// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @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://diligence.consensys.net/posts/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/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @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, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * 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.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @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`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) 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(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

import {IRegistry} from "./interfaces/IRegistry.sol";
import {IEdge} from "./interfaces/IEdge.sol";
import {TransferReason} from "./libraries/TransferReason.sol";
import {
    SafeERC20,
    IERC20
} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {
    ReentrancyGuard
} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {SafeCast} from "@openzeppelin/contracts/utils/math/SafeCast.sol";

contract AethirEdge is IEdge, ReentrancyGuard {
    using SafeERC20 for IERC20;

    struct UserData {
        uint64 nonce;
        uint64 lastUpdateBlock;
    }

    IRegistry private immutable _registry;
    mapping(address account => UserData data) private _users;

    modifier usualCheck(VerifiableData calldata vdata) {
        _beforeCheck(vdata);
        _;
        _afterCheck(vdata);
    }

    constructor(IRegistry registry) {
        _registry = registry;
    }

    function version() external view override returns (uint64) {
        return _registry.getVersion();
    }

    function currentEpoch()
        external
        view
        override
        returns (uint64 epoch, uint64 startTs, uint64 endTs)
    {
        uint256 start = _registry.getConfigurator().getDeployTs();
        uint256 dur = _registry.getConfigurator().getEpochDuration();
        epoch = SafeCast.toUint64((block.timestamp - start) / dur);
        startTs = SafeCast.toUint64((dur * epoch) + start);
        endTs = SafeCast.toUint64(dur + startTs);
    }

    function getUserData(
        address owner
    ) external view returns (UserData memory) {
        return _users[owner];
    }

    function nonces(address owner) external view returns (uint64) {
        return _users[owner].nonce;
    }

    function switchContainers(
        ContainerList calldata container,
        VerifiableData calldata vdata
    ) external override nonReentrant usualCheck(vdata) returns (bool) {
        _registry.getContainerHandler().handleSwitch(
            msg.sender,
            container,
            vdata
        );
        emit Switch(msg.sender, vdata.nonce, container);
        return true;
    }

    function stakeContainers(
        ContainerList calldata containers,
        VerifiableData calldata vdata
    ) external override nonReentrant usualCheck(vdata) returns (bool) {
        uint256 amount = _registry.getContainerHandler().handleStake(
            msg.sender,
            containers,
            vdata
        );
        _registry.getAethirToken().safeTransferFrom(
            msg.sender,
            address(this),
            amount
        );
        emit Stake(msg.sender, vdata.nonce, containers);
        return true;
    }

    function unstakeContainers(
        ContainerList calldata containers,
        VerifiableData calldata vdata
    ) external override nonReentrant usualCheck(vdata) returns (bool) {
        (uint256 amount, bool skipVesting) = _registry
            .getContainerHandler()
            .handleUnstake(msg.sender, containers, vdata);

        if (skipVesting) {
            _sendToken(msg.sender, amount, TransferReason.UNSTAKE);
        } else {
            uint256[] memory pendings = new uint256[](1);
            pendings[0] = amount;
            _registry.getAethirToken().safeIncreaseAllowance(
                address(_registry.getVestingController()),
                amount
            );
            _registry.getVestingController().newVesting(
                msg.sender,
                _registry.getConfigurator().getRewardLockedTime(),
                pendings
            );
        }
        emit Unstake(msg.sender, vdata.nonce, containers);
        return true;
    }

    function claimReward(
        ContainerList calldata containers,
        VerifiableData calldata vdata
    ) external override nonReentrant usualCheck(vdata) returns (bool) {
        uint256 amount = _registry.getRewardHandler().handleClaim(
            msg.sender,
            containers,
            vdata
        );
        _sendToken(msg.sender, amount, TransferReason.CLAIM_REWARD);
        emit ClaimReward(msg.sender, vdata.nonce, containers);
        return true;
    }

