tlnwatcher rebased - electrum - Electrum Bitcoin wallet
(HTM) git clone https://git.parazyd.org/electrum
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) Submodules
---
(DIR) commit 261fefb6f3b426940a865562dc9c67942ada25b8
(DIR) parent 3eabd70df59dc43e6f627198a6530ffe90f26766
(HTM) Author: Janus <ysangkok@gmail.com>
Date: Wed, 12 Sep 2018 16:17:10 +0200
lnwatcher rebased
Diffstat:
M electrum/address_synchronizer.py | 14 ++++++++++----
M electrum/daemon.py | 2 ++
M electrum/lnbase.py | 13 +++++++++++--
M electrum/lnhtlc.py | 48 ++++++++++++++++++++++++++------
M electrum/lnutil.py | 23 ++++++++++++++++++-----
M electrum/lnwatcher.py | 578 +++++++++++++++++++------------
M electrum/lnworker.py | 31 ++++++++++++++++---------------
M electrum/tests/test_lnhtlc.py | 3 ++-
8 files changed, 452 insertions(+), 260 deletions(-)
---
(DIR) diff --git a/electrum/address_synchronizer.py b/electrum/address_synchronizer.py
t@@ -94,6 +94,9 @@ class AddressSynchronizer(Logger):
self.load_unverified_transactions()
self.remove_local_transactions_we_dont_have()
+ def synchronize(self):
+ pass
+
def is_mine(self, address):
return self.db.is_addr_in_history(address)
t@@ -173,11 +176,13 @@ class AddressSynchronizer(Logger):
if self.synchronizer:
self.synchronizer.add(address)
- def get_conflicting_transactions(self, tx_hash, tx):
+ def get_conflicting_transactions(self, tx_hash, tx, include_self=False):
"""Returns a set of transaction hashes from the wallet history that are
directly conflicting with tx, i.e. they have common outpoints being
- spent with tx. If the tx is already in wallet history, that will not be
- reported as a conflict.
+ spent with tx.
+
+ include_self specifies whether the tx itself should be reported as a
+ conflict (if already in wallet history)
"""
conflicting_txns = set()
with self.transaction_lock:
t@@ -197,7 +202,8 @@ class AddressSynchronizer(Logger):
# this tx is already in history, so it conflicts with itself
if len(conflicting_txns) > 1:
raise Exception('Found conflicting transactions already in wallet history.')
- conflicting_txns -= {tx_hash}
+ if not include_self:
+ conflicting_txns -= {tx_hash}
return conflicting_txns
def add_transaction(self, tx_hash, tx, allow_unrelated=False):
(DIR) diff --git a/electrum/daemon.py b/electrum/daemon.py
t@@ -45,6 +45,7 @@ from .simple_config import SimpleConfig
from .exchange_rate import FxThread
from .plugin import run_hook
from .logging import get_logger
+from .lnworker import LNWorker
_logger = get_logger(__name__)
t@@ -260,6 +261,7 @@ class Daemon(DaemonThread):
return
wallet = Wallet(storage)
wallet.start_network(self.network)
+ wallet.lnworker = LNWorker(wallet, self.network)
self.wallets[path] = wallet
return wallet
(DIR) diff --git a/electrum/lnbase.py b/electrum/lnbase.py
t@@ -277,6 +277,7 @@ class Peer(PrintError):
self.lnworker = lnworker
self.privkey = lnworker.privkey
self.network = lnworker.network
+ self.lnwatcher = lnworker.network.lnwatcher
self.channel_db = lnworker.network.channel_db
self.read_buffer = b''
self.ping_time = 0
t@@ -472,7 +473,7 @@ class Peer(PrintError):
self.network.trigger_callback('channel', chan)
@aiosafe
- async def channel_establishment_flow(self, wallet, config, password, funding_sat, push_msat, temp_channel_id):
+ async def channel_establishment_flow(self, wallet, config, password, funding_sat, push_msat, temp_channel_id, sweep_address):
await self.initialized
# see lnd/keychain/derivation.go
keyfamilymultisig = 0
t@@ -583,9 +584,12 @@ class Peer(PrintError):
current_htlc_signatures = None,
feerate=local_feerate
),
- "constraints": ChannelConstraints(capacity=funding_sat, is_initiator=True, funding_txn_minimum_depth=funding_txn_minimum_depth)
+ "constraints": ChannelConstraints(capacity=funding_sat, is_initiator=True, funding_txn_minimum_depth=funding_txn_minimum_depth),
+ "remote_commitment_to_be_revoked": None,
}
m = HTLCStateMachine(chan)
+ m.lnwatcher = self.lnwatcher
+ m.sweep_address = sweep_address
sig_64, _ = m.sign_next_commitment()
self.send_message(gen_msg("funding_created",
temporary_channel_id=temp_channel_id,
t@@ -599,6 +603,7 @@ class Peer(PrintError):
# broadcast funding tx
success, _txid = await self.network.broadcast_transaction(funding_tx)
assert success, success
+ m.remote_commitment_to_be_revoked = m.pending_remote_commitment
m.remote_state = m.remote_state._replace(ctn=0)
m.local_state = m.local_state._replace(ctn=0, current_commitment_signature=remote_sig)
m.set_state('OPENING')
t@@ -890,8 +895,10 @@ class Peer(PrintError):
chan.receive_htlc_settle(preimage, int.from_bytes(update_fulfill_htlc_msg["id"], "big"))
await self.receive_commitment(chan)
self.revoke(chan)
+ # FIXME why is this not using the HTLC state machine?
bare_ctx = chan.make_commitment(chan.remote_state.ctn + 1, False, chan.remote_state.next_per_commitment_point,
msat_remote, msat_local)
+ self.lnwatcher.process_new_offchain_ctx(chan, bare_ctx, ours=False)
sig_64 = sign_and_get_sig_string(bare_ctx, chan.local_config, chan.remote_config)
res = bh2u(preimage)
payment_succeeded = True
t@@ -958,8 +965,10 @@ class Peer(PrintError):
self.send_message(gen_msg("update_fulfill_htlc", channel_id=channel_id, id=htlc_id, payment_preimage=payment_preimage))
# remote commitment transaction without htlcs
+ # FIXME why is this not using the HTLC state machine?
bare_ctx = chan.make_commitment(chan.remote_state.ctn + 1, False, chan.remote_state.next_per_commitment_point,
chan.remote_state.amount_msat - expected_received_msat, chan.local_state.amount_msat + expected_received_msat)
+ self.lnwatcher.process_new_offchain_ctx(chan, bare_ctx, ours=False)
sig_64 = sign_and_get_sig_string(bare_ctx, chan.local_config, chan.remote_config)
self.send_message(gen_msg("commitment_signed", channel_id=channel_id, signature=sig_64, num_htlcs=0))
(DIR) diff --git a/electrum/lnhtlc.py b/electrum/lnhtlc.py
t@@ -2,6 +2,7 @@
from collections import namedtuple
import binascii
import json
+
from .util import bfh, PrintError, bh2u
from .bitcoin import Hash
from .bitcoin import redeem_script_to_address
t@@ -13,7 +14,9 @@ from .lnutil import secret_to_pubkey, derive_privkey, derive_pubkey, derive_blin
from .lnutil import sign_and_get_sig_string
from .lnutil import make_htlc_tx_with_open_channel, make_commitment, make_received_htlc, make_offered_htlc
from .lnutil import HTLC_TIMEOUT_WEIGHT, HTLC_SUCCESS_WEIGHT
-from .lnutil import funding_output_script
+from .lnutil import funding_output_script, extract_ctn_from_tx_and_chan
+from .transaction import Transaction
+
SettleHtlc = namedtuple("SettleHtlc", ["htlc_id"])
RevokeAndAck = namedtuple("RevokeAndAck", ["per_commitment_secret", "next_per_commitment_point"])
t@@ -126,6 +129,11 @@ class HTLCStateMachine(PrintError):
self.node_id = maybeDecode("node_id", state["node_id"]) if type(state["node_id"]) is not bytes else state["node_id"]
self.short_channel_id = maybeDecode("short_channel_id", state["short_channel_id"]) if type(state["short_channel_id"]) is not bytes else state["short_channel_id"]
+ # FIXME this is a tx serialised in the custom electrum partial tx format.
