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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {SafeERC20, IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {UUPSUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";

import {PRECISION} from "@solarity/solidity-lib/utils/Globals.sol";

import {LinearDistributionIntervalDecrease} from "./libs/LinearDistributionIntervalDecrease.sol";

import {L1Sender} from "./L1Sender.sol";
import {IDistribution} from "./interfaces/IDistribution.sol";

contract Distribution is IDistribution, OwnableUpgradeable, UUPSUpgradeable {
    using SafeERC20 for IERC20;

    bool public isNotUpgradeable;

    address public depositToken;
    address public l1Sender;

    // Pool storage
    Pool[] public pools;
    mapping(uint256 => PoolData) public poolsData;

    // User storage
    mapping(address => mapping(uint256 => UserData)) public usersData;

    // Total deposited storage
    uint256 public totalDepositedInPublicPools;

    /**********************************************************************************************/
    /*** Modifiers                                                                              ***/
    /**********************************************************************************************/
    modifier poolExists(uint256 poolId_) {
        require(_poolExists(poolId_), "DS: pool doesn't exist");
        _;
    }

    modifier poolPublic(uint256 poolId_) {
        require(pools[poolId_].isPublic, "DS: pool isn't public");
        _;
    }

    /**********************************************************************************************/
    /*** Init                                                                                   ***/
    /**********************************************************************************************/

    constructor() {
        _disableInitializers();
    }

    function Distribution_init(
        address depositToken_,
        address l1Sender_,
        Pool[] calldata poolsInfo_
    ) external initializer {
        __Ownable_init();
        __UUPSUpgradeable_init();

        for (uint256 i; i < poolsInfo_.length; ++i) {
            createPool(poolsInfo_[i]);
        }

        depositToken = depositToken_;
        l1Sender = l1Sender_;
    }

    /**********************************************************************************************/
    /*** Pool managment and data retrieval                                                      ***/
    /**********************************************************************************************/
    function createPool(Pool calldata pool_) public onlyOwner {
        require(pool_.payoutStart > block.timestamp, "DS: invalid payout start value");

        _validatePool(pool_);
        pools.push(pool_);

        emit PoolCreated(pools.length - 1, pool_);
    }

    function editPool(uint256 poolId_, Pool calldata pool_) external onlyOwner poolExists(poolId_) {
        _validatePool(pool_);
        require(pools[poolId_].isPublic == pool_.isPublic, "DS: invalid pool type");

        PoolData storage poolData = poolsData[poolId_];
        uint256 currentPoolRate_ = _getCurrentPoolRate(poolId_);

        // Update pool data
        poolData.rate = currentPoolRate_;
        poolData.lastUpdate = uint128(block.timestamp);

        pools[poolId_] = pool_;

        emit PoolEdited(poolId_, pool_);
    }

    function getPeriodReward(uint256 poolId_, uint128 startTime_, uint128 endTime_) public view returns (uint256) {
        if (!_poolExists(poolId_)) {
            return 0;
        }

        Pool storage pool = pools[poolId_];

        return
            LinearDistributionIntervalDecrease.getPeriodReward(
                pool.initialReward,
                pool.rewardDecrease,
                pool.payoutStart,
                pool.decreaseInterval,
                startTime_,
                endTime_
            );
    }

    function _validatePool(Pool calldata pool_) private pure {
        require(pool_.decreaseInterval > 0, "DS: invalid decrease interval");
    }

    /**********************************************************************************************/
    /*** User management in private pools                                                       ***/
    /**********************************************************************************************/
    function manageUsersInPrivatePool(
        uint256 poolId_,
        address[] calldata users_,
        uint256[] calldata amounts_
    ) external onlyOwner poolExists(poolId_) {
        require(!pools[poolId_].isPublic, "DS: pool is public");
        require(users_.length == amounts_.length, "DS: invalid length");

        uint256 currentPoolRate_ = _getCurrentPoolRate(poolId_);

        for (uint256 i; i < users_.length; ++i) {
            address user_ = users_[i];
            uint256 amount_ = amounts_[i];

            uint256 deposited_ = usersData[user_][poolId_].deposited;

            if (deposited_ < amount_) {
                _stake(user_, poolId_, amount_ - deposited_, currentPoolRate_);
            } else if (deposited_ > amount_) {
                _withdraw(user_, poolId_, deposited_ - amount_, currentPoolRate_);
            }
        }
    }

    /**********************************************************************************************/
    /*** Stake, claim, withdraw                                                                 ***/
    /**********************************************************************************************/
    function stake(uint256 poolId_, uint256 amount_) external poolExists(poolId_) poolPublic(poolId_) {
        _stake(_msgSender(), poolId_, amount_, _getCurrentPoolRate(poolId_));
    }

    function claim(uint256 poolId_, address receiver_) external payable poolExists(poolId_) {
        address user_ = _msgSender();

        Pool storage pool = pools[poolId_];
        PoolData storage poolData = poolsData[poolId_];
        UserData storage userData = usersData[user_][poolId_];

        require(block.timestamp > pool.payoutStart + pool.claimLockPeriod, "DS: pool claim is locked");

        uint256 currentPoolRate_ = _getCurrentPoolRate(poolId_);
        uint256 pendingRewards_ = _getCurrentUserReward(currentPoolRate_, userData);
        require(pendingRewards_ > 0, "DS: nothing to claim");

        // Update pool data
        poolData.lastUpdate = uint128(block.timestamp);
        poolData.rate = currentPoolRate_;

        // Update user data
        userData.rate = currentPoolRate_;
        userData.pendingRewards = 0;

