{ "contractName": "SafeMath", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.5.12+commit.7709ece9\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Wrappers over Solidity's arithmetic operations with added overflow checks. * Arithmetic operations in Solidity wrap on overflow. 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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 * - The divisor cannot be zero.\n *\n * _Available since v2.4.0._\n */\n function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n // Solidity only automatically asserts when dividing by 0\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. 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"SafeMath: multiplication overflow" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_9113bb53c2876a3805b2c9242029423fc540a728243ce887ab24c82cf119fba3", "typeString": "literal_string \"SafeMath: multiplication overflow\"" } ], "id": 10759, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 11488, 11489 ], "referencedDeclaration": 11489, "src": "2536:7:33", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 10766, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2536:56:33", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10767, "nodeType": "ExpressionStatement", "src": "2536:56:33" }, { "expression": { "argumentTypes": null, "id": 10768, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10754, "src": "2610:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10745, "id": 10769, "nodeType": "Return", "src": "2603:8:33" } ] }, "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": 10771, "implemented": true, "kind": "function", "modifiers": [], "name": "mul", "nodeType": "FunctionDefinition", "parameters": { "id": 10742, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10739, "name": "a", "nodeType": "VariableDeclaration", "scope": 10771, "src": "2172:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10738, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2172:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10741, "name": "b", "nodeType": "VariableDeclaration", "scope": 10771, "src": "2183:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10740, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2183:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2171:22:33" }, "returnParameters": { "id": 10745, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10744, "name": "", "nodeType": "VariableDeclaration", "scope": 10771, "src": "2217:7:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10743, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2217:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2216:9:33" }, "scope": 10854, "src": "2159:459:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 10786, "nodeType": "Block", "src": "3140:63:33", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 10781, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10773, "src": "3161:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 10782, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10775, "src": "3164:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a206469766973696f6e206279207a65726f", "id": 10783, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3167:28:33", "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": 10780, "name": "div", "nodeType": "Identifier", "overloadedDeclarations": [ 10787, 10814 ], "referencedDeclaration": 10814, "src": "3157:3:33", "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": 10784, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3157:39:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10779, "id": 10785, "nodeType": "Return", "src": "3150:46:33" } ] }, "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": 10787, "implemented": true, "kind": "function", "modifiers": [], "name": "div", "nodeType": "FunctionDefinition", "parameters": { "id": 10776, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10773, "name": "a", "nodeType": "VariableDeclaration", "scope": 10787, "src": "3086:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10772, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3086:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10775, "name": "b", "nodeType": "VariableDeclaration", "scope": 10787, "src": "3097:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10774, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3097:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3085:22:33" }, "returnParameters": { "id": 10779, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10778, "name": "", "nodeType": "VariableDeclaration", "scope": 10787, "src": "3131:7:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10777, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3131:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3130:9:33" }, "scope": 10854, "src": "3073:130:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 10813, "nodeType": "Block", "src": "3813:243:33", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10801, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 10799, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10791, "src": "3897:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 10800, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "3901:1:33", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "3897:5:33", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 10802, "name": "errorMessage", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10793, "src": "3904:12:33", "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": 10798, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 11488, 11489 ], "referencedDeclaration": 11489, "src": "3889:7:33", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 10803, "isConstant": false, "isLValue": false, 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false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 10807, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10789, "src": "3939:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "/", "rightExpression": { "argumentTypes": null, "id": 10808, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10791, "src": "3943:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "3939:5:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "3927:17:33" }, { "expression": { "argumentTypes": null, "id": 10811, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10806, "src": "4048:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10797, "id": 10812, "nodeType": "Return", "src": "4041:8:33" } ] }, "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": 10814, "implemented": true, "kind": "function", "modifiers": [], "name": "div", "nodeType": "FunctionDefinition", "parameters": { "id": 10794, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10789, "name": "a", "nodeType": "VariableDeclaration", "scope": 10814, "src": "3731:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10788, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3731:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10791, "name": "b", "nodeType": "VariableDeclaration", "scope": 