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// SPDX-License-Identifier: MIT
pragma solidity 0.8.26;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import {Pausable} from "@openzeppelin/contracts/utils/Pausable.sol";

interface IVestingVault {

    function claimVestedFromStaking(address user) external returns (uint256);
    function getClaimableAmount(address user) external view returns (uint256);
    function getNonStakedAllocation(address user) external view returns (uint256);

}

contract StakingHandler is Ownable, Pausable, ReentrancyGuard {

    using SafeERC20 for IERC20;

    address public presale;
    IERC20 public tokenContract;

    IVestingVault public vestingVault;
    uint256 public tokensStaked;
    uint256 public tokensStakedByPresale;
    uint256 public vestingStart;
    bool public claimLock;
    uint256 public apy;
    uint256 public lastMultUpdate;
    uint256 public globalRewardMultiplier;
    uint256 public constant DENOM = 100_000;
    uint256 public constant SECONDS_IN_YEAR = 31_536_000;
    uint256 public constant BASE = 1 ether;

    uint256 public constant REWARD_POOL_CAP = 323_606_798 ether;
    uint256 public rewardsDistributed;
    bool public migrationMode = true;

    struct HolderStake {
        uint256 tokenAmount;
        uint256 lastUpdatedTime;
        uint256 lastRewardMultiplier;
        uint256 rewardDebt;
    }

    mapping(address => HolderStake) public holderStake;
    mapping(address => uint256) public presaleStaked;

    event MigrationCompleted();
    event MigrationDataSet(uint256 tokensStaked, uint256 tokensStakedByPresale);
    event UserStakingDataMigrated(address[] users, uint256[] amounts, uint256 presaleStartTime);
    event TokensStaked(address indexed user, uint256 amount, uint256 ts);
    event Withdraw(address indexed user, uint256 amount);
    event ClaimRewards(address indexed user, uint256 amount);
    event APYUpdated(uint256 oldAPY, uint256 newAPY, uint256 ts);
    event VestingVaultUpdated(address indexed vault);
    event PresaleTokensClaimed(address indexed user, uint256 amount);
    event VestingStartSet(uint256 vestingStart);

    error ZeroAddress();
    error ZeroStakeAmount();
    error InvalidTokenAmount();
    error NotEnoughUnlocked();
    error APYUnchanged();
    error RewardPoolEmpty();
    error NotEnoughRewards();

    constructor(address _presale, uint256 _apy) Ownable(msg.sender) {
        if (_presale == address(0)) {
            revert ZeroAddress();
        }
        presale = _presale;
        apy = _apy;
        claimLock = true;
        lastMultUpdate = block.timestamp;
    }

    modifier onlyPresale() {
        _onlyPresale();
        _;
    }

    function _onlyPresale() internal view {
        require(msg.sender == presale, "Only presale");
    }

    function completeMigration() external onlyOwner {
        migrationMode = false;
        emit MigrationCompleted();
    }

    function setMigrationData(
        uint256 _tokensStaked,
        uint256 _tokensStakedByPresale,
        address _vestingVault
    ) external onlyOwner {
        require(migrationMode, "Migration already completed");

        require(vestingStart == 0, "Vesting start already set");

        tokensStaked = _tokensStaked;
        tokensStakedByPresale = _tokensStakedByPresale;
        vestingVault = IVestingVault(_vestingVault);
        emit VestingVaultUpdated(_vestingVault);

        emit MigrationDataSet(_tokensStaked, _tokensStakedByPresale);
    }

    function migrateUserStakingData(address[] calldata users, uint256[] calldata amounts, uint256 presaleStartTime)
        external
        onlyOwner
    {
        require(migrationMode, "Migration already completed");
        require(users.length == amounts.length, "Arrays length mismatch");

        for (uint256 i = 0; i < users.length; ++i) {
            address user = users[i];
            uint256 amount = amounts[i];

            holderStake[user] = HolderStake({
                tokenAmount: amount,
                lastUpdatedTime: presaleStartTime,
                lastRewardMultiplier: globalRewardMultiplier,
                rewardDebt: 0
            });

            presaleStaked[user] = amount;
        }

        emit UserStakingDataMigrated(users, amounts, presaleStartTime);
    }

    function setVestingVault(address _vault) external onlyOwner {
        if (_vault == address(0)) {
            revert ZeroAddress();
        }
        vestingVault = IVestingVault(_vault);
        emit VestingVaultUpdated(_vault);
    }

    function stake(uint256 amount) external whenNotPaused nonReentrant {
        if (amount == 0) {
            revert ZeroStakeAmount();
        }

        _updateGlobalRewardMultiplier();
        _updateHolderRewards(msg.sender);

        HolderStake storage S = holderStake[msg.sender];
        S.tokenAmount += amount;
        S.lastUpdatedTime = block.timestamp;
        S.lastRewardMultiplier = globalRewardMultiplier;

        tokensStaked += amount;
        tokenContract.safeTransferFrom(msg.sender, address(this), amount);

        emit TokensStaked(msg.sender, amount, block.timestamp);
    }

    function stakeByPresale(address user, uint256 amount) external onlyPresale {
        if (user == address(0)) {
            revert ZeroAddress();
        }
        if (amount == 0) {
            revert ZeroStakeAmount();
        }