        // Transfer rewards
        L1Sender(l1Sender).sendMintMessage{value: msg.value}(receiver_, pendingRewards_, user_);

        emit UserClaimed(poolId_, user_, receiver_, pendingRewards_);
    }

    function withdraw(uint256 poolId_, uint256 amount_) external poolExists(poolId_) poolPublic(poolId_) {
        _withdraw(_msgSender(), poolId_, amount_, _getCurrentPoolRate(poolId_));
    }

    function getCurrentUserReward(uint256 poolId_, address user_) external view returns (uint256) {
        if (!_poolExists(poolId_)) {
            return 0;
        }

        UserData storage userData = usersData[user_][poolId_];
        uint256 currentPoolRate_ = _getCurrentPoolRate(poolId_);

        return _getCurrentUserReward(currentPoolRate_, userData);
    }

    function _stake(address user_, uint256 poolId_, uint256 amount_, uint256 currentPoolRate_) private {
        require(amount_ > 0, "DS: nothing to stake");

        Pool storage pool = pools[poolId_];
        PoolData storage poolData = poolsData[poolId_];
        UserData storage userData = usersData[user_][poolId_];

        if (pool.isPublic) {
            // https://docs.lido.fi/guides/lido-tokens-integration-guide/#steth-internals-share-mechanics
            uint256 balanceBefore_ = IERC20(depositToken).balanceOf(address(this));
            IERC20(depositToken).safeTransferFrom(_msgSender(), address(this), amount_);
            uint256 balanceAfter_ = IERC20(depositToken).balanceOf(address(this));

            amount_ = balanceAfter_ - balanceBefore_;

            require(userData.deposited + amount_ >= pool.minimalStake, "DS: amount too low");

            totalDepositedInPublicPools += amount_;
        }

        userData.pendingRewards = _getCurrentUserReward(currentPoolRate_, userData);

        // Update pool data
        poolData.lastUpdate = uint128(block.timestamp);
        poolData.rate = currentPoolRate_;
        poolData.totalDeposited += amount_;

        // Update user data
        userData.lastStake = uint128(block.timestamp);
        userData.rate = currentPoolRate_;
        userData.deposited += amount_;

        emit UserStaked(poolId_, user_, amount_);
    }

    function _withdraw(address user_, uint256 poolId_, uint256 amount_, uint256 currentPoolRate_) private {
        Pool storage pool = pools[poolId_];
        PoolData storage poolData = poolsData[poolId_];
        UserData storage userData = usersData[user_][poolId_];

        uint256 deposited_ = userData.deposited;
        require(deposited_ > 0, "DS: user isn't staked");

        if (amount_ > deposited_) {
            amount_ = deposited_;
        }

        uint256 newDeposited_;
        if (pool.isPublic) {
            require(
                block.timestamp < pool.payoutStart ||
                    (block.timestamp > pool.payoutStart + pool.withdrawLockPeriod &&
                        block.timestamp > userData.lastStake + pool.withdrawLockPeriodAfterStake),
                "DS: pool withdraw is locked"
            );

            uint256 depositTokenContractBalance_ = IERC20(depositToken).balanceOf(address(this));
            if (amount_ > depositTokenContractBalance_) {
                amount_ = depositTokenContractBalance_;
            }

            newDeposited_ = deposited_ - amount_;

            require(amount_ > 0, "DS: nothing to withdraw");
            require(newDeposited_ >= pool.minimalStake || newDeposited_ == 0, "DS: invalid withdraw amount");
        } else {
            newDeposited_ = deposited_ - amount_;
        }

        uint256 pendingRewards_ = _getCurrentUserReward(currentPoolRate_, userData);

        // Update pool data
        poolData.lastUpdate = uint128(block.timestamp);
        poolData.rate = currentPoolRate_;
        poolData.totalDeposited -= amount_;

        // Update user data
        userData.rate = currentPoolRate_;
        userData.deposited = newDeposited_;
        userData.pendingRewards = pendingRewards_;

        if (pool.isPublic) {
            totalDepositedInPublicPools -= amount_;

            IERC20(depositToken).safeTransfer(user_, amount_);
        }

        emit UserWithdrawn(poolId_, user_, amount_);
    }

    function _getCurrentUserReward(uint256 currentPoolRate_, UserData memory userData_) private pure returns (uint256) {
        uint256 newRewards_ = ((currentPoolRate_ - userData_.rate) * userData_.deposited) / PRECISION;

        return userData_.pendingRewards + newRewards_;
    }

    function _getCurrentPoolRate(uint256 poolId_) private view returns (uint256) {
        PoolData storage poolData = poolsData[poolId_];

        if (poolData.totalDeposited == 0) {
            return poolData.rate;
        }

        uint256 rewards_ = getPeriodReward(poolId_, poolData.lastUpdate, uint128(block.timestamp));

        return poolData.rate + (rewards_ * PRECISION) / poolData.totalDeposited;
    }

    function _poolExists(uint256 poolId_) private view returns (bool) {
        return poolId_ < pools.length;
    }

    /**********************************************************************************************/
    /*** Bridge                                                                                 ***/
    /**********************************************************************************************/

    function overplus() public view returns (uint256) {
        uint256 depositTokenContractBalance_ = IERC20(depositToken).balanceOf(address(this));
        if (depositTokenContractBalance_ <= totalDepositedInPublicPools) {
            return 0;
        }

        return depositTokenContractBalance_ - totalDepositedInPublicPools;
    }

    function bridgeOverplus(
        uint256 gasLimit_,
        uint256 maxFeePerGas_,
        uint256 maxSubmissionCost_
    ) external payable onlyOwner returns (bytes memory) {
        uint256 overplus_ = overplus();
        require(overplus_ > 0, "DS: overplus is zero");

