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// SPDX-License-Identifier: MIT

pragma solidity =0.8.28;

import {ITimelockMultiSigWallet} from "./ITimelockMultiSigWallet.sol";

contract TimelockMultiSigWallet is ITimelockMultiSigWallet {
    uint256 public constant EXECUTED_TIMESTAMP = uint256(1);

    mapping(uint256 txId => Transaction) public transactions;
    mapping(uint256 txId => uint256) public timestamps;
    mapping(uint256 txId => mapping(address owner => bool)) public isConfirmed;
    mapping(address owner => bool) public isOwner;

    address[] public owners;
    uint256 public transactionCount;
    uint256 public requiredConfirmations;
    uint256 public minDelay;

    modifier onlyOwner() {
        require(isOwner[msg.sender], UnAuthorizedCaller(msg.sender));
        _;
    }

    modifier onlyWallet() {
        require(msg.sender == address(this), InvalidAccess(msg.sender));
        _;
    }

    modifier onlyNotConfirmed(uint256 _txId) {
        require(
            !isConfirmed[_txId][msg.sender],
            CallerAlreadyConfirmed({txId: _txId, caller: msg.sender})
        );
        _;
    }

    /**
     * Transaction status
     * submitted -> fullyConfirmed -> scheduled(watting, ready) -> executed
     */
    modifier onlySubmittedTx(uint256 _txId) {
        require(_txId < transactionCount, UnsubmittedTx(_txId));
        _;
    }

    modifier onlyFullyConfirmed(uint256 _txId) {
        require(isFullyConfirmed(_txId), NotFullyConfirmedTx(_txId));
        _;
    }

    modifier onlyUnscheduled(uint256 _txId) {
        require(
            getScheduleStatus(_txId) == ScheduleStatus.Unscheduled,
            UnexpectedScheduleState({
                txId: _txId,
                expectedState: _encodeStateBitmap(ScheduleStatus.Unscheduled)
            })
        );
        _;
    }

    constructor(
        address[] memory _owners,
        uint256 _requiredConfirmations,
        uint256 _minDelay
    ) {
        uint256 ownersLen = _owners.length;
        require(
            ownersLen > 0,
            OwnersLengthNotEnough({newLength: ownersLen, minimum: 1})
        );
        require(
            _requiredConfirmations > 0 && _requiredConfirmations <= ownersLen,
            InvalidRequiredConfirmations({
                newRequired: _requiredConfirmations,
                maximum: ownersLen
            })
        );
        for (uint256 i = 0; i < ownersLen; i++) {
            address owner = _owners[i];
            require(owner != address(0), InvalidZeroAddress());
            require(!isOwner[owner], DuplicateOwner(owner));
            isOwner[owner] = true;
        }
        owners = _owners;

        requiredConfirmations = _requiredConfirmations;
        minDelay = _minDelay;
    }

    receive() external payable {
        emit Deposit(msg.sender, msg.value, address(this).balance);
    }

    function submitTx(
        address _to,
        uint256 _value,
        bytes calldata _data,
        uint256 _delay
    ) external onlyOwner {
        require(
            _delay >= minDelay,
            InsufficientDelay({delay: _delay, minDelay: minDelay})
        );

        uint256 txId = transactionCount;
        transactions[txId] = Transaction({
            to: _to,
            value: _value,
            data: _data,
            delay: _delay
        });
        transactionCount++;
        emit SubmitTx({txId: txId, submittedBy: msg.sender});

        _confirmTx(txId);
        if (requiredConfirmations == 1) _scheduleTx(txId);
    }

    function confirmTx(
        uint256 _txId
    )
        external
        onlyOwner
        onlySubmittedTx(_txId)
        onlyNotConfirmed(_txId)
        onlyUnscheduled(_txId)
    {
        _confirmTx(_txId);
        if (isFullyConfirmed(_txId)) _scheduleTx(_txId);
    }

    function revokeConfirmation(
        uint256 _txId
    ) external onlyOwner onlySubmittedTx(_txId) onlyUnscheduled(_txId) {
        require(
            isConfirmed[_txId][msg.sender],
            CallerNotConfirmed({txId: _txId, caller: msg.sender})
        );
        isConfirmed[_txId][msg.sender] = false;
        emit RevokeConfirmation({txId: _txId, revokedBy: msg.sender});
    }