    function claimServiceFee(
        ContainerList calldata containers,
        VerifiableData calldata vdata
    ) external override nonReentrant usualCheck(vdata) returns (bool) {
        uint256 earned = _registry.getServiceFeeHandler().handleClaim(
            msg.sender,
            containers,
            vdata
        );
        _sendToken(msg.sender, earned, TransferReason.CLAIM_FEE);
        emit ClaimServiceFee(msg.sender, vdata.nonce, containers);
        return true;
    }

    function depositServiceFee(
        uint256 amount,
        VerifiableData calldata vdata
    ) external override nonReentrant usualCheck(vdata) returns (bool) {
        uint256 depositable = _registry.getServiceFeeHandler().handleDeposit(
            msg.sender,
            amount,
            vdata
        );
        require(depositable >= amount, "Deposit more than available");
        _registry.getAethirToken().safeTransferFrom(
            msg.sender,
            address(this),
            amount
        );
        emit DepositServiceFee(msg.sender, vdata.nonce, amount);
        return true;
    }

    function withdrawServiceFee(
        uint256 amount,
        VerifiableData calldata vdata
    ) external override nonReentrant usualCheck(vdata) returns (bool) {
        uint256 withdrawable = _registry.getServiceFeeHandler().handleWithdraw(
            msg.sender,
            amount,
            vdata
        );
        require(withdrawable >= amount, "Withdraw more than available");
        _sendToken(msg.sender, amount, TransferReason.WITHDRAW_FEE);
        emit WithdrawServiceFee(msg.sender, vdata.nonce, amount);
        return true;
    }

    function forceUnstake(
        address[] calldata providers,
        uint32[] calldata indexes,
        VerifiableData calldata vdata
    ) external override nonReentrant usualCheck(vdata) returns (bool) {
        _registry.getContainerHandler().handleForceUnstake(
            msg.sender,
            providers,
            indexes,
            vdata
        );
        emit ForceUnstake(msg.sender, vdata.nonce, providers, indexes);
        return true;
    }

    function adminWithdraw(
        address to,
        uint256 amount,
        string calldata message
    ) external returns (bool) {
        _registry.getACLManager().requireDefaultAdmin(msg.sender);
        _sendToken(to, amount, TransferReason.ADMIN_WITHDRAW);
        emit AdminWithdraw(to, amount, message);
        return true;
    }

    function _sendToken(address to, uint256 amount, uint8 reason) internal {
        if (amount <= 0) return;
        _registry.getRiskManager().tryTransfer(to, amount, reason);
        _registry.getAethirToken().safeTransfer(to, amount);
    }

    function _beforeCheck(VerifiableData calldata vdata) internal view {
        require(vdata.version == _registry.getVersion(), "InvalidVersion");
        // slither-disable-next-line timestamp
        require(vdata.deadline >= block.timestamp, "DataExpired");
        require(vdata.nonce > _users[msg.sender].nonce, "NonceTooLow");
        require(
            vdata.lastUpdateBlock >= _users[msg.sender].lastUpdateBlock,
            "DataTooOld"
        );
    }

    function _afterCheck(VerifiableData calldata vdata) internal {
        _users[msg.sender].nonce = vdata.nonce;
        _users[msg.sender].lastUpdateBlock = uint64(block.number);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

/**
 * @title IACLManager
 * @notice Defines the basic interface for the ACL Manager
 */
interface IACLManager {
    /// @notice thrown when tx has not been completed because it lacks valid authentication credentials
    error Unauthorized(string message);

    /// @notice revert if the address is not DefaultAdmin
    /// @param account: the address to check
    function requireDefaultAdmin(address account) external view;

    /// @notice true if the address is Core Module, false otherwise
    /// @param account: the address to check
    /// @return true if the given address is Core Module, false otherwise
    function isCore(address account) external view returns (bool);

    /// @notice revert if the address is not Core Module
    /// @param account: the address to check
    function requireCore(address account) external view;

    /// @notice true if the address is Originator, false otherwise
    /// @param account: the address to check
    /// @return true if the given address is Originator, false otherwise
    function isOriginator(address account) external view returns (bool);

