// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

interface IDeBridgeGate {
    /* ========== STRUCTS ========== */

    struct TokenInfo {
        uint256 nativeChainId;
        bytes nativeAddress;
    }

    struct DebridgeInfo {
        uint256 chainId; // native chain id
        uint256 maxAmount; // maximum amount to transfer
        uint256 balance; // total locked assets
        uint256 lockedInStrategies; // total locked assets in strategy (AAVE, Compound, etc)
        address tokenAddress; // asset address on the current chain
        uint16 minReservesBps; // minimal hot reserves in basis points (1/10000)
        bool exist;
    }

    struct DebridgeFeeInfo {
        uint256 collectedFees; // total collected fees
        uint256 withdrawnFees; // fees that already withdrawn
        mapping(uint256 => uint256) getChainFee; // whether the chain for the asset is supported
    }

    struct ChainSupportInfo {
        uint256 fixedNativeFee; // transfer fixed fee
        bool isSupported; // whether the chain for the asset is supported
        uint16 transferFeeBps; // transfer fee rate nominated in basis points (1/10000) of transferred amount
    }

    struct DiscountInfo {
        uint16 discountFixBps; // fix discount in BPS
        uint16 discountTransferBps; // transfer % discount in BPS
    }

    /// @param executionFee Fee paid to the transaction executor.
    /// @param fallbackAddress Receiver of the tokens if the call fails.
    struct SubmissionAutoParamsTo {
        uint256 executionFee;
        uint256 flags;
        bytes fallbackAddress;
        bytes data;
    }

    /// @param executionFee Fee paid to the transaction executor.
    /// @param fallbackAddress Receiver of the tokens if the call fails.
    struct SubmissionAutoParamsFrom {
        uint256 executionFee;
        uint256 flags;
        address fallbackAddress;
        bytes data;
        bytes nativeSender;
    }

    struct FeeParams {
        uint256 receivedAmount;
        uint256 fixFee;
        uint256 transferFee;
        bool useAssetFee;
        bool isNativeToken;
    }

    /* ========== PUBLIC VARS GETTERS ========== */

    /// @dev Returns whether the transfer with the submissionId was claimed.
    /// submissionId is generated in getSubmissionIdFrom
    function isSubmissionUsed(bytes32 submissionId) external returns (bool);

    /// @dev Returns native token info by wrapped token address
    function getNativeInfo(address token) external returns (
        uint256 nativeChainId,
        bytes memory nativeAddress);

    /* ========== FUNCTIONS ========== */

    /// @dev This method is used for the transfer of assets [from the native chain](https://docs.debridge.finance/the-core-protocol/transfers#transfer-from-native-chain).
    /// It locks an asset in the smart contract in the native chain and enables minting of deAsset on the secondary chain.
    /// @param _tokenAddress Asset identifier.
    /// @param _amount Amount to be transferred (note: the fee can be applied).
    /// @param _chainIdTo Chain id of the target chain.
    /// @param _receiver Receiver address.
    /// @param _permit deadline + signature for approving the spender by signature.
    /// @param _useAssetFee use assets fee for pay protocol fix (work only for specials token)
    /// @param _referralCode Referral code
    /// @param _autoParams Auto params for external call in target network
    function send(
        address _tokenAddress,
        uint256 _amount,
        uint256 _chainIdTo,
        bytes memory _receiver,
        bytes memory _permit,
        bool _useAssetFee,
        uint32 _referralCode,
        bytes calldata _autoParams
    ) external payable;

    /// @dev Is used for transfers [into the native chain](https://docs.debridge.finance/the-core-protocol/transfers#transfer-from-secondary-chain-to-native-chain)
    /// to unlock the designated amount of asset from collateral and transfer it to the receiver.
    /// @param _debridgeId Asset identifier.
    /// @param _amount Amount of the transferred asset (note: the fee can be applied).
    /// @param _chainIdFrom Chain where submission was sent
    /// @param _receiver Receiver address.
    /// @param _nonce Submission id.
    /// @param _signatures Validators signatures to confirm
    /// @param _autoParams Auto params for external call
    function claim(
        bytes32 _debridgeId,
        uint256 _amount,
        uint256 _chainIdFrom,
        address _receiver,
        uint256 _nonce,
        bytes calldata _signatures,
        bytes calldata _autoParams
    ) external;

