.rehash()
.sha256
.hash_int
Note that we unfortunately can't use a scripted diff here, as the `sha256` symbol is also used for other instances (e.g. as function in hashlib, or in the `UTXO` class in p2p_segwit.py).
signrawtransactionwithkey
.calc_sha256()
.getwtxid()
wtxid_hex