10814, "src": "3742:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10790, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3742:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10793, "name": "errorMessage", "nodeType": "VariableDeclaration", "scope": 10814, "src": "3753:26:33", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 10792, "name": "string", "nodeType": "ElementaryTypeName", "src": "3753:6:33", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "3730:50:33" }, "returnParameters": { "id": 10797, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10796, "name": "", "nodeType": "VariableDeclaration", "scope": 10814, "src": "3804:7:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10795, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3804:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3803:9:33" }, "scope": 10854, "src": "3718:338:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 10829, "nodeType": "Block", "src": "4567:61:33", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 10824, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10816, "src": "4588:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 10825, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10818, "src": "4591:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a206d6f64756c6f206279207a65726f", "id": 10826, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4594:26:33", "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": 10823, "name": "mod", "nodeType": "Identifier", "overloadedDeclarations": [ 10830, 10853 ], "referencedDeclaration": 10853, "src": "4584:3:33", "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": 10827, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4584:37:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10822, "id": 10828, "nodeType": "Return", "src": "4577:44:33" } ] }, "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": 10830, "implemented": true, "kind": "function", "modifiers": [], "name": "mod", "nodeType": "FunctionDefinition", "parameters": { "id": 10819, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10816, "name": "a", "nodeType": "VariableDeclaration", "scope": 10830, "src": "4513:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10815, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4513:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10818, "name": "b", "nodeType": "VariableDeclaration", "scope": 10830, "src": "4524:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10817, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4524:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4512:22:33" }, "returnParameters": { "id": 10822, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10821, "name": "", "nodeType": "VariableDeclaration", "scope": 10830, "src": "4558:7:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10820, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4558:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4557:9:33" }, "scope": 10854, "src": "4500:128:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 10852, "nodeType": "Block", "src": "5227:68:33", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10844, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 10842, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10834, "src": "5245:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 10843, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5250:1:33", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "5245:6:33", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 10845, "name": "errorMessage", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10836, "src": "5253:12:33", "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": 10841, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 11488, 11489 ], "referencedDeclaration": 11489, "src": "5237:7:33", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 10846, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5237:29:33", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10847, "nodeType": "ExpressionStatement", "src": "5237:29:33" }, { "expression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10850, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 10848, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10832, "src": "5283:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "%", "rightExpression": { "argumentTypes": null, "id": 10849, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10834, "src": "5287:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "5283:5:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10840, "id": 10851, "nodeType": "Return", "src": "5276:12:33" } ] }, "documentation": "@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.\n * _Available since v2.4.0._", "id": 10853, "implemented": true, "kind": "function", "modifiers": [], "name": "mod", "nodeType": "FunctionDefinition", "parameters": { "id": 10837, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10832, "name": "a", "nodeType": "VariableDeclaration", "scope": 10853, "src": "5145:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10831, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5145:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10834, "name": "b", "nodeType": "VariableDeclaration", "scope": 10853, "src": "5156:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10833, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5156:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10836, "name": "errorMessage", "nodeType": "VariableDeclaration", "scope": 10853, "src": "5167:26:33", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 10835, "name": "string", "nodeType": "ElementaryTypeName", "src": "5167:6:33", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "5144:50:33" }, "returnParameters": { "id": 10840, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10839, "name": "", "nodeType": "VariableDeclaration", "scope": 10853, "src": "5218:7:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10838, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5218:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5217:9:33" }, "scope": 10854, "src": "5132:163:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" } ], "scope": 10855, "src": "589:4708:33" } ], "src": "0:5298:33" }, "legacyAST": { "absolutePath": "@openzeppelin/contracts/math/SafeMath.sol", "exportedSymbols": { "SafeMath": [ 10854 ] }, "id": 10855, "nodeType": "SourceUnit", "nodes": [ { "id": 10669, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:33" }, { "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": 10854, "linearizedBaseContracts": [ 10854 ], "name": "SafeMath", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 10693, "nodeType": "Block", "src": "901:109:33", "statements": [ { "assignments": [ 10679 ], "declarations": [ { "constant": false, "id": 10679, "name": "c", "nodeType": "VariableDeclaration", "scope": 