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// SPDX-License-Identifier: MIT

pragma solidity 0.8.20;

import "./interfaces/IAirdropSingleSidedStaking.sol";

import "./ArcadeSingleSidedStaking.sol";

import { ASS_CallerNotAirdropDistribution } from "../src/errors/SingleSidedStaking.sol";

contract AirdropSingleSidedStaking is IAirdropSingleSidedStaking, ArcadeSingleSidedStaking {
    address public airdropDistribution;

    /**
     * @notice Sets up the contract by initializing the deposit token and the owner.
     *
     * @param _owner                       The address of the contract owner.
     * @param _arcd                        The address of the deposit ERC20 token.
     * @param _airdropDistribution         The address of the airdrop distributor contract.
     */
    constructor(
        address _owner,
        address _arcd,
        address _airdropDistribution
    ) ArcadeSingleSidedStaking(_owner, _arcd) {
        if (address(_airdropDistribution) == address(0)) revert ASS_ZeroAddress("airdropDistribution");

        airdropDistribution = _airdropDistribution;
    }

    modifier onlyAirdropDistribution() {
        if(msg.sender != airdropDistribution) revert ASS_CallerNotAirdropDistribution();
        _;
    }

    /** @notice Receives an airdrop for a specific recipient with a specified amount, delegation,
     *          and lock period. This function is restricted to be called by the airdrop distribution
     *          account only and will call the internal `_deposit` function to handle the token
     *          transfer and voting power allocation.
     *
     * @param recipient                     The address of the user who will receive the airdropped tokens.
     * @param amount                        The amount of tokens that will be airdropped to the user.
     * @param delegation                    The address of the user's delegatee.
     * @param lock                          The lock period for the airdropped tokens.
     */
    function airdropReceive(
        address recipient,
        uint256 amount,
        address delegation,
        Lock lock
    ) external onlyAirdropDistribution {
        _deposit(recipient, amount, delegation, lock);
    }

    /** @notice Sets the airdrop distribution account that is allowed to call `airdropReceive`.
     *
     * @param _airdropDistribution            The address allowed caller.
     */
    function setAirdropDistribution(address _airdropDistribution) external onlyOwner {
        airdropDistribution = _airdropDistribution;

        emit AirdropDistributionSet(airdropDistribution);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.20;

import "./IArcadeSingleSidedStaking.sol";

interface IAirdropSingleSidedStaking is  IArcadeSingleSidedStaking {
    event AirdropDistributionSet(address indexed airdropDistribution);

    function airdropReceive(
        address recipient,
        uint256 amount,
        address delegation,
        Lock lock
    ) external;

    function setAirdropDistribution(address _airdropDistribution) external;

    function airdropDistribution() external view returns (address);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.20;

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/Pausable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

import "./external/council/interfaces/IVotingVault.sol";
import "./external/council/libraries/History.sol";
import "./external/council/libraries/Storage.sol";

import "./interfaces/IArcadeSingleSidedStaking.sol";

import {
    ASS_ZeroAddress,
    ASS_ZeroAmount,
    ASS_DepositToken,
    ASS_BalanceAmount,
    ASS_Locked,
    ASS_DepositCountExceeded,
    ASS_InvalidDelegationAddress,
    ASS_AmountTooBig
} from "../src/errors/SingleSidedStaking.sol";

/**
 * @title ArcadeSingleSidedStaking
 * @author Non-Fungible Technologies, Inc.
 *
 * @notice To optimize gas usage, unlockTimeStamp in struct UserDeposit is stored in
 *         uint32 format. This limits timestamp support to dates before 03:14:07 UTC on
 *         19 January 2038. Any time beyond this point will cause an overflow.
 *
 * The ArcadeSingleSidedStaking contract is set up like a traditional staking contract,
 * but with a twist: instead of earning tokens as rewards, users deposit their ARCD tokens
 * in the contract and get d’App points in return. Earned points are tallied up off-chain
 * and account towards the $ARCD Rewards program and its Levels.
 *
 * Upon depositing, users are required to commit to a lock period where tokens are
 * immovable, until the chosen lock period expires. Early  withdrawal is not permitted.
 * Users have the flexibility to make multiple deposits, each accruing points separately
 * until their lock period concludes.
 *
 * Should users choose not to withdraw their tokens post the lock period, the
 * funds will seamlessly transition into a subsequent points tracking cycle if
 * one should start. Unlike the initial deposit, the funds in the consequent point
 * tracking cycles are not bound by a lock period and can be freely withdrawn anytime.
 * Tracking cycles are defined and tracked in the dApp.
 *
 * The lock period gives users the opportunity to enhance their points earnings
 * with bonus multipliers that are contingent on the duration for which the user
 * chooses to lock their deposited tokens. These bonus calculations are tallied offchain.
 * The available lock durations are categorized as short, medium, and long. Each category
 * is associated with a progressively increasing multiplier that enhances the number of
 * point rewards accrued in the d'App, with the short duration offering the smallest and
 * the long duration offering the largest.
 *
 * In the exitAll() external function, it's necessary to limit the number of
 * processed transactions within the function's loops to prevent exceeding
 * the block gas limit. Because of this, the contract enforces a hard limit
 * on the number deposits a user can have per wallet address and consequently
 * on the number of iterations that can be processed in a single transaction.
 * This limit is defined by the MAX_DEPOSITS state variable. Should a user
 * necessitate making more than the MAX_DEPOSITS  number of deposits, they will
 * be required to use a different wallet address.
 *
 * The contract gives users governance capabilities by also serving as a voting
 * vault. When users deposit, they gain voting power which they can use in
 * ArcadeDAO governance. Users' voting power is automatically accrued to their account
 * and is delegated to their chosen delegatee's address on their behalf without the
 * need for them to call any additional transaction.
 * The ArcadeSingleSidedStaking contract governance functionality is adapted from the
 * Council LockingVault deployment at:
 * https://etherscan.io/address/0x7a58784063D41cb78FBd30d271F047F0b9156d6e#code
 *
 * Once a user makes their initial deposit, the voting power for any future deposits
 * will need to be delegated to the same address as in the initial deposit. To assign
 * a different delegate, users are required to use the changeDelegate() function.
 * A user's voting power is determined by the quantity of ARCD tokens they have deposited.
 */

contract ArcadeSingleSidedStaking is IArcadeSingleSidedStaking, IVotingVault, ReentrancyGuard, Ownable, Pausable {
    using SafeERC20 for IERC20;

