FeSwap TimeLock Contract

---

FeSwap TimeLock contract is the contract used to finally execute the proposals that win the voting successfully. Only the FeswGovernor contract can call TimeLock to queue/excute the proposal.

Timelock Address

ETH NetWork	FESW Token Address
ETH Mainnet	0xd24347C40f4ed36f326f82E3bEFFfaf3B8D436a1
ETH Testnet Ropsten	0xFA2Dbaa137b3Bd13d8f1758311Ae909397EC18AB
ETH Testnet Rinkeby	0xFA2Dbaa137b3Bd13d8f1758311Ae909397EC18AB
ETH Testnet Goerli	0xFA2Dbaa137b3Bd13d8f1758311Ae909397EC18AB
ETH Testnet Kovan	0xFA2Dbaa137b3Bd13d8f1758311Ae909397EC18AB

Timelock Deployments Parameters

• constructor(address admin_, uint delay_)

Parameters	Value	information
admin_	0x77F98c147a37564c32E48054Bff7692A1F97f343	This is the address of FeSwap Governance contract, which is the only entity that can operate Timelock contract.
delay_	0x2a300	This is the minimum duration the proposal must wait after it has been queued to be executed. This measure is for security considerraions. 0x2a300 means 172800 seconds, ie. 2 days

** Parameters on ETH Chain

Timelock Contract Code

FeSwap Timelock code is open-sourced at Github FeSwapCore Project

Following is the code deployed:

Timelock.sol

// SPDX-License-Identifier: GPL-3.0pragma solidity ^0.7.0;
import "./utils/SafeMath.sol";
contract Timelock {    using SafeMath for uint;
    event NewAdmin(address indexed newAdmin);    event NewPendingAdmin(address indexed newPendingAdmin);    event NewDelay(uint indexed newDelay);    event CancelTransaction(bytes32 indexed txHash, address indexed target, uint value, string signature,  bytes data, uint eta);    event ExecuteTransaction(bytes32 indexed txHash, address indexed target, uint value, string signature,  bytes data, uint eta);    event QueueTransaction(bytes32 indexed txHash, address indexed target, uint value, string signature, bytes data, uint eta);
    uint public constant GRACE_PERIOD = 14 days;    uint public constant MINIMUM_DELAY = 2 days;//  uint public constant MINIMUM_DELAY = 10 minutes;        // for on-chain test    uint public constant MAXIMUM_DELAY = 30 days;
    address public admin;    address public pendingAdmin;    uint public delay;
    mapping (bytes32 => bool) public queuedTransactions;
    constructor(address admin_, uint delay_) {        require(delay_ >= MINIMUM_DELAY, "Timelock::constructor: Delay must exceed minimum delay.");        require(delay_ <= MAXIMUM_DELAY, "Timelock::setDelay: Delay must not exceed maximum delay.");
        admin = admin_;        delay = delay_;    }
    receive() external payable { }  
    function setDelay(uint delay_) public {        require(msg.sender == address(this), "Timelock::setDelay: Call must come from Timelock.");        require(delay_ >= MINIMUM_DELAY, "Timelock::setDelay: Delay must exceed minimum delay.");        require(delay_ <= MAXIMUM_DELAY, "Timelock::setDelay: Delay must not exceed maximum delay.");        delay = delay_;
        emit NewDelay(delay);    }
    function acceptAdmin() public {        require(msg.sender == pendingAdmin, "Timelock::acceptAdmin: Call must come from pendingAdmin.");        admin = msg.sender;        pendingAdmin = address(0);
        emit NewAdmin(admin);    }
    function setPendingAdmin(address pendingAdmin_) public {        require(msg.sender == address(this), "Timelock::setPendingAdmin: Call must come from Timelock.");        pendingAdmin = pendingAdmin_;
        emit NewPendingAdmin(pendingAdmin);    }
    function queueTransaction(address target, uint value, string memory signature, bytes memory data, uint eta) public returns (bytes32) {        require(msg.sender == admin, "Timelock::queueTransaction: Call must come from admin.");               require(eta >= getBlockTimestamp().add(delay), "Timelock::queueTransaction: Estimated execution block must satisfy delay.");
        bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta));        queuedTransactions[txHash] = true;
        emit QueueTransaction(txHash, target, value, signature, data, eta);        return txHash;    }
    function cancelTransaction(address target, uint value, string memory signature, bytes memory data, uint eta) public {        require(msg.sender == admin, "Timelock::cancelTransaction: Call must come from admin.");
        bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta));        queuedTransactions[txHash] = false;
        emit CancelTransaction(txHash, target, value, signature, data, eta);    }
    function executeTransaction(address target, uint value, string memory signature, bytes memory data, uint eta) public payable returns (bytes memory) {        require(msg.sender == admin, "Timelock::executeTransaction: Call must come from admin.");
        bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta));        require(queuedTransactions[txHash], "Timelock::executeTransaction: Transaction hasn't been queued.");        require(getBlockTimestamp() >= eta, "Timelock::executeTransaction: Transaction hasn't surpassed time lock.");        require(getBlockTimestamp() <= eta.add(GRACE_PERIOD), "Timelock::executeTransaction: Transaction is stale.");
        queuedTransactions[txHash] = false;
        bytes memory callData;
        if (bytes(signature).length == 0) {            callData = data;        } else {            callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data);        }
        // solium-disable-next-line security/no-call-value        (bool success, bytes memory returnData) = target.call{value:value}(callData);        require(success, "Timelock::executeTransaction: Transaction execution reverted.");
        emit ExecuteTransaction(txHash, target, value, signature, data, eta);
        return returnData;    }
    function getBlockTimestamp() internal view returns (uint) {        // solium-disable-next-line security/no-block-members        return block.timestamp;    }}