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ln: avoid code duplication

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This commit is contained in:
Janus
2018-06-28 16:04:25 +02:00
committed by ThomasV
parent fe973a5137
commit 4515c859c4
2 changed files with 4 additions and 4 deletions
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4
lib/lnutil.py
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@@ -3,7 +3,7 @@ from .crypto import sha256
import json
from collections import namedtuple
from .transaction import Transaction
from .ecc import CURVE_ORDER, generator, sig_string_from_der_sig, ECPubkey, string_to_number
from .ecc import CURVE_ORDER, sig_string_from_der_sig, ECPubkey, string_to_number
from . import ecc, bitcoin, crypto, transaction
from .transaction import opcodes
from .bitcoin import push_script
@@ -86,7 +86,7 @@ def derive_pubkey(basepoint, per_commitment_point):
def derive_privkey(secret, per_commitment_point):
assert type(secret) is int
basepoint = (ecc.generator() * secret).get_public_key_bytes()
basepoint = secret_to_pubkey(secret)
basepoint = secret + ecc.string_to_number(sha256(per_commitment_point + basepoint))
basepoint %= CURVE_ORDER
return basepoint