10693, "src": "911:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10678, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "911:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 10683, "initialValue": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10682, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 10680, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10671, "src": "923:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 10681, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10673, "src": "927:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "923:5:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "911:17:33" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10687, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 10685, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10679, "src": "946:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "argumentTypes": null, "id": 10686, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10671, "src": "951:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "946:6:33", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a206164646974696f6e206f766572666c6f77", "id": 10688, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "954:29:33", "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": 10684, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 11488, 11489 ], "referencedDeclaration": 11489, "src": "938:7:33", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 10689, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "938:46:33", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10690, "nodeType": "ExpressionStatement", "src": "938:46:33" }, { "expression": { "argumentTypes": null, "id": 10691, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10679, "src": "1002:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10677, "id": 10692, "nodeType": "Return", "src": "995:8:33" } ] }, "documentation": "@dev Returns the addition of two unsigned integers, reverting on\noverflow.\n * Counterpart to Solidity's `+` operator.\n * Requirements:\n- Addition cannot overflow.", "id": 10694, "implemented": true, "kind": "function", "modifiers": [], "name": "add", "nodeType": "FunctionDefinition", "parameters": { "id": 10674, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10671, "name": "a", "nodeType": "VariableDeclaration", "scope": 10694, "src": "847:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10670, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "847:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10673, "name": "b", "nodeType": "VariableDeclaration", "scope": 10694, "src": "858:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10672, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "858:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "846:22:33" }, "returnParameters": { "id": 10677, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10676, "name": "", "nodeType": "VariableDeclaration", "scope": 10694, "src": "892:7:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10675, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "892:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "891:9:33" }, "scope": 10854, "src": "834:176:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 10709, "nodeType": "Block", "src": "1341:67:33", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 10704, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10696, "src": "1362:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 10705, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10698, "src": "1365:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a207375627472616374696f6e206f766572666c6f77", "id": 10706, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1368:32:33", "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": 10703, "name": "sub", "nodeType": "Identifier", "overloadedDeclarations": [ 10710, 10737 ], "referencedDeclaration": 10737, "src": "1358:3:33", "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": 10707, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1358:43:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10702, "id": 10708, "nodeType": "Return", "src": "1351:50:33" } ] }, "documentation": "@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": 10710, "implemented": true, "kind": "function", "modifiers": [], "name": "sub", "nodeType": "FunctionDefinition", "parameters": { "id": 10699, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10696, "name": "a", "nodeType": "VariableDeclaration", "scope": 10710, "src": "1287:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10695, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1287:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { 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"typeString": "uint256" }, "typeName": { "id": 10743, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2217:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2216:9:33" }, "scope": 10854, "src": "2159:459:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 10786, "nodeType": "Block", "src": "3140:63:33", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 10781, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10773, "src": "3161:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 10782, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10775, "src": "3164:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": 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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": 10787, "implemented": true, "kind": "function", "modifiers": [], "name": "div", "nodeType": "FunctionDefinition", "parameters": { "id": 10776, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10773, "name": "a", "nodeType": "VariableDeclaration", "scope": 10787, "src": "3086:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10772, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3086:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10775, "name": "b", "nodeType": "VariableDeclaration", "scope": 10787, "src": 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false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 10807, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10789, "src": "3939:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "/", "rightExpression": { "argumentTypes": null, "id": 10808, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10791, "src": "3943:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "3939:5:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "3927:17:33" }, { "expression": { "argumentTypes": null, "id": 10811, "name": "c", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10806, "src": "4048:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10797, "id": 10812, "nodeType": "Return", "src": "4041:8:33" } ] }, "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": 10814, "implemented": true, "kind": "function", "modifiers": [], "name": "div", "nodeType": "FunctionDefinition", "parameters": { "id": 