Fallback Fee

[orkunkilic]

Current implementation uses 1 sat/vbyte fee if it fails to get fee_rate from node. This occurs a lot on regtest. We need to find proper fallback fee or smarter estimation mechanism.

[eyusufatik]

One thing that came to my mind is to use %x more of the avg. of last n operations.

You get to have a "decent" fee rate but still be somewhat protected against fee rate spikes.