fix: use remote_per_commitment_point

lib/lnbase.py

@@ -684,6 +684,7 @@ class Peer(PrintError):
             payload = await self.channel_accepted[temp_channel_id]
         finally:
             del self.channel_accepted[temp_channel_id]
+        remote_per_commitment_point = payload['first_per_commitment_point']
         remote_funding_pubkey = payload["funding_pubkey"]
         pubkeys = sorted([bh2u(funding_pubkey), bh2u(remote_funding_pubkey)])
         redeem_script = transaction.multisig_script(pubkeys, 2)
@@ -699,13 +700,12 @@ class Peer(PrintError):
         self.print_error('revocation_pubkey', binascii.hexlify(revocation_pubkey))
         local_delayedpubkey = derive_pubkey(delayed_payment_basepoint, per_commitment_point)
         self.print_error('local_delayedpubkey', binascii.hexlify(local_delayedpubkey))
-        remotepubkey = derive_pubkey(remote_payment_basepoint, per_commitment_point)
+        remotepubkey = derive_pubkey(remote_payment_basepoint, remote_per_commitment_point)
         self.print_error('remotepubkey', binascii.hexlify(remotepubkey))
         ctn = 0
         c_tx = make_commitment(
             ctn,
-            funding_pubkey, remote_funding_pubkey,
-            remotepubkey,
+            funding_pubkey, remote_funding_pubkey, remotepubkey,
             base_point, remote_payment_basepoint,
             revocation_pubkey, local_delayedpubkey,
             funding_tx.txid(), funding_index, funding_satoshis,

lib/tests/test_lnbase.py

@@ -175,6 +175,7 @@ class Test_LNBase(unittest.TestCase):
         # BOLT3, Appendix E
         base_secret = 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
         per_commitment_secret = 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100
+        revocation_basepoint_secret = 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
         base_point = secret_to_pubkey(base_secret)
         self.assertEqual(base_point, bfh('036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2'))
         per_commitment_point = secret_to_pubkey(per_commitment_secret)
@@ -183,7 +184,6 @@ class Test_LNBase(unittest.TestCase):
         self.assertEqual(localpubkey, bfh('0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5'))
         localprivkey = derive_privkey(base_secret, per_commitment_point)
         self.assertEqual(localprivkey, 0xcbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f)
-        revocation_basepoint_secret = 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
         revocation_basepoint = secret_to_pubkey(revocation_basepoint_secret)
         self.assertEqual(revocation_basepoint, bfh('036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2'))
         revocationpubkey = derive_blinded_pubkey(revocation_basepoint, per_commitment_point)