    // Bring library into scope
    using History for History.HistoricalBalances;

    // ============================================ STATE ==============================================
    // ============== Constants ==============
    uint256 public constant MAX_DEPOSITS = 20;
    uint256 public constant SHORT_LOCK_TIME = 30 days;
    uint256 public constant MEDIUM_LOCK_TIME = 60 days;
    uint256 public constant LONG_LOCK_TIME = 150 days;

    // ============ Global State =============
    IERC20 public immutable arcd;

    mapping(address => UserDeposit[]) public deposits;

    uint256 public totalDeposits;

    // ========================================== CONSTRUCTOR ===========================================
    /**
     * @notice Sets up the contract by initializing the deposit token and setting the owner.
     *
     * @param _owner                       The address of the contract owner.
     * @param _arcd                        The address of the deposit ERC20 token.
     */
    constructor(
        address _owner,
        address _arcd
    ) Ownable(_owner) {
        if (address(_arcd) == address(0)) revert ASS_ZeroAddress("arcd");

        arcd = IERC20(_arcd);
    }

    // ========================================== VIEW FUNCTIONS =========================================
    /**
     * @notice Returns the total amount of deposited tokens held in the contract.
     *
     * @return uint256                     The amount of deposited tokens.
     */
    function totalSupply() external view returns (uint256) {
        return totalDeposits;
    }

    /**
     * @notice Returns the amount of tokens deposited by a user account.
     *
     * @param account                       The address of the account.
     *
     * @return userBalance                  The total amount that the user has deposited.
     */
    function getTotalUserDeposits(address account) external view returns (uint256 userBalance) {
        UserDeposit[] storage userDeposits = deposits[account];

        uint256 numUserDeposits = userDeposits.length;
        for (uint256 i = 0; i < numUserDeposits; ++i) {
            UserDeposit storage userDeposit = userDeposits[i];
            userBalance += userDeposit.amount;
        }
    }

    /**
     * @notice Returns the amount of deposited tokens pertaining to a specific deposit.
     *
     * @param account                       The address of the account.
     * @param depositId                     The specified deposit to get the balance of.
     *
     * @return depositBalance               The total amount committed to the deposit.
     */
    function balanceOfDeposit(address account, uint256 depositId) external view returns (uint256 depositBalance) {
        depositBalance = deposits[account][depositId].amount;
    }

    /**
     * @notice Returns information about a deposit.

     * @param account                           The user whose deposit to get.
     * @param depositId                         The specified deposit to get.
     *
     * @return lock                             Lock period committed.
     * @return unlockTimestamp                  Timestamp marking the end of the lock period.
     * @return amount                           Amount deposited.
     */
    function getUserDeposit(address account, uint256 depositId)
        external
        view
        returns (uint8 lock, uint32 unlockTimestamp, uint256 amount)
    {
        UserDeposit storage userDeposit = deposits[account][depositId];

        lock = uint8(userDeposit.lock);
        unlockTimestamp = userDeposit.unlockTimestamp;
        amount = userDeposit.amount;
    }

    /**
     * @notice Returns the last depositId, equivalent to userDeposits.length.
     *
     * @param account                           The user whose last deposit to get.
     *
     * @return lastDepositId                    Id of the last deposit.
     */
    function getLastDepositId(address account) external view returns (uint256 lastDepositId) {
        lastDepositId = deposits[account].length - 1;
    }

    /**
     * @notice Gets all of a user's active deposits.
     *
     * @param account                           The user whose deposits to get.
     *
     * @return activeDeposits                   Array of id's of the user's active deposits.
     */
    function getActiveDeposits(address account) external view returns (uint256[] memory) {
        UserDeposit[] storage userDeposits = deposits[account];
        uint256 activeCount = 0;

        uint256 numUserDeposits = userDeposits.length;
        for (uint256 i = 0; i < numUserDeposits; ++i) {
            UserDeposit storage userDeposit = userDeposits[i];
            if (userDeposit.amount > 0) {
                activeCount++;
            }
        }

        uint256[] memory activeDeposits = new uint256[](activeCount);
        uint256 activeIndex;

        for (uint256 i = 0; i < numUserDeposits; ++i) {
            if (userDeposits[i].amount > 0) {
                activeDeposits[activeIndex] = i;
                activeIndex++;
            }
        }

        return activeDeposits;
    }

    // ========================================= MUTATIVE FUNCTIONS ========================================
    /**
     * @notice Allows users to deposit their tokens, which are then tracked in the contract.
     *
     * @param amount                           The amount of tokens the user wishes to deposit and lock.
     * @param delegation                       The address to which the user's voting power will be delegated.
     * @param lock                             The chosen locking period for the deposited tokens.
     */
    function deposit(
        uint256 amount,
        address delegation,
        Lock lock
    ) external {
        _deposit(msg.sender, amount, delegation, lock);
    }

    /**
     * @notice Withdraws deposited tokens that are unlocked.  Allows for partial withdrawals.
     *
     * @param depositId                        The specified deposit to withdraw from.
     * @param amount                           The amount to be withdrawn.
     */
    function withdraw(uint256 amount, uint256 depositId) public whenNotPaused nonReentrant {
        if (amount == 0) revert ASS_ZeroAmount();
        UserDeposit storage userDeposit = deposits[msg.sender][depositId];
        if (userDeposit.amount == 0) revert ASS_BalanceAmount();
        if (block.timestamp < userDeposit.unlockTimestamp) revert ASS_Locked();

        if (amount > userDeposit.amount) amount = userDeposit.amount;