        IERC20(depositToken).safeTransfer(l1Sender, overplus_);

        bytes memory bridgeMessageId_ = L1Sender(l1Sender).sendDepositToken{value: msg.value}(
            gasLimit_,
            maxFeePerGas_,
            maxSubmissionCost_
        );

        emit OverplusBridged(overplus_, bridgeMessageId_);

        return bridgeMessageId_;
    }

    /**********************************************************************************************/
    /*** UUPS                                                                                   ***/
    /**********************************************************************************************/

    function removeUpgradeability() external onlyOwner {
        isNotUpgradeable = true;
    }

    function _authorizeUpgrade(address) internal view override onlyOwner {
        require(!isNotUpgradeable, "DS: upgrade isn't available");
    }
}

// SPDX-License-Identifier: Apache-2.0

/*
 * Copyright 2021, Offchain Labs, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

pragma solidity ^0.8.0;

/// @notice this library manages encoding and decoding of gateway communication
library GatewayMessageHandler {
    // these are for communication from L1 to L2 gateway

    function encodeToL2GatewayMsg(bytes memory gatewayData, bytes memory callHookData)
        internal
        pure
        returns (bytes memory res)
    {
        res = abi.encode(gatewayData, callHookData);
    }

    function parseFromL1GatewayMsg(bytes calldata _data)
        internal
        pure
        returns (bytes memory gatewayData, bytes memory callHookData)
    {
        // abi decode may revert, but the encoding is done by L1 gateway, so we trust it
        (gatewayData, callHookData) = abi.decode(_data, (bytes, bytes));
    }

    // these are for communication from L2 to L1 gateway

    function encodeFromL2GatewayMsg(uint256 exitNum, bytes memory callHookData)
        internal
        pure
        returns (bytes memory res)
    {
        res = abi.encode(exitNum, callHookData);
    }

    function parseToL1GatewayMsg(bytes calldata _data)
        internal
        pure
        returns (uint256 exitNum, bytes memory callHookData)
    {
        // abi decode may revert, but the encoding is done by L1 gateway, so we trust it
        (exitNum, callHookData) = abi.decode(_data, (uint256, bytes));
    }

    // these are for communication from router to gateway

    function encodeFromRouterToGateway(address _from, bytes calldata _data)
        internal
        pure
        returns (bytes memory res)
    {
        // abi decode may revert, but the encoding is done by L1 gateway, so we trust it
        return abi.encode(_from, _data);
    }

    function parseFromRouterToGateway(bytes calldata _data)
        internal
        pure
        returns (address, bytes memory res)
    {
        // abi decode may revert, but the encoding is done by L1 gateway, so we trust it
        return abi.decode(_data, (address, bytes));
    }
}

// SPDX-License-Identifier: Apache-2.0

/*
 * Copyright 2020, Offchain Labs, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

pragma solidity ^0.8.0;

import "../ProxyUtil.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "./TokenGateway.sol";
import "./GatewayMessageHandler.sol";

/**
 * @title Common interface for L1 and L2 Gateway Routers
 */
interface IGatewayRouter is ITokenGateway {
    function defaultGateway() external view returns (address gateway);

    event TransferRouted(
        address indexed token,
        address indexed _userFrom,
        address indexed _userTo,
        address gateway
    );

    event GatewaySet(address indexed l1Token, address indexed gateway);
    event DefaultGatewayUpdated(address newDefaultGateway);

    function getGateway(address _token) external view returns (address gateway);
}

// SPDX-License-Identifier: Apache-2.0

/*
 * Copyright 2020, Offchain Labs, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// solhint-disable-next-line compiler-version
pragma solidity >=0.6.9 <0.9.0;

interface ITokenGateway {
    /// @notice event deprecated in favor of DepositInitiated and WithdrawalInitiated
    // event OutboundTransferInitiated(
    //     address token,
    //     address indexed _from,
    //     address indexed _to,
    //     uint256 indexed _transferId,
    //     uint256 _amount,
    //     bytes _data
    // );

    /// @notice event deprecated in favor of DepositFinalized and WithdrawalFinalized
    // event InboundTransferFinalized(
    //     address token,
    //     address indexed _from,
    //     address indexed _to,
    //     uint256 indexed _transferId,
    //     uint256 _amount,
    //     bytes _data
    // );

    function outboundTransfer(
        address _token,
        address _to,
        uint256 _amount,
        uint256 _maxGas,
        uint256 _gasPriceBid,
        bytes calldata _data
    ) external payable returns (bytes memory);

    function finalizeInboundTransfer(
        address _token,
        address _from,
        address _to,
        uint256 _amount,
        bytes calldata _data
    ) external payable;

    /**
     * @notice Calculate the address used when bridging an ERC20 token
     * @dev the L1 and L2 address oracles may not always be in sync.
     * For example, a custom token may have been registered but not deploy or the contract self destructed.
     * @param l1ERC20 address of L1 token
     * @return L2 address of a bridged ERC20 token
     */
    function calculateL2TokenAddress(address l1ERC20) external view returns (address);

    function getOutboundCalldata(
        address _token,
        address _from,
        address _to,
        uint256 _amount,
        bytes memory _data
    ) external view returns (bytes memory);
}

