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Merge pull request #1386 from jonasnick/fix-taproot-tweak-pubkey

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BIP 341: Fix taproot_tweak_pubkey
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kallewoof 2023-01-04 10:33:15 +09:00 committed by GitHub
commit c6725580c5
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1 changed files with 4 additions and 1 deletions
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@ -182,7 +182,10 @@ def taproot_tweak_pubkey(pubkey, h):
t = int_from_bytes(tagged_hash("TapTweak", pubkey + h)) t = int_from_bytes(tagged_hash("TapTweak", pubkey + h))
if t >= SECP256K1_ORDER: if t >= SECP256K1_ORDER:
raise ValueError raise ValueError
Q = point_add(lift_x(int(pubkey)), point_mul(G, t)) P = lift_x(int_from_bytes(pubkey))
if P is None:
raise ValueError
Q = point_add(P, point_mul(G, t))
return 0 if has_even_y(Q) else 1, bytes_from_int(x(Q)) return 0 if has_even_y(Q) else 1, bytes_from_int(x(Q))
def taproot_tweak_seckey(seckey0, h): def taproot_tweak_seckey(seckey0, h):