{
  "address": "0x9AD4D97363652970BbA7923a4DbBF401BFa76D8e",
  "transactionHash": "0xb9c79b60d28c73a2e285d3ff9cecc9388836d63e31ecb9341342061159e73417",
  "abi": [
    {
      "inputs": [
        {
          "internalType": "bytes",
          "name": "key",
          "type": "bytes"
        },
        {
          "internalType": "bytes",
          "name": "data",
          "type": "bytes"
        },
        {
          "internalType": "bytes",
          "name": "sig",
          "type": "bytes"
        }
      ],
      "name": "verify",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    }
  ],
  "transactionHash": "0xb9c79b60d28c73a2e285d3ff9cecc9388836d63e31ecb9341342061159e73417",
  "receipt": {
    "to": null,
    "from": "0xa303ddC620aa7d1390BACcc8A495508B183fab59",
    "contractAddress": "0x9AD4D97363652970BbA7923a4DbBF401BFa76D8e",
    "transactionIndex": 20,
    "gasUsed": "478262",
    "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "blockHash": "0x1dfc3b1c599fdc05960d3237a10c2d5bf7111d75398202be5bf3d9c257eb8725",
    "transactionHash": "0xb9c79b60d28c73a2e285d3ff9cecc9388836d63e31ecb9341342061159e73417",
    "logs": [],
    "blockNumber": 6469095,
    "cumulativeGasUsed": "5570856",
    "status": 1,
    "byzantium": true
  },
  "args": [],
  "solcInputHash": "7948b60c3b601df824761a337a51d661",
  "metadata": "{\"compiler\":{\"version\":\"0.8.4+commit.c7e474f2\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"bytes\",\"name\":\"key\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"sig\",\"type\":\"bytes\"}],\"name\":\"verify\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Implements the DNSSEC RSASHA256 algorithm.\",\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"contracts/dnssec-oracle/algorithms/RSASHA256Algorithm.sol\":\"RSASHA256Algorithm\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\",\"useLiteralContent\":true},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"contracts/dnssec-oracle/BytesUtils.sol\":{\"content\":\"pragma solidity ^0.8.4;\\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 = type(uint256).max;\\n                } else {\\n                    mask = ~(2 ** (8 * (32 - shortest + idx)) - 1);\\n                }\\n                int diff = int(a & mask) - int(b & mask);\\n                if (diff != 0)\\n                return 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        unchecked {\\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    /*\\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        } else if(len % 8 == 2) {\\n            // Two extra characters - 1 byte\\n            ret = (ret << 3) | (decoded >> 2);\\n            bitlen -= 2;\\n        } else if(len % 8 == 4) {\\n            // Four extra characters - 2 bytes\\n            ret = (ret << 1) | (decoded >> 4);\\n            bitlen -= 4;\\n        } else if(len % 8 == 5) {\\n            // Five extra characters - 3 bytes\\n            ret = (ret << 4) | (decoded >> 1);\\n            bitlen -= 1;\\n        } else if(len % 8 == 7) {\\n            // Seven extra characters - 4 bytes\\n            ret = (ret << 2) | (decoded >> 3);\\n            bitlen -= 3;\\n        } else {\\n            revert();\\n        }\\n\\n        return bytes32(ret << (256 - bitlen));\\n    }\\n}\",\"keccak256\":\"0x83315df2e54c74451577c70da2c267c3459802b08b9aeec6516302eee70f796e\"},\"contracts/dnssec-oracle/algorithms/Algorithm.sol\":{\"content\":\"pragma solidity ^0.8.4;\\n\\n/**\\n* @dev An interface for contracts implementing a DNSSEC (signing) algorithm.\\n*/\\ninterface Algorithm {\\n    /**\\n    * @dev Verifies a signature.\\n    * @param key The public key to verify with.\\n    * @param data The signed data to verify.