Contract 0x0000000000000000000000000000000000001006

 
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GENESIS at txn GENESIS_0000000000000000000000000000000000001006
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0xadf75880d84c3f6aeef8ae3a0f34cf37e95f085f9c920215ab30a7f5775d02276774882020-09-21 16:04:04124 days 55 mins ago0x5d738abda39f3993d9781b61c1519e5c2e4b43ab IN  BSC: Relayer Hub0 BNB0.00058616
0xc4128b9d88d6ad9676b53c81210b74460d8411897c0ec57020e98873120c72a76569642020-09-20 22:57:52124 days 18 hrs ago0x5d738abda39f3993d9781b61c1519e5c2e4b43ab IN  BSC: Relayer Hub100 BNB0.0017657
0x8bede44fa968a10ca99550c297cf57195f1a20fd5e5682347f21a67a7e260f5d3982020-08-29 3:46:37147 days 13 hrs ago0xb005741528b86f5952469d80a8614591e3c5b632 IN  BSC: Relayer Hub100 BNB0.0017657
0x63ee6d44a3c25ab244d4d47a2de212544a017e79d1a829a294d69f71134a74743632020-08-29 3:44:52147 days 13 hrs ago0x446aa6e0dc65690403df3f127750da1322941f3e IN  BSC: Relayer Hub100 BNB0.0017657
0xc043c5d33f8c3a6d6c0853ff8cbe88ebdf746f8092cb763b18de65db45246a6e12020-08-29 3:24:09147 days 13 hrs agoValidator: Sigm8 IN  BSC: Relayer Hub0 BNB0
GENESIS_000000000000000000000000000000000000100602020-08-29 3:24:08147 days 13 hrs agoGENESIS IN  Contract Creation0 BNB0
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0x6455782b84690ed0f63f070d32b6f23f8e819d8f547423711ad693934d1e65ff42470782021-01-23 16:56:243 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0xf1506c6c90f29fba5c7a259b3dd3c019b758b0ab3554db13862a0b4b7573018142470782021-01-23 16:56:243 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0xba50dd3c0852c0078b6af28d30b366b72616b077bef597106b9607df85e8bb4742470702021-01-23 16:56:003 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0x618084c193c6116daa0d7caf3eede398c63595e476a10c0d22ef72b0b759574842470702021-01-23 16:56:003 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0xfc2a42326a94b8475328a8b7ac764b5c5190cfe4cf9fa6903590ad826190918c42469962021-01-23 16:52:187 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0xf15bad471862e642b331466df612abb8e4b204cde3bc30ac1e6d0c1e40812f3642469962021-01-23 16:52:187 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0xea51f46b01354c0f43b3a1f0a00a025d633a8fff3bc3010019c7d9296e48828c42469962021-01-23 16:52:187 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0x6a2f7271ab0cff3f7ef3efab3601d7c5526bed2ee0968b20b3baa30ec124cc9642469962021-01-23 16:52:187 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0x7780d0bc1635b80e2d9d9143ae0e33573f64155897adc3d823ef3ef08bfb57d242469962021-01-23 16:52:187 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0x4412955cee809989ff748a7a92427d79ede290874ca0583f0af0807cf62e487442469962021-01-23 16:52:187 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0x13f6ffb82713ce8866ae5bc86fc4e8ebb4357dd75eed3aab64a08ded4971a1cd42469712021-01-23 16:51:038 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0xf41f1e3b16f326c9abb9d4484a35a5ba1ce9c20ea6d985b8ac2dda4aeab0bb5942469712021-01-23 16:51:038 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0x5937adb03904e22eba88141051cb372e0e6dbd12f3efea755984001097cf2d1c42469712021-01-23 16:51:038 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0x2a9bcaaae968a799e8868b6192153081f1a5020aa8263f43f42853766c60d68242469712021-01-23 16:51:038 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0x2f43185d854410231becb84152de9a36b935f730d356aa099eccc45ae73b1f2b42469512021-01-23 16:50:039 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0x6d7d1909bfed821b9fc6295c66b53de57221468a9f333668e765af271b8edee142469502021-01-23 16:50:009 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0x9d1e376f7e363ab83e663058cd9473df54fda26b3436684c55afee060f39f08042469502021-01-23 16:50:009 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0xf62723155a93bed2aab80e364b38184b77375d6e4d53c2980e7f24c7c597c7cf42469502021-01-23 16:50:009 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0x8110d9153411c9f81956cacaf7fc13b95cba998703ad82d5a9528783aaf4ffd142469292021-01-23 16:48:5710 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0x7c530e0b702787e392ab78b889683fadaabda5f79046c301c0487d443aef018742469292021-01-23 16:48:5710 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0xda3f7e602d87cb2d91e0303eecf8435c16cb39f4ece5fb9905647cf284c11ef142469292021-01-23 16:48:5710 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0x15314bd79a43a83dfff5422e6ad8fc9087876783cc0ab6d2b0e6371ee90e545b42469282021-01-23 16:48:5410 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0x108fe8a65d12d4c1103af68f01a23be9606995584a17717dace7312bca25af5b42469262021-01-23 16:48:4810 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
0x13cee20395e1ff29cdcf4737f47de45957ef98c20f6ed967fcab812608a552bf42469262021-01-23 16:48:4810 mins ago BSC: Tendermint Light Client BSC: Relayer Hub0 BNB
0x212013e1e57f0dd61f4e924002d6ae8cab81dacf291c559e3b5e443a9d30d1c742469252021-01-23 16:48:4510 mins ago BSC: Cross Chain BSC: Relayer Hub0 BNB
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Contract Source Code Verified (Exact Match)