+ # we should not persist txns in this format. we should persist htlcs, and be able to derive
+ # any past commitment transaction and use that instead; until then...
+ self.remote_commitment_to_be_revoked = Transaction(state["remote_commitment_to_be_revoked"])
+
self.local_update_log = []
self.remote_update_log = []
t@@ -141,6 +149,8 @@ class HTLCStateMachine(PrintError):
self._is_funding_txo_spent = None # "don't know"
self.set_state('DISCONNECTED')
+ self.lnwatcher = None
+
def set_state(self, state: str):
self._state = state
t@@ -203,7 +213,8 @@ class HTLCStateMachine(PrintError):
if htlc.l_locked_in is None: htlc.l_locked_in = self.local_state.ctn
self.print_error("sign_next_commitment")
- sig_64 = sign_and_get_sig_string(self.pending_remote_commitment, self.local_config, self.remote_config)
+ pending_remote_commitment = self.pending_remote_commitment
+ sig_64 = sign_and_get_sig_string(pending_remote_commitment, self.local_config, self.remote_config)
their_remote_htlc_privkey_number = derive_privkey(
int.from_bytes(self.local_config.htlc_basepoint.privkey, 'big'),
t@@ -224,7 +235,7 @@ class HTLCStateMachine(PrintError):
print("value too small, skipping. htlc amt: {}, weight: {}, remote feerate {}, remote dust limit {}".format( htlc.amount_msat, weight, feerate, self.remote_config.dust_limit_sat))
continue
original_htlc_output_index = 0
- args = [self.remote_state.next_per_commitment_point, for_us, we_receive, htlc.amount_msat, htlc.cltv_expiry, htlc.payment_hash, self.pending_remote_commitment, original_htlc_output_index]
+ args = [self.remote_state.next_per_commitment_point, for_us, we_receive, htlc.amount_msat, htlc.cltv_expiry, htlc.payment_hash, pending_remote_commitment, original_htlc_output_index]
htlc_tx = make_htlc_tx_with_open_channel(self, *args)
sig = bfh(htlc_tx.sign_txin(0, their_remote_htlc_privkey))
htlc_sig = ecc.sig_string_from_der_sig(sig[:-1])
t@@ -236,6 +247,9 @@ class HTLCStateMachine(PrintError):
if self.constraints.is_initiator and (self.pending_fee.progress & FUNDEE_ACKED):
self.pending_fee.progress |= FUNDER_SIGNED
+ if self.lnwatcher:
+ self.lnwatcher.process_new_offchain_ctx(self, pending_remote_commitment, ours=False)
+
return sig_64, htlcsigs
def receive_new_commitment(self, sig, htlc_sigs):
t@@ -256,20 +270,21 @@ class HTLCStateMachine(PrintError):
if htlc.r_locked_in is None: htlc.r_locked_in = self.remote_state.ctn
assert len(htlc_sigs) == 0 or type(htlc_sigs[0]) is bytes
- preimage_hex = self.pending_local_commitment.serialize_preimage(0)
+ pending_local_commitment = self.pending_local_commitment
+ preimage_hex = pending_local_commitment.serialize_preimage(0)
pre_hash = Hash(bfh(preimage_hex))
if not ecc.verify_signature(self.remote_config.multisig_key.pubkey, sig, pre_hash):
raise Exception('failed verifying signature of our updated commitment transaction: ' + bh2u(sig) + ' preimage is ' + preimage_hex)
_, this_point, _ = self.points
- if len(self.htlcs_in_remote) > 0 and len(self.pending_local_commitment.outputs()) == 3:
+ if len(self.htlcs_in_remote) > 0 and len(pending_local_commitment.outputs()) == 3:
print("CHECKING HTLC SIGS")
we_receive = True
payment_hash = self.htlcs_in_remote[0].payment_hash
amount_msat = self.htlcs_in_remote[0].amount_msat
cltv_expiry = self.htlcs_in_remote[0].cltv_expiry
- htlc_tx = make_htlc_tx_with_open_channel(self, this_point, True, we_receive, amount_msat, cltv_expiry, payment_hash, self.pending_local_commitment, 0)
+ htlc_tx = make_htlc_tx_with_open_channel(self, this_point, True, we_receive, amount_msat, cltv_expiry, payment_hash, pending_local_commitment, 0)
pre_hash = Hash(bfh(htlc_tx.serialize_preimage(0)))
remote_htlc_pubkey = derive_pubkey(self.remote_config.htlc_basepoint.pubkey, this_point)
if not ecc.verify_signature(remote_htlc_pubkey, htlc_sigs[0], pre_hash):
t@@ -283,6 +298,9 @@ class HTLCStateMachine(PrintError):
if self.constraints.is_initiator and (self.pending_fee.progress & FUNDEE_ACKED):
self.pending_fee.progress |= FUNDER_SIGNED
+ if self.lnwatcher:
+ self.lnwatcher.process_new_offchain_ctx(self, pending_local_commitment, ours=True)
+
def revoke_current_commitment(self):
"""
t@@ -350,6 +368,20 @@ class HTLCStateMachine(PrintError):
"""
self.print_error("receive_revocation")
+ cur_point = self.remote_state.current_per_commitment_point
+ derived_point = ecc.ECPrivkey(revocation.per_commitment_secret).get_public_key_bytes(compressed=True)
+ if cur_point != derived_point:
+ raise Exception('revoked secret not for current point')
+
+ # FIXME not sure this is correct... but it seems to work
+ # if there are update_add_htlc msgs between commitment_signed and rev_ack,
+ # this might break
+ prev_remote_commitment = self.pending_remote_commitment
+
+ self.remote_state.revocation_store.add_next_entry(revocation.per_commitment_secret)
+ if self.lnwatcher:
+ self.lnwatcher.process_new_revocation_secret(self, revocation.per_commitment_secret)
+
settle_fails2 = []
for x in self.remote_update_log:
if type(x) is not SettleHtlc:
t@@ -386,8 +418,6 @@ class HTLCStateMachine(PrintError):
self.total_msat_received += received_this_batch
- self.remote_state.revocation_store.add_next_entry(revocation.per_commitment_secret)
-
next_point = self.remote_state.next_per_commitment_point
print("RECEIVED", received_this_batch)
t@@ -408,6 +438,7 @@ class HTLCStateMachine(PrintError):
self.local_commitment = self.pending_local_commitment
self.remote_commitment = self.pending_remote_commitment
+ self.remote_commitment_to_be_revoked = prev_remote_commitment
@staticmethod
def htlcsum(htlcs):
t@@ -574,6 +605,7 @@ class HTLCStateMachine(PrintError):
"constraints": self.constraints,
"funding_outpoint": self.funding_outpoint,
"node_id": self.node_id,
+ "remote_commitment_to_be_revoked": str(self.remote_commitment_to_be_revoked),
}
def serialize(self):
(DIR) diff --git a/electrum/lnutil.py b/electrum/lnutil.py
t@@ -1,7 +1,9 @@
-from .util import bfh, bh2u, inv_dict
-from .crypto import sha256
import json
from collections import namedtuple
+from typing import NamedTuple