    /// @notice revert if the address is not Originator
    /// @param account: the address to check
    function requireOriginator(address account) external view;

    /// @notice true if the address is Operator, false otherwise
    /// @param account: the address to check
    /// @return true if the given address is Operator, false otherwise
    function isOperator(address account) external view returns (bool);

    /// @notice revert if the address is not Operator
    /// @param account: the address to check
    function requireOperator(address account) external view;

    /// @notice true if the address is Migrator, false otherwise
    /// @param account: the address to check
    /// @return true if the given address is Migrator, false otherwise
    function isMigrator(address account) external view returns (bool);

    /// @notice revert if the address is not Migrator
    /// @param account: the address to check
    function requireMigrator(address account) external view;

    /// @notice true if the address is Validator, false otherwise
    /// @param account: the address to check
    /// @return true if the given address is Validator, false otherwise
    function isValidator(address account) external view returns (bool);

    /// @notice revert if the address is not Validator
    /// @param account: the address to check
    function requireValidator(address account) external view;

    /// @notice true if the address is Approver, false otherwise
    /// @param account: the address to check
    /// @return true if the given address is Approver, false otherwise
    function isApprover(address account) external view returns (bool);

    /// @notice revert if the address is not Approver
    /// @param account: the address to check
    function requireApprover(address account) external view;

    /// @notice true if the address is EmergencyAdmin, false otherwise
    /// @param account: the address to check
    /// @return true if the given address is EmergencyAdmin, false otherwise
    function isEmergencyAdmin(address account) external view returns (bool);

    /// @notice revert if the address is not EmergencyAdmin
    /// @param account: the address to check
    function requireEmergencyAdmin(address account) external view;

    /// @notice true if the address is RiskAdmin, false otherwise
    /// @param account: the address to check
    /// @return true if the given address is RiskAdmin, false otherwise
    function isRiskAdmin(address account) external view returns (bool);

    /// @notice revert if the address is not RiskAdmin
    /// @param account: the address to check
    function requireRiskAdmin(address account) external view;

    /// @notice get number of required validator signatures for verifiable data
    function getRequiredValidatorSignatures() external view returns (uint8);

    /// @notice set number of required validator signatures for verifiable data
    function setRequiredValidatorSignatures(uint8 value) external;

    /// @notice get number of required approver signatures for verifiable data
    function getRequiredApproverSignatures() external view returns (uint8);

    /// @notice set number of required approver signatures for verifiable data
    function setRequiredApproverSignatures(uint8 value) external;

    function checkValidatorSignatures(
        bytes32 dataHash,
        bytes calldata signatures
    ) external view;

    function checkApproverSignatures(
        bytes32 dataHash,
        bytes calldata signatures
    ) external view;
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

interface IConfigurator {
    /// @notice service fee data
    /// @param retailUpside: retail service fee upside
    /// @param retailDownside: retail service fee downside
    /// @param wholesaleUpside: wholesale service fee upside
    /// @param wholesaleDownside: wholesale service fee downside
    struct ServiceFee {
        uint256 retailUpside;
        uint256 retailDownside;
        uint256 wholesaleUpside;
        uint256 wholesaleDownside;
    }

    /// @notice thrown when value is not valid
    error InvalidValue(string message);

    /// @notice returns first epoch start time (in UNIX timestamp)
    function getDeployTs() external view returns (uint256);

    /// @notice returns epoch duration (in seconds)
    function getEpochDuration() external view returns (uint256);

    /// @notice returns current system epoch
    function getEpoch() external view returns (uint256);

    /// @notice returns token amount released current year
    function getYearlyEmission() external view returns (uint256);

    /// @notice returns token amount released yearly
    function getYearlyEmissionTable()
        external
        view
        returns (uint256[] memory values);

    /// @notice configures yearly emission rate
    /// @param values: yearly emission rate
    function initYearlyEmissionTable(uint256[] calldata values) external;

