{ "contractName": "BytesUtils", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.5.8+commit.23d335f2\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"@ensdomains/dnssec-oracle/contracts/BytesUtils.sol\":\"BytesUtils\"},\"evmVersion\":\"petersburg\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"@ensdomains/dnssec-oracle/contracts/BytesUtils.sol\":{\"keccak256\":\"0x4014e689ef4a36cbf7103d88286abd2a7c560c2a7af99a561c33c61bc78be27a\",\"urls\":[\"bzzr://adf984996598f1e0d446eea1eda14ed2c49ab86a4ea1ae837cf4f9d99556b9c2\"]}},\"version\":1}", "bytecode": "0x604c6023600b82828239805160001a607314601657fe5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a723058209cb2fae657abd7bbf53ba4c068c3a9b2458d8b09efdc976d7e52b57a93475c7b0029", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a723058209cb2fae657abd7bbf53ba4c068c3a9b2458d8b09efdc976d7e52b57a93475c7b0029", "sourceMap": "26:11040:22:-;;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": "26:11040:22:-;;;;;;;;", "source": "pragma solidity >0.4.23;\n\nlibrary BytesUtils {\n /*\n * @dev Returns the keccak-256 hash of a byte range.\n * @param self The byte string to hash.\n * @param offset The position to start hashing at.\n * @param len The number of bytes to hash.\n * @return The hash of the byte range.\n */\n function keccak(bytes memory self, uint offset, uint len) internal pure returns (bytes32 ret) {\n require(offset + len <= self.length);\n assembly {\n ret := keccak256(add(add(self, 32), offset), len)\n }\n }\n\n\n /*\n * @dev Returns a positive number if `other` comes lexicographically after\n * `self`, a negative number if it comes before, or zero if the\n * contents of the two bytes are equal.\n * @param self The first bytes to compare.\n * @param other The second bytes to compare.\n * @return The result of the comparison.\n */\n function compare(bytes memory self, bytes memory other) internal pure returns (int) {\n return compare(self, 0, self.length, other, 0, other.length);\n }\n\n /*\n * @dev Returns a positive number if `other` comes lexicographically after\n * `self`, a negative number if it comes before, or zero if the\n * contents of the two bytes are equal. Comparison is done per-rune,\n * on unicode codepoints.\n * @param self The first bytes to compare.\n * @param offset The offset of self.\n * @param len The length of self.\n * @param other The second bytes to compare.\n * @param otheroffset The offset of the other string.\n * @param otherlen The length of the other string.\n * @return The result of the comparison.\n */\n function compare(bytes memory self, uint offset, uint len, bytes memory other, uint otheroffset, uint otherlen) internal pure returns (int) {\n uint shortest = len;\n if (otherlen < len)\n shortest = otherlen;\n\n uint selfptr;\n uint otherptr;\n\n assembly {\n selfptr := add(self, add(offset, 32))\n otherptr := add(other, add(otheroffset, 32))\n }\n for (uint idx = 0; idx < shortest; idx += 32) {\n uint a;\n uint b;\n assembly {\n a := mload(selfptr)\n b := mload(otherptr)\n }\n if (a != b) {\n // Mask out irrelevant bytes and check again\n uint mask;\n if (shortest > 32) {\n mask = uint256(- 1); // aka 0xffffff....\n } else {\n mask = ~(2 ** (8 * (32 - shortest + idx)) - 1);\n }\n uint diff = (a & mask) - (b & mask);\n if (diff != 0)\n return int(diff);\n }\n selfptr += 32;\n otherptr += 32;\n }\n\n return int(len) - int(otherlen);\n }\n\n /*\n * @dev Returns true if the two byte ranges are equal.\n * @param self The first byte range to compare.\n * @param offset The offset into the first byte range.\n * @param other The second byte range to compare.\n * @param otherOffset The offset into the second byte range.\n * @param len The number of bytes to compare\n * @return True if the byte ranges are equal, false otherwise.\n */\n function equals(bytes memory self, uint offset, bytes memory other, uint otherOffset, uint len) internal pure returns (bool) {\n return keccak(self, offset, len) == keccak(other, otherOffset, len);\n }\n\n /*\n * @dev Returns true if the two byte ranges are equal with offsets.\n * @param self The first byte range to compare.\n * @param offset The offset into the first byte range.\n * @param other The second byte range to compare.\n * @param otherOffset The offset into the second byte range.\n * @return True if the byte ranges are equal, false otherwise.\n */\n function equals(bytes memory self, uint offset, bytes memory other, uint otherOffset) internal pure returns (bool) {\n return keccak(self, offset, self.length - offset) == keccak(other, otherOffset, other.length - otherOffset);\n }\n\n /*\n * @dev Compares a range of 'self' to all of 'other' and returns True iff\n * they are equal.\n * @param self The first byte range to compare.\n * @param offset The offset into the first byte range.\n * @param other The second byte range to compare.\n * @return True if the byte ranges are equal, false otherwise.