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// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {PauseStorage} from "@animoca/ethereum-contracts/contracts/lifecycle/libraries/PauseStorage.sol";
import {Pause} from "@animoca/ethereum-contracts/contracts/lifecycle/Pause.sol";
import {ContractOwnership} from "@animoca/ethereum-contracts/contracts/access/ContractOwnership.sol";
import {ContractOwnershipStorage} from "@animoca/ethereum-contracts/contracts/access/libraries/ContractOwnershipStorage.sol";

/**
 * @title GMEEStaking
 * @dev Contract for staking $GMEE tokens.
 */
contract GMEEStaking is ContractOwnership, Pause {
    using PauseStorage for PauseStorage.Layout;
    using ContractOwnershipStorage for ContractOwnershipStorage.Layout;

    struct Stake {
        uint256 lockTimestamp;
        uint248 amount;
        uint8 period;
    }

    // Immutable variable representing the GMEE token contract
    IERC20 public immutable gmee;

    // Unstake tax percentage must be an integer value
    // for example to set 3.5% we use 35 (3.5*10) and divide 35 by DECIMAL_FACTOR to get actual value of 3.5% i.e., 0.035
    uint248 public tax;

    // Decimal factor to support decimal percentages
    uint248 public constant DECIMAL_FACTOR = 1000;

    // Address to receive unstake tax
    address public treasury;

    // Mapping to store stake information for each user
    mapping(address => Stake) public stakes;

    // Total amount of $GMEE tokens staked in the contract
    uint248 public totalStaked;

    // Events to log staking and unstaking actions
    event Staked(address indexed account, uint256 amount, uint256 totalAmount, uint256 period);
    event Unstaked(address indexed account, uint256 amount, uint256 taxAmount, uint256 remainingStake);
    event Restaked(address indexed account, uint256 totalAmount, uint256 period);
    event UnstakeTaxTreasuryChanged(address indexed account);
    event UnstakeTaxPercentageUpdated(uint256 newPercentage);

    /**
     * @dev Constructor function for the GMEEStaking contract.
     * @param _gmee The address of the GMEE token contract.
     * @param _treasury The address to send unstake tax to.
     * @param _owner The address to set as the owner of the contract.
     * @param _initialTaxPercentage The initial unstake tax percentage.
     */
    constructor(address _gmee, address _treasury, address _owner, uint248 _initialTaxPercentage) Pause(false) ContractOwnership(_owner) {
        require(_initialTaxPercentage <= DECIMAL_FACTOR, "GMEE:tax% must be 0-100");
        require(_treasury != address(0), "GMEE:treasury != zero address");
        gmee = IERC20(_gmee);
        treasury = _treasury;
        tax = _initialTaxPercentage;
        emit UnstakeTaxTreasuryChanged(_treasury);
        emit UnstakeTaxPercentageUpdated(_initialTaxPercentage);
    }

    /**
     * @dev Stake $GMEE tokens for a specified period.
     * @param amount The amount of $GMEE tokens to stake.
     * @param period The staking period (30, 60, or 90 days).
     */
    function stake(uint248 amount, uint8 period) external {
        PauseStorage.layout().enforceIsNotPaused();
        address account = msg.sender;
        require(period == 30 || period == 60 || period == 90, "GMEE:Invalid period");
        require(amount > 0, "GMEE:Amount must be > 0");

        Stake storage userStake = stakes[account];
        uint248 userStakeAmount = userStake.amount; // Read storage variable once

        uint248 newStakeAmount;
        if (userStakeAmount > 0) {
            require(period == userStake.period, "GMEE:staking period differed");
            newStakeAmount = userStakeAmount + amount;
        } else {
            userStake.period = period;
            newStakeAmount = amount;
        }

        userStake.amount = newStakeAmount; // Update userStake.amount
        userStake.lockTimestamp = block.timestamp;
        gmee.transferFrom(account, address(this), amount);
        totalStaked += amount;
        emit Staked(account, amount, newStakeAmount, period);
    }

