{ "contractName": "Strings", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.6.6+commit.6c089d02\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"String operations.\",\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/utils/Strings.sol\":\"Strings\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/utils/Strings.sol\":{\"keccak256\":\"0xd1d78b1c8534fbcf8fdc8fbfec9133df142ef8cae9ae820929dfe6d80d2c790a\",\"urls\":[\"bzz-raw://193a827fbe83fa83c4cabb172dc438dd45c50253858a1f2bf56e8f9a2d548386\",\"dweb:/ipfs/QmbWBHwHv7CyHSZY6jxnaDiHWGEEyVb8LeGdRpWXUjaiBr\"]}},\"version\":1}", "bytecode": "0x60566023600b82828239805160001a607314601657fe5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220b3b6a6635ca0dc943b3986ccf43be843b6eb97ed737ac5a7ffa09e818e83a72564736f6c63430006060033", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220b3b6a6635ca0dc943b3986ccf43be843b6eb97ed737ac5a7ffa09e818e83a72564736f6c63430006060033", "immutableReferences": {}, "sourceMap": "60:834:80:-: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": "60:834:80:-:0;;;;;;12:1:-1;9;2:12", "source": "pragma solidity ^0.6.0;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n /**\n * @dev Converts a `uint256` to its ASCII `string` representation.\n */\n function toString(uint256 value) internal pure returns (string memory) {\n // Inspired by OraclizeAPI's implementation - MIT licence\n // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n if (value == 0) {\n return \"0\";\n }\n uint256 temp = value;\n uint256 digits;\n while (temp != 0) {\n digits++;\n temp /= 10;\n }\n bytes memory buffer = new bytes(digits);\n uint256 index = digits - 1;\n temp = value;\n while (temp != 0) {\n buffer[index--] = byte(uint8(48 + temp % 10));\n temp /= 10;\n }\n return string(buffer);\n }\n}\n", "sourcePath": "@openzeppelin/contracts/utils/Strings.sol", "ast": { "absolutePath": "@openzeppelin/contracts/utils/Strings.sol", "exportedSymbols": { "Strings": [ 13440 ] }, "id": 13441, "nodeType": "SourceUnit", "nodes": [ { "id": 13355, "literals": [ "solidity", "^", "0.6", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:80" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": { "id": 13356, "nodeType": "StructuredDocumentation", "src": "25:34:80", "text": "@dev String operations." }, "fullyImplemented": true, "id": 13440, "linearizedBaseContracts": [ 13440 ], "name": "Strings", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 13438, "nodeType": "Block", "src": "240:652:80", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 13366, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 13364, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13359, "src": "442:5:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 13365, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "451:1:80", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "442:10:80", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 13370, "nodeType": "IfStatement", "src": "438:51:80", "trueBody": { "id": 13369, "nodeType": "Block", "src": "454:35:80", "statements": [ { "expression": { "argumentTypes": null, "hexValue": "30", "id": 13367, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "475:3:80", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_044852b2a670ade5407e78fb2863c51de9fcb96542a07186fe3aeda6bb8a116d", "typeString": "literal_string \"0\"" }, "value": "0" }, "functionReturnParameters": 13363, "id": 13368, "nodeType": "Return", "src": "468:10:80" } ] } }, { "assignments": [ 13372 ], "declarations": [ { "constant": false, "id": 13372, "mutability": "mutable", "name": "temp", "nodeType": "VariableDeclaration", "overrides": null, "scope": 13438, "src": "498:12:80", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 13371, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "498:7:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 13374, "initialValue": { "argumentTypes": null, "id": 13373, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13359, "src": "513:5:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "498:20:80" }, { "assignments": [ 13376 ], "declarations": [ { "constant": false, "id": 13376, "mutability": "mutable", "name": "digits", "nodeType": "VariableDeclaration", "overrides": null, "scope": 13438, "src": "528:14:80", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 13375, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "528:7:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 13377, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "528:14:80" }, { "body": { "id": 13388, "nodeType": "Block", "src": "570:57:80", "statements": [ { "expression": { "argumentTypes": null, "id": 13382, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "++", "prefix": false, "src": "584:8:80", "subExpression": { "argumentTypes": null, "id": 13381, "name": "digits", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13376, "src": "584:6:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 13383, "nodeType": "ExpressionStatement", "src": "584:8:80" }, { "expression": { "argumentTypes": null, "id": 13386, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 13384, "name": "temp", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13372, "src": "606:4:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "/=", "rightHandSide": { "argumentTypes": null, "hexValue": "3130", "id": 13385, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "614:2:80", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_10_by_1", "typeString": "int_const 10" }, "value": "10" }, "src": "606:10:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 13387, "nodeType": "ExpressionStatement", "src": "606:10:80" } ] }, "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 