Contract Name:
RelayerHub

Compiler Version
v0.6.4+commit.1dca32f3

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity)

/**
 *Submitted for verification at BscScan.com on 2020-09-02
*/

// File: contracts/lib/BytesToTypes.sol

pragma solidity 0.6.4;

/**
 * @title BytesToTypes
 * Copyright (c) 2016-2020 zpouladzade/Seriality
 * @dev The BytesToTypes contract converts the memory byte arrays to the standard solidity types
 * @author [email protected]
 */

library BytesToTypes {


    function bytesToAddress(uint _offst, bytes memory _input) internal pure returns (address _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToBool(uint _offst, bytes memory _input) internal pure returns (bool _output) {

        uint8 x;
        assembly {
            x := mload(add(_input, _offst))
        }
        x==0 ? _output = false : _output = true;
    }

    function getStringSize(uint _offst, bytes memory _input) internal pure returns(uint size) {

        assembly{

            size := mload(add(_input,_offst))
            let chunk_count := add(div(size,32),1) // chunk_count = size/32 + 1

            if gt(mod(size,32),0) {// if size%32 > 0
                chunk_count := add(chunk_count,1)
            }

             size := mul(chunk_count,32)// first 32 bytes reseves for size in strings
        }
    }

    function bytesToString(uint _offst, bytes memory _input, bytes memory _output) internal pure {

        uint size = 32;
        assembly {

            let chunk_count

            size := mload(add(_input,_offst))
            chunk_count := add(div(size,32),1) // chunk_count = size/32 + 1

            if gt(mod(size,32),0) {
                chunk_count := add(chunk_count,1)  // chunk_count++
            }

            for { let index:= 0 }  lt(index , chunk_count) { index := add(index,1) } {
                mstore(add(_output,mul(index,32)),mload(add(_input,_offst)))
                _offst := sub(_offst,32)           // _offst -= 32
            }
        }
    }

    function bytesToBytes32(uint _offst, bytes memory  _input, bytes32 _output) internal pure {

        assembly {
            mstore(_output , add(_input, _offst))
            mstore(add(_output,32) , add(add(_input, _offst),32))
        }
    }