    /**
     * @dev Unstake $GMEE tokens.
     * @param amount The amount of $GMEE tokens to unstake.
     */
    function unstake(uint248 amount) external {
        require(amount > 0, "Unstake amount must be > zero");
        address account = msg.sender;
        Stake storage userStake = stakes[account];
        uint248 userStakeAmount = userStake.amount; // Read storage variable once

        require(userStakeAmount >= amount, "Insufficient staked amount");

        uint248 taxAmount = 0;
        if (tax > 0 && block.timestamp < userStake.lockTimestamp + uint256(userStake.period) * 1 days) {
            taxAmount = (amount * tax) / DECIMAL_FACTOR;
        }

        uint248 remainingStake = userStakeAmount - amount;

        userStake.amount = remainingStake;
        totalStaked -= amount;

        if (taxAmount > 0) {
            gmee.transfer(treasury, taxAmount);
        }
        gmee.transfer(account, amount - taxAmount);

        emit Unstaked(account, amount, taxAmount, remainingStake);
    }

    /**
     * @dev Restake $GMEE tokens (restarts staking period).
     */
    function restake() external {
        PauseStorage.layout().enforceIsNotPaused();
        address account = msg.sender;
        Stake storage userStake = stakes[account];
        uint248 userStakeAmount = userStake.amount; // Read storage variable once
        require(userStakeAmount > 0, "Insufficient staked amount");

        // Calculate remaining time in the current lock period
        uint256 elapsedTime = block.timestamp - userStake.lockTimestamp;
        require(elapsedTime >= uint256(userStake.period) * 1 days, "Current lock period not expired");

        userStake.lockTimestamp = block.timestamp;

        emit Restaked(account, userStakeAmount, userStake.period);
    }

    /**
     * @dev Set the address to receive unstake tax.
     * @param _treasury The address to set as the treasury.
     */
    function setUnstakeTaxTreasury(address _treasury) external {
        require(_treasury != address(0), "GMEE:treasury != zero address");
        ContractOwnershipStorage.layout().enforceIsContractOwner(msg.sender);
        treasury = _treasury;
        emit UnstakeTaxTreasuryChanged(_treasury);
    }

    /**
     * @dev Set or update the unstake tax percentage.
     * @param _percentage The new unstake tax percentage.
     */
    function setUnstakeTaxPercentage(uint248 _percentage) external {
        ContractOwnershipStorage.layout().enforceIsContractOwner(msg.sender);
        require(_percentage <= DECIMAL_FACTOR, "GMEE:tax% must be 0-100");
        if (totalStaked > 0) {
            require(_percentage <= tax, "GMEE:New tax% <= current tax%");
        }
        tax = _percentage;
        emit UnstakeTaxPercentageUpdated(_percentage);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import {ContractOwnershipStorage} from "./libraries/ContractOwnershipStorage.sol";
import {ContractOwnershipBase} from "./base/ContractOwnershipBase.sol";
import {InterfaceDetection} from "./../introspection/InterfaceDetection.sol";

/// @title ERC173 Contract Ownership Standard (immutable version).
/// @dev See https://eips.ethereum.org/EIPS/eip-173
/// @dev This contract is to be used via inheritance in an immutable (non-proxied) implementation.
abstract contract ContractOwnership is ContractOwnershipBase, InterfaceDetection {
    using ContractOwnershipStorage for ContractOwnershipStorage.Layout;

    /// @notice Initializes the storage with an initial contract owner.
    /// @notice Marks the following ERC165 interface(s) as supported: ERC173.
    /// @dev Emits an {OwnershipTransferred} if `initialOwner` is not the zero address.
    /// @param initialOwner the initial contract owner.
    constructor(address initialOwner) {
        ContractOwnershipStorage.layout().constructorInit(initialOwner);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import {IERC173} from "./../interfaces/IERC173.sol";
import {ContractOwnershipStorage} from "./../libraries/ContractOwnershipStorage.sol";
import {Context} from "@openzeppelin/contracts/utils/Context.sol";

/// @title ERC173 Contract Ownership Standard (proxiable version).
/// @dev See https://eips.ethereum.org/EIPS/eip-173
/// @dev This contract is to be used via inheritance in a proxied implementation.
/// @dev Note: This contract requires ERC165 (Interface Detection Standard).
abstract contract ContractOwnershipBase is Context, IERC173 {
    using ContractOwnershipStorage for ContractOwnershipStorage.Layout;