+
+from .util import bfh, bh2u, inv_dict
+from .crypto import sha256
from .transaction import Transaction
from .ecc import CURVE_ORDER, sig_string_from_der_sig, ECPubkey, string_to_number
from . import ecc, bitcoin, crypto, transaction
t@@ -13,7 +15,6 @@ HTLC_TIMEOUT_WEIGHT = 663
HTLC_SUCCESS_WEIGHT = 703
Keypair = namedtuple("Keypair", ["pubkey", "privkey"])
-Outpoint = namedtuple("Outpoint", ["txid", "output_index"])
ChannelConfig = namedtuple("ChannelConfig", [
"payment_basepoint", "multisig_key", "htlc_basepoint", "delayed_basepoint", "revocation_basepoint",
"to_self_delay", "dust_limit_sat", "max_htlc_value_in_flight_msat", "max_accepted_htlcs"])
t@@ -23,6 +24,10 @@ LocalState = namedtuple("LocalState", ["ctn", "per_commitment_secret_seed", "amo
ChannelConstraints = namedtuple("ChannelConstraints", ["capacity", "is_initiator", "funding_txn_minimum_depth"])
#OpenChannel = namedtuple("OpenChannel", ["channel_id", "short_channel_id", "funding_outpoint", "local_config", "remote_config", "remote_state", "local_state", "constraints", "node_id"])
+class Outpoint(NamedTuple("Outpoint", [('txid', str), ('output_index', int)])):
+ def to_str(self):
+ return "{}:{}".format(self.txid, self.output_index)
+
class UnableToDeriveSecret(Exception): pass
t@@ -366,17 +371,25 @@ def invert_short_channel_id(short_channel_id: bytes) -> (int, int, int):
oi = int.from_bytes(short_channel_id[6:8], byteorder='big')
return bh, tpos, oi
-def get_obscured_ctn(ctn, local, remote):
+def get_obscured_ctn(ctn: int, local: bytes, remote: bytes) -> int:
mask = int.from_bytes(sha256(local + remote)[-6:], 'big')
return ctn ^ mask
-def extract_ctn_from_tx(tx, txin_index, local_payment_basepoint, remote_payment_basepoint):
+def extract_ctn_from_tx(tx, txin_index: int, local_payment_basepoint: bytes,
+ remote_payment_basepoint: bytes) -> int:
tx.deserialize()
locktime = tx.locktime
sequence = tx.inputs()[txin_index]['sequence']
obs = ((sequence & 0xffffff) << 24) + (locktime & 0xffffff)
return get_obscured_ctn(obs, local_payment_basepoint, remote_payment_basepoint)
+def extract_ctn_from_tx_and_chan(tx, chan) -> int:
+ local_pubkey = chan.local_config.payment_basepoint.pubkey
+ remote_pubkey = chan.remote_config.payment_basepoint.pubkey
+ return extract_ctn_from_tx(tx, txin_index=0,
+ local_payment_basepoint=local_pubkey,
+ remote_payment_basepoint=remote_pubkey)
+
def overall_weight(num_htlc):
return 500 + 172 * num_htlc + 224
(DIR) diff --git a/electrum/lnwatcher.py b/electrum/lnwatcher.py
t@@ -1,151 +1,310 @@
import threading
-import asyncio
+from typing import Optional, NamedTuple, Iterable
+import os
+from collections import defaultdict
from .util import PrintError, bh2u, bfh, NoDynamicFeeEstimates, aiosafe
-from .lnutil import (extract_ctn_from_tx, derive_privkey,
+from .lnutil import (extract_ctn_from_tx_and_chan, derive_privkey,
get_per_commitment_secret_from_seed, derive_pubkey,
make_commitment_output_to_remote_address,
- RevocationStore, UnableToDeriveSecret)
+ RevocationStore, Outpoint)
from . import lnutil
-from .bitcoin import redeem_script_to_address, TYPE_ADDRESS, address_to_scripthash
+from .bitcoin import redeem_script_to_address, TYPE_ADDRESS
from . import transaction
from .transaction import Transaction, TxOutput
from . import ecc
from . import wallet
+from .simple_config import SimpleConfig, FEERATE_FALLBACK_STATIC_FEE
+from .storage import WalletStorage
+from .address_synchronizer import AddressSynchronizer
-TX_MINED_STATUS_DEEP, TX_MINED_STATUS_SHALLOW, TX_MINED_STATUS_MEMPOOL, TX_MINED_STATUS_FREE = range(0, 4)
+TX_MINED_STATUS_DEEP, TX_MINED_STATUS_SHALLOW, TX_MINED_STATUS_MEMPOOL, TX_MINED_STATUS_FREE = range(0, 4)
-class LNWatcher(PrintError):
- def __init__(self, network):
- self.network = network
- self.watched_channels = {}
- self.address_status = {} # addr -> status
+class EncumberedTransaction(NamedTuple("EncumberedTransaction", [('tx', Transaction),
+ ('csv_delay', Optional[int])])):
+ def to_json(self) -> dict:
+ return {
+ 'tx': str(self.tx),
+ 'csv_delay': self.csv_delay,
+ }
- @aiosafe
- async def handle_addresses(self, funding_address):
- queue = asyncio.Queue()
- params = [address_to_scripthash(funding_address)]
- await self.network.interface.session.subscribe('blockchain.scripthash.subscribe', params, queue)
- await queue.get()
- while True:
- result = await queue.get()
- await self.on_address_status(funding_address, result)
-
- def watch_channel(self, chan, callback):
- funding_address = chan.get_funding_address()
- self.watched_channels[funding_address] = chan, callback
- asyncio.get_event_loop().create_task(self.handle_addresses(funding_address))
+ @classmethod
+ def from_json(cls, d: dict):
+ d2 = dict(d)
+ d2['tx'] = Transaction(d['tx'])
+ return EncumberedTransaction(**d2)
- async def on_address_status(self, addr, result):
- if self.address_status.get(addr) != result:
- self.address_status[addr] = result
- result = await self.network.interface.session.send_request('blockchain.scripthash.listunspent', [address_to_scripthash(addr)])
- chan, callback = self.watched_channels[addr]
- await callback(chan, result)
+class ChannelWatchInfo(NamedTuple("ChannelWatchInfo", [('outpoint', Outpoint),
+ ('sweep_address', str),
+ ('local_pubkey', bytes),
+ ('remote_pubkey', bytes),
+ ('last_ctn_our_ctx', int),
+ ('last_ctn_their_ctx', int),
+ ('last_ctn_revoked_pcs', int)])):
+ def to_json(self) -> dict:
+ return {
+ 'outpoint': self.outpoint,
+ 'sweep_address': self.sweep_address,
+ 'local_pubkey': bh2u(self.local_pubkey),
+ 'remote_pubkey': bh2u(self.remote_pubkey),
+ 'last_ctn_our_ctx': self.last_ctn_our_ctx,
+ 'last_ctn_their_ctx': self.last_ctn_their_ctx,
+ 'last_ctn_revoked_pcs': self.last_ctn_revoked_pcs,
+ }
+ @classmethod
+ def from_json(cls, d: dict):
+ d2 = dict(d)
+ d2['outpoint'] = Outpoint(*d['outpoint'])
+ d2['local_pubkey'] = bfh(d['local_pubkey'])
+ d2['remote_pubkey'] = bfh(d['remote_pubkey'])
+ return ChannelWatchInfo(**d2)
-class LNChanCloseHandler(PrintError):
+class LNWatcher(PrintError):