    function bytesToInt8(uint _offst, bytes memory  _input) internal pure returns (int8 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt16(uint _offst, bytes memory _input) internal pure returns (int16 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt24(uint _offst, bytes memory _input) internal pure returns (int24 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt32(uint _offst, bytes memory _input) internal pure returns (int32 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt40(uint _offst, bytes memory _input) internal pure returns (int40 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt48(uint _offst, bytes memory _input) internal pure returns (int48 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt56(uint _offst, bytes memory _input) internal pure returns (int56 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt64(uint _offst, bytes memory _input) internal pure returns (int64 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt72(uint _offst, bytes memory _input) internal pure returns (int72 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt80(uint _offst, bytes memory _input) internal pure returns (int80 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt88(uint _offst, bytes memory _input) internal pure returns (int88 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt96(uint _offst, bytes memory _input) internal pure returns (int96 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToInt104(uint _offst, bytes memory _input) internal pure returns (int104 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt112(uint _offst, bytes memory _input) internal pure returns (int112 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt120(uint _offst, bytes memory _input) internal pure returns (int120 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt128(uint _offst, bytes memory _input) internal pure returns (int128 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt136(uint _offst, bytes memory _input) internal pure returns (int136 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt144(uint _offst, bytes memory _input) internal pure returns (int144 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt152(uint _offst, bytes memory _input) internal pure returns (int152 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt160(uint _offst, bytes memory _input) internal pure returns (int160 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt168(uint _offst, bytes memory _input) internal pure returns (int168 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt176(uint _offst, bytes memory _input) internal pure returns (int176 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt184(uint _offst, bytes memory _input) internal pure returns (int184 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt192(uint _offst, bytes memory _input) internal pure returns (int192 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt200(uint _offst, bytes memory _input) internal pure returns (int200 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt208(uint _offst, bytes memory _input) internal pure returns (int208 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt216(uint _offst, bytes memory _input) internal pure returns (int216 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt224(uint _offst, bytes memory _input) internal pure returns (int224 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt232(uint _offst, bytes memory _input) internal pure returns (int232 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt240(uint _offst, bytes memory _input) internal pure returns (int240 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt248(uint _offst, bytes memory _input) internal pure returns (int248 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToInt256(uint _offst, bytes memory _input) internal pure returns (int256 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint8(uint _offst, bytes memory _input) internal pure returns (uint8 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint16(uint _offst, bytes memory _input) internal pure returns (uint16 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint24(uint _offst, bytes memory _input) internal pure returns (uint24 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint32(uint _offst, bytes memory _input) internal pure returns (uint32 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint40(uint _offst, bytes memory _input) internal pure returns (uint40 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint48(uint _offst, bytes memory _input) internal pure returns (uint48 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint56(uint _offst, bytes memory _input) internal pure returns (uint56 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint64(uint _offst, bytes memory _input) internal pure returns (uint64 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint72(uint _offst, bytes memory _input) internal pure returns (uint72 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint80(uint _offst, bytes memory _input) internal pure returns (uint80 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint88(uint _offst, bytes memory _input) internal pure returns (uint88 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint96(uint _offst, bytes memory _input) internal pure returns (uint96 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

        function bytesToUint104(uint _offst, bytes memory _input) internal pure returns (uint104 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint112(uint _offst, bytes memory _input) internal pure returns (uint112 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint120(uint _offst, bytes memory _input) internal pure returns (uint120 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint128(uint _offst, bytes memory _input) internal pure returns (uint128 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint136(uint _offst, bytes memory _input) internal pure returns (uint136 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint144(uint _offst, bytes memory _input) internal pure returns (uint144 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint152(uint _offst, bytes memory _input) internal pure returns (uint152 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint160(uint _offst, bytes memory _input) internal pure returns (uint160 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint168(uint _offst, bytes memory _input) internal pure returns (uint168 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint176(uint _offst, bytes memory _input) internal pure returns (uint176 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint184(uint _offst, bytes memory _input) internal pure returns (uint184 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint192(uint _offst, bytes memory _input) internal pure returns (uint192 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint200(uint _offst, bytes memory _input) internal pure returns (uint200 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint208(uint _offst, bytes memory _input) internal pure returns (uint208 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint216(uint _offst, bytes memory _input) internal pure returns (uint216 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint224(uint _offst, bytes memory _input) internal pure returns (uint224 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint232(uint _offst, bytes memory _input) internal pure returns (uint232 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint240(uint _offst, bytes memory _input) internal pure returns (uint240 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint248(uint _offst, bytes memory _input) internal pure returns (uint248 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

    function bytesToUint256(uint _offst, bytes memory _input) internal pure returns (uint256 _output) {

        assembly {
            _output := mload(add(_input, _offst))
        }
    }

}

// File: contracts/lib/Memory.sol

pragma solidity 0.6.4;

library Memory {

    // Size of a word, in bytes.
    uint internal constant WORD_SIZE = 32;
    // Size of the header of a 'bytes' array.
    uint internal constant BYTES_HEADER_SIZE = 32;
    // Address of the free memory pointer.
    uint internal constant FREE_MEM_PTR = 0x40;