    /// @dev Get a flash loan, msg.sender must implement IFlashCallback
    /// @param _tokenAddress An asset to loan
    /// @param _receiver Where funds should be sent
    /// @param _amount Amount to loan
    /// @param _data Data to pass to sender's flashCallback function
    function flash(
        address _tokenAddress,
        address _receiver,
        uint256 _amount,
        bytes memory _data
    ) external;

    /// @dev Get reserves of a token available to use in defi
    /// @param _tokenAddress Token address
    function getDefiAvaliableReserves(address _tokenAddress) external view returns (uint256);

    /// @dev Request the assets to be used in DeFi protocol.
    /// @param _tokenAddress Asset address.
    /// @param _amount Amount of tokens to request.
    function requestReserves(address _tokenAddress, uint256 _amount) external;

    /// @dev Return the assets that were used in DeFi  protocol.
    /// @param _tokenAddress Asset address.
    /// @param _amount Amount of tokens to claim.
    function returnReserves(address _tokenAddress, uint256 _amount) external;

    /// @dev Withdraw collected fees to feeProxy
    /// @param _debridgeId Asset identifier.
    function withdrawFee(bytes32 _debridgeId) external;

    /// @dev Returns asset fixed fee value for specified debridge and chainId.
    /// @param _debridgeId Asset identifier.
    /// @param _chainId Chain id.
    function getDebridgeChainAssetFixedFee(
        bytes32 _debridgeId,
        uint256 _chainId
    ) external view returns (uint256);

    /* ========== EVENTS ========== */

    /// @dev Emitted once the tokens are sent from the original(native) chain to the other chain; the transfer tokens
    /// are expected to be claimed by the users.
    event Sent(
        bytes32 submissionId,
        bytes32 indexed debridgeId,
        uint256 amount,
        bytes receiver,
        uint256 nonce,
        uint256 indexed chainIdTo,
        uint32 referralCode,
        FeeParams feeParams,
        bytes autoParams,
        address nativeSender
        // bool isNativeToken //added to feeParams
    );

    /// @dev Emitted once the tokens are transferred and withdrawn on a target chain
    event Claimed(
        bytes32 submissionId,
        bytes32 indexed debridgeId,
        uint256 amount,
        address indexed receiver,
        uint256 nonce,
        uint256 indexed chainIdFrom,
        bytes autoParams,
        bool isNativeToken
    );

    /// @dev Emitted when new asset support is added.
    event PairAdded(
        bytes32 debridgeId,
        address tokenAddress,
        bytes nativeAddress,
        uint256 indexed nativeChainId,
        uint256 maxAmount,
        uint16 minReservesBps
    );

    event MonitoringSendEvent(
        bytes32 submissionId,
        uint256 nonce,
        uint256 lockedOrMintedAmount,
        uint256 totalSupply
    );

    event MonitoringClaimEvent(
        bytes32 submissionId,
        uint256 lockedOrMintedAmount,
        uint256 totalSupply
    );

    /// @dev Emitted when the asset is allowed/disallowed to be transferred to the chain.
    event ChainSupportUpdated(uint256 chainId, bool isSupported, bool isChainFrom);
    /// @dev Emitted when the supported chains are updated.
    event ChainsSupportUpdated(
        uint256 chainIds,
        ChainSupportInfo chainSupportInfo,
        bool isChainFrom);

    /// @dev Emitted when the new call proxy is set.
    event CallProxyUpdated(address callProxy);
    /// @dev Emitted when the transfer request is executed.
    event AutoRequestExecuted(
        bytes32 submissionId,
        bool indexed success,
        address callProxy
    );

    /// @dev Emitted when a submission is blocked.
    event Blocked(bytes32 submissionId);
    /// @dev Emitted when a submission is unblocked.
    event Unblocked(bytes32 submissionId);

    /// @dev Emitted when a flash loan is successfully returned.
    event Flash(
        address sender,
        address indexed tokenAddress,
        address indexed receiver,
        uint256 amount,
        uint256 paid
    );

    /// @dev Emitted when fee is withdrawn.
    event WithdrawnFee(bytes32 debridgeId, uint256 fee);

    /// @dev Emitted when globalFixedNativeFee and globalTransferFeeBps are updated.
    event FixedNativeFeeUpdated(
        uint256 globalFixedNativeFee,
        uint256 globalTransferFeeBps);

    /// @dev Emitted when globalFixedNativeFee is updated by feeContractUpdater
    event FixedNativeFeeAutoUpdated(uint256 globalFixedNativeFee);
}