tln: channel announcements - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
DIR Log
DIR Files
DIR Refs
DIR Submodules
---
DIR commit a10676046905818aad14bb829969dc8ed894671a
DIR parent 275f1e6cbc836c55a77de18143166781406244af
HTML Author: Janus <ysangkok@gmail.com>
Date: Mon, 18 Jun 2018 15:34:18 +0200
ln: channel announcements
Diffstat:
M lib/lnbase.py | 91 ++++++++++++++++++++++++++++++-
M lib/lnworker.py | 26 ++++++++++++--------------
2 files changed, 100 insertions(+), 17 deletions(-)
---
DIR diff --git a/lib/lnbase.py b/lib/lnbase.py
t@@ -4,15 +4,13 @@
Derived from https://gist.github.com/AdamISZ/046d05c156aaeb56cc897f85eecb3eb8
"""
-from ecdsa.util import sigdecode_der, sigencode_string_canonize
-from ecdsa import VerifyingKey
+from ecdsa.util import sigdecode_der, sigencode_string_canonize, sigdecode_string
from ecdsa.curves import SECP256k1
import queue
import traceback
import json
from collections import OrderedDict, defaultdict
import asyncio
-import sys
import os
import time
import binascii
t@@ -599,6 +597,8 @@ class Peer(PrintError):
self.revoke_and_ack = defaultdict(asyncio.Queue)
self.update_fulfill_htlc = defaultdict(asyncio.Queue)
self.commitment_signed = defaultdict(asyncio.Queue)
+ self.announcement_signatures = defaultdict(asyncio.Queue)
+ self.is_funding_six_deep = defaultdict(lambda: False)
self.localfeatures = (0x08 if request_initial_sync else 0)
self.nodes = {}
self.channels = lnworker.channels
t@@ -766,6 +766,10 @@ class Peer(PrintError):
self.channel_db.on_channel_announcement(payload)
self.channel_update_event.set()
+ def on_announcement_signatures(self, payload):
+ channel_id = payload['channel_id']
+ self.announcement_signatures[channel_id].put_nowait(payload)
+
@aiosafe
async def main_loop(self):
self.reader, self.writer = await asyncio.open_connection(self.host, self.port)
t@@ -835,6 +839,7 @@ class Peer(PrintError):
first_per_commitment_point=per_commitment_point_first,
to_self_delay=local_config.to_self_delay,
max_htlc_value_in_flight_msat=local_config.max_htlc_value_in_flight_msat,
+ channel_flags=0x01, # publicly announcing channel
channel_reserve_satoshis=10
)
self.send_message(msg)
t@@ -968,6 +973,49 @@ class Peer(PrintError):
if chan.short_channel_id:
self.mark_open(chan)
+ async def funding_six_deep(self, chan):
+ if self.is_funding_six_deep[chan.channel_id]:
+ return
+ self.is_funding_six_deep[chan.channel_id] = True
+ h, local_node_sig, local_bitcoin_sig = self.send_announcement_signatures(chan)
+ announcement_signatures_msg = await self.announcement_signatures[chan.channel_id].get()
+ remote_node_sig = announcement_signatures_msg["node_signature"]
+ remote_bitcoin_sig = announcement_signatures_msg["bitcoin_signature"]
+ if not ecc.verify_signature(chan.remote_config.multisig_key.pubkey, remote_bitcoin_sig, h):
+ raise Exception("bitcoin_sig invalid in announcement_signatures")
+ if not ecc.verify_signature(self.pubkey, remote_node_sig, h):
+ raise Exception("node_sig invalid in announcement_signatures")
+
+ node_sigs = [local_node_sig, remote_node_sig]
+ bitcoin_sigs = [local_bitcoin_sig, remote_bitcoin_sig]
+ node_ids = [privkey_to_pubkey(self.privkey), self.pubkey]
+ bitcoin_keys = [chan.local_config.multisig_key.pubkey, chan.remote_config.multisig_key.pubkey]
+
+ if node_ids[0] > node_ids[1]:
+ node_sigs.reverse()
+ bitcoin_sigs.reverse()
+ node_ids.reverse()
+ bitcoin_keys.reverse()
+
+ channel_announcement = gen_msg("channel_announcement",
+ node_signatures_1=node_sigs[0],
+ node_signatures_2=node_sigs[1],
+ bitcoin_signature_1=bitcoin_sigs[0],
+ bitcoin_signature_2=bitcoin_sigs[1],
+ len=0,
+ #features
+ chain_hash=bytes.fromhex(rev_hex(constants.net.GENESIS)),
+ short_channel_id=chan.short_channel_id,
+ node_id_1=node_ids[0],
+ node_id_2=node_ids[1],
+ bitcoin_key_1=bitcoin_keys[0],
+ bitcoin_key_2=bitcoin_keys[1]
+ )
+
+ self.send_message(channel_announcement)
+
+ print("SENT CHANNEL ANNOUNCEMENT")
+
def mark_open(self, chan):
if self.channel_state[chan.channel_id] == "OPEN":
return
t@@ -979,8 +1027,45 @@ class Peer(PrintError):
self.channel_db.on_channel_announcement({"short_channel_id": chan.short_channel_id, "node_id_1": sorted_keys[0], "node_id_2": sorted_keys[1]})