// SPDX-License-Identifier: Apache-2.0

/*
 * Copyright 2020, Offchain Labs, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

pragma solidity ^0.8.0;

import "./ITokenGateway.sol";
import "@openzeppelin/contracts/utils/Address.sol";

abstract contract TokenGateway is ITokenGateway {
    using Address for address;

    address public counterpartGateway;
    address public router;

    // This modifier is overriden in gateways to validate the message sender
    // For L1 to L2 messages need to be validated against the aliased counterpartGateway
    // For L2 to L1 messages need to be validated against the bridge and L2ToL1Sender
    // prettier-ignore
    modifier onlyCounterpartGateway() virtual;

    function _initialize(address _counterpartGateway, address _router) internal virtual {
        // This initializes internal variables of the abstract contract it can be chained together with other functions.
        // It is virtual so subclasses can override or wrap around this logic.
        // An example where this is useful is different subclasses that validate the router address differently
        require(_counterpartGateway != address(0), "INVALID_COUNTERPART");
        require(counterpartGateway == address(0), "ALREADY_INIT");
        counterpartGateway = _counterpartGateway;
        router = _router;
    }

    function isRouter(address _target) internal view returns (bool isTargetRouter) {
        return _target == router;
    }

    /**
     * @notice Calculate the address used when bridging an ERC20 token
     * @dev the L1 and L2 address oracles may not always be in sync.
     * For example, a custom token may have been registered but not deploy or the contract self destructed.
     * @param l1ERC20 address of L1 token
     * @return L2 address of a bridged ERC20 token
     */
    function calculateL2TokenAddress(address l1ERC20)
        public
        view
        virtual
        override
        returns (address);
}

// SPDX-License-Identifier: Apache-2.0

/*
 * Copyright 2021, Offchain Labs, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

pragma solidity ^0.8.0;

library ProxyUtil {
    function getProxyAdmin() internal view returns (address admin) {
        // https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.4.0/contracts/proxy/TransparentUpgradeableProxy.sol#L48
        // Storage slot with the admin of the proxy contract.
        // This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
        bytes32 slot = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
        assembly {
            admin := sload(slot)
        }
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity >=0.5.0;

import "./ILayerZeroUserApplicationConfig.sol";

interface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig {
    // @notice send a LayerZero message to the specified address at a LayerZero endpoint.
    // @param _dstChainId - the destination chain identifier
    // @param _destination - the address on destination chain (in bytes). address length/format may vary by chains
    // @param _payload - a custom bytes payload to send to the destination contract
    // @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address
    // @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction
    // @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination
    function send(
        uint16 _dstChainId,
        bytes calldata _destination,
        bytes calldata _payload,
        address payable _refundAddress,
        address _zroPaymentAddress,
        bytes calldata _adapterParams
    ) external payable;

    // @notice used by the messaging library to publish verified payload
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source contract (as bytes) at the source chain
    // @param _dstAddress - the address on destination chain
    // @param _nonce - the unbound message ordering nonce
    // @param _gasLimit - the gas limit for external contract execution
    // @param _payload - verified payload to send to the destination contract
    function receivePayload(
        uint16 _srcChainId,
        bytes calldata _srcAddress,
        address _dstAddress,
        uint64 _nonce,
        uint _gasLimit,
        bytes calldata _payload
    ) external;

    // @notice get the inboundNonce of a receiver from a source chain which could be EVM or non-EVM chain
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (uint64);

    // @notice get the outboundNonce from this source chain which, consequently, is always an EVM
    // @param _srcAddress - the source chain contract address
    function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view returns (uint64);

    // @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery
    // @param _dstChainId - the destination chain identifier
    // @param _userApplication - the user app address on this EVM chain
    // @param _payload - the custom message to send over LayerZero
    // @param _payInZRO - if false, user app pays the protocol fee in native token
    // @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain
    function estimateFees(
        uint16 _dstChainId,
        address _userApplication,
        bytes calldata _payload,
        bool _payInZRO,
        bytes calldata _adapterParam
    ) external view returns (uint nativeFee, uint zroFee);

    // @notice get this Endpoint's immutable source identifier
    function getChainId() external view returns (uint16);

    // @notice the interface to retry failed message on this Endpoint destination
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    // @param _payload - the payload to be retried
    function retryPayload(uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload) external;

    // @notice query if any STORED payload (message blocking) at the endpoint.
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool);

    // @notice query if the _libraryAddress is valid for sending msgs.
    // @param _userApplication - the user app address on this EVM chain
    function getSendLibraryAddress(address _userApplication) external view returns (address);

    // @notice query if the _libraryAddress is valid for receiving msgs.
    // @param _userApplication - the user app address on this EVM chain
    function getReceiveLibraryAddress(address _userApplication) external view returns (address);

    // @notice query if the non-reentrancy guard for send() is on
    // @return true if the guard is on. false otherwise
    function isSendingPayload() external view returns (bool);

    // @notice query if the non-reentrancy guard for receive() is on
    // @return true if the guard is on. false otherwise
    function isReceivingPayload() external view returns (bool);

    // @notice get the configuration of the LayerZero messaging library of the specified version
    // @param _version - messaging library version
    // @param _chainId - the chainId for the pending config change
    // @param _userApplication - the contract address of the user application
    // @param _configType - type of configuration. every messaging library has its own convention.
    function getConfig(
        uint16 _version,
        uint16 _chainId,
        address _userApplication,
        uint _configType
    ) external view returns (bytes memory);

    // @notice get the send() LayerZero messaging library version
    // @param _userApplication - the contract address of the user application
    function getSendVersion(address _userApplication) external view returns (uint16);