# TODO if verifier gets an incorrect merkle proof, that tx will never verify!!
# similarly, what if server ignores request for merkle proof?
# maybe we should disconnect from server in these cases
- def __init__(self, network, wallet, chan):
+ def __init__(self, network):
self.network = network
- self.wallet = wallet
- self.sweep_address = wallet.get_receiving_address()
- self.chan = chan
- self.lock = threading.Lock()
- self.funding_address = chan.get_funding_address()
+
+ path = os.path.join(network.config.path, "watcher_db")
+ storage = WalletStorage(path)
+ self.addr_sync = AddressSynchronizer(storage)
+ self.addr_sync.start_network(network)
+ self.lock = threading.RLock()
self.watched_addresses = set()
- network.register_callback(self.on_network_update, ['updated'])
- self.watch_address(self.funding_address)
- async def on_network_update(self, event, *args):
- if self.wallet.synchronizer.is_up_to_date():
- await self.check_onchain_situation()
+ self.channel_info = {k: ChannelWatchInfo.from_json(v)
+ for k,v in storage.get('channel_info', {}).items()} # access with 'lock'
+ self.funding_txo_spent_callback = {} # funding_outpoint -> callback
+
+ # TODO structure will need to change when we handle HTLCs......
+ # [funding_outpoint_str][ctx_txid] -> set of EncumberedTransaction
+ # access with 'lock'
+ self.sweepstore = defaultdict(lambda: defaultdict(set))
+ for funding_outpoint, ctxs in storage.get('sweepstore', {}).items():
+ for ctx_txid, set_of_txns in ctxs.items():
+ for e_tx in set_of_txns:
+ e_tx2 = EncumberedTransaction.from_json(e_tx)
+ self.sweepstore[funding_outpoint][ctx_txid].add(e_tx2)
+
+ self.network.register_callback(self.on_network_update, ['updated'])
+
+ def write_to_disk(self):
+ # FIXME: json => every update takes linear instead of constant disk write
+ with self.lock:
+ storage = self.addr_sync.storage
+ # self.channel_info
+ channel_info = {k: v.to_json() for k,v in self.channel_info.items()}
+ storage.put('channel_info', channel_info)
+ # self.sweepstore
+ sweepstore = {}
+ for funding_outpoint, ctxs in self.sweepstore.items():
+ sweepstore[funding_outpoint] = {}
+ for ctx_txid, set_of_txns in ctxs.items():
+ sweepstore[funding_outpoint][ctx_txid] = [e_tx.to_json() for e_tx in set_of_txns]
+ storage.put('sweepstore', sweepstore)
+ storage.write()
- def stop_and_delete(self):
- self.network.unregister_callback(self.on_network_update)
- # TODO delete channel from wallet storage?
+ def watch_channel(self, chan, sweep_address, callback_funding_txo_spent):
+ address = chan.get_funding_address()
+ self.watch_address(address)
+ with self.lock:
+ if address not in self.channel_info:
+ self.channel_info[address] = ChannelWatchInfo(outpoint=chan.funding_outpoint,
+ sweep_address=sweep_address,
+ local_pubkey=chan.local_config.payment_basepoint.pubkey,
+ remote_pubkey=chan.remote_config.payment_basepoint.pubkey,
+ last_ctn_our_ctx=0,
+ last_ctn_their_ctx=0,
+ last_ctn_revoked_pcs=-1)
+ self.funding_txo_spent_callback[chan.funding_outpoint] = callback_funding_txo_spent
+ self.write_to_disk()
+
+ @aiosafe
+ async def on_network_update(self, event, *args):
+ if not self.addr_sync.synchronizer:
+ self.print_error("synchronizer not set yet")
+ return
+ if not self.addr_sync.synchronizer.is_up_to_date():
+ return
+ with self.lock:
+ channel_info_items = list(self.channel_info.items())
+ for address, info in channel_info_items:
+ await self.check_onchain_situation(info.outpoint)
def watch_address(self, addr):
with self.lock:
self.watched_addresses.add(addr)
- self.wallet.synchronizer.add(addr)
+ self.addr_sync.synchronizer.add(addr)
- async def check_onchain_situation(self):
- funding_outpoint = self.chan.funding_outpoint
- ctx_candidate_txid = self.wallet.spent_outpoints[funding_outpoint.txid].get(funding_outpoint.output_index)
- if ctx_candidate_txid is None:
+ async def check_onchain_situation(self, funding_outpoint):
+ ctx_candidate_txid = self.addr_sync.spent_outpoints[funding_outpoint.txid].get(funding_outpoint.output_index)
+ # call funding_txo_spent_callback if there is one
+ is_funding_txo_spent = ctx_candidate_txid is not None
+ cb = self.funding_txo_spent_callback.get(funding_outpoint)
+ if cb: cb(is_funding_txo_spent)
+ if not is_funding_txo_spent:
return
- ctx_candidate = self.wallet.transactions.get(ctx_candidate_txid)
+ ctx_candidate = self.addr_sync.transactions.get(ctx_candidate_txid)
if ctx_candidate is None:
return
#self.print_error("funding outpoint {} is spent by {}"
# .format(funding_outpoint, ctx_candidate_txid))
- for i, txin in enumerate(ctx_candidate.inputs()):
- if txin['type'] == 'coinbase': continue
- prevout_hash = txin['prevout_hash']
- prevout_n = txin['prevout_n']
- if prevout_hash == funding_outpoint.txid and prevout_n == funding_outpoint.output_index:
- break
- else:
- raise Exception('{} is supposed to be spent by {}, but none of the inputs spend it'
- .format(funding_outpoint, ctx_candidate_txid))
- conf = self.wallet.get_tx_height(ctx_candidate_txid).conf
+ conf = self.addr_sync.get_tx_height(ctx_candidate_txid).conf
+ # only care about confirmed and verified ctxs. TODO is this necessary?
if conf == 0:
return
- keep_watching_this = await self.inspect_ctx_candidate(ctx_candidate, i)
+ keep_watching_this = await self.inspect_ctx_candidate(funding_outpoint, ctx_candidate)
if not keep_watching_this:
- self.stop_and_delete()
+ self.stop_and_delete(funding_outpoint)
- # TODO batch sweeps
- # TODO sweep HTLC outputs
- async def inspect_ctx_candidate(self, ctx, txin_idx: int):
+ def stop_and_delete(self, funding_outpoint):
+ # TODO delete channel from watcher_db
+ pass
+
+ async def inspect_ctx_candidate(self, funding_outpoint, ctx):
"""Returns True iff found any not-deeply-spent outputs that we could
potentially sweep at some point."""
+ # make sure we are subscribed to all outputs of ctx
+ not_yet_watching = False
+ for o in ctx.outputs():
+ if o.address not in self.watched_addresses:
+ self.watch_address(o.address)
+ not_yet_watching = True
+ if not_yet_watching:
+ return True
+ # get all possible responses we have
+ ctx_txid = ctx.txid()
+ with self.lock:
+ encumbered_sweep_txns = self.sweepstore[funding_outpoint.to_str()][ctx_txid]
+ if len(encumbered_sweep_txns) == 0:
+ # no useful response for this channel close..