        _subtractVotingPower(amount, msg.sender);

        userDeposit.amount -= amount;

        totalDeposits -= amount;

        arcd.safeTransfer(msg.sender, amount);
        emit Withdrawn(msg.sender, depositId, amount, uint8(userDeposit.lock));
    }

    /**
     * @notice Allows users to withdraw deposited tokens for a specific deposit
     *         deposit id. Lock period needs to have ended.
     *
     * @param depositId                        The specified deposit to exit.
     */
    function exit(uint256 depositId) external {
        withdraw(type(uint256).max, depositId);
    }

    /**
     * @notice Allows users to withdraw all their deposited tokens in one transaction.
     *         Lock period needs to have ended.
     */
    function exitAll() external whenNotPaused nonReentrant {
        UserDeposit[] storage userDeposits = deposits[msg.sender];
        uint256 totalWithdrawAmount = 0;
        uint256 totalVotingPower = 0;
        uint256 numUserDeposits = userDeposits.length;

        for (uint256 i = 0; i < numUserDeposits; ++i) {
            UserDeposit storage userDeposit = userDeposits[i];
            uint256 amount = userDeposit.amount;
            if (amount == 0 || block.timestamp < userDeposit.unlockTimestamp) continue;

            userDeposit.amount -= amount;

            totalVotingPower += amount;
            totalWithdrawAmount += amount;

            emit Withdrawn(msg.sender, i, amount, uint8(userDeposit.lock));
        }

        if (totalVotingPower > 0) {
            _subtractVotingPower(totalVotingPower, msg.sender);
        }

        if (totalWithdrawAmount > 0) {
            totalDeposits -= totalWithdrawAmount;
            arcd.safeTransfer(msg.sender, totalWithdrawAmount);
        }
    }

    // ======================================== RESTRICTED FUNCTIONS =========================================
    /**
     * @notice Allows the contract owner to recover ERC20 tokens locked in the contract.
     *         Deposited ARCD tokens cannot be recovered, they can only be withdrawn
     *         by the depositing user.
     *
     * @param tokenAddress                       The address of the token to recover.
     * @param tokenAmount                        The amount of token to recover.
     */
    function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyOwner {
        if (tokenAddress == address(arcd)) revert ASS_DepositToken();
        if (tokenAddress == address(0)) revert ASS_ZeroAddress("token");
        if (tokenAmount == 0) revert ASS_ZeroAmount();

        IERC20(tokenAddress).safeTransfer(msg.sender, tokenAmount);

        emit Recovered(tokenAddress, tokenAmount);
    }

    /**
     * @notice Pauses the contract, callable by only the owner. Reversible.
     */
    function pause() external onlyOwner {
        _pause();
    }

    /**
     * @notice Unpauses the contract, callable by only the owner. Reversible.
     */
    function unpause() external onlyOwner {
        _unpause();
    }

    // ============================================== HELPERS ===============================================
    /**
     * @notice Internal deposit function updating a user's deposit balance information and voting
     *         power. The total supply of deposited tokens are updated accordingly.
     *
     * @param recipient                        The user whom the deposited tokens are allocated to.
     * @param amount                           The amount of tokens to deposit and lock.
     * @param delegation                       The address to which the user's voting power will be delegated.
     * @param lock                             The locking period for the deposited tokens.
     */
    function _deposit(
        address recipient,
        uint256 amount,
        address delegation,
        Lock lock
    ) internal nonReentrant whenNotPaused {
        if (amount == 0) revert ASS_ZeroAmount();
        if (delegation == address(0)) revert ASS_ZeroAddress("delegation");

        uint256 userDepositCount = deposits[recipient].length;
        if (userDepositCount >= MAX_DEPOSITS) revert ASS_DepositCountExceeded();

        uint256 lockDuration = _calculateLockDuration(lock);

        // update the vote power
        _addVotingPower(recipient, amount, delegation);

        // populate user deposit information
        deposits[recipient].push(
            UserDeposit({
                amount: amount,
                unlockTimestamp: uint32(block.timestamp + lockDuration),
                lock: lock
            })
        );

        totalDeposits += amount;

        arcd.safeTransferFrom(msg.sender, address(this), amount);

        emit Deposited(recipient, userDepositCount, amount, uint8(lock));
    }

    /**
     * @notice Calculates the lock duration for a user's deposit based on the selected lock SHORT, MEDIUM or LONG.
     *
     * @param lock                              The lock period committed.
     *
     * @return lockDuration                     The period duration for the selected lock.
     */
    function _calculateLockDuration(Lock lock) internal pure returns (uint256 lockDuration) {
        if (lock == Lock.Short) {
           lockDuration = SHORT_LOCK_TIME;
        } else if (lock == Lock.Medium) {
            lockDuration = MEDIUM_LOCK_TIME;
        } else if (lock == Lock.Long) {
            lockDuration = LONG_LOCK_TIME;
        }
    }

    /**
      * @notice This internal function is adapted from the external withdraw function in Council's
     *          LockingVault contract with 2 key modifications: it omits the token transfer transaction
     *          and adds an address account parameter to specify the user whose voting power needs updating.
     *          In the Locking Vault, msg.sender directly indicated the user, whereas in this context,
     *          msg.sender refers to the contract itself. Therefore, we explicitly pass the
     *          user's address.
     *
     * @param amount                           The amount of voting power to subtract.
     * @param account                          The account whose voting power to subtract.
     */
    function _subtractVotingPower(uint256 amount, address account) internal {
        if (amount > type(uint96).max) revert ASS_AmountTooBig();

        // Load our deposits storage
        Storage.AddressUint storage userData = _deposits()[account];

        // Reduce the user's stored balance
        userData.amount -= uint96(amount);
        address delegate = userData.who;