    // Compares the 'len' bytes starting at address 'addr' in memory with the 'len'
    // bytes starting at 'addr2'.
    // Returns 'true' if the bytes are the same, otherwise 'false'.
    function equals(uint addr, uint addr2, uint len) internal pure returns (bool equal) {
        assembly {
            equal := eq(keccak256(addr, len), keccak256(addr2, len))
        }
    }

    // Compares the 'len' bytes starting at address 'addr' in memory with the bytes stored in
    // 'bts'. It is allowed to set 'len' to a lower value then 'bts.length', in which case only
    // the first 'len' bytes will be compared.
    // Requires that 'bts.length >= len'
    function equals(uint addr, uint len, bytes memory bts) internal pure returns (bool equal) {
        require(bts.length >= len);
        uint addr2;
        assembly {
            addr2 := add(bts, /*BYTES_HEADER_SIZE*/32)
        }
        return equals(addr, addr2, len);
    }

    function compareStrings(string memory a, string memory b) internal pure returns (bool) {
        return (keccak256(abi.encodePacked((a))) == keccak256(abi.encodePacked((b))));
    }

    // Copy 'len' bytes from memory address 'src', to address 'dest'.
    // This function does not check the or destination, it only copies
    // the bytes.
    function copy(uint src, uint dest, uint len) internal pure {
        // Copy word-length chunks while possible
        for (; len >= WORD_SIZE; len -= WORD_SIZE) {
            assembly {
                mstore(dest, mload(src))
            }
            dest += WORD_SIZE;
            src += WORD_SIZE;
        }

        // Copy remaining bytes
        uint mask = 256 ** (WORD_SIZE - len) - 1;
        assembly {
            let srcpart := and(mload(src), not(mask))
            let destpart := and(mload(dest), mask)
            mstore(dest, or(destpart, srcpart))
        }
    }

    // Returns a memory pointer to the provided bytes array.
    function ptr(bytes memory bts) internal pure returns (uint addr) {
        assembly {
            addr := bts
        }
    }

    // Returns a memory pointer to the data portion of the provided bytes array.
    function dataPtr(bytes memory bts) internal pure returns (uint addr) {
        assembly {
            addr := add(bts, /*BYTES_HEADER_SIZE*/32)
        }
    }

    // This function does the same as 'dataPtr(bytes memory)', but will also return the
    // length of the provided bytes array.
    function fromBytes(bytes memory bts) internal pure returns (uint addr, uint len) {
        len = bts.length;
        assembly {
            addr := add(bts, /*BYTES_HEADER_SIZE*/32)
        }
    }

    // Creates a 'bytes memory' variable from the memory address 'addr', with the
    // length 'len'. The function will allocate new memory for the bytes array, and
    // the 'len bytes starting at 'addr' will be copied into that new memory.
    function toBytes(uint addr, uint len) internal pure returns (bytes memory bts) {
        bts = new bytes(len);
        uint btsptr;
        assembly {
            btsptr := add(bts, /*BYTES_HEADER_SIZE*/32)
        }
        copy(addr, btsptr, len);
    }

    // Get the word stored at memory address 'addr' as a 'uint'.
    function toUint(uint addr) internal pure returns (uint n) {
        assembly {
            n := mload(addr)
        }
    }

    // Get the word stored at memory address 'addr' as a 'bytes32'.
    function toBytes32(uint addr) internal pure returns (bytes32 bts) {
        assembly {
            bts := mload(addr)
        }
    }
}

// File: contracts/interface/IRelayerHub.sol

pragma solidity 0.6.4;

interface IRelayerHub {
  function isRelayer(address sender) external view returns (bool);
}

// File: contracts/interface/IParamSubscriber.sol

pragma solidity 0.6.4;

interface IParamSubscriber {
    function updateParam(string calldata key, bytes calldata value) external;
}

// File: contracts/interface/ISystemReward.sol

pragma solidity 0.6.4;

interface ISystemReward {
  function claimRewards(address payable to, uint256 amount) external returns(uint256 actualAmount);
}

// File: contracts/interface/ILightClient.sol

pragma solidity 0.6.4;

interface ILightClient {

  function isHeaderSynced(uint64 height) external view returns (bool);

  function getAppHash(uint64 height) external view returns (bytes32);

  function getSubmitter(uint64 height) external view returns (address payable);