10794, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10789, "name": "a", "nodeType": "VariableDeclaration", "scope": 10814, "src": "3731:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10788, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3731:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10791, "name": "b", "nodeType": "VariableDeclaration", "scope": 10814, "src": "3742:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10790, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3742:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10793, "name": "errorMessage", "nodeType": "VariableDeclaration", "scope": 10814, "src": "3753:26:33", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 10792, "name": "string", "nodeType": "ElementaryTypeName", "src": "3753:6:33", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "3730:50:33" }, "returnParameters": { "id": 10797, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10796, "name": "", "nodeType": "VariableDeclaration", "scope": 10814, "src": "3804:7:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10795, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3804:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3803:9:33" }, "scope": 10854, "src": "3718:338:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 10829, "nodeType": "Block", "src": "4567:61:33", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 10824, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10816, "src": "4588:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 10825, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10818, "src": "4591:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "536166654d6174683a206d6f64756c6f206279207a65726f", "id": 10826, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4594:26:33", "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": 10823, "name": "mod", "nodeType": "Identifier", "overloadedDeclarations": [ 10830, 10853 ], "referencedDeclaration": 10853, "src": "4584:3:33", "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": 10827, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4584:37:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10822, "id": 10828, "nodeType": "Return", "src": "4577:44:33" } ] }, "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": 10830, "implemented": true, "kind": "function", "modifiers": [], "name": "mod", "nodeType": "FunctionDefinition", "parameters": { "id": 10819, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10816, "name": "a", "nodeType": "VariableDeclaration", "scope": 10830, "src": "4513:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10815, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4513:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10818, "name": "b", "nodeType": "VariableDeclaration", "scope": 10830, "src": "4524:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10817, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4524:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4512:22:33" }, "returnParameters": { "id": 10822, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10821, "name": "", "nodeType": "VariableDeclaration", "scope": 10830, "src": "4558:7:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10820, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4558:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4557:9:33" }, "scope": 10854, "src": "4500:128:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 10852, "nodeType": "Block", "src": "5227:68:33", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10844, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 10842, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10834, "src": "5245:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 10843, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5250:1:33", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "5245:6:33", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 10845, "name": "errorMessage", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10836, "src": "5253:12:33", "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": 10841, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 11488, 11489 ], "referencedDeclaration": 11489, "src": "5237:7:33", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 10846, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5237:29:33", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10847, "nodeType": "ExpressionStatement", "src": "5237:29:33" }, { "expression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10850, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 10848, "name": "a", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10832, "src": "5283:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "%", "rightExpression": { "argumentTypes": null, "id": 10849, "name": "b", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10834, "src": "5287:1:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "5283:5:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 10840, "id": 10851, "nodeType": "Return", "src": "5276:12:33" } ] }, "documentation": "@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.\n * _Available since v2.4.0._", "id": 10853, "implemented": true, "kind": "function", "modifiers": [], "name": "mod", "nodeType": "FunctionDefinition", "parameters": { "id": 10837, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10832, "name": "a", "nodeType": "VariableDeclaration", "scope": 10853, "src": "5145:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10831, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5145:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10834, "name": "b", "nodeType": "VariableDeclaration", "scope": 10853, "src": "5156:9:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10833, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5156:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10836, "name": "errorMessage", "nodeType": "VariableDeclaration", "scope": 10853, "src": "5167:26:33", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 10835, "name": "string", "nodeType": "ElementaryTypeName", "src": "5167:6:33", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "5144:50:33" }, "returnParameters": { "id": 10840, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10839, "name": "", "nodeType": "VariableDeclaration", "scope": 10853, "src": "5218:7:33", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10838, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5218:7:33", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "5217:9:33" }, "scope": 10854, "src": "5132:163:33", "stateMutability": "pure", "superFunction": null, "visibility": "internal" } ], "scope": 10855, "src": "589:4708:33" } ], "src": "0:5298:33" }, "compiler": { "name": "solc", "version": "0.5.12+commit.7709ece9.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.0.21", "updatedAt": "2020-04-22T17:31:54.569Z", "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": {} } }