    /// @notice returns yearly emission rate at wstakenum
    /// @param wstakenum: wstakenum
    function getYearlyEmissionRate(
        uint256 wstakenum
    ) external view returns (uint256 value, uint8 index);

    /// @notice returns yearly emission rate at index
    /// @param index: index
    function getYearlyEmissionRateAtIndex(
        uint8 index
    ) external view returns (uint256 value);

    /// @notice returns token amount released yearly
    function getYearlyEmissionRateTable()
        external
        view
        returns (uint256[] memory values);

    /// @notice configures token amount released rate yearly
    /// @param values: yearly emission amount
    function initYearlyEmissionRateTable(uint256[] calldata values) external;

    /// @notice returns weighted number of containers staked table
    function getWStakeNumTable()
        external
        view
        returns (uint256[] memory values);

    /// @notice configures weighted number of containers staked table
    /// @param values: WStakeNum list
    function initWStakeNumTable(uint256[] calldata values) external;

    /// @notice returns stake base at wstakenum
    /// @param wstakenum: wstakenum
    function getStakeBase(
        uint256 wstakenum
    ) external view returns (uint256 value, uint8 index);

    /// @notice returns stake base at index
    /// @param index: index
    function getStakeBaseAtIndex(
        uint8 index
    ) external view returns (uint256 value);

    /// @notice returns stake base table
    function getStakeBaseTable()
        external
        view
        returns (uint256[] memory values);

    /// @notice configures stake base table
    /// @param values: stake base list
    function initStakeBaseTable(uint256[] calldata values) external;

    /// @notice returns k-value for container ith configuration
    function getContainerKValue(
        uint16 index
    ) external view returns (uint256 value);

    /// @notice configures k-values for each container configuration
    /// @param indexes: the k-indexes
    /// @param values: the new k-values
    function setContainerKValue(
        uint16[] calldata indexes,
        uint256[] calldata values
    ) external;

    /// @notice returns the number of decimals used to get its user representation.
    /// For example, if `decimals` equals `2`, a kValue of `505` should
    /// be displayed to a user as `5.05` (`505 / 10 ** 2`)
    function getKValueDecimals() external view returns (uint8);

    /// @notice returns reward locked time before vesting
    function getRewardLockedTime() external view returns (uint64);

    /// @notice configures reward locked time before vesting
    /// @param value: new locked time (in days)
    function setRewardLockedTime(uint64 value) external;

    /// @notice returns vesting period
    function getVestingPeriod() external view returns (uint64);

    /// @notice configures vesting period
    /// @param value: new vesting period (in days)
    function setVestingPeriod(uint64 value) external;

    /// @notice returns service fee for container ith configuration
    function getServiceFees(
        uint16 index
    ) external view returns (ServiceFee memory);

    /// @notice configures wholesale service fee for each container configuration
    /// @param indexes: the k-indexes
    /// @param values: the new service fee
    function setServiceFees(
        uint16[] calldata indexes,
        ServiceFee[] calldata values
    ) external;

    /// @notice returns wholesale maintenance time
    function getWholesaleMaintenanceTime() external view returns (uint256);

    /// @notice configures wholesale maintenance time
    /// @param value: new wholesale maintenance time
    function setWholesaleMaintenanceTime(uint256 value) external;

    /// @notice returns slash grace period
    function getGracePeriod() external view returns (uint256);

    /// @notice configures slash grace period
    /// @param value: new slash grace period
    function setGracePeriod(uint256 value) external;
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

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

interface IContainerHandler {
    function handleSwitch(
        address provider,
        IEdge.ContainerList calldata containers,
        IEdge.VerifiableData calldata vdata
    ) external;

    function handleStake(
        address provider,
        IEdge.ContainerList calldata containers,
        IEdge.VerifiableData calldata vdata
    ) external returns (uint256 amount);

    function handleUnstake(
        address provider,
        IEdge.ContainerList calldata containers,
        IEdge.VerifiableData calldata vdata
    ) external returns (uint256 amount, bool skipVesting);

    function handleForceUnstake(
        address operator,
        address[] calldata providers,
        uint32[] calldata indexes,
        IEdge.VerifiableData calldata vdata
    ) external;
}