self.channel_db.on_channel_update({"short_channel_id": chan.short_channel_id, 'flags': b'\x01', 'cltv_expiry_delta': b'\x90', 'htlc_minimum_msat': b'\x03\xe8', 'fee_base_msat': b'\x03\xe8', 'fee_proportional_millionths': b'\x01'})
self.channel_db.on_channel_update({"short_channel_id": chan.short_channel_id, 'flags': b'\x00', 'cltv_expiry_delta': b'\x90', 'htlc_minimum_msat': b'\x03\xe8', 'fee_base_msat': b'\x03\xe8', 'fee_proportional_millionths': b'\x01'})
+
self.print_error("CHANNEL OPENING COMPLETED")
+ def send_announcement_signatures(self, chan):
+
+ bitcoin_keys = [chan.local_config.multisig_key.pubkey,
+ chan.remote_config.multisig_key.pubkey]
+
+ node_ids = [privkey_to_pubkey(self.privkey),
+ self.pubkey]
+
+ sorted_node_ids = list(sorted(node_ids))
+ if sorted_node_ids != node_ids:
+ node_ids = sorted_node_ids
+ bitcoin_keys.reverse()
+
+ chan_ann = gen_msg("channel_announcement",
+ len=0,
+ #features
+ chain_hash=bytes.fromhex(rev_hex(constants.net.GENESIS)),
+ short_channel_id=chan.short_channel_id,
+ node_id_1=node_ids[0],
+ node_id_2=node_ids[1],
+ bitcoin_key_1=bitcoin_keys[0],
+ bitcoin_key_2=bitcoin_keys[1]
+ )
+ to_hash = chan_ann[256+2:]
+ h = bitcoin.Hash(to_hash)
+ bitcoin_signature = ecc.ECPrivkey(chan.local_config.multisig_key.privkey).sign(h, sigencode_string_canonize, sigdecode_string)
+ node_signature = ecc.ECPrivkey(self.privkey).sign(h, sigencode_string_canonize, sigdecode_string)
+ self.send_message(gen_msg("announcement_signatures",
+ channel_id=chan.channel_id,
+ short_channel_id=chan.short_channel_id,
+ node_signature=node_signature,
+ bitcoin_signature=bitcoin_signature
+ ))
+
+ return h, node_signature, bitcoin_signature
+
def on_update_fail_htlc(self, payload):
print("UPDATE_FAIL_HTLC", decode_onion_error(payload["reason"], self.node_keys, self.secret_key))
DIR diff --git a/lib/lnworker.py b/lib/lnworker.py
t@@ -1,13 +1,8 @@
-import traceback
-import sys
import json
import binascii
import asyncio
-import time
import os
from decimal import Decimal
-import binascii
-import asyncio
import threading
from collections import defaultdict
t@@ -15,11 +10,7 @@ from . import constants
from .bitcoin import sha256, COIN
from .util import bh2u, bfh, PrintError
from .constants import set_testnet, set_simnet
-from .simple_config import SimpleConfig
-from .network import Network
-from .storage import WalletStorage
-from .wallet import Wallet
-from .lnbase import Peer, Outpoint, ChannelConfig, LocalState, RemoteState, Keypair, OnlyPubkeyKeypair, OpenChannel, ChannelConstraints, RevocationStore, aiosafe, calc_short_channel_id, privkey_to_pubkey
+from .lnbase import Peer, Outpoint, ChannelConfig, LocalState, RemoteState, Keypair, OnlyPubkeyKeypair, OpenChannel, ChannelConstraints, RevocationStore, calc_short_channel_id, privkey_to_pubkey
from .lightning_payencode.lnaddr import lnencode, LnAddr, lndecode
from . import lnrouter
from .ecc import ECPrivkey
t@@ -142,7 +133,7 @@ class LNWorker(PrintError):
If the Funding TX has not been mined, return None
"""
- assert self.channel_state[chan.channel_id] == "OPENING"
+ assert self.channel_state[chan.channel_id] in ["OPEN", "OPENING"]
peer = self.peers[chan.node_id]
conf = self.wallet.get_tx_height(chan.funding_outpoint.txid)[1]
if conf >= chan.constraints.funding_txn_minimum_depth:
t@@ -153,14 +144,21 @@ class LNWorker(PrintError):
return None
chan = chan._replace(short_channel_id = calc_short_channel_id(block_height, tx_pos, chan.funding_outpoint.output_index))
self.save_channel(chan)
- return chan
- return None
+ return chan, conf
+ return None, None
def on_network_update(self, event, *args):
for chan in self.channels.values():
+ if self.channel_state[chan.channel_id] == "OPEN":
+ conf = self.wallet.get_tx_height(chan.funding_outpoint.txid)[1]
+ if conf >= 6:
+ peer = self.peers[chan.node_id]
+ coro = peer.funding_six_deep(chan)
+ fut = asyncio.run_coroutine_threadsafe(coro, self.network.asyncio_loop)
+ fut.result()
if self.channel_state[chan.channel_id] != "OPENING":
continue
- chan = self.save_short_chan_id(chan)
+ chan, conf = self.save_short_chan_id(chan)
if not chan:
self.print_error("network update but funding tx is still not at sufficient depth")
continue