+ if self.get_tx_mined_status(ctx_txid) == TX_MINED_STATUS_DEEP:
+ self.print_error("channel close detected for {}. but can't sweep anything :(".format(funding_outpoint))
+ return False
+ # check if any response applies
keep_watching_this = False
- chan = self.chan
- ctn = extract_ctn_from_tx(ctx, txin_idx,
- chan.local_config.payment_basepoint.pubkey,
- chan.remote_config.payment_basepoint.pubkey)
- latest_local_ctn = chan.local_state.ctn
- latest_remote_ctn = chan.remote_state.ctn
- self.print_error("ctx {} has ctn {}. latest local ctn is {}, latest remote ctn is {}"
- .format(ctx.txid(), ctn, latest_local_ctn, latest_remote_ctn))
- # see if it is a normal unilateral close by them
- if ctn == latest_remote_ctn:
- # note that we might also get here if this is our ctx and the ctn just happens to match
- their_cur_pcp = chan.remote_state.current_per_commitment_point
- if their_cur_pcp is not None:
- keep_watching_this |= await self.find_and_sweep_their_ctx_to_remote(ctx, their_cur_pcp)
- # see if we have a revoked secret for this ctn ("breach")
+ local_height = self.network.get_local_height()
+ for e_tx in encumbered_sweep_txns:
+ conflicts = self.addr_sync.get_conflicting_transactions(e_tx.tx.txid(), e_tx.tx, include_self=True)
+ conflict_mined_status = self.get_deepest_tx_mined_status_for_txids(conflicts)
+ if conflict_mined_status != TX_MINED_STATUS_DEEP:
+ keep_watching_this = True
+ if conflict_mined_status == TX_MINED_STATUS_FREE:
+ tx_height = self.addr_sync.get_tx_height(ctx_txid).height
+ num_conf = local_height - tx_height + 1
+ if num_conf >= e_tx.csv_delay:
+ await self.network.broadcast_transaction(e_tx.tx, self.print_tx_broadcast_result)
+ else:
+ self.print_error('waiting for CSV ({} < {}) for funding outpoint {} and ctx {}'
+ .format(num_conf, e_tx.csv_delay, funding_outpoint, ctx.txid()))
+ return keep_watching_this
+
+ def _get_sweep_address_for_chan(self, chan) -> str:
+ funding_address = chan.get_funding_address()
try:
- per_commitment_secret = chan.remote_state.revocation_store.retrieve_secret(
- RevocationStore.START_INDEX - ctn)
- except UnableToDeriveSecret:
- self.print_error("revocation store does not have secret for ctx {}".format(ctx.txid()))
+ channel_info = self.channel_info[funding_address]
+ except KeyError:
+ # this is used during channel opening, as we only start watching
+ # the channel once it gets into the "opening" state, but we need to
+ # process the first ctx before that.
+ return chan.sweep_address
+ return channel_info.sweep_address
+
+ def _get_last_ctn_for_processed_ctx(self, funding_address: str, ours: bool) -> int:
+ try:
+ ci = self.channel_info[funding_address]
+ except KeyError:
+ return -1
+ if ours:
+ return ci.last_ctn_our_ctx
else:
- # note that we might also get here if this is our ctx and we just happen to have
- # the secret for the symmetric ctn
- their_pcp = ecc.ECPrivkey(per_commitment_secret).get_public_key_bytes(compressed=True)
- keep_watching_this |= await self.find_and_sweep_their_ctx_to_remote(ctx, their_pcp)
- keep_watching_this |= await self.find_and_sweep_their_ctx_to_local(ctx, per_commitment_secret)
- # see if it's our ctx
- our_per_commitment_secret = get_per_commitment_secret_from_seed(
- chan.local_state.per_commitment_secret_seed, RevocationStore.START_INDEX - ctn)
- our_per_commitment_point = ecc.ECPrivkey(our_per_commitment_secret).get_public_key_bytes(compressed=True)
- keep_watching_this |= await self.find_and_sweep_our_ctx_to_local(ctx, our_per_commitment_point)
- return keep_watching_this
+ return ci.last_ctn_their_ctx
+
+ def _inc_last_ctn_for_processed_ctx(self, funding_address: str, ours: bool) -> None:
+ try:
+ ci = self.channel_info[funding_address]
+ except KeyError:
+ return
+ if ours:
+ ci = ci._replace(last_ctn_our_ctx=ci.last_ctn_our_ctx + 1)
+ else:
+ ci = ci._replace(last_ctn_their_ctx=ci.last_ctn_their_ctx + 1)
+ self.channel_info[funding_address] = ci
- def get_tx_mined_status(self, txid):
+ def _get_last_ctn_for_revoked_secret(self, funding_address: str) -> int:
+ try:
+ ci = self.channel_info[funding_address]
+ except KeyError:
+ return -1
+ return ci.last_ctn_revoked_pcs
+
+ def _inc_last_ctn_for_revoked_secret(self, funding_address: str) -> None:
+ try:
+ ci = self.channel_info[funding_address]
+ except KeyError:
+ return
+ ci = ci._replace(last_ctn_revoked_pcs=ci.last_ctn_revoked_pcs + 1)
+ self.channel_info[funding_address] = ci
+
+ # TODO batch sweeps
+ # TODO sweep HTLC outputs
+ def process_new_offchain_ctx(self, chan, ctx, ours: bool):
+ funding_address = chan.get_funding_address()
+ ctn = extract_ctn_from_tx_and_chan(ctx, chan)
+ latest_ctn_on_channel = chan.local_state.ctn if ours else chan.remote_state.ctn
+ last_ctn_watcher_saw = self._get_last_ctn_for_processed_ctx(funding_address, ours)
+ if latest_ctn_on_channel + 1 != ctn:
+ raise Exception('unexpected ctn {}. latest is {}. our ctx: {}'.format(ctn, latest_ctn_on_channel, ours))
+ if last_ctn_watcher_saw + 1 != ctn:
+ raise Exception('watcher skipping ctns!! ctn {}. last seen {}. our ctx: {}'.format(ctn, last_ctn_watcher_saw, ours))
+ #self.print_error("process_new_offchain_ctx. funding {}, ours {}, ctn {}, ctx {}"
+ # .format(chan.funding_outpoint.to_str(), ours, ctn, ctx.txid()))
+ sweep_address = self._get_sweep_address_for_chan(chan)
+ if ours:
+ our_per_commitment_secret = get_per_commitment_secret_from_seed(
+ chan.local_state.per_commitment_secret_seed, RevocationStore.START_INDEX - ctn)
+ our_cur_pcp = ecc.ECPrivkey(our_per_commitment_secret).get_public_key_bytes(compressed=True)
+ encumbered_sweeptx = maybe_create_sweeptx_for_our_ctx_to_local(chan, ctx, our_cur_pcp, sweep_address)
+ else:
+ their_cur_pcp = chan.remote_state.next_per_commitment_point
+ encumbered_sweeptx = maybe_create_sweeptx_for_their_ctx_to_remote(chan, ctx, their_cur_pcp, sweep_address)
+ self.add_to_sweepstore(chan.funding_outpoint.to_str(), ctx.txid(), encumbered_sweeptx)
+ self._inc_last_ctn_for_processed_ctx(funding_address, ours)
+ self.write_to_disk()
+
+ def process_new_revocation_secret(self, chan, per_commitment_secret: bytes):
+ funding_address = chan.get_funding_address()
+ ctx = chan.remote_commitment_to_be_revoked
+ ctn = extract_ctn_from_tx_and_chan(ctx, chan)
+ latest_ctn_on_channel = chan.remote_state.ctn
+ last_ctn_watcher_saw = self._get_last_ctn_for_revoked_secret(funding_address)
+ if latest_ctn_on_channel != ctn:
+ raise Exception('unexpected ctn {}. latest is {}'.format(ctn, latest_ctn_on_channel))
+ if last_ctn_watcher_saw + 1 != ctn:
+ raise Exception('watcher skipping ctns!! ctn {}. last seen {}'.format(ctn, last_ctn_watcher_saw))
+ sweep_address = self._get_sweep_address_for_chan(chan)
+ encumbered_sweeptx = maybe_create_sweeptx_for_their_ctx_to_local(chan, ctx, per_commitment_secret, sweep_address)
+ self.add_to_sweepstore(chan.funding_outpoint.to_str(), ctx.txid(), encumbered_sweeptx)
+ self._inc_last_ctn_for_revoked_secret(funding_address)
+ self.write_to_disk()
+
+ def add_to_sweepstore(self, funding_outpoint: str, ctx_txid: str, encumbered_sweeptx: EncumberedTransaction):
+ if encumbered_sweeptx is None:
+ return
+ with self.lock:
+ self.sweepstore[funding_outpoint][ctx_txid].add(encumbered_sweeptx)
+
+ def get_tx_mined_status(self, txid: str):
if not txid:
return TX_MINED_STATUS_FREE
- tx_mined_status = self.wallet.get_tx_height(txid)
+ tx_mined_status = self.addr_sync.get_tx_height(txid)
height, conf = tx_mined_status.height, tx_mined_status.conf
if conf > 100:
return TX_MINED_STATUS_DEEP
t@@ -161,115 +320,12 @@ class LNChanCloseHandler(PrintError):
else:
raise NotImplementedError()
- async def find_and_sweep_their_ctx_to_remote(self, ctx, their_pcp: bytes):
- """Returns True iff found a not-deeply-spent output that we could
- potentially sweep at some point."""