    /// @inheritdoc IERC173
    function owner() public view virtual override returns (address) {
        return ContractOwnershipStorage.layout().owner();
    }

    /// @inheritdoc IERC173
    function transferOwnership(address newOwner) public virtual override {
        ContractOwnershipStorage.layout().transferOwnership(_msgSender(), newOwner);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

/// @title ERC-173 Contract Ownership Standard
/// @dev See https://eips.ethereum.org/EIPS/eip-173
/// @dev Note: the ERC-165 identifier for this interface is 0x7f5828d0
interface IERC173 {
    /// @notice Emitted when the contract ownership changes.
    /// @param previousOwner the previous contract owner.
    /// @param newOwner the new contract owner.
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /// @notice Sets the address of the new contract owner.
    /// @dev Reverts if the sender is not the contract owner.
    /// @dev Emits an {OwnershipTransferred} event if `newOwner` is different from the current contract owner.
    /// @param newOwner The address of the new contract owner. Using the zero address means renouncing ownership.
    function transferOwnership(address newOwner) external;

    /// @notice Gets the address of the contract owner.
    /// @return contractOwner The address of the contract owner.
    function owner() external view returns (address contractOwner);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import {IERC173} from "./../interfaces/IERC173.sol";
import {ProxyInitialization} from "./../../proxy/libraries/ProxyInitialization.sol";
import {InterfaceDetectionStorage} from "./../../introspection/libraries/InterfaceDetectionStorage.sol";

library ContractOwnershipStorage {
    using ContractOwnershipStorage for ContractOwnershipStorage.Layout;
    using InterfaceDetectionStorage for InterfaceDetectionStorage.Layout;

    struct Layout {
        address contractOwner;
    }

    bytes32 internal constant LAYOUT_STORAGE_SLOT = bytes32(uint256(keccak256("animoca.core.access.ContractOwnership.storage")) - 1);
    bytes32 internal constant PROXY_INIT_PHASE_SLOT = bytes32(uint256(keccak256("animoca.core.access.ContractOwnership.phase")) - 1);

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

    /// @notice Initializes the storage with an initial contract owner (immutable version).
    /// @notice Marks the following ERC165 interface(s) as supported: ERC173.
    /// @dev Note: This function should be called ONLY in the constructor of an immutable (non-proxied) contract.
    /// @dev Emits an {OwnershipTransferred} if `initialOwner` is not the zero address.
    /// @param initialOwner The initial contract owner.
    function constructorInit(Layout storage s, address initialOwner) internal {
        if (initialOwner != address(0)) {
            s.contractOwner = initialOwner;
            emit OwnershipTransferred(address(0), initialOwner);
        }
        InterfaceDetectionStorage.layout().setSupportedInterface(type(IERC173).interfaceId, true);
    }

    /// @notice Initializes the storage with an initial contract owner (proxied version).
    /// @notice Sets the proxy initialization phase to `1`.
    /// @notice Marks the following ERC165 interface(s) as supported: ERC173.
    /// @dev Note: This function should be called ONLY in the init function of a proxied contract.
    /// @dev Reverts if the proxy initialization phase is set to `1` or above.
    /// @dev Emits an {OwnershipTransferred} if `initialOwner` is not the zero address.
    /// @param initialOwner The initial contract owner.
    function proxyInit(Layout storage s, address initialOwner) internal {
        ProxyInitialization.setPhase(PROXY_INIT_PHASE_SLOT, 1);
        s.constructorInit(initialOwner);
    }

    /// @notice Sets the address of the new contract owner.
    /// @dev Reverts if `sender` is not the contract owner.
    /// @dev Emits an {OwnershipTransferred} event if `newOwner` is different from the current contract owner.
    /// @param newOwner The address of the new contract owner. Using the zero address means renouncing ownership.
    function transferOwnership(Layout storage s, address sender, address newOwner) internal {
        address previousOwner = s.contractOwner;
        require(sender == previousOwner, "Ownership: not the owner");
        if (previousOwner != newOwner) {
            s.contractOwner = newOwner;
            emit OwnershipTransferred(previousOwner, newOwner);
        }
    }