\\n    * @param signature The signature to verify.\\n    * @return True iff the signature is valid.\\n    */\\n    function verify(bytes calldata key, bytes calldata data, bytes calldata signature) external virtual view returns (bool);\\n}\\n\",\"keccak256\":\"0x51d6251568844e435f58952354abe8c8c8e978ab40ecb0bbb2f5bd767838b3a7\"},\"contracts/dnssec-oracle/algorithms/ModexpPrecompile.sol\":{\"content\":\"pragma solidity ^0.8.4;\\n\\nlibrary ModexpPrecompile {\\n    /**\\n    * @dev Computes (base ^ exponent) % modulus over big numbers.\\n    */\\n    function modexp(bytes memory base, bytes memory exponent, bytes memory modulus) internal view returns (bool success, bytes memory output) {\\n        bytes memory input = abi.encodePacked(\\n            uint256(base.length),\\n            uint256(exponent.length),\\n            uint256(modulus.length),\\n            base,\\n            exponent,\\n            modulus\\n        );\\n\\n        output = new bytes(modulus.length);\\n\\n        assembly {\\n            success := staticcall(gas(), 5, add(input, 32), mload(input), add(output, 32), mload(modulus))\\n        }\\n    }\\n}\\n\",\"keccak256\":\"0xe3d689d14cf0294f433f4e14cdd8feab8d542e5b8342c911d5c7cb518170e2b1\"},\"contracts/dnssec-oracle/algorithms/RSASHA256Algorithm.sol\":{\"content\":\"pragma solidity ^0.8.4;\\n\\nimport \\\"./Algorithm.sol\\\";\\nimport \\\"../BytesUtils.sol\\\";\\nimport \\\"./RSAVerify.sol\\\";\\n\\n/**\\n* @dev Implements the DNSSEC RSASHA256 algorithm.\\n*/\\ncontract RSASHA256Algorithm is Algorithm {\\n    using BytesUtils for *;\\n\\n    function verify(bytes calldata key, bytes calldata data, bytes calldata sig) external override view returns (bool) {\\n        bytes memory exponent;\\n        bytes memory modulus;\\n\\n        uint16 exponentLen = uint16(key.readUint8(4));\\n        if (exponentLen != 0) {\\n            exponent = key.substring(5, exponentLen);\\n            modulus = key.substring(exponentLen + 5, key.length - exponentLen - 5);\\n        } else {\\n            exponentLen = key.readUint16(5);\\n            exponent = key.substring(7, exponentLen);\\n            modulus = key.substring(exponentLen + 7, key.length - exponentLen - 7);\\n        }\\n\\n        // Recover the message from the signature\\n        bool ok;\\n        bytes memory result;\\n        (ok, result) = RSAVerify.rsarecover(modulus, exponent, sig);\\n\\n        // Verify it ends with the hash of our data\\n        return ok && sha256(data) == result.readBytes32(result.length - 32);\\n    }\\n}\\n\",\"keccak256\":\"0x8a5f89ac82a433590cd29d0a9e72ca68618b86105dfcd62e04dff313ddcf809d\"},\"contracts/dnssec-oracle/algorithms/RSAVerify.sol\":{\"content\":\"pragma solidity ^0.8.4;\\n\\nimport \\\"../BytesUtils.sol\\\";\\nimport \\\"./ModexpPrecompile.sol\\\";\\n\\nlibrary RSAVerify {\\n    /**\\n    * @dev Recovers the input data from an RSA signature, returning the result in S.\\n    * @param N The RSA public modulus.\\n    * @param E The RSA public exponent.\\n    * @param S The signature to recover.\\n    * @return True if the recovery succeeded.\\n    */\\n    function rsarecover(bytes memory N, bytes memory E, bytes memory S) internal view returns (bool, bytes memory) {\\n        return ModexpPrecompile.modexp(S, E, N);\\n    }\\n}\\n\",\"keccak256\":\"0xc630e4d296e2d7bd2b968f8a9a8df629fef5161e10ffae9973e045900741cfe4\"}},\"version\":1}",
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  "devdoc": {
    "details": "Implements the DNSSEC RSASHA256 algorithm.",
    "kind": "dev",
    "methods": {},
    "version": 1
  },
  "userdoc": {
    "kind": "user",
    "methods": {},
    "version": 1
  },
  "storageLayout": {
    "storage": [],
    "types": null
  }
}