- payment_bp_privkey = ecc.ECPrivkey(self.chan.local_config.payment_basepoint.privkey)
- our_payment_privkey = derive_privkey(payment_bp_privkey.secret_scalar, their_pcp)
- our_payment_privkey = ecc.ECPrivkey.from_secret_scalar(our_payment_privkey)
- our_payment_pubkey = our_payment_privkey.get_public_key_bytes(compressed=True)
- to_remote_address = make_commitment_output_to_remote_address(our_payment_pubkey)
- for output_idx, o in enumerate(ctx.outputs()):
- if o.type == TYPE_ADDRESS and o.address == to_remote_address:
- self.print_error("found to_remote output paying to us: ctx {}:{}".
- format(ctx.txid(), output_idx))
- #self.print_error("ctx {} is normal unilateral close by them".format(ctx.txid()))
- break
- else:
- return False
- if to_remote_address not in self.watched_addresses:
- self.watch_address(to_remote_address)
- return True
- spending_txid = self.wallet.spent_outpoints[ctx.txid()].get(output_idx)
- stx_mined_status = self.get_tx_mined_status(spending_txid)
- if stx_mined_status == TX_MINED_STATUS_DEEP:
- return False
- elif stx_mined_status in (TX_MINED_STATUS_SHALLOW, TX_MINED_STATUS_MEMPOOL):
- return True
- sweep_tx = create_sweeptx_their_ctx_to_remote(self.network, self.sweep_address, ctx,
- output_idx, our_payment_privkey)
- res = await self.network.broadcast_transaction(sweep_tx)
- self.print_tx_broadcast_result('sweep_their_ctx_to_remote', res)
- return True
-
+ def get_deepest_tx_mined_status_for_txids(self, set_of_txids: Iterable[str]):
+ if not set_of_txids:
+ return TX_MINED_STATUS_FREE
+ # note: using "min" as lower status values are deeper
+ return min(map(self.get_tx_mined_status, set_of_txids))
- async def find_and_sweep_their_ctx_to_local(self, ctx, per_commitment_secret: bytes):
- """Returns True iff found a not-deeply-spent output that we could
- potentially sweep at some point."""
- per_commitment_point = ecc.ECPrivkey(per_commitment_secret).get_public_key_bytes(compressed=True)
- revocation_privkey = lnutil.derive_blinded_privkey(self.chan.local_config.revocation_basepoint.privkey,
- per_commitment_secret)
- revocation_pubkey = ecc.ECPrivkey(revocation_privkey).get_public_key_bytes(compressed=True)
- to_self_delay = self.chan.local_config.to_self_delay
- delayed_pubkey = derive_pubkey(self.chan.remote_config.delayed_basepoint.pubkey,
- per_commitment_point)
- witness_script = bh2u(lnutil.make_commitment_output_to_local_witness_script(
- revocation_pubkey, to_self_delay, delayed_pubkey))
- to_local_address = redeem_script_to_address('p2wsh', witness_script)
- for output_idx, o in enumerate(ctx.outputs()):
- if o.type == TYPE_ADDRESS and o.address == to_local_address:
- self.print_error("found to_local output paying to them: ctx {}:{}".
- format(ctx.txid(), output_idx))
- break
- else:
- self.print_error('could not find to_local output in their ctx {}'.format(ctx.txid()))
- return False
- if to_local_address not in self.watched_addresses:
- self.watch_address(to_local_address)
- return True
- spending_txid = self.wallet.spent_outpoints[ctx.txid()].get(output_idx)
- stx_mined_status = self.get_tx_mined_status(spending_txid)
- if stx_mined_status == TX_MINED_STATUS_DEEP:
- return False
- elif stx_mined_status in (TX_MINED_STATUS_SHALLOW, TX_MINED_STATUS_MEMPOOL):
- return True
- sweep_tx = create_sweeptx_ctx_to_local(self.network, self.sweep_address, ctx, output_idx,
- witness_script, revocation_privkey, True)
- res = await self.network.broadcast_transaction(sweep_tx)
- self.print_tx_broadcast_result('sweep_their_ctx_to_local', res)
- return True
-
- async def find_and_sweep_our_ctx_to_local(self, ctx, our_pcp: bytes):
- """Returns True iff found a not-deeply-spent output that we could
- potentially sweep at some point."""
- delayed_bp_privkey = ecc.ECPrivkey(self.chan.local_config.delayed_basepoint.privkey)
- our_localdelayed_privkey = derive_privkey(delayed_bp_privkey.secret_scalar, our_pcp)
- our_localdelayed_privkey = ecc.ECPrivkey.from_secret_scalar(our_localdelayed_privkey)
- our_localdelayed_pubkey = our_localdelayed_privkey.get_public_key_bytes(compressed=True)
- revocation_pubkey = lnutil.derive_blinded_pubkey(self.chan.remote_config.revocation_basepoint.pubkey,
- our_pcp)
- to_self_delay = self.chan.remote_config.to_self_delay
- witness_script = bh2u(lnutil.make_commitment_output_to_local_witness_script(
- revocation_pubkey, to_self_delay, our_localdelayed_pubkey))
- to_local_address = redeem_script_to_address('p2wsh', witness_script)
- for output_idx, o in enumerate(ctx.outputs()):
- if o.type == TYPE_ADDRESS and o.address == to_local_address:
- self.print_error("found to_local output paying to us (CSV-locked): ctx {}:{}".
