Allow sending BTC to oneself (for CPFP when stuck in mempool)

[Jpja]

CW does not allow an address to make a pure BTC send to itself.

With users having more control over fees, there will inevitably come support tickets where transactions are stuck in mempool due to too low fees. The easiest solution is to make a pure BTC transaction to oneself with a higher fee (aka Child Pays For Parent).

Sending to oneself is the most efficient as it only takes one output.

[deweller]

I don't believe counterwallet spends unconfirmed outputs, so the child-pays-for-parent benefit wouldn't pply here.

To really solve the stuck transactions we would need a more complex solution.

[Jpja]

Just tested it. CW does spend unconfirmed outputs.