fa188c9c59 test: Use MiniWalet in p2p_feefilter (MarcoFalke)
fa39c62eb7 test: inline hashToHex (MarcoFalke)
Pull request description:
This introduces a minimalistic test wallet, which can be used as a drop in replacement for the Bitcoin Core wallet to create dummy transactions with a given fee rate.
ACKs for top commit:
jnewbery:
utACK fa188c9c59
Tree-SHA512: 0aad9cb14eea4f0055bd6a47cc8c8f82a16941b152598c3bf1e083aae84cca4ffa23f0b854a362a68be1b917deba1b5ec7c0207b63b0805d747ba9a7d1d82efe