// 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
pragma solidity =0.8.18;

/**
 * @dev Interface of Aethir Edge Contract
 */
interface IEdge {
    /// @notice verifiable off-chain data
    /// @param nonce: off-chain request id
    /// @param deadline: deadline timestamp as seconds since Unix epoch
    /// @param lastUpdateBlock: last indexed event blocknumber
    /// @param version: system version
    /// @param payloads: data package (format according to system version)
    /// @param proof: data proof (Validator Signature or Merkle Proof)
    struct VerifiableData {
        uint64 nonce;
        uint64 deadline;
        uint64 lastUpdateBlock;
        uint64 version;
        bytes[] payloads;
        bytes[] proof;
    }

    /// @notice list of containers
    /// @param offset: index of the first container in the bitset, must be multiples of 256
    /// @param bitset: bit[n] = 1 mean enable container at index `offset`+`n`
    struct ContainerList {
        uint16 count;
        uint32 offset;
        bytes bitset;
    }

    /// @notice emitted after a successful switch containers request
    event Switch(
        address indexed provider,
        uint64 nonce,
        ContainerList containers
    );

    /// @notice emitted after a successful stake containers request
    event Stake(
        address indexed provider,
        uint64 nonce,
        ContainerList containers
    );

    /// @notice emitted after a successful unstake containers request
    event Unstake(
        address indexed provider,
        uint64 nonce,
        ContainerList containers
    );

    /// @notice emitted after a successful claim reward request
    event ClaimReward(
        address indexed provider,
        uint64 nonce,
        ContainerList containers
    );

    /// @notice emitted after a successful claim service fee request
    event ClaimServiceFee(
        address indexed provider,
        uint64 nonce,
        ContainerList containers
    );

    /// @notice emitted after a successful deposit service fee request
    event DepositServiceFee(
        address indexed developer,
        uint64 nonce,
        uint256 amount
    );

    /// @notice emitted after a successful withdraw service fee request
    event WithdrawServiceFee(
        address indexed developer,
        uint64 nonce,
        uint256 amount
    );

    /// @notice emitted after a successful admin withdraw request
    event AdminWithdraw(address indexed to, uint256 amount, string message);

    /// @notice emitted after system update version
    event VersionUpdate(uint64 indexed oldVersion, uint64 indexed newVersion);

    /// @notice emitted after a successful force unstake containers request
    event ForceUnstake(
        address indexed operator,
        uint64 nonce,
        address[] providers,
        uint32[] indexes
    );

    /// @notice thrown when data version does not match with system version
    error InvalidVersion();

    /// @notice thrown when data deadline exceeded block timestamp
    error DataExpired();

    /// @notice thrown when data nonce is lower than the last id
    error NonceTooLow();

    /// @notice thrown when data payload is invalid
    error InvalidPayload();

    /// @notice thrown when parameter is invalid
    error InvalidParameter(string message);

    /// @notice thrown when data merkle proof or signature is invalid
    error InvalidProof();

    /// @notice thrown when on-chain and off-chain data are out-of-sync
    error DataTooOld();

    /// @notice thrown when there is abnormal data
    error DataConflict(string message);

    /// @notice Returns the current system version
    function version() external view returns (uint64);

    /// @notice Returns the current system epoch
    function currentEpoch()
        external
        view
        returns (uint64 epoch, uint64 startTs, uint64 endTs);

    /// @notice Returns the current nonce for `owner`
    /// A higher nonce must be included whenever generate a signature
    /// Every successful call update `owner`'s nonce to the new one
    /// This prevents a signature from being used multiple times.
    function nonces(address owner) external view returns (uint64);

    /// @notice Container Provider switch multiple containers
    /// @param containers: list of containers to switch
    /// @param vdata: additional data for switching containers
    function switchContainers(
        ContainerList calldata containers,
        VerifiableData calldata vdata
    ) external returns (bool);