    /// @notice Gets the address of the contract owner.
    /// @return contractOwner The address of the contract owner.
    function owner(Layout storage s) internal view returns (address contractOwner) {
        return s.contractOwner;
    }

    /// @notice Ensures that an account is the contract owner.
    /// @dev Reverts if `account` is not the contract owner.
    /// @param account The account.
    function enforceIsContractOwner(Layout storage s, address account) internal view {
        require(account == s.contractOwner, "Ownership: not the owner");
    }

    function layout() internal pure returns (Layout storage s) {
        bytes32 position = LAYOUT_STORAGE_SLOT;
        assembly {
            s.slot := position
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import {IERC165} from "./interfaces/IERC165.sol";
import {InterfaceDetectionStorage} from "./libraries/InterfaceDetectionStorage.sol";

/// @title ERC165 Interface Detection Standard (immutable or proxiable version).
/// @dev This contract is to be used via inheritance in an immutable (non-proxied) or proxied implementation.
abstract contract InterfaceDetection is IERC165 {
    using InterfaceDetectionStorage for InterfaceDetectionStorage.Layout;

    /// @inheritdoc IERC165
    function supportsInterface(bytes4 interfaceId) external view override returns (bool) {
        return InterfaceDetectionStorage.layout().supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

/// @title ERC165 Interface Detection Standard.
/// @dev See https://eips.ethereum.org/EIPS/eip-165.
/// @dev Note: The ERC-165 identifier for this interface is 0x01ffc9a7.
interface IERC165 {
    /// @notice Returns whether this contract implements a given interface.
    /// @dev Note: This function call must use less than 30 000 gas.
    /// @param interfaceId the interface identifier to test.
    /// @return supported True if the interface is supported, false if `interfaceId` is `0xffffffff` or if the interface is not supported.
    function supportsInterface(bytes4 interfaceId) external view returns (bool supported);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import {IERC165} from "./../interfaces/IERC165.sol";

library InterfaceDetectionStorage {
    struct Layout {
        mapping(bytes4 => bool) supportedInterfaces;
    }

    bytes32 internal constant LAYOUT_STORAGE_SLOT = bytes32(uint256(keccak256("animoca.core.introspection.InterfaceDetection.storage")) - 1);

    bytes4 internal constant ILLEGAL_INTERFACE_ID = 0xffffffff;

    /// @notice Sets or unsets an ERC165 interface.
    /// @dev Reverts if `interfaceId` is `0xffffffff`.
    /// @param interfaceId the interface identifier.
    /// @param supported True to set the interface, false to unset it.
    function setSupportedInterface(Layout storage s, bytes4 interfaceId, bool supported) internal {
        require(interfaceId != ILLEGAL_INTERFACE_ID, "InterfaceDetection: wrong value");
        s.supportedInterfaces[interfaceId] = supported;
    }

    /// @notice Returns whether this contract implements a given interface.
    /// @dev Note: This function call must use less than 30 000 gas.
    /// @param interfaceId The interface identifier to test.
    /// @return supported True if the interface is supported, false if `interfaceId` is `0xffffffff` or if the interface is not supported.
    function supportsInterface(Layout storage s, bytes4 interfaceId) internal view returns (bool supported) {
        if (interfaceId == ILLEGAL_INTERFACE_ID) {
            return false;
        }
        if (interfaceId == type(IERC165).interfaceId) {
            return true;
        }
        return s.supportedInterfaces[interfaceId];
    }

    function layout() internal pure returns (Layout storage s) {
        bytes32 position = LAYOUT_STORAGE_SLOT;
        assembly {
            s.slot := position
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import {PauseStorage} from "./libraries/PauseStorage.sol";
import {PauseBase} from "./base/PauseBase.sol";
import {ContractOwnership} from "../access/ContractOwnership.sol";

/// @title Pausing mechanism (immutable version).
/// @dev This contract is to be used via inheritance in an immutable (non-proxied) implementation.
abstract contract Pause is PauseBase, ContractOwnership {
    using PauseStorage for PauseStorage.Layout;