        _updateGlobalRewardMultiplier();
        _updateHolderRewards(user);

        HolderStake storage S = holderStake[user];
        S.tokenAmount += amount;
        S.lastUpdatedTime = block.timestamp;
        S.lastRewardMultiplier = globalRewardMultiplier;

        tokensStaked += amount;
        tokensStakedByPresale += amount;
        presaleStaked[user] += amount;

        emit TokensStaked(user, amount, block.timestamp);
    }

    function stakeFromWallet(address user, uint256 amount) external onlyPresale {
        _updateGlobalRewardMultiplier();
        _updateHolderRewards(user);

        HolderStake storage S = holderStake[user];
        S.tokenAmount += amount;
        S.lastUpdatedTime = block.timestamp;
        S.lastRewardMultiplier = globalRewardMultiplier;

        tokensStaked += amount;

        emit TokensStaked(user, amount, block.timestamp);
    }

    function withdraw(uint256 amount) external whenNotPaused nonReentrant {
        HolderStake storage S = holderStake[msg.sender];
        if (amount == 0 || amount > S.tokenAmount) {
            revert InvalidTokenAmount();
        }

        _updateGlobalRewardMultiplier();
        _updateHolderRewards(msg.sender);

        uint256 presaleAmount = presaleStaked[msg.sender];
        uint256 regularAmount = S.tokenAmount - presaleAmount;

        uint256 presaleWithdrawn = 0;
        uint256 regularWithdrawn = 0;

        if (amount <= presaleAmount) {
            if (presaleAmount > 0) {
                presaleWithdrawn = vestingVault.claimVestedFromStaking(msg.sender);
                if (presaleWithdrawn < amount) {
                    revert NotEnoughUnlocked();
                }
            }
        } else {
            if (presaleAmount > 0) {
                presaleWithdrawn = vestingVault.claimVestedFromStaking(msg.sender);
            }
            regularWithdrawn = amount - presaleWithdrawn;

            if (regularWithdrawn > regularAmount) {
                revert InvalidTokenAmount();
            }

            if (regularWithdrawn > 0) {
                tokenContract.safeTransfer(msg.sender, regularWithdrawn);
            }
        }

        uint256 totalWithdrawn = presaleWithdrawn + regularWithdrawn;

        if (totalWithdrawn != amount) {
            revert InvalidTokenAmount();
        }

        S.tokenAmount -= totalWithdrawn;
        tokensStaked -= totalWithdrawn;

        if (presaleWithdrawn > 0) {
            presaleStaked[msg.sender] -= presaleWithdrawn;
            tokensStakedByPresale -= presaleWithdrawn;
        }

        _adjustRewardMultiplierForWithdrawal(msg.sender, totalWithdrawn);

        emit Withdraw(msg.sender, totalWithdrawn);
        if (presaleWithdrawn > 0) {
            emit PresaleTokensClaimed(msg.sender, presaleWithdrawn);
        }
    }

    function _adjustRewardMultiplierForWithdrawal(address user, uint256 withdrawnAmount) internal {
        HolderStake storage S = holderStake[user];

        if (S.tokenAmount > 0) {
            uint256 reductionRatio = (withdrawnAmount * BASE) / S.tokenAmount;
            uint256 rewardReduction = (S.rewardDebt * reductionRatio) / BASE;

            S.rewardDebt = S.rewardDebt > rewardReduction ? S.rewardDebt - rewardReduction : 0;
        }
    }

    function _updateHolderRewards(address holder) internal {
        HolderStake storage S = holderStake[holder];
        if (S.tokenAmount == 0) {
            return;
        }

        uint256 pending = (S.tokenAmount * (globalRewardMultiplier - S.lastRewardMultiplier)) / BASE;
        S.rewardDebt += pending;
        S.lastRewardMultiplier = globalRewardMultiplier;
    }

    function _updateGlobalRewardMultiplier() internal {
        if (block.timestamp <= lastMultUpdate) {
            return;
        }

        uint256 elapsed = block.timestamp - lastMultUpdate;
        uint256 reward = (apy * elapsed * BASE) / (SECONDS_IN_YEAR * DENOM);
        globalRewardMultiplier += reward;
        lastMultUpdate = block.timestamp;
    }

    function getAccumulatedRewards(address holder) public view returns (uint256) {
        HolderStake memory S = holderStake[holder];
        if (S.tokenAmount == 0) {
            return 0;
        }

        uint256 pendingMult = globalRewardMultiplier;
        if (block.timestamp > lastMultUpdate) {
            uint256 elapsed = block.timestamp - lastMultUpdate;
            uint256 rewardInc = (apy * elapsed * BASE) / (SECONDS_IN_YEAR * DENOM);
            pendingMult += rewardInc;
        }

        uint256 pending = (S.tokenAmount * (pendingMult - S.lastRewardMultiplier)) / BASE;
        uint256 total = S.rewardDebt + pending;
        uint256 remaining = REWARD_POOL_CAP - rewardsDistributed;
        return total > remaining ? remaining : total;
    }

    function claimRewards() external whenNotPaused nonReentrant {
        if (claimLock) {
            revert RewardPoolEmpty();
        }