        // Reduce the delegate voting power
        // Get the storage pointer
        History.HistoricalBalances memory votingPower = _votingPower();
        // Load the most recent voter power stamp
        uint256 delegateeVotes = votingPower.loadTop(delegate);
        // remove the votes from the delegate
        votingPower.push(delegate, delegateeVotes - amount);
        // Emit an event to track votes
        emit VoteChange(account, delegate, -1 * int256(amount));
    }

    /**
     * @notice This internal function is adapted from the external deposit function in the Council
     *         LockingVault contract with 2 key modifications: it reverts if the specified delegation
     *         address does not match the user's previously designated delegate, and it no longer
     *         handles token transfers into the contract as these are handled by the deposit function.
     *
     * @param fundedAccount                    The address to credit the voting power to.
     * @param amount                           The amount of voting power to add.
     * @param delegation                       The user's delegatee address.
     */
    function _addVotingPower(
        address fundedAccount,
        uint256 amount,
        address delegation
    ) internal {
        if (amount > type(uint96).max) revert ASS_AmountTooBig();
        // No delegating to zero
        if (delegation == address(0)) revert ASS_ZeroAddress("delegation");

        // Load our deposits storage
        Storage.AddressUint storage userData = _deposits()[fundedAccount];
        // Load who has the user's votes
        address delegate = userData.who;

        if (delegate == address(0)) {
            // If the user is un-delegated we delegate to their indicated address
            delegate = delegation;
            // Set the delegation
            userData.who = delegate;
        } if (delegation != delegate) {
            revert ASS_InvalidDelegationAddress();
        }
        // Now we increase the user's balance
        userData.amount += uint96(amount);

        // Next we increase the delegation to their delegate
        // Get the storage pointer
        History.HistoricalBalances memory votingPower = _votingPower();
        // Load the most recent voter power stamp
        uint256 delegateeVotes = votingPower.loadTop(delegate);
        // Emit an event to track votes
        emit VoteChange(fundedAccount, delegate, int256(amount));
        // Add the newly deposited votes to the delegate
        votingPower.push(delegate, delegateeVotes + amount);
    }

    /**
     * @notice This function is taken from the Council LockingVault contract. It is a single
     *         endpoint for loading storage for deposits.
     *
     * @return                                  A storage mapping which can be used to look
     *                                          up deposit data.
     */
    function _deposits()
        internal
        pure
        returns (mapping(address => Storage.AddressUint) storage)
    {
        // This call returns a storage mapping with a unique non overwrite-able storage location
        // which can be persisted through upgrades, even if they change storage layout
        return (Storage.mappingAddressToPackedAddressUint("deposits"));
    }

    /**
     * @notice This function is taken from the Council LockingVault contract. Returns the
     *         historical voting power tracker.
     *
     *
     * @return                                  A struct which can push to and find items in
     *                                          block indexed storage.
     */
    function _votingPower()
        internal
        pure
        returns (History.HistoricalBalances memory)
    {
        // This call returns a storage mapping with a unique non overwrite-able storage location
        // which can be persisted through upgrades, even if they change storage layout
        return (History.load("votingPower"));
    }

    /**
     * @notice This function is taken from the Council LockingVault contract. Loads the voting
     *         power of a user. It is revised to no longer clear stale blocks from the queue
     *         in order to avoid gas depletion encountered with overly long queues.
     *
     * @param user                              The address we want to load the voting power of.
     * @param blockNumber                       The block number we want the user's voting power at.
     *
     * @return                                  The number of votes.
     */
    function queryVotePower(
        address user,
        uint256 blockNumber,
        bytes calldata
    ) external view override returns (uint256) {
        return queryVotePowerView(user, blockNumber);
    }

    /**
     * @notice This function is taken from the LockingVault contract. Loads the voting power of a
     *         user without any changes to state.
     *
     * @param user                              The address we want to load the voting power of.
     * @param blockNumber                       The block number we want the user's voting power at.
     *
     * @return                                  The number of votes.
     */
    function queryVotePowerView(address user, uint256 blockNumber)
        public
        view
        returns (uint256)
    {
        // Get our reference to historical data
        History.HistoricalBalances memory votingPower = _votingPower();
        // Find the historical datum
        return votingPower.find(user, blockNumber);
    }

    /**
     * @notice This function is taken from the Council LockingVault contract, it changes a user's
     *         voting power delegatee.
     *
     * @param newDelegate                        The new address which gets the voting power.
     */
    function changeDelegation(address newDelegate) external {
        // No delegating to zero
        if (newDelegate == address(0)) revert ASS_ZeroAddress("delegation");
        // Get the stored user data
        Storage.AddressUint storage userData = _deposits()[msg.sender];
        // Get the user balance
        uint256 userBalance = uint256(userData.amount);
        address oldDelegate = userData.who;
        // Reset the user delegation
        userData.who = newDelegate;
        // Reduce the old voting power
        // Get the storage pointer
        History.HistoricalBalances memory votingPower = _votingPower();
        // Load the old delegate's voting power
        uint256 oldDelegateVotes = votingPower.loadTop(oldDelegate);
        // Reduce the old voting power
        votingPower.push(oldDelegate, oldDelegateVotes - userBalance);
        // Emit an event to track votes
        emit VoteChange(msg.sender, oldDelegate, -1 * int256(userBalance));
        // Get the new delegate's votes
        uint256 newDelegateVotes = votingPower.loadTop(newDelegate);
        // Store the increase in power
        votingPower.push(newDelegate, newDelegateVotes + userBalance);
        // Emit an event tracking this voting power change
        emit VoteChange(msg.sender, newDelegate, int256(userBalance));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.20;

/**
 * @title SingleSidedStaking
 * @author Non-Fungible Technologies, Inc.
 *
 * This file contains all custom errors for the ArcadeSingleSidedStaking contract.
 * All errors are prefixed by  "ASS_" for ArcadeSingleSidedStaking. Errors located in one place
 * to make it possible to holistically look at all the failure cases.
 */

// ==================================== Arcade Single Sided Staking Errors ======================================

