id": 129, "name": "Return", "src": "2624:8:1" } ], "id": 130, "name": "Block", "src": "2247:392:1" } ], "id": 131, "name": "FunctionDefinition", "src": "2180:459:1" }, { "attributes": { "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "div", "overrides": null, "scope": 218, "stateMutability": "pure", "virtual": false, "visibility": "internal" }, "children": [ { "attributes": { "text": "@dev Returns the integer division of two unsigned integers. Reverts on\ndivision by zero. The result is rounded towards zero.\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n`revert` opcode (which leaves remaining gas untouched) while Solidity\nuses an invalid opcode to revert (consuming all remaining gas).\n * Requirements:\n * - The divisor cannot be zero." }, "id": 132, "name": "StructuredDocumentation", "src": "2645:451:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "a", "overrides": null, "scope": 148, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 133, "name": "ElementaryTypeName", "src": "3114:7:1" } ], "id": 134, "name": "VariableDeclaration", "src": "3114:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "b", "overrides": null, "scope": 148, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 135, "name": "ElementaryTypeName", "src": "3125:7:1" } ], "id": 136, "name": "VariableDeclaration", "src": "3125:9:1" } ], "id": 137, "name": "ParameterList", "src": "3113:22:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "", "overrides": null, "scope": 148, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 138, "name": "ElementaryTypeName", "src": "3159:7:1" } ], "id": 139, "name": "VariableDeclaration", "src": "3159:7:1" } ], "id": 140, "name": "ParameterList", "src": "3158:9:1" }, { "children": [ { "attributes": { "functionReturnParameters": 140 }, "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "tryCall": false, "type": "uint256", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_5b7cc70dda4dc2143e5adb63bd5d1f349504f461dbdfd9bc76fac1f8ca6d019f", "typeString": "literal_string \"SafeMath: division by zero\"" } ], "overloadedDeclarations": [ 148, 176 ], "referencedDeclaration": 176, "type": "function (uint256,uint256,string memory) pure returns (uint256)", "value": "div" }, "id": 141, "name": "Identifier", "src": "3185:3:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 134, "type": "uint256", "value": "a" }, "id": 142, "name": "Identifier", "src": "3189:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 136, "type": "uint256", "value": "b" }, "id": 143, "name": "Identifier", "src": "3192:1:1" }, { "attributes": { "argumentTypes": null, "hexvalue": "536166654d6174683a206469766973696f6e206279207a65726f", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "string", "type": "literal_string \"SafeMath: division by zero\"", "value": "SafeMath: division by zero" }, "id": 144, "name": "Literal", "src": "3195:28:1" } ], "id": 145, "name": "FunctionCall", "src": "3185:39:1" } ], "id": 146, "name": "Return", "src": "3178:46:1" } ], "id": 147, "name": "Block", "src": "3168:63:1" } ], "id": 148, "name": "FunctionDefinition", "src": "3101:130:1" }, { "attributes": { "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "div", "overrides": null, "scope": 218, "stateMutability": "pure", "virtual": false, "visibility": "internal" }, "children": [ { "attributes": { "text": "@dev Returns the integer division of two unsigned integers. Reverts with custom message on\ndivision by zero. The result is rounded towards zero.\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n`revert` opcode (which leaves remaining gas untouched) while Solidity\nuses an invalid opcode to revert (consuming all remaining gas).\n * Requirements:\n * - The divisor cannot be zero." }, "id": 149, "name": "StructuredDocumentation", "src": "3237:471:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "a", "overrides": null, "scope": 176, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 150, "name": "ElementaryTypeName", "src": "3726:7:1" } ], "id": 151, "name": "VariableDeclaration", "src": "3726:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "b", "overrides": null, "scope": 176, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 152, "name": "ElementaryTypeName", "src": "3737:7:1" } ], "id": 153, "name": "VariableDeclaration", "src": "3737:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "errorMessage", "overrides": null, "scope": 176, "stateVariable": false, "storageLocation": "memory", "type": "string", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "string", "type": "string" }, "id": 154, "name": "ElementaryTypeName", "src": "3748:6:1" } ], "id": 155, "name": "VariableDeclaration", "src": "3748:26:1" } ], "id": 156, "name": "ParameterList", "src": "3725:50:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "", "overrides": null, "scope": 176, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 157, "name": "ElementaryTypeName", "src": "3799:7:1" } ], "id": 158, "name": "VariableDeclaration", "src": "3799:7:1" } ], "id": 159, "name": "ParameterList", "src": "3798:9:1" }, { "children": [ { "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "tryCall": false, "type": "tuple()", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } ], "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "type": "function (bool,string memory) pure", "value": "require" }, "id": 160, "name": "Identifier", "src": "3818:7:1" }, { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": ">", "type": "bool" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 153, "type": "uint256", "value": "b" }, "id": 161, "name": "Identifier", "src": "3826:1:1" }, { "attributes": { "argumentTypes": null, "hexvalue": "30", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "number", "type": "int_const 0", "value": "0" }, "id": 162, "name": "Literal", "src": "3830:1:1" } ], "id": 163, "name": "BinaryOperation", "src": "3826:5:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 155, "type": "string memory", "value": "errorMessage" }, "id": 164, "name": "Identifier", "src": "3833:12:1" } ], "id": 165, "name": "FunctionCall", "src": "3818:28:1" } ], "id": 166, "name": "ExpressionStatement", "src": "3818:28:1" }, { "attributes": { "assignments": [ 168 ] }, "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "c", "overrides": null, "scope": 175, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 167, "name": "ElementaryTypeName", "src": "3856:7:1" } ], "id": 168, "name": "VariableDeclaration", "src": "3856:9:1" }, { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "/", "type": "uint256" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 151, "type": "uint256", "value": "a" }, "id": 169, "name": "Identifier", "src": "3868:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 153, "type": "uint256", "value": "b" }, "id": 170, "name": "Identifier", "src": "3872:1:1" } ], "id": 171, "name": "BinaryOperation", "src": "3868:5:1" } ], "id": 172, "name": "VariableDeclarationStatement", "src": "3856:17:1" }, { "attributes": { "functionReturnParameters": 159 }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 168, "type": "uint256", "value": "c" }, "id": 173, "name": "Identifier", "src": "3977:1:1" } ], "id": 174, "name": "Return", "src": "3970:8:1" } ], "id": 175, "name": "Block", "src": "3808:177:1" } ], "id": 176, "name": "FunctionDefinition", "src": "3713:272:1" }, { "attributes": { "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "mod", "overrides": null, "scope": 218, "stateMutability": "pure", "virtual": false, "visibility": "internal" }, "children": [ { "attributes": { "text": "@dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\nReverts when dividing by zero.\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\nopcode (which leaves remaining gas untouched) while Solidity uses an\ninvalid opcode to revert (consuming all remaining gas).\n * Requirements:\n * - The divisor cannot be zero." }, "id": 177, "name": "StructuredDocumentation", "src": "3991:440:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "a", "overrides": null, "scope": 193, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 178, "name": "ElementaryTypeName", "src": "4449:7:1" } ], "id": 179, "name": "VariableDeclaration", "src": "4449:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "b", "overrides": null, "scope": 193, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 180, "name": "ElementaryTypeName", "src": "4460:7:1" } ], "id": 181, "name": "VariableDeclaration", "src": "4460:9:1" } ], "id": 182, "name": "ParameterList", "src": "4448:22:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "", "overrides": null, "scope": 193, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 183, "name": "ElementaryTypeName", "src": "4494:7:1" } ], "id": 184, "name": "VariableDeclaration", "src": "4494:7:1" } ], "id": 185, "name": "ParameterList", "src": "4493:9:1" }, { "children": [ { "attributes": { "functionReturnParameters": 185 }, "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "tryCall": false, "type": "uint256", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_726e51f7b81fce0a68f5f214f445e275313b20b1633f08ce954ee39abf8d7832", "typeString": "literal_string \"SafeMath: modulo by zero\"" } ], "overloadedDeclarations": [ 193, 217 ], "referencedDeclaration": 217, "type": "function (uint256,uint256,string memory) pure returns (uint256)", "value": "mod" }, "id": 186, "name": "Identifier", "src": "4520:3:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 179, "type": "uint256", "value": "a" }, "id": 187, "name": "Identifier", "src": "4524:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 181, "type": "uint256", "value": "b" }, "id": 188, "name": "Identifier", "src": "4527:1:1" }, { "attributes": { "argumentTypes": null, "hexvalue": "536166654d6174683a206d6f64756c6f206279207a65726f", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "string", "type": "literal_string \"SafeMath: modulo by zero\"", "value": "SafeMath: modulo by zero" }, "id": 189, "name": "Literal", "src": "4530:26:1" } ], "id": 190, "name": "FunctionCall", "src": "4520:37:1" } ], "id": 191, "name": "Return", "src": "4513:44:1" } ], "id": 192, "name": "Block", "src": "4503:61:1" } ], "id": 193, "name": "FunctionDefinition", "src": "4436:128:1" }, { "attributes": { "implemented": true, "isConstructor": false, "kind": "function", "modifiers": [ null ], "name": "mod", "overrides": null, "scope": 218, "stateMutability": "pure", "virtual": false, "visibility": "internal" }, "children": [ { "attributes": { "text": "@dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\nReverts with custom message when dividing by zero.