        _updateGlobalRewardMultiplier();
        _updateHolderRewards(msg.sender);
        HolderStake storage s = holderStake[msg.sender];

        uint256 amount = s.rewardDebt;
        if (amount == 0) {
            revert InvalidTokenAmount();
        }
        if (rewardsDistributed + amount > REWARD_POOL_CAP) {
            revert RewardPoolEmpty();
        }

        s.rewardDebt = 0;
        rewardsDistributed += amount;
        tokenContract.safeTransfer(msg.sender, amount);

        emit ClaimRewards(msg.sender, amount);
    }

    function updateAPY(uint256 newAPY) external onlyOwner {
        if (newAPY == 0 || newAPY == apy) {
            revert APYUnchanged();
        }

        _updateGlobalRewardMultiplier();
        emit APYUpdated(apy, newAPY, block.timestamp);
        apy = newAPY;
    }

    function setClaimLock(bool lock_) external onlyOwner {
        claimLock = lock_;
    }

    function setPresale(address presale_) external onlyOwner {
        presale = presale_;
    }

    function setStakeToken(address token_) external onlyOwner {
        tokenContract = IERC20(token_);
    }

    function setVestingStart(uint256 start_) external onlyOwner {
        require(vestingStart == 0, "Vesting start already set");
        vestingStart = start_;
        emit VestingStartSet(start_);
    }

    function emergencyWithdraw(address tokenAddress, uint256 amount) external onlyOwner {
        IERC20(tokenAddress).safeTransfer(owner(), amount);
    }

    function pause() external onlyOwner {
        _pause();
    }

    function unpause() external onlyOwner {
        _unpause();
    }

    function batchMigrateUserStakingData(
        address[][] calldata userBatches,
        uint256[][] calldata amountBatches,
        uint256 presaleStartTime
    ) external onlyOwner {
        require(migrationMode, "Migration already completed");
        require(userBatches.length == amountBatches.length, "Batch arrays length mismatch");

        for (uint256 j = 0; j < userBatches.length; j++) {
            address[] calldata users = userBatches[j];
            uint256[] calldata amounts = amountBatches[j];
            require(users.length == amounts.length, "Arrays length mismatch");

            for (uint256 i = 0; i < users.length; i++) {
                address user = users[i];
                uint256 amount = amounts[i];

                holderStake[user] = HolderStake({
                    tokenAmount: amount,
                    lastUpdatedTime: presaleStartTime,
                    lastRewardMultiplier: globalRewardMultiplier,
                    rewardDebt: 0
                });

                presaleStaked[user] = amount;
            }

            emit UserStakingDataMigrated(users, amounts, presaleStartTime);
        }
    }

    bool public rebaseEnabled = true;
    bool public rebaseFinalized = false;

    event RebaseApplied(uint256 users, uint256 ts);
    event RebaseFinalized(uint256 ts);

    function ownerRebaseStake(address[] calldata users, uint256[] calldata rewardBaseline, uint256 newLastUpdatedTime)
        external
        onlyOwner
    {
        require(migrationMode, "Migration completed");
        require(rebaseEnabled && !rebaseFinalized, "Rebase disabled");
        require(users.length == rewardBaseline.length, "len mismatch");
        require(newLastUpdatedTime > 0, "bad ts");

        _updateGlobalRewardMultiplier();

        for (uint256 i = 0; i < users.length; ++i) {
            address u = users[i];
            HolderStake storage S = holderStake[u];

            if (S.tokenAmount == 0) {
                continue;
            }

            S.rewardDebt = rewardBaseline[i];
            S.lastUpdatedTime = newLastUpdatedTime;
            S.lastRewardMultiplier = globalRewardMultiplier;
        }

        emit RebaseApplied(users.length, newLastUpdatedTime);
    }

    function finalizeRebase() external onlyOwner {
        require(migrationMode, "Migration completed");
        require(rebaseEnabled && !rebaseFinalized, "Already finalized");
        rebaseEnabled = false;
        rebaseFinalized = true;
        emit RebaseFinalized(block.timestamp);
    }

}

// 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/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) (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: 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) (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 v5.0.1) (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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

{
  "remappings": [
    "@openzeppelin/=lib/openzeppelin-contracts/",
    "ds-test/=lib/openzeppelin-contracts/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": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": true
}

• No Contract Security Audit Submitted- Submit Audit Here

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0000000000000000000000005351033b055f7c3a018ff21f2a99be2c978d74fe0000000000000000000000000000000000000000000000000000000000003a98

-----Decoded View---------------
Arg [0] : _presale (address): 0x5351033b055f7c3A018ff21f2A99BE2c978d74fE
Arg [1] : _apy (uint256): 15000

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000005351033b055f7c3a018ff21f2a99be2c978d74fe
Arg [1] : 0000000000000000000000000000000000000000000000000000000000003a98