{ "contractName": "Strings", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.8.7+commit.e28d00a7\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"String operations.\",\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/utils/Strings.sol\":\"Strings\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/utils/Strings.sol\":{\"keccak256\":\"0xaf159a8b1923ad2a26d516089bceca9bdeaeacd04be50983ea00ba63070f08a3\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://6f2cf1c531122bc7ca96b8c8db6a60deae60441e5223065e792553d4849b5638\",\"dweb:/ipfs/QmPBdJmBBABMDCfyDjCbdxgiqRavgiSL88SYPGibgbPas9\"]}},\"version\":1}", "bytecode": "0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220841227ceec917adeb05ff8c6dc5d18499b87316fa81ffa997ae136a1e874b02064736f6c63430008070033", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220841227ceec917adeb05ff8c6dc5d18499b87316fa81ffa997ae136a1e874b02064736f6c63430008070033", "immutableReferences": {}, "sourceMap": "161:2235:56:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;161:2235:56;;;;;;;;;;;;;;;;;", "deployedSourceMap": "161:2235:56:-:0;;;;;;;;", "source": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\n uint8 private constant _ADDRESS_LENGTH = 20;\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` decimal 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 while (value != 0) {\n digits -= 1;\n buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n value /= 10;\n }\n return string(buffer);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n */\n function toHexString(uint256 value) internal pure returns (string memory) {\n if (value == 0) {\n return \"0x00\";\n }\n uint256 temp = value;\n uint256 length = 0;\n while (temp != 0) {\n length++;\n temp >>= 8;\n }\n return toHexString(value, length);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n */\n function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n bytes memory buffer = new bytes(2 * length + 2);\n buffer[0] = \"0\";\n buffer[1] = \"x\";\n for (uint256 i = 2 * length + 1; i > 1; --i) {\n buffer[i] = _HEX_SYMBOLS[value & 0xf];\n value >>= 4;\n }\n require(value == 0, \"Strings: hex length insufficient\");\n return string(buffer);\n }\n\n /**\n * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.\n */\n function toHexString(address addr) internal pure returns (string memory) {\n return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);\n }\n}\n", "sourcePath": "@openzeppelin/contracts/utils/Strings.sol", "ast": { "absolutePath": "@openzeppelin/contracts/utils/Strings.sol", "exportedSymbols": { "Strings": [ 11734 ] }, "id": 11735, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 11510, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "101:23:56" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": { "id": 11511, "nodeType": "StructuredDocumentation", "src": "126:34:56", "text": " @dev String operations." }, "fullyImplemented": true, "id": 11734, "linearizedBaseContracts": [ 11734 ], "name": "Strings", "nameLocation": "169:7:56", "nodeType": "ContractDefinition", "nodes": [ { "constant": true, "id": 11514, "mutability": "constant", "name": "_HEX_SYMBOLS", "nameLocation": "208:12:56", "nodeType": "VariableDeclaration", "scope": 11734, "src": "183:58:56", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes16", "typeString": "bytes16" }, "typeName": { "id": 11512, "name": "bytes16", "nodeType": "ElementaryTypeName", "src": "183:7:56", "typeDescriptions": { "typeIdentifier": "t_bytes16", "typeString": "bytes16" } }, "value": { "hexValue": "30313233343536373839616263646566", "id": 11513, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "223:18:56", "typeDescriptions": { "typeIdentifier": "t_stringliteral_cb29997ed99ead0db59ce4d12b7d3723198c827273e5796737c926d78019c39f", "typeString": "literal_string \"0123456789abcdef\"" }, "value": "0123456789abcdef" }, "visibility": "private" }, { "constant": true, "id": 11517, "mutability": "constant", "name": "_ADDRESS_LENGTH", "nameLocation": "270:15:56", "nodeType": "VariableDeclaration", "scope": 11734, "src": "247:43:56", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 11515, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "247:5:56", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": { "hexValue": "3230", "id": 11516, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "288:2:56", "typeDescriptions": { "typeIdentifier": "t_rational_20_by_1", "typeString": "int_const 20" }, "value": "20" }, "visibility": "private" }, { "body": { "id": 11595, "nodeType": "Block", "src": "463:632:56", "statements": [ { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 11527, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 11525, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11520, "src": "665:5:56", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 11526, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, 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"729:4:56", "nodeType": "VariableDeclaration", "scope": 11595, "src": "721:12:56", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11532, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "721:7:56", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 11535, "initialValue": { "id": 11534, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11520, "src": "736:5:56", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "721:20:56" }, { "assignments": [ 11537 ], "declarations": [ { "constant": false, "id": 11537, "mutability": "mutable", "name": "digits", "nameLocation": "759:6:56", "nodeType": "VariableDeclaration", "scope": 11595, "src": "751:14:56", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11536, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "751:7:56", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 11538, "nodeType": "VariableDeclarationStatement", "src": "751:14:56" }, { "body": { "id": 11549, "nodeType": "Block", "src": "793:57:56", "statements": [ { "expression": { "id": 11543, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "++", "prefix": false, "src": "807:8:56", "subExpression": { "id": 11542, "name": "digits", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11537, "src": "807:6:56", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, 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"typeIdentifier": "t_function_objectcreation_pure$_t_uint256_$returns$_t_bytes_memory_ptr_$", "typeString": "function (uint256) pure returns (bytes memory)" }, "typeName": { "id": 11553, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "885:5:56", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } } }, "id": 11556, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "881:17:56", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "nodeType": "VariableDeclarationStatement", "src": "859:39:56" }, { "body": { "id": 11588, "nodeType": "Block", "src": "927:131:56", "statements": [ { "expression": { "id": 11563, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 11561, "name": "digits", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11537, "src": "941:6:56", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "hexValue": "31", "id": 11562, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "951:1:56", "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "src": "941:11:56", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 11564, "nodeType": "ExpressionStatement", "src": "941:11:56" }, { "expression": { "id": 11582, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 11565, "name": "buffer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11552, "src": "966:6:56", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 11567, "indexExpression": { "id": 11566, "name": "digits", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11537, "src": "973:6:56", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "966:14:56", "typeDescriptions": { "typeIdentifier": "t_bytes1", "typeString": "bytes1" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "arguments": [ { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 11579, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "hexValue": "3438", "id": 11572, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "996:2:56", 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