    // @notice get the lzReceive() LayerZero messaging library version
    // @param _userApplication - the contract address of the user application
    function getReceiveVersion(address _userApplication) external view returns (uint16);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity >=0.5.0;

interface ILayerZeroUserApplicationConfig {
    // @notice set the configuration of the LayerZero messaging library of the specified version
    // @param _version - messaging library version
    // @param _chainId - the chainId for the pending config change
    // @param _configType - type of configuration. every messaging library has its own convention.
    // @param _config - configuration in the bytes. can encode arbitrary content.
    function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external;

    // @notice set the send() LayerZero messaging library version to _version
    // @param _version - new messaging library version
    function setSendVersion(uint16 _version) external;

    // @notice set the lzReceive() LayerZero messaging library version to _version
    // @param _version - new messaging library version
    function setReceiveVersion(uint16 _version) external;

    // @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload
    // @param _srcChainId - the chainId of the source chain
    // @param _srcAddress - the contract address of the source contract at the source chain
    function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

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

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

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

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822ProxiableUpgradeable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC1967.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 *
 * _Available since v4.8.3._
 */
interface IERC1967Upgradeable {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/IERC1967Upgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 */
abstract contract ERC1967UpgradeUpgradeable is Initializable, IERC1967Upgradeable {
    function __ERC1967Upgrade_init() internal onlyInitializing {
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            AddressUpgradeable.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data, bool forceCall) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            AddressUpgradeable.functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
        _;
    }

    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
        return _IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeTo(address newImplementation) public virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) public payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/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
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

