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plm-lottery/app/electrum/scripthash.py
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import hashlib
from embit.script import Script
def address_to_scripthash(address: str) -> str:
"""Electrum protocol scripthash: sha256(scriptPubKey), byte-reversed, hex.
Uses `.data` (the raw scriptPubKey bytes), not `.serialize()` — the latter
prefixes a compact-size length byte meant for embedding the script as pushdata
elsewhere (e.g. a P2SH redeemScript), which is not part of the actual on-chain
output script and produces a wrong (unmatchable) scripthash if used here.
"""
script_pubkey = Script.from_address(address).data
return hashlib.sha256(script_pubkey).digest()[::-1].hex()