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"t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_9113bb53c2876a3805b2c9242029423fc540a728243ce887ab24c82cf119fba3", "typeString": "literal_string \"SafeMath: multiplication overflow\"" } ], "id": 2808, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 3599, 3600 ], "referencedDeclaration": 3600, "src": "2536:7:17", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2815, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2536:56:17", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2816, "nodeType": "ExpressionStatement", "src": "2536:56:17" }, { "expression": { "argumentTypes": null, "id": 2817, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2803, "src": "2610:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2794, "id": 2818, "nodeType": "Return", "src": "2603:8:17" } ] }, "documentation": "@dev Returns the multiplication of two unsigned integers, reverting on\noverflow.\n * Counterpart to Solidity's `*` operator.\n * Requirements:\n- Multiplication cannot overflow.", "id": 2820, "implemented": true, "kind": "function", "modifiers": [], "name": "mul", "nodeType": "FunctionDefinition", "parameters": { "id": 2791, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2788, "name": "a", "nodeType": "VariableDeclaration", "scope": 2820, "src": "2172:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2787, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2172:7:17", "typeDescriptions": { 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"t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 2833, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3157:39:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2828, "id": 2834, "nodeType": "Return", "src": "3150:46:17" } ] }, "documentation": "@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": 2836, "implemented": true, "kind": "function", "modifiers": [], "name": "div", "nodeType": "FunctionDefinition", "parameters": { "id": 2825, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2822, "name": "a", "nodeType": "VariableDeclaration", "scope": 2836, "src": "3086:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2821, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3086:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2824, "name": "b", "nodeType": "VariableDeclaration", "scope": 2836, "src": "3097:9:17", 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"stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 2862, "nodeType": "Block", "src": "3813:243:17", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2850, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2848, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2840, "src": "3897:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 2849, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "3901:1:17", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "3897:5:17", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 2851, "name": "errorMessage", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2842, "src": "3904:12:17", "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": 2847, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 3599, 3600 ], "referencedDeclaration": 3600, "src": "3889:7:17", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2852, "isConstant": false, "isLValue": false, "isPure": false, "kind": 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"leftExpression": { "argumentTypes": null, "id": 2856, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2838, "src": "3939:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "/", "rightExpression": { "argumentTypes": null, "id": 2857, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2840, "src": "3943:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "3939:5:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "3927:17:17" }, { "expression": { "argumentTypes": null, "id": 2860, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2855, "src": "4048:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2846, "id": 2861, "nodeType": "Return", "src": "4041:8:17" } ] }, "documentation": "@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.\n * _Available since v2.4.0._", "id": 2863, "implemented": true, "kind": "function", "modifiers": [], "name": "div", "nodeType": "FunctionDefinition", "parameters": { "id": 2843, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2838, "name": "a", "nodeType": "VariableDeclaration", "scope": 2863, "src": "3731:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2837, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3731:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2840, "name": "b", "nodeType": "VariableDeclaration", "scope": 2863, "src": "3742:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2839, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3742:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2842, "name": "errorMessage", "nodeType": "VariableDeclaration", "scope": 2863, "src": "3753:26:17", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2841, "name": "string", "nodeType": "ElementaryTypeName", "src": "3753:6:17", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "3730:50:17" }, "returnParameters": { "id": 2846, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2845, "name": "", "nodeType": "VariableDeclaration", "scope": 2863, "src": "3804:7:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2844, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3804:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3803:9:17" }, "scope": 2903, "src": "3718:338:17", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 2878, "nodeType": "Block", "src": "4567:61:17", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2873, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2865, "src": "4588:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 2874, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2867, "src": "4591:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a206d6f64756c6f206279207a65726f", "id": 2875, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4594:26:17", "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": 2872, "name": "mod", "nodeType": "Identifier", "overloadedDeclarations": [ 2879, 2902 ], "referencedDeclaration": 2902, "src": "4584:3:17", "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": 2876, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4584:37:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2871, "id": 2877, "nodeType": "Return", "src": "4577:44:17" } ] }, "documentation": "@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": 2879, "implemented": true, "kind": "function", "modifiers": [], "name": "mod", "nodeType": "FunctionDefinition", "parameters": { "id": 2868, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2865, "name": "a", "nodeType": "VariableDeclaration", "scope": 2879, "src": "4513:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2864, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4513:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2867, "name": "b", "nodeType": "VariableDeclaration", "scope": 2879, "src": "4524:9:17", 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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.