    /**
     * @dev Changes the transaction status to 'executed' to prevent further confirmation or execution
     */
    function cancelTx(uint256 _txId) public onlyWallet onlySubmittedTx(_txId) {
        require(
            !isScheduleExecuted(_txId),
            UnexpectedScheduleState({
                txId: _txId,
                expectedState: _encodeStateBitmap(ScheduleStatus.Unscheduled) |
                    _encodeStateBitmap(ScheduleStatus.Waiting) |
                    _encodeStateBitmap(ScheduleStatus.Ready)
            })
        );
        delete transactions[_txId];
        timestamps[_txId] = EXECUTED_TIMESTAMP;
        emit CancelTx({txId: _txId, canceledBy: msg.sender});
    }

    function executeTx(
        uint256 _txId
    ) public onlyOwner onlySubmittedTx(_txId) onlyFullyConfirmed(_txId) {
        Transaction storage transaction = transactions[_txId];
        uint256 value = transaction.value;
        uint256 balance = address(this).balance;
        require(
            balance >= value,
            NotEnoughBalance({have: balance, need: value})
        );

        _beforeCall(_txId);
        (bool success, bytes memory data) = transaction.to.call{value: value}(
            transaction.data
        );
        if (!success) {
            assembly {
                revert(add(data, 32), mload(data))
            }
        }
        _afterCall(_txId);

        emit ExecuteTx({txId: _txId, executedBy: msg.sender});
    }

    function _beforeCall(uint256 _txId) private view {
        require(
            isScheduleReady(_txId),
            UnexpectedScheduleState({
                txId: _txId,
                expectedState: _encodeStateBitmap(ScheduleStatus.Ready)
            })
        );
    }

    function _afterCall(uint256 _txId) private {
        require(
            isScheduleReady(_txId),
            UnexpectedScheduleState({
                txId: _txId,
                expectedState: _encodeStateBitmap(ScheduleStatus.Ready)
            })
        );
        timestamps[_txId] = EXECUTED_TIMESTAMP;
    }

    function addOwner(address _owner) external onlyWallet {
        require(_owner != address(0), InvalidZeroAddress());
        require(!isOwner[_owner], DuplicateOwner(_owner));

        isOwner[_owner] = true;
        owners.push(_owner);

        emit AddOwner(_owner);
    }

    function removeOwner(address _owner) external onlyWallet {
        require(isOwner[_owner], NotOwnerAddress(_owner));
        uint256 newOwnerLength = owners.length - 1;
        require(
            newOwnerLength >= requiredConfirmations,
            OwnersLengthNotEnough(newOwnerLength, requiredConfirmations)
        );

        isOwner[_owner] = false;
        uint256 len = owners.length;
        for (uint256 i = 0; i < len; i++) {
            if (owners[i] == _owner) {
                owners[i] = owners[len - 1];
                owners.pop();
                break;
            }
        }

        emit RemoveOwner(_owner);
    }

    function changeOwner(
        address _oldOwner,
        address _newOwner
    ) external onlyWallet {
        require(isOwner[_oldOwner], NotOwnerAddress(_oldOwner));
        require(!isOwner[_newOwner], DuplicateOwner(_newOwner));
        require(_newOwner != address(0), InvalidZeroAddress());

        isOwner[_oldOwner] = false;
        isOwner[_newOwner] = true;
        uint256 len = owners.length;
        for (uint256 i = 0; i < len; i++) {
            if (owners[i] == _oldOwner) {
                owners[i] = _newOwner;
                break;
            }
        }

        emit ChangeOwner(_oldOwner, _newOwner);
    }

    function changeRequiredConfirmations(uint8 _required) external onlyWallet {
        uint256 maximum = owners.length;
        require(
            _required > 0 && _required <= maximum,
            InvalidRequiredConfirmations({
                newRequired: _required,
                maximum: maximum
            })
        );
        requiredConfirmations = _required;
        emit ChangeRequiredConfirmations(_required);
    }

    function changeMinDelay(uint256 _newDelay) external onlyWallet {
        minDelay = _newDelay;
        emit ChangeMinDelay({oldDelay: minDelay, newDelay: _newDelay});
    }

    function _confirmTx(uint256 _txId) private {
        isConfirmed[_txId][msg.sender] = true;
        emit ConfirmTx({txId: _txId, confirmedBy: msg.sender});
    }

