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Outline

•  contract LnAdmin
•    - function setCandidate(address _candid ...
•    - function becomeAdmin()
•  contract LnConfig is LnAdmin *
•    - function getUint(bytes32 key)
•    - function setUint(bytes32 key, uint va ...
•    - function deleteUint(bytes32 key)
•    - function batchSet(bytes32[] calldata ...

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/**
 *Submitted for verification at Etherscan.io on 2020-12-21
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;

contract LnAdmin {
    address public admin;
    address public candidate;

    constructor(address _admin) public {
        require(_admin != address(0), "admin address cannot be 0");
        admin = _admin;
        emit AdminChanged(address(0), _admin);
    }

    function setCandidate(address _candidate) external onlyAdmin {
        address old = candidate;
        candidate = _candidate;
        emit CandidateChanged(old, candidate);
    }

    function becomeAdmin() external {
        require(msg.sender == candidate, "Only candidate can become admin");
        address old = admin;
        admin = candidate;
        emit AdminChanged(old, admin);
    }

    modifier onlyAdmin {
        require((msg.sender == admin), "Only the contract admin can perform this action");
        _;
    }

    event CandidateChanged(address oldCandidate, address newCandidate);
    event AdminChanged(address oldAdmin, address newAdmin);
}

contract LnConfig is LnAdmin {
    mapping(bytes32 => uint) internal mUintConfig;

    constructor(address _admin) public LnAdmin(_admin) {}

    //some configue keys
    bytes32 public constant BUILD_RATIO = "BuildRatio"; // percent, base 10e18

    function getUint(bytes32 key) external view returns (uint) {
        return mUintConfig[key];
    }

    function setUint(bytes32 key, uint value) external onlyAdmin {
        mUintConfig[key] = value;
        emit SetUintConfig(key, value);
    }

    function deleteUint(bytes32 key) external onlyAdmin {
        delete mUintConfig[key];
        emit SetUintConfig(key, 0);
    }

    function batchSet(bytes32[] calldata names, uint[] calldata values) external onlyAdmin {
        require(names.length == values.length, "Input lengths must match");

        for (uint i = 0; i < names.length; i++) {
            mUintConfig[names[i]] = values[i];
            emit SetUintConfig(names[i], values[i]);
        }
    }

    event SetUintConfig(bytes32 key, uint value);
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_admin","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldCandidate","type":"address"},{"indexed":false,"internalType":"address","name":"newCandidate","type":"address"}],"name":"CandidateChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"key","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"SetUintConfig","type":"event"},{"inputs":[],"name":"BUILD_RATIO","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"names","type":"bytes32[]"},{"internalType":"uint256[]","name":"values","type":"uint256[]"}],"name":"batchSet","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"becomeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"candidate","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"key","type":"bytes32"}],"name":"deleteUint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"key","type":"bytes32"}],"name":"getUint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_candidate","type":"address"}],"name":"setCandidate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"key","type":"bytes32"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"setUint","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000009ffde95ad5f740fb7843a420b2432f77641e28e8

-----Decoded View---------------
Arg [0] : _admin (address): 0x9FfDe95AD5f740fb7843A420B2432F77641e28E8

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000009ffde95ad5f740fb7843a420b2432f77641e28e8

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ipfs://95956ffad9c067082ab8041d65e077f7f2ac15011de783ae3dbb1ce8982b35b2