    /// @notice Container Provider stake multiple containers
    /// @dev Caller must have allowance for this contract of at least stake amount
    /// @param containers: list of containers to stake
    /// @param vdata: additional data for calculating stake amount
    function stakeContainers(
        ContainerList calldata containers,
        VerifiableData calldata vdata
    ) external returns (bool);

    /// @notice Container Provider unstake and claim reward for multiple containers
    /// @param containers: list of containers to unstake
    /// @param vdata: additional data for calculating unstake amount, reward and service fee
    function unstakeContainers(
        ContainerList calldata containers,
        VerifiableData calldata vdata
    ) external returns (bool);

    /// @notice Container Provider claim reward for multiple containers
    /// @dev Reward will be sent to Vesting Controller and released following schedule
    /// @param containers: list of container to claim reward
    /// @param vdata: additional data for calculating reward amount
    function claimReward(
        ContainerList calldata containers,
        VerifiableData calldata vdata
    ) external returns (bool);

    /// @notice Container Provider claim service fee for multiple containers
    /// @param containers: list of container to claim service fee
    /// @param vdata: additional data for calculating service fee amount
    function claimServiceFee(
        ContainerList calldata containers,
        VerifiableData calldata vdata
    ) external returns (bool);

    /// @notice Game Developer deposit service fee
    /// @dev Caller must have allowance for this contract of at least deposit amount
    /// @param amount: amount of token game developer want to deposit
    /// @param vdata: additional data for calculating depositable service fee
    function depositServiceFee(
        uint256 amount,
        VerifiableData calldata vdata
    ) external returns (bool);

    /// @notice Game Developer withdraw service fee
    /// @param amount: amount of token game developer want to withdraw
    /// @param vdata: additional data for calculating withdrawable service fee
    function withdrawServiceFee(
        uint256 amount,
        VerifiableData calldata vdata
    ) external returns (bool);

    /// @notice Operator force unstake multiple containers
    /// @param providers: address of providers
    /// @param indexes: unstaked container index
    /// @param vdata: additional data for calculating remain stake number
    function forceUnstake(
        address[] calldata providers,
        uint32[] calldata indexes,
        VerifiableData calldata vdata
    ) external returns (bool);

    /// @notice Admin withdraw fund
    /// @param to: recipient address
    /// @param amount: amount of token want to withdraw
    /// @param message: withdraw message
    function adminWithdraw(
        address to,
        uint256 amount,
        string calldata message
    ) external returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

import {IACLManager} from "./IACLManager.sol";
import {IRewardHandler} from "./IRewardHandler.sol";
import {IServiceFeeHandler} from "./IServiceFeeHandler.sol";
import {IContainerHandler} from "./IContainerHandler.sol";
import {IVestingController} from "./IVestingController.sol";
import {IRiskManager} from "./IRiskManager.sol";
import {IConfigurator} from "./IConfigurator.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IRegistry {
    /// @notice thrown when value is not valid
    error CannotBeZero();

    /// @notice returns the current system version
    function getVersion() external view returns (uint64);

    /// @notice registers new system version
    /// @param value: new version
    function setVersion(uint64 value) external;

    /// @notice returns the contract address of the Aethir Token
    /// @return The address of the Aethir Token
    function getAethirToken() external view returns (IERC20);

    /// @notice returns the contract address of the ACL Manager
    /// @return The address of the ACL Manager
    function getACLManager() external view returns (IACLManager);

    /// @notice returns the contract address of the Reward Handler
    /// @return The address of the Reward Handler
    function getRewardHandler() external view returns (IRewardHandler);

    /// @notice registers the contract address of the Reward Handler
    /// @param value: address of new Reward Handler
    function setRewardHandler(IRewardHandler value) external;

    /// @notice returns the contract address of the Service Fee Handler
    /// @return The address of the Service Fee Handler
    function getServiceFeeHandler() external view returns (IServiceFeeHandler);