    function _scheduleTx(uint256 _txId) private {
        uint256 timestamp = block.timestamp + transactions[_txId].delay;
        timestamps[_txId] = timestamp;
        emit ScheduleTx({txId: _txId, timestamp: timestamp});
    }

    function isFullyConfirmed(uint256 _txId) public view returns (bool) {
        uint256 count = 0;
        uint256 len = owners.length;
        for (uint256 i = 0; i < len; i++) {
            if (isConfirmed[_txId][owners[i]]) {
                count += 1;
            }
            if (count == requiredConfirmations) {
                return true;
            }
        }
        return false;
    }

    function isSchedulePending(uint256 _txId) public view returns (bool) {
        ScheduleStatus state = getScheduleStatus(_txId);
        return state == ScheduleStatus.Waiting || state == ScheduleStatus.Ready;
    }

    function isScheduleReady(uint256 _txId) public view returns (bool) {
        return getScheduleStatus(_txId) == ScheduleStatus.Ready;
    }

    function isScheduleExecuted(uint256 _txId) public view returns (bool) {
        return getScheduleStatus(_txId) == ScheduleStatus.Executed;
    }

    function getConfirmCount(uint256 _txId) public view returns (uint256) {
        uint256 count = 0;
        uint256 len = owners.length;
        for (uint256 i = 0; i < len; i++) {
            if (isConfirmed[_txId][owners[i]]) {
                count += 1;
            }
        }
        return count;
    }

    function getScheduleStatus(
        uint256 _txId
    ) public view returns (ScheduleStatus) {
        uint256 timestamp = timestamps[_txId];
        if (timestamp == 0) {
            return ScheduleStatus.Unscheduled;
        } else if (timestamp == EXECUTED_TIMESTAMP) {
            return ScheduleStatus.Executed;
        } else if (timestamp > block.timestamp) {
            return ScheduleStatus.Waiting;
        } else {
            return ScheduleStatus.Ready;
        }
    }

    function getTransactionsInfo(
        uint256[] memory _txIds
    )
        external
        view
        returns (
            ScheduleStatus[] memory status,
            uint256[] memory confirmCounts,
            Transaction[] memory txs
        )
    {
        uint256 txIdsLength = _txIds.length;
        require(txIdsLength > 0);
        status = new ScheduleStatus[](txIdsLength);
        confirmCounts = new uint256[](txIdsLength);
        txs = new Transaction[](txIdsLength);

        for (uint256 i = 0; i < txIdsLength; i++) {
            uint256 id = _txIds[i];
            status[i] = getScheduleStatus(id);
            confirmCounts[i] = getConfirmCount(id);
            txs[i] = transactions[id];
        }
    }

    function getOwnersLen() external view returns (uint256) {
        return owners.length;
    }

    function getOwners() external view returns (address[] memory) {
        return owners;
    }

    /**
     * 0x000...1000
     *   ^^^^^^----- ...
     *         ^---- Executed
     *          ^--- Ready
     *           ^-- Waiting
     *            ^- Unscheduled
     */
    function _encodeStateBitmap(
        ScheduleStatus _scheduleStatus
    ) private pure returns (bytes32) {
        return bytes32(1 << uint8(_scheduleStatus));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity =0.8.28;

interface ITimelockMultiSigWallet {
    struct Transaction {
        address to;
        uint256 value;
        uint256 delay;
        bytes data;
    }

    enum ScheduleStatus {
        Unscheduled,
        Waiting,
        Ready,
        Executed
    }

    // events
    event SubmitTx(uint256 indexed txId, address indexed submittedBy);

    event ConfirmTx(uint256 indexed txId, address indexed confirmedBy);

    event RevokeConfirmation(uint256 indexed txId, address indexed revokedBy);

    event ScheduleTx(uint256 indexed txId, uint256 timestamp);

    event CancelTx(uint256 indexed txId, address indexed canceledBy);

    event AddOwner(address indexed owner);

    event ChangeMinDelay(uint256 oldDelay, uint256 newDelay);

    event ChangeOwner(address indexed oldOwner, address indexed newOwner);

    event ChangeRequiredConfirmations(uint8 required);

    event Deposit(address indexed sender, uint256 amount, uint256 balance);

    event ExecuteTx(uint256 indexed txId, address indexed executedBy);

    event RemoveOwner(address indexed revokedOwner);

