// SPDX-License-Identifier: MIT

pragma solidity 0.8.20;

import "@mapprotocol/protocol/contracts/lib/RLPReader.sol";
import "@mapprotocol/protocol/contracts/utils/Utils.sol";
import "../interface/IEvent.sol";

library NearDecoder {
    using RLPReader for bytes;
    using RLPReader for RLPReader.RLPItem;

    bytes32 constant NEAR_TRANSFEROUT = 0x4e87426fdd31a6df84975ed344b2c3fbd45109085f1557dff1156b300f135df8;
    bytes32 constant NEAR_DEPOSITOUT = 0x3ad224e3e42a516df08d1fca74990eac30205afb5287a46132a6975ce0b2cede;

    function decodeNearLog(
        bytes memory logsHash
    ) internal pure returns (bytes memory executorId, IEvent.transferOutEvent[] memory _outEvents) {
        RLPReader.RLPItem[] memory ls = logsHash.toRlpItem().toList();

        require(ls.length >= 2, "logsHash length to low");

        executorId = ls[0].toBytes();

        bytes[] memory logs = new bytes[](ls[1].toList().length);
        for (uint256 i = 0; i < ls[1].toList().length; i++) {
            logs[i] = ls[1].toList()[i].toBytes();
        }
        bytes memory log;

        _outEvents = new IEvent.transferOutEvent[](logs.length);
        for (uint256 i = 0; i < logs.length; i++) {
            bytes memory temp = Utils.splitExtra(logs[i]);
            if (keccak256(temp) == NEAR_TRANSFEROUT) {
                log = Utils.hexStrToBytes(logs[i]);
                RLPReader.RLPItem[] memory logList = log.toRlpItem().toList();

                require(logList.length >= 8, "logsHash length to low");

                IEvent.transferOutEvent memory _outEvent = IEvent.transferOutEvent({
                    fromChain: logList[0].toUint(),
                    toChain: logList[1].toUint(),
                    orderId: bytes32(logList[2].toBytes()),
                    token: logList[3].toBytes(),
                    from: logList[4].toBytes(),
                    to: logList[5].toBytes(),
                    amount: logList[6].toUint(),
                    toChainToken: logList[7].toBytes()
                });
                _outEvents[i] = _outEvent;
            }
        }
    }
}