13380, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 13378, "name": "temp", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13372, "src": "559:4:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 13379, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "567:1:80", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "559:9:80", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 13389, "nodeType": "WhileStatement", "src": "552:75:80" }, { "assignments": [ 13391 ], "declarations": [ { "constant": false, "id": 13391, "mutability": "mutable", "name": "buffer", "nodeType": "VariableDeclaration", "overrides": null, "scope": 13438, "src": "636:19:80", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 13390, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "636:5:80", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 13396, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 13394, "name": "digits", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13376, "src": "668:6:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 13393, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "NewExpression", "src": "658:9:80", "typeDescriptions": { "typeIdentifier": "t_function_objectcreation_pure$_t_uint256_$returns$_t_bytes_memory_ptr_$", "typeString": "function (uint256) pure returns (bytes memory)" }, "typeName": { "id": 13392, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "662:5:80", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } } }, "id": 13395, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "658:17:80", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "nodeType": "VariableDeclarationStatement", "src": "636:39:80" }, { "assignments": [ 13398 ], "declarations": [ { "constant": false, "id": 13398, "mutability": "mutable", "name": "index", "nodeType": "VariableDeclaration", "overrides": null, "scope": 13438, "src": "685:13:80", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 13397, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "685:7:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 13402, "initialValue": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 13401, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 13399, "name": "digits", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13376, "src": "701:6:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "argumentTypes": null, "hexValue": "31", "id": 13400, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "710:1:80", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "701:10:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "685:26:80" }, { "expression": { "argumentTypes": null, "id": 13405, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 13403, "name": "temp", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13372, "src": "721:4:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 13404, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13359, "src": "728:5:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "721:12:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 13406, "nodeType": "ExpressionStatement", "src": "721:12:80" }, { "body": { "id": 13431, "nodeType": "Block", "src": "761:94:80", "statements": [ { "expression": { "argumentTypes": null, "id": 13425, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 13410, "name": "buffer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13391, "src": "775:6:80", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 13413, "indexExpression": { "argumentTypes": null, "id": 13412, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "--", "prefix": false, "src": "782:7:80", "subExpression": { "argumentTypes": null, "id": 13411, "name": "index", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13398, "src": "782:5:80", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "775:15:80", "typeDescriptions": { "typeIdentifier": "t_bytes1", "typeString": "bytes1" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 13422, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "hexValue": "3438", "id": 13418, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "804:2:80", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_48_by_1", "typeString": "int_const 48" }, "value": "48" }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 13421, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 13419, "name": "temp", 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}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 13408, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "758:1:80", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "750:9:80", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 13432, "nodeType": "WhileStatement", "src": "743:112:80" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 13435, "name": "buffer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 13391, "src": "878:6:80", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 13434, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "871:6:80", "typeDescriptions": { "typeIdentifier": "t_type$_t_string_storage_ptr_$", "typeString": "type(string storage pointer)" }, "typeName": { "id": 13433, "name": "string", "nodeType": "ElementaryTypeName", "src": "871:6:80", "typeDescriptions": { "typeIdentifier": null, "typeString": null } } }, "id": 13436, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "871:14:80", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "functionReturnParameters": 13363, "id": 13437, "nodeType": "Return", "src": "864:21:80" } ] }, "documentation": { "id": 13357, "nodeType": "StructuredDocumentation", "src": "82:82:80", "text": "@dev Converts a `uint256` to its ASCII `string` 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