electrum

Electrum Bitcoin wallet
git clone https://git.parazyd.org/electrum
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commit 38d2d4c32165ee9014bd32e7e26f34b6bf05f7e5
parent 1f1207ecbe1c075028527e2adf73ecac8799480a
Author: Janus <ysangkok@gmail.com>
Date:   Thu, 24 Jan 2019 17:19:08 +0100

lnchan: fix per_commitment_point number in verify_htlc

Diffstat:
Melectrum/lnchan.py | 9++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/electrum/lnchan.py b/electrum/lnchan.py @@ -354,15 +354,18 @@ class Channel(PrintError): self.set_local_commitment(pending_local_commitment) def verify_htlc(self, htlc: UpdateAddHtlc, htlc_sigs: Sequence[bytes], we_receive: bool, ctx) -> int: - _, this_point, _, _ = self.points() + ctn = extract_ctn_from_tx_and_chan(ctx, self) + secret = get_per_commitment_secret_from_seed(self.config[LOCAL].per_commitment_secret_seed, RevocationStore.START_INDEX - ctn) + point = secret_to_pubkey(int.from_bytes(secret, 'big')) + _script, htlc_tx = make_htlc_tx_with_open_channel(chan=self, - pcp=this_point, + pcp=point, for_us=True, we_receive=we_receive, commit=ctx, htlc=htlc) pre_hash = sha256d(bfh(htlc_tx.serialize_preimage(0))) - remote_htlc_pubkey = derive_pubkey(self.config[REMOTE].htlc_basepoint.pubkey, this_point) + remote_htlc_pubkey = derive_pubkey(self.config[REMOTE].htlc_basepoint.pubkey, point) for idx, sig in enumerate(htlc_sigs): if ecc.verify_signature(remote_htlc_pubkey, sig, pre_hash): return idx