function safeTransferFrom(
    address _asset,
    uint _amount
) internal returns (uint amount) {
    uint _startBal = iERC20(_asset).balanceOf(address(this));
    (bool success, bytes memory data) = _asset.call(
        abi.encodeWithSignature(
            "transferFrom(address,address,uint256)",
            msg.sender,
            address(this),
            _amount
        )
    );
    require(success && (data.length == 0 || abi.decode(data, (bool))));
    return (iERC20(_asset).balanceOf(address(this)) - _startBal);
}
function safeTransferFrom(
    address _asset,
    uint _amount
) internal returns (uint amount) {
    uint _startBal = iERC20(_asset).balanceOf(address(this));
    (bool success, bytes memory data) = _asset.call(
        abi.encodeWithSignature(
            "transferFrom(address,address,uint256)",
            msg.sender,
            address(this),
            _amount
        )
    );
    require(success && (data.length == 0 || abi.decode(data, (bool))), "Transfer failed");
    uint transferredAmount = iERC20(_asset).balanceOf(address(this)) - _startBal;
    require(transferredAmount >= _amount, "Transferred amount less than required");
    return transferredAmount;
}
return (iERC20(_asset).balanceOf(address(this)) - _startBal);
