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BIP-0350: use bech32m for witness version 1+ addresses

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We have supported sending to any witness version since Electrum 3.0, using
addresses as specified in BIP-0173 (bech32 encoding).
BIP-0350 makes a breaking change in address encoding, and recommends using
(and using only) a new encoding (bech32m) for sending to witness version 1
and later. The address encoding for currently in use witness v0 addresses
remains the same, as in BIP-0173; following the BIP-0350 spec.

closes https://github.com/spesmilo/electrum/issues/6949

related:
cd3885c0fb/bip-0350.mediawiki
https://github.com/bitcoin/bitcoin/pull/20861
This commit is contained in:
SomberNight
2021-03-17 18:11:55 +01:00
parent 468636eae0
commit 4315fa4371
8 changed files with 216 additions and 77 deletions
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8
electrum/lnutil.py
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@@ -1165,7 +1165,13 @@ class LNPeerAddr:
def get_compressed_pubkey_from_bech32(bech32_pubkey: str) -> bytes:
hrp, data_5bits = segwit_addr.bech32_decode(bech32_pubkey)
decoded_bech32 = segwit_addr.bech32_decode(bech32_pubkey)
hrp = decoded_bech32.hrp
data_5bits = decoded_bech32.data
if decoded_bech32.encoding is None:
raise ValueError("Bad bech32 checksum")
if decoded_bech32.encoding != segwit_addr.Encoding.BECH32:
raise ValueError("Bad bech32 encoding: must be using vanilla BECH32")
if hrp != 'ln':
raise Exception('unexpected hrp: {}'.format(hrp))
data_8bits = segwit_addr.convertbits(data_5bits, 5, 8, False)