    /// @notice Initializes the storage with an initial pause state.
    /// @dev Emits a {Paused} event if `isPaused` is true.
    /// @param isPaused The initial pause state.
    constructor(bool isPaused) {
        PauseStorage.layout().constructorInit(isPaused);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import {PauseStorage} from "./../libraries/PauseStorage.sol";
import {ContractOwnershipStorage} from "./../../access/libraries/ContractOwnershipStorage.sol";
import {Context} from "@openzeppelin/contracts/utils/Context.sol";

/// @title Pausing mechanism (proxiable version).
/// @dev This contract is to be used via inheritance in a proxied implementation.
/// @dev Note: This contract requires ERC173 (Contract Ownership standard).
abstract contract PauseBase is Context {
    using PauseStorage for PauseStorage.Layout;
    using ContractOwnershipStorage for ContractOwnershipStorage.Layout;

    /// @notice Emitted when the pause is triggered.
    event Paused();

    /// @notice Emitted when the pause is lifted.
    event Unpaused();

    /// @notice Pauses the contract.
    /// @dev Reverts if the sender is not the contract owner.
    /// @dev Reverts if the contract is paused.
    /// @dev Emits a {Paused} event.
    function pause() external {
        ContractOwnershipStorage.layout().enforceIsContractOwner(_msgSender());
        PauseStorage.layout().pause();
    }

    /// @notice Unpauses the contract.
    /// @dev Reverts if the sender is not the contract owner.
    /// @dev Reverts if the contract is not paused.
    /// @dev Emits an {Unpaused} event.
    function unpause() external {
        ContractOwnershipStorage.layout().enforceIsContractOwner(_msgSender());
        PauseStorage.layout().unpause();
    }

    /// @notice Gets the paused state of the contract.
    /// @return isPaused The paused state of the contract.
    function paused() external view returns (bool) {
        return PauseStorage.layout().paused();
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import {ProxyInitialization} from "./../../proxy/libraries/ProxyInitialization.sol";

library PauseStorage {
    using PauseStorage for PauseStorage.Layout;

    struct Layout {
        bool isPaused;
    }

    bytes32 internal constant LAYOUT_STORAGE_SLOT = bytes32(uint256(keccak256("animoca.core.lifecycle.Pause.storage")) - 1);
    bytes32 internal constant PROXY_INIT_PHASE_SLOT = bytes32(uint256(keccak256("animoca.core.lifecycle.Pause.phase")) - 1);

    event Paused();
    event Unpaused();

    /// @notice Initializes the storage with an initial pause state (immutable version).
    /// @dev Note: This function should be called ONLY in the constructor of an immutable (non-proxied) contract.
    /// @dev Emits a {Paused} event if `isPaused` is true.
    /// @param isPaused The initial pause state.
    function constructorInit(Layout storage s, bool isPaused) internal {
        if (isPaused) {
            s.isPaused = true;
            emit Paused();
        }
    }

    /// @notice Initializes the storage with an initial pause state (proxied version).
    /// @notice Sets the proxy initialization phase to `1`.
    /// @dev Note: This function should be called ONLY in the init function of a proxied contract.
    /// @dev Reverts if the proxy initialization phase is set to `1` or above.
    /// @dev Emits a {Paused} event if `isPaused` is true.
    /// @param isPaused The initial pause state.
    function proxyInit(Layout storage s, bool isPaused) internal {
        ProxyInitialization.setPhase(PROXY_INIT_PHASE_SLOT, 1);
        s.constructorInit(isPaused);
    }

    /// @notice Pauses the contract.
    /// @dev Reverts if the contract is paused.
    /// @dev Emits a {Paused} event.
    function pause(Layout storage s) internal {
        s.enforceIsNotPaused();
        s.isPaused = true;
        emit Paused();
    }

    /// @notice Unpauses the contract.
    /// @dev Reverts if the contract is not paused.
    /// @dev Emits an {Unpaused} event.
    function unpause(Layout storage s) internal {
        s.enforceIsPaused();
        s.isPaused = false;
        emit Unpaused();
    }

