function leverageDownInternal(
        uint256 amount,
        IUSDOBase.ILeverageSwapData memory swapData,
        IUSDOBase.ILeverageExternalContractsData memory externalData,
        IUSDOBase.ILeverageLZData memory lzData,
        address leverageFor
    ) public payable {
        _unwrap(address(this), amount);
function _unwrap(address _toAddress, uint256 _amount) private {
    _burn(msg.sender, _amount);

    if (erc20 == address(0)) {
        _safeTransferETH(_toAddress, _amount);
    } else {
        IERC20(erc20).safeTransfer(_toAddress, _amount);
    }
}
 if (!credited) {
    _creditTo(_srcChainId, address(this), amount);
    creditedPackets[_srcChainId][_srcAddress][_nonce] = true;
}