}

// File: contracts/System.sol

pragma solidity 0.6.4;




contract System {

  bool public alreadyInit;

  uint32 public constant CODE_OK = 0;
  uint32 public constant ERROR_FAIL_DECODE = 100;

  uint8 constant public BIND_CHANNELID = 0x01;
  uint8 constant public TRANSFER_IN_CHANNELID = 0x02;
  uint8 constant public TRANSFER_OUT_CHANNELID = 0x03;
  uint8 constant public STAKING_CHANNELID = 0x08;
  uint8 constant public GOV_CHANNELID = 0x09;
  uint8 constant public SLASH_CHANNELID = 0x0b;
  uint16 constant public bscChainID = 0x0038;

  address public constant VALIDATOR_CONTRACT_ADDR = 0x0000000000000000000000000000000000001000;
  address public constant SLASH_CONTRACT_ADDR = 0x0000000000000000000000000000000000001001;
  address public constant SYSTEM_REWARD_ADDR = 0x0000000000000000000000000000000000001002;
  address public constant LIGHT_CLIENT_ADDR = 0x0000000000000000000000000000000000001003;
  address public constant TOKEN_HUB_ADDR = 0x0000000000000000000000000000000000001004;
  address public constant INCENTIVIZE_ADDR=0x0000000000000000000000000000000000001005;
  address public constant RELAYERHUB_CONTRACT_ADDR = 0x0000000000000000000000000000000000001006;
  address public constant GOV_HUB_ADDR = 0x0000000000000000000000000000000000001007;
  address public constant TOKEN_MANAGER_ADDR = 0x0000000000000000000000000000000000001008;
  address public constant CROSS_CHAIN_CONTRACT_ADDR = 0x0000000000000000000000000000000000002000;


  modifier onlyCoinbase() {
    require(msg.sender == block.coinbase, "the message sender must be the block producer");
    _;
  }

  modifier onlyNotInit() {
    require(!alreadyInit, "the contract already init");
    _;
  }

  modifier onlyInit() {
    require(alreadyInit, "the contract not init yet");
    _;
  }

  modifier onlySlash() {
    require(msg.sender == SLASH_CONTRACT_ADDR, "the message sender must be slash contract");
    _;
  }

  modifier onlyTokenHub() {
    require(msg.sender == TOKEN_HUB_ADDR, "the message sender must be token hub contract");
    _;
  }

  modifier onlyGov() {
    require(msg.sender == GOV_HUB_ADDR, "the message sender must be governance contract");
    _;
  }

  modifier onlyValidatorContract() {
    require(msg.sender == VALIDATOR_CONTRACT_ADDR, "the message sender must be validatorSet contract");
    _;
  }

  modifier onlyCrossChainContract() {
    require(msg.sender == CROSS_CHAIN_CONTRACT_ADDR, "the message sender must be cross chain contract");
    _;
  }

  modifier onlyRelayerIncentivize() {
    require(msg.sender == INCENTIVIZE_ADDR, "the message sender must be incentivize contract");
    _;
  }

  modifier onlyRelayer() {
    require(IRelayerHub(RELAYERHUB_CONTRACT_ADDR).isRelayer(msg.sender), "the msg sender is not a relayer");
    _;
  }

  modifier onlyTokenManager() {
    require(msg.sender == TOKEN_MANAGER_ADDR, "the msg sender must be tokenManager");
    _;
  }

  // Not reliable, do not use when need strong verify
  function isContract(address addr) internal view returns (bool) {
    uint size;
    assembly { size := extcodesize(addr) }
    return size > 0;
  }
}

// File: contracts/lib/SafeMath.sol

pragma solidity 0.6.4;

