// SPDX-License-Identifier: BUSL-1.1

pragma solidity >=0.7.0;

import "./ILayerZeroUserApplicationConfig.sol";

interface ILayerZeroMessagingLibrary {
    // send(), messages will be inflight.
    function send(
        address _userApplication,
        uint64 _lastNonce,
        uint16 _chainId,
        bytes calldata _destination,
        bytes calldata _payload,
        address payable refundAddress,
        address _zroPaymentAddress,
        bytes calldata _adapterParams
    ) external payable;

    // estimate native fee at the send side
    function estimateFees(
        uint16 _chainId,
        address _userApplication,
        bytes calldata _payload,
        bool _payInZRO,
        bytes calldata _adapterParam
    ) external view returns (uint nativeFee, uint zroFee);

    //---------------------------------------------------------------------------
    // setConfig / getConfig are User Application (UA) functions to specify Oracle, Relayer, blockConfirmations, libraryVersion
    function setConfig(uint16 _chainId, address _userApplication, uint _configType, bytes calldata _config) external;

    function getConfig(
        uint16 _chainId,
        address _userApplication,
        uint _configType
    ) external view returns (bytes memory);
}