\n */\n function equals(bytes memory self, uint offset, bytes memory other) internal pure returns (bool) {\n return self.length >= offset + other.length && equals(self, offset, other, 0, other.length);\n }\n\n /*\n * @dev Returns true if the two byte ranges are equal.\n * @param self The first byte range to compare.\n * @param other The second byte range to compare.\n * @return True if the byte ranges are equal, false otherwise.\n */\n function equals(bytes memory self, bytes memory other) internal pure returns(bool) {\n return self.length == other.length && equals(self, 0, other, 0, self.length);\n }\n\n /*\n * @dev Returns the 8-bit number at the specified index of self.\n * @param self The byte string.\n * @param idx The index into the bytes\n * @return The specified 8 bits of the string, interpreted as an integer.\n */\n function readUint8(bytes memory self, uint idx) internal pure returns (uint8 ret) {\n return uint8(self[idx]);\n }\n\n /*\n * @dev Returns the 16-bit number at the specified index of self.\n * @param self The byte string.\n * @param idx The index into the bytes\n * @return The specified 16 bits of the string, interpreted as an integer.\n */\n function readUint16(bytes memory self, uint idx) internal pure returns (uint16 ret) {\n require(idx + 2 <= self.length);\n assembly {\n ret := and(mload(add(add(self, 2), idx)), 0xFFFF)\n }\n }\n\n /*\n * @dev Returns the 32-bit number at the specified index of self.\n * @param self The byte string.\n * @param idx The index into the bytes\n * @return The specified 32 bits of the string, interpreted as an integer.\n */\n function readUint32(bytes memory self, uint idx) internal pure returns (uint32 ret) {\n require(idx + 4 <= self.length);\n assembly {\n ret := and(mload(add(add(self, 4), idx)), 0xFFFFFFFF)\n }\n }\n\n /*\n * @dev Returns the 32 byte value at the specified index of self.\n * @param self The byte string.\n * @param idx The index into the bytes\n * @return The specified 32 bytes of the string.\n */\n function readBytes32(bytes memory self, uint idx) internal pure returns (bytes32 ret) {\n require(idx + 32 <= self.length);\n assembly {\n ret := mload(add(add(self, 32), idx))\n }\n }\n\n /*\n * @dev Returns the 32 byte value at the specified index of self.\n * @param self The byte string.\n * @param idx The index into the bytes\n * @return The specified 32 bytes of the string.\n */\n function readBytes20(bytes memory self, uint idx) internal pure returns (bytes20 ret) {\n require(idx + 20 <= self.length);\n assembly {\n ret := and(mload(add(add(self, 32), idx)), 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000000)\n }\n }\n\n /*\n * @dev Returns the n byte value at the specified index of self.\n * @param self The byte string.\n * @param idx The index into the bytes.\n * @param len The number of bytes.\n * @return The specified 32 bytes of the string.\n */\n function readBytesN(bytes memory self, uint idx, uint len) internal pure returns (bytes32 ret) {\n require(len <= 32);\n require(idx + len <= self.length);\n assembly {\n let mask := not(sub(exp(256, sub(32, len)), 1))\n ret := and(mload(add(add(self, 32), idx)), mask)\n }\n }\n\n function memcpy(uint dest, uint src, uint len) private pure {\n // Copy word-length chunks while possible\n for (; len >= 32; len -= 32) {\n assembly {\n mstore(dest, mload(src))\n }\n dest += 32;\n src += 32;\n }\n\n // Copy remaining bytes\n uint mask = 256 ** (32 - len) - 1;\n assembly {\n let srcpart := and(mload(src), not(mask))\n let destpart := and(mload(dest), mask)\n mstore(dest, or(destpart, srcpart))\n }\n }\n\n /*\n * @dev Copies a substring into a new byte string.\n * @param self The byte string to copy from.\n * @param offset The offset to start copying at.\n * @param len The number of bytes to copy.\n */\n function substring(bytes memory self, uint offset, uint len) internal pure returns(bytes memory) {\n require(offset + len <= self.length);\n\n bytes memory ret = new bytes(len);\n uint dest;\n uint src;\n\n assembly {\n dest := add(ret, 32)\n src := add(add(self, 32), offset)\n }\n memcpy(dest, src, len);\n\n return ret;\n }\n\n // Maps characters from 0x30 to 0x7A to their base32 values.\n // 0xFF represents invalid characters in that range.\n bytes constant base32HexTable = hex'00010203040506070809FFFFFFFFFFFFFF0A0B0C0D0E0F101112131415161718191A1B1C1D1E1FFFFFFFFFFFFFFFFFFFFF0A0B0C0D0E0F101112131415161718191A1B1C1D1E1F';\n\n /**\n * @dev Decodes unpadded base32 data of up to one word in length.\n * @param self The data to decode.\n * @param off Offset into the string to start at.\n * @param len Number of characters to decode.\n * @return The decoded data, left aligned.