/**
 * Copyright (c) 2016-2019 zOS Global Limited
 * @dev 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.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: contracts/RelayerHub.sol

pragma solidity 0.6.4;








contract RelayerHub is IRelayerHub, System, IParamSubscriber{
  using SafeMath for uint256;

  uint256 public constant INIT_REQUIRED_DEPOSIT =  1e20;
  uint256 public constant INIT_DUES =  1e17;

  uint256 public requiredDeposit;
  uint256 public dues;

  mapping(address =>relayer) relayers;
  mapping(address =>bool) relayersExistMap;

  struct relayer{
    uint256 deposit;
    uint256  dues;
  }

  modifier notContract() {
    require(!isContract(msg.sender), "contract is not allowed to be a relayer");
    _;
  }

  modifier noProxy() {
    require(msg.sender == tx.origin, "no proxy is allowed");
    _;
  }

  modifier noExist() {
    require(!relayersExistMap[msg.sender], "relayer already exist");
    _;
  }

  modifier exist() {
    require(relayersExistMap[msg.sender], "relayer do not exist");
    _;
  }

  event relayerRegister(address _relayer);
  event relayerUnRegister(address _relayer);
  event paramChange(string key, bytes value);


  function init() external onlyNotInit{
    requiredDeposit = INIT_REQUIRED_DEPOSIT;
    dues = INIT_DUES;
    alreadyInit = true;
  }

  function register() external payable noExist onlyInit notContract noProxy{
    require(msg.value == requiredDeposit, "deposit value is not exactly the same");
    relayers[msg.sender] = relayer(requiredDeposit, dues);
    relayersExistMap[msg.sender] = true;
    emit relayerRegister(msg.sender);
  }

  function  unregister() external exist onlyInit{
    relayer memory r = relayers[msg.sender];
    msg.sender.transfer(r.deposit.sub(r.dues));
    address payable systemPayable = address(uint160(SYSTEM_REWARD_ADDR));
    systemPayable.transfer(r.dues);
    delete relayersExistMap[msg.sender];
    delete relayers[msg.sender];
    emit relayerUnRegister(msg.sender);
  }

  /*********************** Param update ********************************/
  function updateParam(string calldata key, bytes calldata value) external override onlyInit onlyGov{
    if (Memory.compareStrings(key,"requiredDeposit")) {
      require(value.length == 32, "length of requiredDeposit mismatch");
      uint256 newRequiredDeposit = BytesToTypes.bytesToUint256(32, value);
      require(newRequiredDeposit > 1 && newRequiredDeposit <= 1e21 && newRequiredDeposit > dues, "the requiredDeposit out of range");
      requiredDeposit = newRequiredDeposit;
    } else if (Memory.compareStrings(key,"dues")) {
      require(value.length == 32, "length of dues mismatch");
      uint256 newDues = BytesToTypes.bytesToUint256(32, value);
      require(newDues > 0 && newDues < requiredDeposit, "the dues out of range");
      dues = newDues;
    } else {
      require(false, "unknown param");
    }
    emit paramChange(key, value);
  }

  function isRelayer(address sender) external override view returns (bool) {
    return relayersExistMap[sender];
  }
}

Contract ABI

[{"type":"event","name":"paramChange","inputs":[{"type":"string","name":"key","internalType":"string","indexed":false},{"type":"bytes","name":"value","internalType":"bytes","indexed":false}],"anonymous":false},{"type":"event","name":"relayerRegister","inputs":[{"type":"address","name":"_relayer","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"relayerUnRegister","inputs":[{"type":"address","name":"_relayer","internalType":"address","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"BIND_CHANNELID","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint32","name":"","internalType":"uint32"}],"name":"CODE_OK","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"CROSS_CHAIN_CONTRACT_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint32","name":"","internalType":"uint32"}],"name":"ERROR_FAIL_DECODE","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"GOV_CHANNELID","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"GOV_HUB_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"INCENTIVIZE_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"INIT_DUES","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"INIT_REQUIRED_DEPOSIT","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"LIGHT_CLIENT_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"RELAYERHUB_CONTRACT_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"SLASH_CHANNELID","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"SLASH_CONTRACT_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"STAKING_CHANNELID","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"SYSTEM_REWARD_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"TOKEN_HUB_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"TOKEN_MANAGER_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"TRANSFER_IN_CHANNELID","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"TRANSFER_OUT_CHANNELID","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"VALIDATOR_CONTRACT_ADDR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"alreadyInit","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint16","name":"","internalType":"uint16"}],"name":"bscChainID","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"dues","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"init","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isRelayer","inputs":[{"type":"address","name":"sender","internalType":"address"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"register","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"requiredDeposit","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"unregister","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"updateParam","inputs":[{"type":"string","name":"key","internalType":"string"},{"type":"bytes","name":"value","internalType":"bytes"}]}]

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