/**
 * @notice Zero address passed in where not allowed.
 * @param addressType                The name of the parameter for which a zero
 *                                   address was provided.
 */
error ASS_ZeroAddress(string addressType);

/**
 * @notice Cannot withdraw or stake amount zero.
 */
error ASS_ZeroAmount();

/**
 * @notice Deposit token cannot be ERC20 recovered.
 */
error ASS_DepositToken();

/**
 * @notice User tries to withdraw an amount greater than
 *         than their balance.
 */
error ASS_BalanceAmount();

/**
 * @notice Cannot withdraw a deposit which is still locked.
 */
error ASS_Locked();

/**
 * @notice Deposits number is larger than MAX_ITERATIONS.
 *
 */
error ASS_DepositCountExceeded();

/**
 * @notice The provided delegate address does not match their initial delegate.
 */
 error ASS_InvalidDelegationAddress();

/**
 * @notice Amount cannot exceed the maximum value that can be held by a uint96.
 */
 error ASS_AmountTooBig();

// ==================================== Airdrop Single Sided Staking Errors ======================================

 /**
 * @notice The caller is not authorized to make this call.
 */
 error ASS_CallerNotAirdropDistribution();

// SPDX-License-Identifier: MIT

pragma solidity 0.8.20;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

interface IArcadeSingleSidedStaking {
    // ================================================= EVENTS ==================================================
    event Deposited(address indexed user, uint256 depositId, uint256 amount, uint8 lock);
    event Withdrawn(address indexed user, uint256 depositId, uint256 amount, uint8 lock);
    event Recovered(address token, uint256 amount);
    event VoteChange(address indexed from, address indexed to, int256 amount);

    // ================================================= STRUCTS =================================================
    enum Lock {
        Short,
        Medium,
        Long
    }

    struct UserDeposit {
        Lock lock;
        uint32 unlockTimestamp;
        uint256 amount;
    }

    // ============================================= VIEW FUNCTIONS ==============================================
    function getTotalUserDeposits(address account) external view returns (uint256);

    function totalSupply() external view returns (uint256);

    function getActiveDeposits(address account) external view returns (uint256[] memory);

    function getLastDepositId(address account) external view returns (uint256);

    function getUserDeposit(address account, uint256 depositId) external view returns (uint8 lock, uint32 unlockTimestamp, uint256 amount);

    function balanceOfDeposit(address account, uint256 depositId) external view returns (uint256);

    // =========================================== MUTATIVE FUNCTIONS ============================================
    function exitAll() external;

    function exit(uint256 depositId) external;

    function deposit(uint256 amount, address firstDelegation, Lock lock) external;

    function withdraw(uint256 amount, uint256 depositId) external;

    function recoverERC20(address tokenAddress, uint256 tokenAmount) external;

    function pause() external;

    function unpause() external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev An operation with an ERC20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data);
        if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant NOT_ENTERED = 1;
    uint256 private constant ENTERED = 2;

    uint256 private _status;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _status = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // Any calls to nonReentrant after this point will fail
        _status = ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    bool private _paused;

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: Apache-2.0

pragma solidity 0.8.20;

interface IVotingVault {
    /// @notice Attempts to load the voting power of a user
    /// @param user The address we want to load the voting power of
    /// @param blockNumber the block number we want the user's voting power at
    /// @param extraData Abi encoded optional extra data used by some vaults, such as merkle proofs
    /// @return the number of votes
    function queryVotePower(
        address user,
        uint256 blockNumber,
        bytes calldata extraData
    ) external returns (uint256);
}

// SPDX-License-Identifier: Apache-2.0

pragma solidity 0.8.20;

import "./Storage.sol";

// This library is an assembly optimized storage library which is designed
// to track timestamp history in a struct which uses hash derived pointers.
// WARNING - Developers using it should not access the underlying storage
// directly since we break some assumptions of high level solidity. Please
// note this library also increases the risk profile of memory manipulation
// please be cautious in your usage of uninitialized memory structs and other
// anti patterns.
library History {
    // The storage layout of the historical array looks like this
    // [(128 bit min index)(128 bit length)] [0][0] ... [(64 bit block num)(192 bit data)] .... [(64 bit block num)(192 bit data)]
    // We give the option to the invoker of the search function the ability to clear
    // stale storage. To find data we binary search for the block number we need
    // This library expects the blocknumber indexed data to be pushed in ascending block number
    // order and if data is pushed with the same blocknumber it only retains the most recent.
    // This ensures each blocknumber is unique and contains the most recent data at the end
    // of whatever block it indexes [as long as that block is not the current one].

    // A struct which wraps a memory pointer to a string and the pointer to storage
    // derived from that name string by the storage library
    // WARNING - For security purposes never directly construct this object always use load
    struct HistoricalBalances {
        string name;
        // Note - We use bytes32 to reduce how easy this is to manipulate in high level sol
        bytes32 cachedPointer;
    }

    /// @notice The method by which inheriting contracts init the HistoricalBalances struct
    /// @param name The name of the variable. Note - these are globals, any invocations of this
    ///             with the same name work on the same storage.
    /// @return The memory pointer to the wrapper of the storage pointer
    function load(string memory name)
        internal
        pure
        returns (HistoricalBalances memory)
    {
        mapping(address => uint256[]) storage storageData =
            Storage.mappingAddressToUnit256ArrayPtr(name);
        bytes32 pointer;
        assembly {
            pointer := storageData.slot
        }
        return HistoricalBalances(name, pointer);
    }

    /// @notice An unsafe method of attaching the cached ptr in a historical balance memory objects
    /// @param pointer cached pointer to storage
    /// @return storageData A storage array mapping pointer
    /// @dev PLEASE DO NOT USE THIS METHOD WITHOUT SERIOUS REVIEW. IF AN EXTERNAL ACTOR CAN CALL THIS WITH
    //       ARBITRARY DATA THEY MAY BE ABLE TO OVERWRITE ANY STORAGE IN THE CONTRACT.
    function _getMapping(bytes32 pointer)
        private
        pure
        returns (mapping(address => uint256[]) storage storageData)
    {
        assembly {
            storageData.slot := pointer
        }
    }