\n */\n function base32HexDecodeWord(bytes memory self, uint off, uint len) internal pure returns(bytes32) {\n require(len <= 52);\n\n uint ret = 0;\n uint8 decoded;\n for(uint i = 0; i < len; i++) {\n bytes1 char = self[off + i];\n require(char >= 0x30 && char <= 0x7A);\n decoded = uint8(base32HexTable[uint(uint8(char)) - 0x30]);\n require(decoded <= 0x20);\n if(i == len - 1) {\n break;\n }\n ret = (ret << 5) | decoded;\n }\n\n uint bitlen = len * 5;\n if(len % 8 == 0) {\n // Multiple of 8 characters, no padding\n ret = (ret << 5) | decoded;\n } 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"rightExpression": { "argumentTypes": null, "hexValue": "33", "id": 5602, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10456:1:22", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_3_by_1", "typeString": "int_const 3" }, "value": "3" }, "src": "10449:8:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 5604, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "10448:10:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "|", "rightExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 5607, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 5605, "name": "decoded", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5505, "src": "10462:7:22", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": ">>", "rightExpression": { "argumentTypes": null, "hexValue": "32", "id": 5606, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10473:1:22", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_2_by_1", "typeString": "int_const 2" }, "value": "2" }, "src": "10462:12:22", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } } ], "id": 5608, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "10461:14:22", "typeDescriptions": { "typeIdentifier": "t_uint8", 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"typeDescriptions": { "typeIdentifier": "t_rational_2_by_1", "typeString": "int_const 2" }, "value": "2" }, "src": "10489:11:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 5615, "nodeType": "ExpressionStatement", "src": "10489:11:22" } ] } }, "id": 5691, "nodeType": "IfStatement", "src": "10240:770:22", "trueBody": { "id": 5594, "nodeType": "Block", "src": "10257:103:22", "statements": [ { "expression": { "argumentTypes": null, "id": 5592, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 5585, "name": "ret", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5501, "src": "10323:3:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5591, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5588, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 5586, "name": "ret", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5501, "src": "10330:3:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<<", "rightExpression": { "argumentTypes": null, "hexValue": "35", "id": 5587, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10337:1:22", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_5_by_1", "typeString": "int_const 5" }, "value": "5" }, "src": "10330:8:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 5589, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "10329:10:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "|", "rightExpression": { "argumentTypes": null, "id": 5590, "name": "decoded", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5505, "src": "10342:7:22", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "src": "10329:20:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10323:26:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 5593, "nodeType": "ExpressionStatement", "src": "10323:26:22" } ] } }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5698, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 5693, "name": "ret", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5501, "src": "11035:3:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<<", "rightExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5696, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "hexValue": "323536", "id": 5694, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11043:3:22", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_256_by_1", "typeString": "int_const 256" }, "value": "256" }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "argumentTypes": null, "id": 5695, "name": "bitlen", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5575, "src": "11049:6:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11043:12:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 5697, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "11042:14:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11035:21:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 5692, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11027:7:22", "typeDescriptions": { "typeIdentifier": "t_type$_t_bytes32_$", "typeString": "type(bytes32)" }, "typeName": "bytes32" }, "id": 5699, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11027:30:22", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 5493, "id": 5700, "nodeType": "Return", "src": "11020:37:22" } ] }, "documentation": "@dev Decodes unpadded base32 data of up to one word in length.\n@param self The data to decode.\n@param off Offset into the string to start at.\n@param len Number of characters to decode.\n@return The decoded data, left aligned.", "id": 5702, "implemented": true, "kind": "function", "modifiers": [], "name": 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