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:
 * ```solidity
 * 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`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
library StorageSlotUpgradeable {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes 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
        }
    }

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

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }

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

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 (last updated v4.9.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/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;

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

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

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

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    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");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

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

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

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    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");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation 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).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/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
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

uint256 constant PRECISION = 10 ** 25;
uint256 constant DECIMAL = 10 ** 18;
uint256 constant PERCENTAGE_100 = 10 ** 27;

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/**
 * This is Distribution contract that stores all the pools and users data.
 * It is used to calculate the user's rewards and operate with overpluses.
 */
interface IDistribution {
    /**
     * The structure that stores the core pool's data.
     * @param payoutStart The timestamp when the pool starts to pay out rewards.
     * @param decreaseInterval The interval in seconds between reward decreases.
     * @param withdrawLockPeriod The period in seconds when the user can't withdraw his stake.
     * @param withdrawLockPeriodAfterStake The period in seconds when the user can't withdraw his stake after staking.
     * @param claimLockPeriod The period in seconds when the user can't claim his rewards.
     * @param initialReward The initial reward per interval.
     * @param rewardDecrease The reward decrease per interval.
     * @param minimalStake The minimal stake amount.
     * @param isPublic The flag that indicates if the pool is public.
     */
    struct Pool {
        uint128 payoutStart;
        uint128 decreaseInterval;
        uint128 withdrawLockPeriod;
        uint128 claimLockPeriod;
        uint128 withdrawLockPeriodAfterStake;
        uint256 initialReward;
        uint256 rewardDecrease;
        uint256 minimalStake;
        bool isPublic;
    }

    /**
     * The structure that stores the pool's rate data.
     * @param lastUpdate The timestamp when the pool was updated.
     * @param rate The current reward rate.
     * @param totalDeposited The total amount of tokens deposited in the pool.
     */
    struct PoolData {
        uint128 lastUpdate;
        uint256 rate;
        uint256 totalDeposited;
    }

    /**
     * The structure that stores the user's rate data of pool.
     * @param lastStake The timestamp when the user last staked tokens.
     * @param deposited The amount of tokens deposited in the pool.
     * @param rate The current reward rate.
     * @param pendingRewards The amount of pending rewards.
     */
    struct UserData {
        uint128 lastStake;
        uint256 deposited;
        uint256 rate;
        uint256 pendingRewards;
    }

    /**
     * The event that is emitted when the pool is created.
     * @param poolId The pool's id.
     * @param pool The pool's data.
     */
    event PoolCreated(uint256 indexed poolId, Pool pool);

    /**
     * The event that is emitted when the pool is edited.
     * @param poolId The pool's id.
     * @param pool The pool's data.
     */
    event PoolEdited(uint256 indexed poolId, Pool pool);

    /**
     * The event that is emitted when the user stakes tokens in the pool.
     * @param poolId The pool's id.
     * @param user The user's address.
     * @param amount The amount of tokens.
     */
    event UserStaked(uint256 indexed poolId, address indexed user, uint256 amount);

    /**
     * The event that is emitted when the user claims rewards from the pool.
     * @param poolId The pool's id.
     * @param user The user's address.
     * @param receiver The receiver's address.
     * @param amount The amount of tokens.
     */
    event UserClaimed(uint256 indexed poolId, address indexed user, address receiver, uint256 amount);

    /**
     * The event that is emitted when the user withdraws tokens from the pool.
     * @param poolId The pool's id.
     * @param user The user's address.
     * @param amount The amount of tokens.
     */
    event UserWithdrawn(uint256 indexed poolId, address indexed user, uint256 amount);

    /**
     * The event that is emitted when the overplus of the deposit tokens is bridged.
     */
    event OverplusBridged(uint256 amount, bytes uniqueId);

    /**
     * The function to initialize the contract.
     * @param depositToken_ The address of deposit token.
     * @param l1Sender_ The address of bridge contract.
     * @param poolsInfo_ The array of initial pools.
     */
    function Distribution_init(address depositToken_, address l1Sender_, Pool[] calldata poolsInfo_) external;

    /**
     * The function to create a new pool.
     * @param pool_ The pool's data.
     */
    function createPool(Pool calldata pool_) external;

    /**
     * The function to edit the pool's data.
     * @param poolId The pool's id.
     * @param pool_ The new pool's data.
     */
    function editPool(uint256 poolId, Pool calldata pool_) external;

    /**
     * The function to calculate the total pool's reward for the specified period.
     * @param poolId_ The pool's id.
     * @param startTime_ The start timestamp.
     * @param endTime_ The end timestamp.
     * @return The total reward amount.
     */
    function getPeriodReward(uint256 poolId_, uint128 startTime_, uint128 endTime_) external view returns (uint256);

    /**
     * The function to manage users and their rate in the private pool.
     * @param poolId_ The pool's id.
     * @param users_ The array of users.
     * @param amounts_ The array of amounts.
     */
    function manageUsersInPrivatePool(uint256 poolId_, address[] calldata users_, uint256[] calldata amounts_) external;

    /**
     * The function to stake tokens in the public pool.
     * @param poolId_ The pool's id.
     * @param amount_ The amount of tokens to stake.
     */
    function stake(uint256 poolId_, uint256 amount_) external;

    /**
     * The function to claim rewards from the pool.
     * @param poolId_ The pool's id.
     * @param receiver_ The receiver's address.
     */
    function claim(uint256 poolId_, address receiver_) external payable;

    /**
     * The function to withdraw tokens from the pool.
     * @param poolId_ The pool's id.
     * @param amount_ The amount of tokens to withdraw.
     */
    function withdraw(uint256 poolId_, uint256 amount_) external;

    /**
     * The function to get the user's reward for the specified pool.
     * @param poolId_ The pool's id.
     * @param user_ The user's address.
     * @return The user's reward amount.
     */
    function getCurrentUserReward(uint256 poolId_, address user_) external view returns (uint256);