    /// @notice This function adds a block stamp indexed piece of data to a historical data array
    ///         To prevent duplicate entries if the top of the array has the same blocknumber
    ///         the value is updated instead
    /// @param wrapper The wrapper which hold the reference to the historical data storage pointer
    /// @param who The address which indexes the array we need to push to
    /// @param data The data to append, should be at most 192 bits and will revert if not
    function push(
        HistoricalBalances memory wrapper,
        address who,
        uint256 data
    ) internal {
        // Check preconditions
        // OoB = Out of Bounds, short for contract bytecode size reduction
        require(data <= type(uint192).max, "OoB");
        // Get the storage this is referencing
        mapping(address => uint256[]) storage storageMapping =
            _getMapping(wrapper.cachedPointer);
        // Get the array we need to push to
        uint256[] storage storageData = storageMapping[who];
        // We load the block number and then shift it to be in the top 64 bits
        uint256 blockNumber = block.number << 192;
        // We combine it with the data, because of our require this will have a clean
        // top 64 bits
        uint256 packedData = blockNumber | data;
        // Load the array length
        (uint256 minIndex, uint256 length) = _loadBounds(storageData);
        // On the first push we don't try to load
        uint256 loadedBlockNumber = 0;
        if (length != 0) {
            (loadedBlockNumber, ) = _loadAndUnpack(storageData, length - 1);
        }
        // The index we push to, note - we use this pattern to not branch the assembly
        uint256 index = length;
        // If the caller is changing data in the same block we change the entry for this block
        // instead of adding a new one. This ensures each block numb is unique in the array.
        if (loadedBlockNumber == block.number) {
            index = length - 1;
        }
        // We use assembly to write our data to the index
        assembly {
            // Stores packed data in the equivalent of storageData[length]
            sstore(
                add(
                    // The start of the data slots
                    add(storageData.slot, 1),
                    // index where we store
                    index
                ),
                packedData
            )
        }
        // Reset the boundaries if they changed
        if (loadedBlockNumber != block.number) {
            _setBounds(storageData, minIndex, length + 1);
        }
    }

    /// @notice Loads the most recent timestamp of delegation power
    /// @param wrapper The memory struct which we want to search for historical data
    /// @param who The user who's balance we want to load
    /// @return the top slot of the array
    function loadTop(HistoricalBalances memory wrapper, address who)
        internal
        view
        returns (uint256)
    {
        // Load the storage pointer
        uint256[] storage userData = _getMapping(wrapper.cachedPointer)[who];
        // Load the length
        (, uint256 length) = _loadBounds(userData);
        // If it's zero no data has ever been pushed so we return zero
        if (length == 0) {
            return 0;
        }
        // Load the current top
        (, uint256 storedData) = _loadAndUnpack(userData, length - 1);
        // and return it
        return (storedData);
    }

    /// @notice Finds the data stored with the highest block number which is less than or equal to a provided
    ///         blocknumber.
    /// @param wrapper The memory struct which we want to search for historical data
    /// @param who The address which indexes the array to be searched
    /// @param blocknumber The blocknumber we want to load the historical data of
    /// @return The loaded unpacked data at this point in time.
    function find(
        HistoricalBalances memory wrapper,
        address who,
        uint256 blocknumber
    ) internal view returns (uint256) {
        // Get the storage this is referencing
        mapping(address => uint256[]) storage storageMapping =
            _getMapping(wrapper.cachedPointer);
        // Get the array we need to push to
        uint256[] storage storageData = storageMapping[who];
        // Pre load the bounds
        (uint256 minIndex, uint256 length) = _loadBounds(storageData);
        // Search for the blocknumber
        (, uint256 loadedData) =
            _find(storageData, blocknumber, 0, minIndex, length);
        // In this function we don't have to change the stored length data
        return (loadedData);
    }

    /// @notice Finds the data stored with the highest blocknumber which is less than or equal to a provided block number
    ///         Opportunistically clears any data older than staleBlock which is possible to clear.
    /// @param wrapper The memory struct which points to the storage we want to search
    /// @param who The address which indexes the historical data we want to search
    /// @param blocknumber The blocknumber we want to load the historical state of
    /// @param staleBlock A block number which we can [but are not obligated to] delete history older than
    /// @return The found data
    function findAndClear(
        HistoricalBalances memory wrapper,
        address who,
        uint256 blocknumber,
        uint256 staleBlock
    ) internal returns (uint256) {
        // Get the storage this is referencing
        mapping(address => uint256[]) storage storageMapping =
            _getMapping(wrapper.cachedPointer);
        // Get the array we need to push to
        uint256[] storage storageData = storageMapping[who];
        // Pre load the bounds
        (uint256 minIndex, uint256 length) = _loadBounds(storageData);
        // Search for the blocknumber
        (uint256 staleIndex, uint256 loadedData) =
            _find(storageData, blocknumber, staleBlock, minIndex, length);
        // We clear any data in the stale region
        // Note - Since find returns 0 if no stale data is found and we use > instead of >=
        //        this won't trigger if no stale data is found. Plus it won't trigger on minIndex == staleIndex
        //        == maxIndex and clear the whole array.
        if (staleIndex > minIndex) {
            // Delete the outdated stored info
            _clear(minIndex, staleIndex, storageData);
            // Reset the array info with stale index as the new minIndex
            _setBounds(storageData, staleIndex, length);
        }
        return (loadedData);
    }