- format(ctx.txid(), output_idx))
- break
- else:
- self.print_error('could not find to_local output in our ctx {}'.format(ctx.txid()))
- return False
- if to_local_address not in self.watched_addresses:
- self.watch_address(to_local_address)
- return True
- spending_txid = self.wallet.spent_outpoints[ctx.txid()].get(output_idx)
- stx_mined_status = self.get_tx_mined_status(spending_txid)
- if stx_mined_status == TX_MINED_STATUS_DEEP:
- return False
- elif stx_mined_status in (TX_MINED_STATUS_SHALLOW, TX_MINED_STATUS_MEMPOOL):
- return True
- # check timelock
- ctx_num_conf = self.wallet.get_tx_height(ctx.txid()).conf
- if to_self_delay > ctx_num_conf:
- self.print_error('waiting for CSV ({} < {}) for ctx {}'.format(ctx_num_conf, to_self_delay, ctx.txid()))
- return True
- sweep_tx = create_sweeptx_ctx_to_local(self.network, self.sweep_address, ctx, output_idx,
- witness_script, our_localdelayed_privkey.get_secret_bytes(),
- False, to_self_delay)
- res = await self.network.broadcast_transaction(sweep_tx)
- self.print_tx_broadcast_result('sweep_our_ctx_to_local', res)
- return True
def print_tx_broadcast_result(self, name, res):
error, msg = res
t@@ -279,9 +335,87 @@ class LNChanCloseHandler(PrintError):
self.print_error('{} broadcast succeeded'.format(name))
-def create_sweeptx_their_ctx_to_remote(network, address, ctx, output_idx: int, our_payment_privkey: ecc.ECPrivkey):
+
+def maybe_create_sweeptx_for_their_ctx_to_remote(chan, ctx, their_pcp: bytes,
+ sweep_address) -> Optional[EncumberedTransaction]:
+ assert isinstance(their_pcp, bytes)
+ payment_bp_privkey = ecc.ECPrivkey(chan.local_config.payment_basepoint.privkey)
+ our_payment_privkey = derive_privkey(payment_bp_privkey.secret_scalar, their_pcp)
+ our_payment_privkey = ecc.ECPrivkey.from_secret_scalar(our_payment_privkey)
+ our_payment_pubkey = our_payment_privkey.get_public_key_bytes(compressed=True)
+ to_remote_address = make_commitment_output_to_remote_address(our_payment_pubkey)
+ for output_idx, (type_, addr, val) in enumerate(ctx.outputs()):
+ if type_ == TYPE_ADDRESS and addr == to_remote_address:
+ break
+ else:
+ return None
+ sweep_tx = create_sweeptx_their_ctx_to_remote(address=sweep_address,
+ ctx=ctx,
+ output_idx=output_idx,
+ our_payment_privkey=our_payment_privkey)
+ return EncumberedTransaction(sweep_tx, csv_delay=0)
+
+
+def maybe_create_sweeptx_for_their_ctx_to_local(chan, ctx, per_commitment_secret: bytes,
+ sweep_address) -> Optional[EncumberedTransaction]:
+ assert isinstance(per_commitment_secret, bytes)
+ per_commitment_point = ecc.ECPrivkey(per_commitment_secret).get_public_key_bytes(compressed=True)
+ revocation_privkey = lnutil.derive_blinded_privkey(chan.local_config.revocation_basepoint.privkey,
+ per_commitment_secret)
+ revocation_pubkey = ecc.ECPrivkey(revocation_privkey).get_public_key_bytes(compressed=True)
+ to_self_delay = chan.local_config.to_self_delay
+ delayed_pubkey = derive_pubkey(chan.remote_config.delayed_basepoint.pubkey,
+ per_commitment_point)
+ witness_script = bh2u(lnutil.make_commitment_output_to_local_witness_script(
+ revocation_pubkey, to_self_delay, delayed_pubkey))
+ to_local_address = redeem_script_to_address('p2wsh', witness_script)
+ for output_idx, o in enumerate(ctx.outputs()):
+ if o.type == TYPE_ADDRESS and o.address == to_local_address:
+ break
+ else:
+ return None
+ sweep_tx = create_sweeptx_ctx_to_local(address=sweep_address,
+ ctx=ctx,
+ output_idx=output_idx,
+ witness_script=witness_script,
+ privkey=revocation_privkey,
+ is_revocation=True)
+ return EncumberedTransaction(sweep_tx, csv_delay=0)
+
+
+def maybe_create_sweeptx_for_our_ctx_to_local(chan, ctx, our_pcp: bytes,
+ sweep_address) -> Optional[EncumberedTransaction]:
+ assert isinstance(our_pcp, bytes)
+ delayed_bp_privkey = ecc.ECPrivkey(chan.local_config.delayed_basepoint.privkey)
+ our_localdelayed_privkey = derive_privkey(delayed_bp_privkey.secret_scalar, our_pcp)
+ our_localdelayed_privkey = ecc.ECPrivkey.from_secret_scalar(our_localdelayed_privkey)
+ our_localdelayed_pubkey = our_localdelayed_privkey.get_public_key_bytes(compressed=True)
+ revocation_pubkey = lnutil.derive_blinded_pubkey(chan.remote_config.revocation_basepoint.pubkey,
+ our_pcp)
+ to_self_delay = chan.remote_config.to_self_delay
+ witness_script = bh2u(lnutil.make_commitment_output_to_local_witness_script(
+ revocation_pubkey, to_self_delay, our_localdelayed_pubkey))
+ to_local_address = redeem_script_to_address('p2wsh', witness_script)
+ for output_idx, o in enumerate(ctx.outputs()):
+ if o.type == TYPE_ADDRESS and o.address == to_local_address:
+ break
+ else:
+ return None
+ sweep_tx = create_sweeptx_ctx_to_local(address=sweep_address,
+ ctx=ctx,
+ output_idx=output_idx,
+ witness_script=witness_script,
+ privkey=our_localdelayed_privkey.get_secret_bytes(),
+ is_revocation=False,
+ to_self_delay=to_self_delay)
+
+ return EncumberedTransaction(sweep_tx, csv_delay=to_self_delay)
+
+
+def create_sweeptx_their_ctx_to_remote(address, ctx, output_idx: int, our_payment_privkey: ecc.ECPrivkey,
+ fee_per_kb: int=None) -> Transaction:
our_payment_pubkey = our_payment_privkey.get_public_key_hex(compressed=True)
- val = ctx.outputs()[output_idx][2]
+ val = ctx.outputs()[output_idx].value
sweep_inputs = [{
'type': 'p2wpkh',
'x_pubkeys': [our_payment_pubkey],
t@@ -293,14 +427,10 @@ def create_sweeptx_their_ctx_to_remote(network, address, ctx, output_idx: int, o
'signatures': [None],
}]
tx_size_bytes = 110 # approx size of p2wpkh->p2wpkh
- try:
- fee = network.config.estimate_fee(tx_size_bytes)
- except NoDynamicFeeEstimates:
- fee_per_kb = network.config.fee_per_kb(dyn=False)
- fee = network.config.estimate_fee_for_feerate(fee_per_kb, tx_size_bytes)
+ if fee_per_kb is None: fee_per_kb = FEERATE_FALLBACK_STATIC_FEE
+ fee = SimpleConfig.estimate_fee_for_feerate(fee_per_kb, tx_size_bytes)
sweep_outputs = [TxOutput(TYPE_ADDRESS, address, val-fee)]
- locktime = network.get_local_height()
- sweep_tx = Transaction.from_io(sweep_inputs, sweep_outputs, locktime=locktime)
+ sweep_tx = Transaction.from_io(sweep_inputs, sweep_outputs)
sweep_tx.set_rbf(True)
sweep_tx.sign({our_payment_pubkey: (our_payment_privkey.get_secret_bytes(), True)})
if not sweep_tx.is_complete():
t@@ -308,15 +438,17 @@ def create_sweeptx_their_ctx_to_remote(network, address, ctx, output_idx: int, o
return sweep_tx
-def create_sweeptx_ctx_to_local(network, address, ctx, output_idx: int, witness_script: str,
- privkey: bytes, is_revocation: bool, to_self_delay: int=None):
+def create_sweeptx_ctx_to_local(address, ctx, output_idx: int, witness_script: str,
+ privkey: bytes, is_revocation: bool,
+ to_self_delay: int=None,
+ fee_per_kb: int=None) -> Transaction:
"""Create a txn that sweeps the 'to_local' output of a commitment
transaction into our wallet.