    // errors
    error UnAuthorizedCaller(address caller);

    error InvalidAccess(address caller);

    error CallerAlreadyConfirmed(uint256 txId, address caller);

    error CallerNotConfirmed(uint256 txId, address caller);

    error UnsubmittedTx(uint256 txId);

    error NotFullyConfirmedTx(uint256 txId);

    error UnexpectedScheduleState(uint256 txId, bytes32 expectedState);

    error NotEnoughBalance(uint256 have, uint256 need);

    error InvalidZeroAddress();

    error NotOwnerAddress(address addr);

    error DuplicateOwner(address addr);

    error OwnersLengthNotEnough(uint256 newLength, uint256 minimum);

    error InvalidRequiredConfirmations(uint256 newRequired, uint256 maximum);

    error InsufficientDelay(uint256 delay, uint256 minDelay);

    // functions
    receive() external payable;

    function EXECUTED_TIMESTAMP() external view returns (uint256);

    function addOwner(address _owner) external;

    function cancelTx(uint256 _txId) external;

    function changeMinDelay(uint256 _newDelay) external;

    function changeOwner(address _oldOwner, address _newOwner) external;

    function changeRequiredConfirmations(uint8 _required) external;

    function confirmTx(uint256 _txId) external;

    function executeTx(uint256 _txId) external;

    function getConfirmCount(uint256 _txId) external view returns (uint256);

    function getOwners() external view returns (address[] memory);

    function getOwnersLen() external view returns (uint256);

    function getScheduleStatus(
        uint256 _txId
    ) external view returns (ITimelockMultiSigWallet.ScheduleStatus);

    function isConfirmed(
        uint256 txId,
        address owner
    ) external view returns (bool);

    function isFullyConfirmed(uint256 _txId) external view returns (bool);

    function isOwner(address owner) external view returns (bool);

    function isScheduleExecuted(uint256 _txId) external view returns (bool);

    function isSchedulePending(uint256 _txId) external view returns (bool);

    function isScheduleReady(uint256 _txId) external view returns (bool);

    function minDelay() external view returns (uint256);

    function owners(uint256) external view returns (address);

    function removeOwner(address _owner) external;

    function requiredConfirmations() external view returns (uint256);

    function revokeConfirmation(uint256 _txId) external;

    function submitTx(
        address _to,
        uint256 _value,
        bytes memory _data,
        uint256 _delay
    ) external;

    function timestamps(uint256 txId) external view returns (uint256);

    function transactionCount() external view returns (uint256);

    function transactions(
        uint256 txId
    )
        external
        view
        returns (address to, uint256 value, uint256 delay, bytes memory data);

    function getTransactionsInfo(
        uint256[] memory _txIds
    )
        external
        view
        returns (
            ScheduleStatus[] memory status,
            uint256[] memory confirmCounts,
            Transaction[] memory txs
        );
}

{
  "remappings": [
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "ds-test/=lib/openzeppelin-contracts-upgradeable/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts-upgradeable/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "halmos-cheatcodes/=lib/openzeppelin-contracts-upgradeable/lib/halmos-cheatcodes/src/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "shanghai",
  "viaIR": false,
  "libraries": {}
}

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ITimelockMultiSigWallet.ScheduleStatus","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_txIds","type":"uint256[]"}],"name":"getTransactionsInfo","outputs":[{"internalType":"enum ITimelockMultiSigWallet.ScheduleStatus[]","name":"status","type":"uint8[]"},{"internalType":"uint256[]","name":"confirmCounts","type":"uint256[]"},{"components":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"delay","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct ITimelockMultiSigWallet.Transaction[]","name":"txs","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"txId","type":"uint256"},{"internalType":"address","name":"owner","type":"address"}],"name":"isConfirmed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_txId","type":"uint256"}],"name":"isFullyConfirmed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_txId","type":"uint256"}],"name":"isScheduleExecuted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_txId","type":"uint256"}],"name":"isSchedulePending","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_txId","type":"uint256"}],"name":"isScheduleReady","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minDelay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"owners","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"removeOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"requiredConfirmations","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_txId","type":"uint256"}],"name":"revokeConfirmation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"},{"internalType":"uint256","name":"_delay","type":"uint256"}],"name":"submitTx","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"txId","type":"uint256"}],"name":"timestamps","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"transactionCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"txId","type":"uint256"}],"name":"transactions","outputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"delay","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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