    /**
     * The function to calculate the total overplus of the staked deposit tokens.
     * @return The total overplus amount.
     */
    function overplus() external view returns (uint256);

    /**
     * The function to bridge the overplus of the staked deposit tokens.
     * @param gasLimit_ The gas limit.
     * @param maxFeePerGas_ The max fee per gas.
     * @param maxSubmissionCost_ The max submission cost.
     * @return The unique identifier for withdrawal.
     */
    function bridgeOverplus(
        uint256 gasLimit_,
        uint256 maxFeePerGas_,
        uint256 maxSubmissionCost_
    ) external payable returns (bytes memory);

    /**
     * The function to remove upgradeability.
     */
    function removeUpgradeability() external;

    /**
     * The function to check if the contract is upgradeable.
     * @return The flag that indicates if the contract is upgradeable.
     */
    function isNotUpgradeable() external view returns (bool);

    /**
     * The function to get the address of deposit token.
     * @return The address of deposit token.
     */
    function depositToken() external view returns (address);

    /**
     * The function to get the address of bridge contract.
     * @return The address of bridge contract.
     */
    function l1Sender() external view returns (address);

    /**
     * The function to get the amount of deposit tokens that are staked in all of the public pools.
     * @dev The value accumulates the amount amount despite the rate differences.
     * @return The amount of deposit tokens.
     */
    function totalDepositedInPublicPools() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {IERC165} from "@openzeppelin/contracts/utils/introspection/ERC165.sol";

interface IL1Sender is IERC165 {
    /**
     * The structure that stores the deposit token's data.
     * @param token The address of wrapped deposit token.
     * @param gateway The address of token's gateway.
     * @param receiver The address of wrapped token's receiver on L2.
     */
    struct DepositTokenConfig {
        address token;
        address gateway;
        address receiver;
    }

    /**
     * The structure that stores the reward token's data.
     * @param gateway The address of token's gateway.
     * @param receiver The address of token's receiver on L2.
     * @param receiverChainId The chain id of receiver.
     * @param zroPaymentAddress The address of ZKSync payment contract.
     * @param adapterParams The parameters for the adapter.
     */
    struct RewardTokenConfig {
        address gateway;
        address receiver;
        uint16 receiverChainId;
        address zroPaymentAddress;
        bytes adapterParams;
    }

    /**
     * The function to get the deposit token's address.
     */
    function unwrappedDepositToken() external view returns (address);

    /**
     * The function to set the reward token's config.
     * @param newConfig_ The new reward token's config.
     */
    function setRewardTokenConfig(RewardTokenConfig calldata newConfig_) external;

    /**
     * The function to set the deposit token's config.
     * @param newConfig_ The new deposit token's config.
     */
    function setDepositTokenConfig(DepositTokenConfig calldata newConfig_) external;

    /**
     * The function to send all current balance of the deposit token to the L2.
     * @param gasLimit_ The gas limit for the L2 transaction.
     * @param maxFeePerGas_ The max fee per gas for the L2 transaction.
     * @param maxSubmissionCost_ The max submission cost for the L2 transaction.
     * @return The unique identifier for withdrawal.
     */
    function sendDepositToken(
        uint256 gasLimit_,
        uint256 maxFeePerGas_,
        uint256 maxSubmissionCost_
    ) external payable returns (bytes memory);

    /**
     * The function to send the message of mint of reward token to the L2.
     * @param user_ The user's address to mint reward tokens.
     * @param amount_ The amount of reward tokens to mint.
     * @param refundTo_ The address to refund the overpaid gas.
     */
    function sendMintMessage(address user_, uint256 amount_, address refundTo_) external payable;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IWStETH is IERC20 {
    function stETH() external returns (address);

    function wrap(uint256 _stETHAmount) external returns (uint256);

    function unwrap(uint256 _wstETHAmount) external returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {ILayerZeroEndpoint} from "@layerzerolabs/lz-evm-sdk-v1-0.7/contracts/interfaces/ILayerZeroEndpoint.sol";

import {IGatewayRouter} from "@arbitrum/token-bridge-contracts/contracts/tokenbridge/libraries/gateway/IGatewayRouter.sol";

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {UUPSUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";

import {IL1Sender, IERC165} from "./interfaces/IL1Sender.sol";
import {IWStETH} from "./interfaces/tokens/IWStETH.sol";

contract L1Sender is IL1Sender, OwnableUpgradeable, UUPSUpgradeable {
    address public unwrappedDepositToken;
    address public distribution;

    DepositTokenConfig public depositTokenConfig;
    RewardTokenConfig public rewardTokenConfig;

    modifier onlyDistribution() {
        require(_msgSender() == distribution, "L1S: invalid sender");
        _;
    }

    constructor() {
        _disableInitializers();
    }

    function L1Sender__init(
        address distribution_,
        RewardTokenConfig calldata rewardTokenConfig_,
        DepositTokenConfig calldata depositTokenConfig_
    ) external initializer {
        __Ownable_init();
        __UUPSUpgradeable_init();

        setDistribution(distribution_);
        setRewardTokenConfig(rewardTokenConfig_);
        setDepositTokenConfig(depositTokenConfig_);
    }

    function supportsInterface(bytes4 interfaceId_) external pure returns (bool) {
        return interfaceId_ == type(IL1Sender).interfaceId || interfaceId_ == type(IERC165).interfaceId;
    }

    function setDistribution(address distribution_) public onlyOwner {
        distribution = distribution_;
    }

    function setRewardTokenConfig(RewardTokenConfig calldata newConfig_) public onlyOwner {
        rewardTokenConfig = newConfig_;
    }

    function setDepositTokenConfig(DepositTokenConfig calldata newConfig_) public onlyOwner {
        require(newConfig_.receiver != address(0), "L1S: invalid receiver");

        DepositTokenConfig storage oldConfig = depositTokenConfig;

        _replaceDepositToken(oldConfig.token, newConfig_.token);
        _replaceDepositTokenGateway(oldConfig.gateway, newConfig_.gateway, oldConfig.token, newConfig_.token);

        depositTokenConfig = newConfig_;
    }

    function _replaceDepositToken(address oldToken_, address newToken_) private {
        bool isTokenChanged_ = oldToken_ != newToken_;

        if (oldToken_ != address(0) && isTokenChanged_) {
            // Remove allowance from stETH to wstETH
            IERC20(unwrappedDepositToken).approve(oldToken_, 0);
        }

        if (isTokenChanged_) {
            // Get stETH from wstETH
            address unwrappedToken_ = IWStETH(newToken_).stETH();
            // Increase allowance from stETH to wstETH. To exchange stETH for wstETH
            IERC20(unwrappedToken_).approve(newToken_, type(uint256).max);

            unwrappedDepositToken = unwrappedToken_;
        }
    }

    function _replaceDepositTokenGateway(
        address oldGateway_,
        address newGateway_,
        address oldToken_,
        address newToken_
    ) private {
        bool isAllowedChanged_ = (oldToken_ != newToken_) || (oldGateway_ != newGateway_);

        if (oldGateway_ != address(0) && isAllowedChanged_) {
