The company that is claiming they are going to send the bitcoin is stating that I need to transfer 0.598647 BTC in order to receive 12.4 BTC.  They are using Lightning Network.  This is what they have stated:

"Required Minimum Hash Power on Reflection ID: 0.598647 BTC"

They say once I pay the 0.598647 BTC I will receive the 12.4 BTC and that the 0.598647 BTC will be refunded.  I have no idea what they mean by "Hash Power on Reflection ID" and why the fee is so large.