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BIP 341: add missing conversions between bytes and int

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Convert seckey0 to bytes at the start of the function.
Return the output as bytes for consistency with the rest of the code.
This commit is contained in:
Darius Parvin 2022-09-28 15:06:32 -07:00
parent 52f68fecd8
commit 3cdfe1bd16
1 changed files with 4 additions and 3 deletions
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5
bip-0341.mediawiki
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@ -186,12 +186,13 @@ def taproot_tweak_pubkey(pubkey, h):
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):
P = point_mul(G, int_from_bytes(seckey0)) seckey0 = int_from_bytes(seckey0)
P = point_mul(G, seckey0)
seckey = seckey0 if has_even_y(P) else SECP256K1_ORDER - seckey0 seckey = seckey0 if has_even_y(P) else SECP256K1_ORDER - seckey0
t = int_from_bytes(tagged_hash("TapTweak", bytes_from_int(x(P)) + h)) t = int_from_bytes(tagged_hash("TapTweak", bytes_from_int(x(P)) + h))
if t >= SECP256K1_ORDER: if t >= SECP256K1_ORDER:
raise ValueError raise ValueError
return (seckey + t) % SECP256K1_ORDER return bytes_from_int((seckey + t) % SECP256K1_ORDER)
</source> </source>
The following function, <code>taproot_output_script</code>, returns a byte array with the scriptPubKey (see [[bip-0141.mediawiki|BIP141]]). The following function, <code>taproot_output_script</code>, returns a byte array with the scriptPubKey (see [[bip-0141.mediawiki|BIP141]]).