\n * _Available since v2.4.0._", "id": 2902, "implemented": true, "kind": "function", "modifiers": [], "name": "mod", "nodeType": "FunctionDefinition", "parameters": { "id": 2886, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2881, "name": "a", "nodeType": "VariableDeclaration", "scope": 2902, "src": "5145:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2880, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5145:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2883, "name": "b", "nodeType": "VariableDeclaration", "scope": 2902, "src": "5156:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2882, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5156:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2885, "name": "errorMessage", "nodeType": "VariableDeclaration", "scope": 2902, "src": "5167:26:17", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2884, "name": "string", "nodeType": "ElementaryTypeName", "src": "5167:6:17", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "5144:50:17" }, "returnParameters": { "id": 2889, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2888, "name": "", "nodeType": "VariableDeclaration", "scope": 2902, "src": "5218:7:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2887, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5218:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5217:9:17" }, "scope": 2903, "src": "5132:163:17", "stateMutability": "pure", "superFunction": null, "visibility": "internal" } ], "scope": 2904, "src": "589:4708:17" } ], "src": "0:5298:17" }, "legacyAST": { "absolutePath": "@openzeppelin/contracts/math/SafeMath.sol", "exportedSymbols": { "SafeMath": [ 2903 ] }, "id": 2904, "nodeType": "SourceUnit", "nodes": [ { "id": 2718, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:17" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": "@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": 2903, "linearizedBaseContracts": [ 2903 ], "name": "SafeMath", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 2742, "nodeType": "Block", "src": "901:109:17", "statements": [ { "assignments": [ 2728 ], "declarations": [ { "constant": false, "id": 2728, "name": "c", "nodeType": "VariableDeclaration", "scope": 2742, "src": "911:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2727, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "911:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 2732, "initialValue": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2731, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2729, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2720, "src": "923:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 2730, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2722, "src": "927:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "923:5:17", "typeDescriptions": { "typeIdentifier": "t_uint256", 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2743, "implemented": true, "kind": "function", "modifiers": [], "name": "add", "nodeType": "FunctionDefinition", "parameters": { "id": 2723, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2720, "name": "a", "nodeType": "VariableDeclaration", "scope": 2743, "src": "847:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2719, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "847:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2722, "name": "b", "nodeType": "VariableDeclaration", "scope": 2743, "src": "858:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2721, "name": "uint256", "nodeType": "ElementaryTypeName", "src": 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Reverts on\ndivision by zero. The result is rounded towards zero.\n * Counterpart to Solidity's `/` operator. 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"functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5237:29:17", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2896, "nodeType": "ExpressionStatement", "src": "5237:29:17" }, { "expression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2899, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2897, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2881, "src": "5283:1:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "%", "rightExpression": { "argumentTypes": null, "id": 2898, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2883, "src": "5287:1:17", "typeDescriptions": { "typeIdentifier": 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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.\n * _Available since v2.4.0._", "id": 2902, "implemented": true, "kind": "function", "modifiers": [], "name": "mod", "nodeType": "FunctionDefinition", "parameters": { "id": 2886, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2881, "name": "a", "nodeType": "VariableDeclaration", "scope": 2902, "src": "5145:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2880, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5145:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2883, "name": "b", "nodeType": "VariableDeclaration", "scope": 2902, "src": "5156:9:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2882, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5156:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2885, "name": "errorMessage", "nodeType": "VariableDeclaration", "scope": 2902, "src": "5167:26:17", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2884, "name": "string", "nodeType": "ElementaryTypeName", "src": "5167:6:17", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "5144:50:17" }, "returnParameters": { "id": 2889, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2888, "name": "", "nodeType": "VariableDeclaration", "scope": 2902, "src": "5218:7:17", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2887, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5218:7:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5217:9:17" }, "scope": 2903, "src": "5132:163:17", "stateMutability": "pure", "superFunction": null, "visibility": "internal" } ], "scope": 2904, "src": "589:4708:17" } ], "src": "0:5298:17" }, "compiler": { "name": "solc", "version": "0.5.16+commit.9c3226ce.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.0.20", "updatedAt": "2020-02-01T23:51:00.353Z", "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": {} } }