    /// @notice Searches for the data stored at the largest blocknumber index less than a provided parameter.
    ///         Allows specification of a expiration stamp and returns the greatest examined index which is
    ///         found to be older than that stamp.
    /// @param data The stored data
    /// @param blocknumber the blocknumber we want to load the historical data for.
    /// @param staleBlock The oldest block that we care about the data stored for, all previous data can be deleted
    /// @param startingMinIndex The smallest filled index in the array
    /// @param length the length of the array
    /// @return Returns the largest stale data index seen or 0 for no seen stale data and the stored data
    function _find(
        uint256[] storage data,
        uint256 blocknumber,
        uint256 staleBlock,
        uint256 startingMinIndex,
        uint256 length
    ) private view returns (uint256, uint256) {
        // We explicitly revert on the reading of memory which is uninitialized
        require(length != 0, "uninitialized");
        // Do some correctness checks
        require(staleBlock <= blocknumber);
        require(startingMinIndex < length);
        // Load the bounds of our binary search
        uint256 maxIndex = length - 1;
        uint256 minIndex = startingMinIndex;
        uint256 staleIndex = 0;

        // We run a binary search on the block number fields in the array between
        // the minIndex and maxIndex. If we find indexes with blocknumber < staleBlock
        // we set staleIndex to them and return that data for an optional clearing step
        // in the calling function.
        while (minIndex != maxIndex) {
            // We use the ceil instead of the floor because this guarantees that
            // we pick the highest blocknumber less than or equal the requested one
            uint256 mid = (minIndex + maxIndex + 1) / 2;
            // Load and unpack the data in the midpoint index
            (uint256 pastBlock, uint256 loadedData) = _loadAndUnpack(data, mid);

            //  If we've found the exact block we are looking for
            if (pastBlock == blocknumber) {
                // Then we just return the data
                return (staleIndex, loadedData);

                // Otherwise if the loaded block is smaller than the block number
            } else if (pastBlock < blocknumber) {
                // Then we first check if this is possibly a stale block
                if (pastBlock < staleBlock) {
                    // If it is we mark it for clearing
                    staleIndex = mid;
                }
                // We then repeat the search logic on the indices greater than the midpoint
                minIndex = mid;

                // In this case the pastBlock > blocknumber
            } else {
                // We then repeat the search on the indices below the midpoint
                maxIndex = mid - 1;
            }
        }

        // We load at the final index of the search
        (uint256 _pastBlock, uint256 _loadedData) =
            _loadAndUnpack(data, minIndex);
        // This will only be hit if a user has misconfigured the stale index and then
        // tried to load father into the past than has been preserved
        require(_pastBlock <= blocknumber, "Search Failure");
        return (staleIndex, _loadedData);
    }

    /// @notice Clears storage between two bounds in array
    /// @param oldMin The first index to set to zero
    /// @param newMin The new minimum filled index, ie clears to index < newMin
    /// @param data The storage array pointer
    function _clear(
        uint256 oldMin,
        uint256 newMin,
        uint256[] storage data
    ) private {
        // Correctness checks on this call
        require(oldMin <= newMin);
        // This function is private and trusted and should be only called by functions which ensure
        // that oldMin < newMin < length
        assembly {
            // The layout of arrays in solidity is [length][data]....[data] so this pointer is the
            // slot to write to data
            let dataLocation := add(data.slot, 1)
            // Loop through each index which is below new min and clear the storage
            // Note - Uses strict min so if given an input like oldMin = 5 newMin = 5 will be a no op
            for {
                let i := oldMin
            } lt(i, newMin) {
                i := add(i, 1)
            } {
                // store at the starting data pointer + i 256 bits of zero
                sstore(add(dataLocation, i), 0)
            }
        }
    }

    /// @notice Loads and unpacks the block number index and stored data from a data array
    /// @param data the storage array
    /// @param i the index to load and unpack
    /// @return (block number, stored data)
    function _loadAndUnpack(uint256[] storage data, uint256 i)
        private
        view
        returns (uint256, uint256)
    {
        // This function is trusted and should only be called after checking data lengths
        // we use assembly for the sload to avoid reloading length.
        uint256 loaded;
        assembly {
            loaded := sload(add(add(data.slot, 1), i))
        }
        // Unpack the packed 64 bit block number and 192 bit data field
        return (
            loaded >> 192,
            loaded &
                0x0000000000000000ffffffffffffffffffffffffffffffffffffffffffffffff
        );
    }

    /// @notice This function sets our non standard bounds data field where a normal array
    ///         would have length
    /// @param data the pointer to the storage array
    /// @param minIndex The minimum non stale index
    /// @param length The length of the storage array
    function _setBounds(
        uint256[] storage data,
        uint256 minIndex,
        uint256 length
    ) private {
        // Correctness check
        require(minIndex < length);

        assembly {
            // Ensure data cleanliness
            let clearedLength := and(
                length,
                0x00000000000000000000000000000000ffffffffffffffffffffffffffffffff
            )
            // We move the min index into the top 128 bits by shifting it left by 128 bits
            let minInd := shl(128, minIndex)
            // We pack the data using binary or
            let packed := or(minInd, clearedLength)
            // We store in the packed data in the length field of this storage array
            sstore(data.slot, packed)
        }
    }

    /// @notice This function loads and unpacks our packed min index and length for our custom storage array
    /// @param data The pointer to the storage location
    /// @return minInd the first filled index in the array
    /// @return length the length of the array
    function _loadBounds(uint256[] storage data)
        private
        view
        returns (uint256 minInd, uint256 length)
    {
        // Use assembly to manually load the length storage field
        uint256 packedData;
        assembly {
            packedData := sload(data.slot)
        }
        // We use a shift right to clear out the low order bits of the data field
        minInd = packedData >> 128;
        // We use a binary and to extract only the bottom 128 bits
        length =
            packedData &
            0x00000000000000000000000000000000ffffffffffffffffffffffffffffffff;
    }
}

// SPDX-License-Identifier: Apache-2.0

pragma solidity 0.8.20;

// This library allows for secure storage pointers across proxy implementations
// It will return storage pointers based on a hashed name and type string.
library Storage {
    // This library follows a pattern which if solidity had higher level
    // type or macro support would condense quite a bit.

    // Each basic type which does not support storage locations is encoded as
    // a struct of the same name capitalized and has functions 'load' and 'set'
    // which load the data and set the data respectively.