    /// @notice registers the contract address of the Service Fee Handler
    /// @param value: address of new Service Fee Handler
    function setServiceFeeHandler(IServiceFeeHandler value) external;

    /// @notice returns the contract address of the Stake Handler
    /// @return The address of the Stake Handler
    function getContainerHandler() external view returns (IContainerHandler);

    /// @notice registers the contract address of the Stake Handler
    /// @param value: address of new Stake Handler
    function setContainerHandler(IContainerHandler value) external;

    /// @notice returns the contract address of the Vesting Controller
    /// @return The address of the Vesting Controller
    function getVestingController() external view returns (IVestingController);

    /// @notice registers the contract address of the Vesting Controller
    /// @param value: address of new Vesting Controller
    function setVestingController(IVestingController value) external;

    /// @notice returns the contract address of the Risk Manager
    /// @return The address of the Risk Manager
    function getRiskManager() external view returns (IRiskManager);

    /// @notice registers the contract address of the Risk Manager
    /// @param value: address of new Risk Manager
    function setRiskManager(IRiskManager value) external;

    /// @notice returns the contract address of the Configurator
    /// @return The address of the Configurator
    function getConfigurator() external view returns (IConfigurator);

    /// @notice registers the contract address of the Configurator
    /// @param value: address of new Configurator
    function setConfigurator(IConfigurator value) external;
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

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

interface IRewardHandler {
    function handleClaim(
        address provider,
        IEdge.ContainerList calldata containers,
        IEdge.VerifiableData calldata data
    ) external returns (uint256 reward);
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

/**
 * @dev Interface of Risk Manager
 */
interface IRiskManager {
    /// @notice thrown when transfer more than risk limit
    error InvalidTransfer();

    /// @notice Throws if the transfering is on suspicion of illegal activity
    /// @param to: address of receiver
    /// @param amount: amount of token want to transfer
    /// @param reason: tranfering reason
    function tryTransfer(address to, uint256 amount, uint8 reason) external;
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

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

interface IServiceFeeHandler {
    function handleClaim(
        address provider,
        IEdge.ContainerList calldata containers,
        IEdge.VerifiableData calldata data
    ) external returns (uint256 earned);

    function handleDeposit(
        address developer,
        uint256 amount,
        IEdge.VerifiableData calldata data
    ) external returns (uint256 depositable);

    function handleWithdraw(
        address developer,
        uint256 amount,
        IEdge.VerifiableData calldata data
    ) external returns (uint256 withdrawable);
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

/**
 * @dev Interface of Vesting Controller
 */
interface IVestingController {
    /// @notice emitted after a successful release request
    event TokenReleased(address indexed beneficiary, uint256 amount);

    /// @notice emitted after a successful new vesting request
    event NewVestingSchedule(
        address indexed beneficiary,
        uint64 lockedDays,
        uint256[] amounts
    );

    /// @notice Amount of token already released
    function released(address beneficiary) external view returns (uint256);

    /// @notice Getter for the amount of releasable tokens
    function releasable(address beneficiary) external view returns (uint256);

    /// @notice Release the tokens that have already vested
    function release(address beneficiary) external;

    /// @notice Calculates the amount of tokens that has already vested
    function vestedAmount(
        address beneficiary,
        uint64 timestamp
    ) external view returns (uint256);

    /// @notice Start new vesting for the beneficiary
    function newVesting(
        address beneficiary,
        uint64 lockedDays,
        uint256[] memory amounts
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @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;

    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
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../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;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @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, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity =0.8.18;

library TransferReason {
    uint8 public constant UNSTAKE = 0x01;
    uint8 public constant CLAIM_REWARD = 0x02;
    uint8 public constant CLAIM_FEE = 0x03;
    uint8 public constant WITHDRAW_FEE = 0x04;
    uint8 public constant ADMIN_WITHDRAW = 0x05;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @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.
 */
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].
     */
    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);
}

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    "contracts/AethirEdge.sol": "AethirEdge"
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  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "none",
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