            IERC20(oldToken_).approve(IGatewayRouter(oldGateway_).getGateway(oldToken_), 0);
        }

        if (isAllowedChanged_) {
            IERC20(newToken_).approve(IGatewayRouter(newGateway_).getGateway(newToken_), type(uint256).max);
        }
    }

    function sendDepositToken(
        uint256 gasLimit_,
        uint256 maxFeePerGas_,
        uint256 maxSubmissionCost_
    ) external payable onlyDistribution returns (bytes memory) {
        DepositTokenConfig storage config = depositTokenConfig;

        // Get current stETH balance
        uint256 amountUnwrappedToken_ = IERC20(unwrappedDepositToken).balanceOf(address(this));
        // Wrap all stETH to wstETH
        uint256 amount_ = IWStETH(config.token).wrap(amountUnwrappedToken_);

        bytes memory data_ = abi.encode(maxSubmissionCost_, "");

        return
            IGatewayRouter(config.gateway).outboundTransfer{value: msg.value}(
                config.token,
                config.receiver,
                amount_,
                gasLimit_,
                maxFeePerGas_,
                data_
            );
    }

    function sendMintMessage(address user_, uint256 amount_, address refundTo_) external payable onlyDistribution {
        RewardTokenConfig storage config = rewardTokenConfig;

        bytes memory receiverAndSenderAddresses_ = abi.encodePacked(config.receiver, address(this));
        bytes memory payload_ = abi.encode(user_, amount_);

        ILayerZeroEndpoint(config.gateway).send{value: msg.value}(
            config.receiverChainId, // communicator LayerZero chainId
            receiverAndSenderAddresses_, // send to this address to the communicator
            payload_, // bytes payload
            payable(refundTo_), // refund address
            config.zroPaymentAddress, // future parameter
            config.adapterParams // adapterParams (see "Advanced Features")
        );
    }

    function _authorizeUpgrade(address) internal view override onlyOwner {}
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/**
 * This is the library that calculates the reward for the period with linear distribution and interval decrease.
 * Supports the constant reward amount (decreaseAmount_ = 0)
 */
library LinearDistributionIntervalDecrease {
    /**
     * The function to calculate the reward for the period.
     * @param initialAmount_ The initial reward amount.
     * @param decreaseAmount_ The reward decrease amount.
     * @param payoutStart_ The timestamp when the period starts to pay out rewards.
     * @param interval_ The interval in seconds between reward decreases.
     * @param startTime_ The timestamp when the period starts.
     * @param endTime_ The timestamp when the period ends.
     * @return The reward amount.
     */
    function getPeriodReward(
        uint256 initialAmount_,
        uint256 decreaseAmount_,
        uint128 payoutStart_,
        uint128 interval_,
        uint128 startTime_,
        uint128 endTime_
    ) external pure returns (uint256) {
        if (interval_ == 0) {
            return 0;
        }

        // 'startTime_' can't be less than 'payoutStart_'
        if (startTime_ < payoutStart_) {
            startTime_ = payoutStart_;
        }

        uint128 maxEndTime_ = _calculateMaxEndTime(payoutStart_, interval_, initialAmount_, decreaseAmount_);

        if (endTime_ > maxEndTime_) {
            endTime_ = maxEndTime_;
        }

        // Return 0 when calculation 'startTime_' is bigger then 'endTime_'...
        if (startTime_ >= endTime_) {
            return 0;
        }

        // Calculate interval that less then 'interval_' range
        uint256 timePassedBefore_ = startTime_ - payoutStart_;
        if ((timePassedBefore_ / interval_) == ((endTime_ - payoutStart_) / interval_)) {
            uint256 intervalsPassed_ = timePassedBefore_ / interval_;
            uint256 intervalFullReward_ = initialAmount_ - intervalsPassed_ * decreaseAmount_;

            return (intervalFullReward_ * (endTime_ - startTime_)) / interval_;
        }

        // Calculate interval that more then 'interval_' range
        uint256 firstPeriodReward_ = _calculatePartPeriodReward(
            payoutStart_,
            startTime_,
            interval_,
            initialAmount_,
            decreaseAmount_,
            true
        );

        uint256 secondPeriodReward_ = _calculateFullPeriodReward(
            payoutStart_,
            startTime_,
            endTime_,
            interval_,
            initialAmount_,
            decreaseAmount_
        );

        uint256 thirdPeriodReward_ = _calculatePartPeriodReward(
            payoutStart_,
            endTime_,
            interval_,
            initialAmount_,
            decreaseAmount_,
            false
        );

        return firstPeriodReward_ + secondPeriodReward_ + thirdPeriodReward_;
    }

    function _calculateMaxEndTime(
        uint128 payoutStart_,
        uint128 interval_,
        uint256 initialAmount_,
        uint256 decreaseAmount_
    ) private pure returns (uint128) {
        if (decreaseAmount_ == 0) {
            return type(uint128).max;
        }

        uint256 maxIntervals_ = _divideCeil(initialAmount_, decreaseAmount_);

        return uint128(payoutStart_ + maxIntervals_ * interval_);
    }

    function _calculatePartPeriodReward(
        uint128 payoutStart_,
        uint128 startTime_,
        uint128 interval_,
        uint256 initialAmount_,
        uint256 decreaseAmount_,
        bool toEnd_
    ) private pure returns (uint256) {
        uint256 intervalsPassed_ = (startTime_ - payoutStart_) / interval_;
        uint256 decreaseRewardAmount_ = intervalsPassed_ * decreaseAmount_;
        if (decreaseRewardAmount_ >= initialAmount_) {
            return 0;
        }
        uint256 intervalFullReward_ = initialAmount_ - decreaseRewardAmount_;

        uint256 intervalPart_;
        if (toEnd_) {
            intervalPart_ = interval_ * (intervalsPassed_ + 1) + payoutStart_ - startTime_;
        } else {
            intervalPart_ = startTime_ - interval_ * intervalsPassed_ - payoutStart_;
        }

        if (intervalPart_ == interval_) {
            return 0;
        }

        return (intervalFullReward_ * intervalPart_) / interval_;
    }

    function _calculateFullPeriodReward(
        uint128 payoutStart_,
        uint128 startTime_,
        uint128 endTime_,
        uint128 interval_,
        uint256 initialAmount_,
        uint256 decreaseAmount_
    ) private pure returns (uint256) {
        // START calculate initial reward when period start
        uint256 timePassedBefore_ = startTime_ - payoutStart_;
        uint256 intervalsPassedBefore_ = _divideCeil(timePassedBefore_, interval_);

        uint256 decreaseRewardAmount_ = intervalsPassedBefore_ * decreaseAmount_;

        if (decreaseRewardAmount_ >= initialAmount_) {
            return 0;
        }

        uint256 initialReward_ = initialAmount_ - decreaseRewardAmount_;
        // END

        // Intervals passed
        uint256 ip_ = ((endTime_ - payoutStart_ - intervalsPassedBefore_ * interval_) / interval_);
        if (ip_ == 0) {
            return 0;
        }

        return initialReward_ * ip_ - (decreaseAmount_ * (ip_ * (ip_ - 1))) / 2;
    }

    function _divideCeil(uint256 a_, uint256 b_) private pure returns (uint256) {
        return (a_ + b_ - 1) / b_;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {
    "contracts/libs/LinearDistributionIntervalDecrease.sol": {
      "LinearDistributionIntervalDecrease": "0x7431ada8a591c955a994a21710752ef9b882b8e3"
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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