tlnbase: fix multi-hop payments - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
DIR Log
DIR Files
DIR Refs
DIR Submodules
---
DIR commit eeb027babcfa7ddc9dc14af8f4d9be1f56a382ad
DIR parent 001ab4e3bc9e597af49f68e297b679c6df35b9ee
HTML Author: Janus <ysangkok@gmail.com>
Date: Tue, 22 May 2018 13:45:03 +0200
lnbase: fix multi-hop payments
Diffstat:
M lib/lnbase.py | 39 ++++++++++++++++++-------------
1 file changed, 23 insertions(+), 16 deletions(-)
---
DIR diff --git a/lib/lnbase.py b/lib/lnbase.py
t@@ -34,7 +34,6 @@ from .util import PrintError, bh2u, print_error, bfh, profiler, xor_bytes
from .transaction import opcodes, Transaction
from collections import namedtuple, defaultdict
-import decimal
# hardcoded nodes
node_list = [
t@@ -569,8 +568,6 @@ def is_synced(network):
synced = server_height != 0 and network.is_up_to_date() and local_height >= server_height
return synced
-msat_to_sat_round_up = lambda amount_msat: int((decimal.Decimal(amount_msat) / 1000).to_integral_value(rounding=decimal.ROUND_UP))
-
class Peer(PrintError):
def __init__(self, host, port, pubkey, privkey, request_initial_sync=False, network=None):
self.update_add_htlc_event = asyncio.Event()
t@@ -966,6 +963,11 @@ class Peer(PrintError):
async def reestablish_channel(self, chan):
await self.initialized
+ self.send_message(gen_msg("channel_reestablish",
+ channel_id=chan.channel_id,
+ next_local_commitment_number=chan.local_state.ctn+1,
+ next_remote_revocation_number=chan.remote_state.ctn
+ ))
channel_reestablish_msg = await self.channel_reestablish[chan.channel_id]
print(channel_reestablish_msg)
# {
t@@ -985,11 +987,6 @@ class Peer(PrintError):
if channel_reestablish_msg["my_current_per_commitment_point"] != chan.remote_state.last_per_commitment_point:
raise Exception("Remote PCP mismatch")
- self.send_message(gen_msg("channel_reestablish",
- channel_id=chan.channel_id,
- next_local_commitment_number=chan.local_state.ctn+1,
- next_remote_revocation_number=chan.remote_state.ctn
- ))
return chan
t@@ -1093,16 +1090,27 @@ class Peer(PrintError):
for idx, route_edge in enumerate(route[1:]):
hops_data += [OnionHopsDataSingle(OnionPerHop(route_edge.short_channel_id, amount_msat.to_bytes(8, "big"), computed_cltv_expiry.to_bytes(4, "big")))]
total_fee += route_edge.channel_policy.fee_base_msat + ( amount_msat * route_edge.channel_policy.fee_proportional_millionths // 1000000 )
- hops_data += [OnionHopsDataSingle(OnionPerHop(b"\x00"*8, amount_msat.to_bytes(8, "big"), (computed_cltv_expiry + next_hop_cltv_expiry).to_bytes(4, "big")))]
associated_data = payment_hash
self.secret_key = os.urandom(32)
self.node_keys = [x.node_id for x in route]
+
+ if next_hop_cltv_expiry == 0:
+ computed_cltv_expiry = height + chan.remote_config.to_self_delay
+ hops_data += [OnionHopsDataSingle(OnionPerHop(b"\x00"*8, amount_msat.to_bytes(8, "big"), (computed_cltv_expiry).to_bytes(4, "big")))]
+ cltv_expiry = computed_cltv_expiry
+ else:
+ hops_data += [OnionHopsDataSingle(OnionPerHop(b"\x00"*8, amount_msat.to_bytes(8, "big"), (computed_cltv_expiry).to_bytes(4, "big")))]
+ cltv_expiry = computed_cltv_expiry + chan.remote_config.to_self_delay # TODO use min_final_cltv_expiry
+
onion = new_onion_packet(self.node_keys, self.secret_key, hops_data, associated_data)
- cltv_expiry = computed_cltv_expiry + chan.remote_config.to_self_delay # TODO use min_final_cltv_expiry
+ msat_local = (chan.local_state.amount_sat * 1000) - amount_msat - total_fee
+ sat_local = msat_local // 1000
+
+ msat_remote = (chan.remote_state.amount_sat * 1000) + amount_msat + total_fee
+ sat_remote = msat_remote // 1000
amount_msat += total_fee
- sat = msat_to_sat_round_up(amount_msat)
self.send_message(gen_msg("update_add_htlc", channel_id=chan.channel_id, id=chan.local_state.next_htlc_id, cltv_expiry=cltv_expiry, amount_msat=amount_msat, payment_hash=payment_hash, onion_routing_packet=onion.to_bytes()))
t@@ -1115,9 +1123,8 @@ class Peer(PrintError):
# TODO check payment_hash
revocation_pubkey = derive_blinded_pubkey(chan.local_config.revocation_basepoint.pubkey, chan.remote_state.next_per_commitment_point)
htlcs_in_remote = [(make_received_htlc(revocation_pubkey, their_remote_htlc_pubkey, their_local_htlc_pubkey, payment_hash, cltv_expiry), amount_msat)]
- new_local = chan.local_state.amount_sat - sat
remote_ctx = make_commitment_using_open_channel(chan, chan.remote_state.ctn + 1, False, chan.remote_state.next_per_commitment_point,
- chan.remote_state.amount_sat, new_local, htlcs_in_remote)
+ chan.remote_state.amount_sat, sat_local, htlcs_in_remote)
sig_64 = sign_and_get_sig_string(remote_ctx, chan.local_config, chan.remote_config)
htlc_tx = make_htlc_tx_with_open_channel(chan, chan.remote_state.next_per_commitment_point, False, False, amount_msat, cltv_expiry, payment_hash, remote_ctx, 0)
t@@ -1164,7 +1171,7 @@ class Peer(PrintError):
next_per_commitment_point = revoke_and_ack_msg["next_per_commitment_point"]
bare_ctx = make_commitment_using_open_channel(chan, chan.remote_state.ctn + 2, False, next_per_commitment_point,
- chan.remote_state.amount_sat + sat, chan.local_state.amount_sat - sat)
+ sat_remote, sat_local)
sig_64 = sign_and_get_sig_string(bare_ctx, chan.local_config, chan.remote_config)
t@@ -1178,7 +1185,7 @@ class Peer(PrintError):
return chan._replace(
local_state=chan.local_state._replace(
- amount_sat=chan.local_state.amount_sat - sat,
+ amount_sat=sat_local,
next_htlc_id=chan.local_state.next_htlc_id + 1
),
remote_state=chan.remote_state._replace(
t@@ -1186,7 +1193,7 @@ class Peer(PrintError):
revocation_store=their_revstore,
last_per_commitment_point=next_per_commitment_point,
next_per_commitment_point=revoke_and_ack_msg["next_per_commitment_point"],
- amount_sat=chan.remote_state.amount_sat + sat
+ amount_sat=sat_remote
)
)