\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\nopcode (which leaves remaining gas untouched) while Solidity uses an\ninvalid opcode to revert (consuming all remaining gas).\n * Requirements:\n * - The divisor cannot be zero." }, "id": 194, "name": "StructuredDocumentation", "src": "4570:460:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "a", "overrides": null, "scope": 217, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 195, "name": "ElementaryTypeName", "src": "5048:7:1" } ], "id": 196, "name": "VariableDeclaration", "src": "5048:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "b", "overrides": null, "scope": 217, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 197, "name": "ElementaryTypeName", "src": "5059:7:1" } ], "id": 198, "name": "VariableDeclaration", "src": "5059:9:1" }, { "attributes": { "constant": false, "mutability": "mutable", "name": "errorMessage", "overrides": null, "scope": 217, "stateVariable": false, "storageLocation": "memory", "type": "string", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "string", "type": "string" }, "id": 199, "name": "ElementaryTypeName", "src": "5070:6:1" } ], "id": 200, "name": "VariableDeclaration", "src": "5070:26:1" } ], "id": 201, "name": "ParameterList", "src": "5047:50:1" }, { "children": [ { "attributes": { "constant": false, "mutability": "mutable", "name": "", "overrides": null, "scope": 217, "stateVariable": false, "storageLocation": "default", "type": "uint256", "value": null, "visibility": "internal" }, "children": [ { "attributes": { "name": "uint256", "type": "uint256" }, "id": 202, "name": "ElementaryTypeName", "src": "5121:7:1" } ], "id": 203, "name": "VariableDeclaration", "src": "5121:7:1" } ], "id": 204, "name": "ParameterList", "src": "5120:9:1" }, { "children": [ { "children": [ { "attributes": { "argumentTypes": null, "isConstant": false, "isLValue": false, "isPure": false, "isStructConstructorCall": false, "lValueRequested": false, "names": [ null ], "tryCall": false, "type": "tuple()", "type_conversion": false }, "children": [ { "attributes": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } ], "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "type": "function (bool,string memory) pure", "value": "require" }, "id": 205, "name": "Identifier", "src": "5140:7:1" }, { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "!=", "type": "bool" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 198, "type": "uint256", "value": "b" }, "id": 206, "name": "Identifier", "src": "5148:1:1" }, { "attributes": { "argumentTypes": null, "hexvalue": "30", "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "subdenomination": null, "token": "number", "type": "int_const 0", "value": "0" }, "id": 207, "name": "Literal", "src": "5153:1:1" } ], "id": 208, "name": "BinaryOperation", "src": "5148:6:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 200, "type": "string memory", "value": "errorMessage" }, "id": 209, "name": "Identifier", "src": "5156:12:1" } ], "id": 210, "name": "FunctionCall", "src": "5140:29:1" } ], "id": 211, "name": "ExpressionStatement", "src": "5140:29:1" }, { "attributes": { "functionReturnParameters": 204 }, "children": [ { "attributes": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "operator": "%", "type": "uint256" }, "children": [ { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 196, "type": "uint256", "value": "a" }, "id": 212, "name": "Identifier", "src": "5186:1:1" }, { "attributes": { "argumentTypes": null, "overloadedDeclarations": [ null ], "referencedDeclaration": 198, "type": "uint256", "value": "b" }, "id": 213, "name": "Identifier", "src": "5190:1:1" } ], "id": 214, "name": "BinaryOperation", "src": "5186:5:1" } ], "id": 215, "name": "Return", "src": "5179:12:1" } ], "id": 216, "name": "Block", "src": "5130:68:1" } ], "id": 217, "name": "FunctionDefinition", "src": "5035:163:1" } ], "id": 218, "name": "ContractDefinition", "src": "622:4578:1" } ], "id": 219, "name": "SourceUnit", "src": "33:5168:1" }, "compiler": { "name": "solc", "version": "0.6.8+commit.0bbfe453.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.4.16", "updatedAt": "2025-02-07T17:50:42.753Z", "devdoc": { "details": "Wrappers over Solidity's arithmetic operations with added overflow checks. * Arithmetic operations in Solidity wrap on overflow. This can easily result in bugs, because programmers usually assume that an overflow raises an error, which is the standard behavior in high level programming languages. `SafeMath` restores this intuition by reverting the transaction when an operation overflows. * Using this library instead of the unchecked operations eliminates an entire class of bugs, so it's recommended to use it always.", "methods": {} }, "userdoc": { "methods": {} } }