    // All types will have a function of the form 'typename'Ptr('name') -> storage ptr
    // which will return a storage version of the type with slot which is the hash of
    // the variable name and type string. This pointer allows easy state management between
    // upgrades and overrides the default solidity storage slot system.

    /// @dev The address type container
    struct Address {
        address data;
    }

    /// @notice A function which turns a variable name for a storage address into a storage
    ///         pointer for its container.
    /// @param name the variable name
    /// @return data the storage pointer
    function addressPtr(string memory name)
        internal
        pure
        returns (Address storage data)
    {
        bytes32 typehash = keccak256("address");
        bytes32 offset = keccak256(abi.encodePacked(typehash, name));
        assembly {
            data.slot := offset
        }
    }

    /// @notice A function to load an address from the container struct
    /// @param input the storage pointer for the container
    /// @return the loaded address
    function load(Address storage input) internal view returns (address) {
        return input.data;
    }

    /// @notice A function to set the internal field of an address container
    /// @param input the storage pointer to the container
    /// @param to the address to set the container to
    function set(Address storage input, address to) internal {
        input.data = to;
    }

    /// @dev The uint256 type container
    struct Uint256 {
        uint256 data;
    }

    /// @notice A function which turns a variable name for a storage uint256 into a storage
    ///         pointer for its container.
    /// @param name the variable name
    /// @return data the storage pointer
    function uint256Ptr(string memory name)
        internal
        pure
        returns (Uint256 storage data)
    {
        bytes32 typehash = keccak256("uint256");
        bytes32 offset = keccak256(abi.encodePacked(typehash, name));
        assembly {
            data.slot := offset
        }
    }

    /// @notice A function to load an uint256 from the container struct
    /// @param input the storage pointer for the container
    /// @return the loaded uint256
    function load(Uint256 storage input) internal view returns (uint256) {
        return input.data;
    }

    /// @notice A function to set the internal field of a unit256 container
    /// @param input the storage pointer to the container
    /// @param to the address to set the container to
    function set(Uint256 storage input, uint256 to) internal {
        input.data = to;
    }

    /// @notice Returns the storage pointer for a named mapping of address to uint256
    /// @param name the variable name for the pointer
    /// @return data the mapping pointer
    function mappingAddressToUnit256Ptr(string memory name)
        internal
        pure
        returns (mapping(address => uint256) storage data)
    {
        bytes32 typehash = keccak256("mapping(address => uint256)");
        bytes32 offset = keccak256(abi.encodePacked(typehash, name));
        assembly {
            data.slot := offset
        }
    }

    /// @notice Returns the storage pointer for a named mapping of address to uint256[]
    /// @param name the variable name for the pointer
    /// @return data the mapping pointer
    function mappingAddressToUnit256ArrayPtr(string memory name)
        internal
        pure
        returns (mapping(address => uint256[]) storage data)
    {
        bytes32 typehash = keccak256("mapping(address => uint256[])");
        bytes32 offset = keccak256(abi.encodePacked(typehash, name));
        assembly {
            data.slot := offset
        }
    }

    /// @notice Allows external users to calculate the slot given by this lib
    /// @param typeString the string which encodes the type
    /// @param name the variable name
    /// @return the slot assigned by this lib
    function getPtr(string memory typeString, string memory name)
        external
        pure
        returns (uint256)
    {
        bytes32 typehash = keccak256(abi.encodePacked(typeString));
        bytes32 offset = keccak256(abi.encodePacked(typehash, name));
        return (uint256)(offset);
    }

    // A struct which represents 1 packed storage location with a compressed
    // address and uint96 pair
    struct AddressUint {
        address who;
        uint96 amount;
    }

    /// @notice Returns the storage pointer for a named mapping of address to uint256[]
    /// @param name the variable name for the pointer
    /// @return data the mapping pointer
    function mappingAddressToPackedAddressUint(string memory name)
        internal
        pure
        returns (mapping(address => AddressUint) storage data)
    {
        bytes32 typehash = keccak256("mapping(address => AddressUint)");
        bytes32 offset = keccak256(abi.encodePacked(typehash, name));
        assembly {
            data.slot := offset
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {IERC20Errors} from "../../interfaces/draft-IERC6093.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 */
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address account => uint256) private _balances;

    mapping(address account => mapping(address spender => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `value`.
     */
    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `value`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `value`.
     */
    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(address from, address to, uint256 value) internal virtual {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                _totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    /**
     * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
     * Relies on the `_update` mechanism
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    /**
     * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
     * Relies on the `_update` mechanism.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead
     */
    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    /**
     * @dev Sets `value` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     * ```
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `value`.
     *
     * Does not update the allowance value in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Does not emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
     * unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {FailedInnerCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
     */
    function _revert(bytes memory returndata) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert FailedInnerCall();
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}

{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 2
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": true,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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IArcadeSingleSidedStaking.Lock","name":"lock","type":"uint8"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"deposits","outputs":[{"internalType":"enum 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000000000000000000000000398e92c827c5fa0f33f171dc8e20570c5cff330e000000000000000000000000e020b01b6fbd83066aa2e8ee0ccd1eb8d9cc70bf000000000000000000000000398e92c827c5fa0f33f171dc8e20570c5cff330e

-----Decoded View---------------
Arg [0] : _owner (address): 0x398e92C827C5FA0F33F171DC8E20570c5CfF330e
Arg [1] : _arcd (address): 0xe020B01B6fbD83066aa2e8ee0CCD1eB8d9Cc70bF
Arg [2] : _airdropDistribution (address): 0x398e92C827C5FA0F33F171DC8E20570c5CfF330e

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000398e92c827c5fa0f33f171dc8e20570c5cff330e
Arg [1] : 000000000000000000000000e020b01b6fbd83066aa2e8ee0ccd1eb8d9cc70bf
Arg [2] : 000000000000000000000000398e92c827c5fa0f33f171dc8e20570c5cff330e