    /// @notice Gets the paused state of the contract.
    /// @return isPaused The paused state of the contract.
    function paused(Layout storage s) internal view returns (bool isPaused) {
        return s.isPaused;
    }

    /// @notice Ensures that the contract is paused.
    /// @dev Reverts if the contract is not paused.
    function enforceIsPaused(Layout storage s) internal view {
        require(s.isPaused, "Pause: not paused");
    }

    /// @notice Ensures that the contract is not paused.
    /// @dev Reverts if the contract is paused.
    function enforceIsNotPaused(Layout storage s) internal view {
        require(!s.isPaused, "Pause: paused");
    }

    function layout() internal pure returns (Layout storage s) {
        bytes32 position = LAYOUT_STORAGE_SLOT;
        assembly {
            s.slot := position
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import {StorageSlot} from "@openzeppelin/contracts/utils/StorageSlot.sol";

/// @notice Multiple calls protection for storage-modifying proxy initialization functions.
library ProxyInitialization {
    /// @notice Sets the initialization phase during a storage-modifying proxy initialization function.
    /// @dev Reverts if `phase` has been reached already.
    /// @param storageSlot the storage slot where `phase` is stored.
    /// @param phase the initialization phase.
    function setPhase(bytes32 storageSlot, uint256 phase) internal {
        StorageSlot.Uint256Slot storage currentVersion = StorageSlot.getUint256Slot(storageSlot);
        require(currentVersion.value < phase, "Storage: phase reached");
        currentVersion.value = phase;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @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 amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves `amount` 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 amount) 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 `amount` 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 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` 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 amount
    ) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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 v4.7.0) (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
}

{
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 99999
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_gmee","type":"address"},{"internalType":"address","name":"_treasury","type":"address"},{"internalType":"address","name":"_owner","type":"address"},{"internalType":"uint248","name":"_initialTaxPercentage","type":"uint248"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"totalAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"period","type":"uint256"}],"name":"Restaked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"totalAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"period","type":"uint256"}],"name":"Staked","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpaused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newPercentage","type":"uint256"}],"name":"UnstakeTaxPercentageUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"}],"name":"UnstakeTaxTreasuryChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"taxAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"remainingStake","type":"uint256"}],"name":"Unstaked","type":"event"},{"inputs":[],"name":"DECIMAL_FACTOR","outputs":[{"internalType":"uint248","name":"","type":"uint248"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"gmee","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"restake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint248","name":"_percentage","type":"uint248"}],"name":"setUnstakeTaxPercentage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_treasury","type":"address"}],"name":"setUnstakeTaxTreasury","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint248","name":"amount","type":"uint248"},{"internalType":"uint8","name":"period","type":"uint8"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"stakes","outputs":[{"internalType":"uint256","name":"lockTimestamp","type":"uint256"},{"internalType":"uint248","name":"amount","type":"uint248"},{"internalType":"uint8","name":"period","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tax","outputs":[{"internalType":"uint248","name":"","type":"uint248"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalStaked","outputs":[{"internalType":"uint248","name":"","type":"uint248"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint248","name":"amount","type":"uint248"}],"name":"unstake","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000d9016a907dc0ecfa3ca425ab20b6b785b42f2373000000000000000000000000b106966d026fa099f32a57f762a38f17c6c9698e00000000000000000000000027366d0f7dce8b7e90344fce0cb7188666fdf6400000000000000000000000000000000000000000000000000000000000000032

-----Decoded View---------------
Arg [0] : _gmee (address): 0xD9016A907Dc0ECfA3ca425ab20B6b785B42F2373
Arg [1] : _treasury (address): 0xB106966d026fA099F32a57F762a38f17c6C9698e
Arg [2] : _owner (address): 0x27366D0f7DCe8b7E90344FCE0CB7188666FDF640
Arg [3] : _initialTaxPercentage (uint248): 50

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000d9016a907dc0ecfa3ca425ab20b6b785b42f2373
Arg [1] : 000000000000000000000000b106966d026fa099f32a57f762a38f17c6c9698e
Arg [2] : 00000000000000000000000027366d0f7dce8b7e90344fce0cb7188666fdf640
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000032