INNER CODE UNIT · Python
bech32_polymod
bee-san/pyWhat · pywhat/bitcoin.py:55
def bech32_polymod(values: Sequence[int]) -> int:
"""The checksum of Bech32 and Bech32m, a BCH code (BIP 173)."""
checksum = 1
for value in values:
top = checksum >> 25
checksum = (checksum & 0x1FFFFFF) << 5 ^ value
for i, generator in enumerate(BECH32_GENERATOR):
if (top >> i) & 1:
checksum ^= generator
return checksum
def bech32_hrp_expand(hrp: str) -> List[int]:
"""The human-readable part of Bech32 text, as checksummed (BIP 173)."""
return [ord(char) >> 5 for char in hrp] + [0] + [ord(char) & 31 for char in hrp]
def convert_bits(