privkey: either revocation_privkey or localdelayed_privkey
is_revocation: tells us which ^
"""
- val = ctx.outputs()[output_idx][2]
+ val = ctx.outputs()[output_idx].value
sweep_inputs = [{
'scriptSig': '',
'type': 'p2wsh',
t@@ -331,14 +463,10 @@ def create_sweeptx_ctx_to_local(network, address, ctx, output_idx: int, witness_
if to_self_delay is not None:
sweep_inputs[0]['sequence'] = to_self_delay
tx_size_bytes = 121 # approx size of to_local -> p2wpkh
- try:
- fee = network.config.estimate_fee(tx_size_bytes)
- except NoDynamicFeeEstimates:
- fee_per_kb = network.config.fee_per_kb(dyn=False)
- fee = network.config.estimate_fee_for_feerate(fee_per_kb, tx_size_bytes)
+ if fee_per_kb is None: fee_per_kb = FEERATE_FALLBACK_STATIC_FEE
+ fee = SimpleConfig.estimate_fee_for_feerate(fee_per_kb, tx_size_bytes)
sweep_outputs = [TxOutput(TYPE_ADDRESS, address, val - fee)]
- locktime = network.get_local_height()
- sweep_tx = Transaction.from_io(sweep_inputs, sweep_outputs, locktime=locktime, version=2)
+ sweep_tx = Transaction.from_io(sweep_inputs, sweep_outputs, version=2)
sig = sweep_tx.sign_txin(0, privkey)
witness = transaction.construct_witness([sig, int(is_revocation), witness_script])
sweep_tx.inputs()[0]['witness'] = witness
(DIR) diff --git a/electrum/lnworker.py b/electrum/lnworker.py
t@@ -5,20 +5,20 @@ import random
import time
from typing import Optional, Sequence
import threading
+from functools import partial
import dns.resolver
import dns.exception
from . import constants
from .bitcoin import sha256, COIN
-from .util import bh2u, bfh, PrintError, InvoiceError, resolve_dns_srv, aiosafe
-from .lnbase import Peer, privkey_to_pubkey
+from .util import bh2u, bfh, PrintError, InvoiceError, resolve_dns_srv
+from .lnbase import Peer, privkey_to_pubkey, aiosafe
from .lnaddr import lnencode, LnAddr, lndecode
from .ecc import der_sig_from_sig_string
from .lnhtlc import HTLCStateMachine
from .lnutil import (Outpoint, calc_short_channel_id, LNPeerAddr, get_compressed_pubkey_from_bech32,
PaymentFailure)
-from .lnwatcher import LNChanCloseHandler
from .i18n import _
t@@ -35,6 +35,7 @@ class LNWorker(PrintError):
def __init__(self, wallet, network):
self.wallet = wallet
+ self.sweep_address = wallet.get_receiving_address()
self.network = network
self.channel_db = self.network.channel_db
self.lock = threading.RLock()
t@@ -48,9 +49,11 @@ class LNWorker(PrintError):
self.config = network.config
self.peers = {} # pubkey -> Peer
self.channels = {x.channel_id: x for x in map(HTLCStateMachine, wallet.storage.get("channels", []))}
+ for c in self.channels.values():
+ c.lnwatcher = network.lnwatcher
self.invoices = wallet.storage.get('lightning_invoices', {})
for chan_id, chan in self.channels.items():
- self.network.lnwatcher.watch_channel(chan, self.on_channel_utxos)
+ self.network.lnwatcher.watch_channel(chan, self.sweep_address, partial(self.on_channel_utxos, chan))
self._last_tried_peer = {} # LNPeerAddr -> unix timestamp
self._add_peers_from_config()
# wait until we see confirmations
t@@ -118,16 +121,11 @@ class LNWorker(PrintError):
return True
return False
- async def on_channel_utxos(self, chan, utxos):
- outpoints = [Outpoint(x["tx_hash"], x["tx_pos"]) for x in utxos]
- if chan.funding_outpoint not in outpoints:
- chan.set_funding_txo_spentness(True)
+ def on_channel_utxos(self, chan, is_funding_txo_spent: bool):
+ chan.set_funding_txo_spentness(is_funding_txo_spent)
+ if is_funding_txo_spent:
chan.set_state("CLOSED")
self.channel_db.remove_channel(chan.short_channel_id)
- # FIXME is this properly GC-ed? (or too soon?)
- LNChanCloseHandler(self.network, self.wallet, chan)
- else:
- chan.set_funding_txo_spentness(False)
self.network.trigger_callback('channel', chan)
@aiosafe
t@@ -138,7 +136,6 @@ class LNWorker(PrintError):
with self.lock:
channels = list(self.channels.values())
for chan in channels:
- print("update", chan.get_state())
if chan.get_state() == "OPENING":
res = self.save_short_chan_id(chan)
if not res:
t@@ -159,12 +156,16 @@ class LNWorker(PrintError):
async def _open_channel_coroutine(self, node_id, local_amount_sat, push_sat, password):
peer = self.peers[node_id]
- openingchannel = await peer.channel_establishment_flow(self.wallet, self.config, password, local_amount_sat + push_sat, push_sat * 1000, temp_channel_id=os.urandom(32))
+ openingchannel = await peer.channel_establishment_flow(self.wallet, self.config, password,
+ funding_sat=local_amount_sat + push_sat,
+ push_msat=push_sat * 1000,
+ temp_channel_id=os.urandom(32),
+ sweep_address=self.sweep_address)
if not openingchannel:
self.print_error("Channel_establishment_flow returned None")
return
self.save_channel(openingchannel)
- self.network.lnwatcher.watch_channel(openingchannel, self.on_channel_utxos)
+ self.network.lnwatcher.watch_channel(openingchannel, self.sweep_address, partial(self.on_channel_utxos, openingchannel))
self.on_channels_updated()
def on_channels_updated(self):
(DIR) diff --git a/electrum/tests/test_lnhtlc.py b/electrum/tests/test_lnhtlc.py
t@@ -64,7 +64,8 @@ def create_channel_state(funding_txid, funding_index, funding_sat, local_feerate
feerate=local_feerate
),
"constraints":lnbase.ChannelConstraints(capacity=funding_sat, is_initiator=is_initiator, funding_txn_minimum_depth=3),
- "node_id":other_node_id
+ "node_id":other_node_id,
+ "remote_commitment_to_be_revoked": None,
}
def bip32(sequence):