Sander van Grieken
205 lines
6.8 KiB
Python
205 lines
6.8 KiB
Python
import threading
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from PyQt5.QtCore import pyqtProperty, pyqtSignal, pyqtSlot, QObject
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from electrum.gui import messages
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from electrum.lnutil import extract_nodeid, LNPeerAddr, ln_dummy_address
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from electrum.lnworker import hardcoded_trampoline_nodes
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from electrum.logging import get_logger
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from .auth import AuthMixin, auth_protect
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from .qetxfinalizer import QETxFinalizer
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from .qetypes import QEAmount
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from .qewallet import QEWallet
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class QEChannelOpener(QObject, AuthMixin):
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def __init__(self, parent=None):
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super().__init__(parent)
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_logger = get_logger(__name__)
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_wallet = None
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_nodeid = None
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_amount = QEAmount()
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_valid = False
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_opentx = None
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validationError = pyqtSignal([str,str], arguments=['code','message'])
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conflictingBackup = pyqtSignal([str], arguments=['message'])
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channelOpening = pyqtSignal([str], arguments=['peer'])
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channelOpenError = pyqtSignal([str], arguments=['message'])
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channelOpenSuccess = pyqtSignal([str,bool], arguments=['cid','has_backup'])
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dataChanged = pyqtSignal() # generic notify signal
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walletChanged = pyqtSignal()
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@pyqtProperty(QEWallet, notify=walletChanged)
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def wallet(self):
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return self._wallet
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@wallet.setter
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def wallet(self, wallet: QEWallet):
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if self._wallet != wallet:
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self._wallet = wallet
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self.walletChanged.emit()
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nodeidChanged = pyqtSignal()
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@pyqtProperty(str, notify=nodeidChanged)
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def nodeid(self):
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return self._nodeid
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@nodeid.setter
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def nodeid(self, nodeid: str):
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if self._nodeid != nodeid:
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self._logger.debug('nodeid set -> %s' % nodeid)
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self._nodeid = nodeid
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self.nodeidChanged.emit()
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self.validate()
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amountChanged = pyqtSignal()
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@pyqtProperty(QEAmount, notify=amountChanged)
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def amount(self):
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return self._amount
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@amount.setter
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def amount(self, amount: QEAmount):
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if self._amount != amount:
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self._amount = amount
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self.amountChanged.emit()
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self.validate()
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validChanged = pyqtSignal()
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@pyqtProperty(bool, notify=validChanged)
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def valid(self):
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return self._valid
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finalizerChanged = pyqtSignal()
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@pyqtProperty(QETxFinalizer, notify=finalizerChanged)
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def finalizer(self):
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return self._finalizer
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@pyqtProperty(list, notify=dataChanged)
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def trampolineNodeNames(self):
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return list(hardcoded_trampoline_nodes().keys())
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# FIXME min channel funding amount
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# FIXME have requested funding amount
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def validate(self):
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nodeid_valid = False
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if self._nodeid:
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self._logger.debug(f'checking if {self._nodeid} is valid')
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if not self._wallet.wallet.config.get('use_gossip', False):
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self._peer = hardcoded_trampoline_nodes()[self._nodeid]
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nodeid_valid = True
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else:
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try:
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self._peer = self.nodeid_to_lnpeer(self._nodeid)
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nodeid_valid = True
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except:
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pass
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if not nodeid_valid:
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self._valid = False
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self.validChanged.emit()
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return
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self._logger.debug('amount=%s' % str(self._amount))
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if not self._amount or not (self._amount.satsInt > 0 or self._amount.isMax):
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self._valid = False
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self.validChanged.emit()
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return
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self._valid = True
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self.validChanged.emit()
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@pyqtSlot(str, result=bool)
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def validate_nodeid(self, nodeid):
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try:
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self.nodeid_to_lnpeer(nodeid)
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except Exception as e:
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self._logger.debug(repr(e))
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return False
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return True
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def nodeid_to_lnpeer(self, nodeid):
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node_pubkey, host_port = extract_nodeid(nodeid)
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host, port = host_port.split(':',1)
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return LNPeerAddr(host, int(port), node_pubkey)
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# FIXME "max" button in amount_dialog should enforce LN_MAX_FUNDING_SAT
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@pyqtSlot()
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@pyqtSlot(bool)
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def open_channel(self, confirm_backup_conflict=False):
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if not self.valid:
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return
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self._logger.debug('Connect String: %s' % str(self._peer))
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lnworker = self._wallet.wallet.lnworker
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if lnworker.has_conflicting_backup_with(self._peer.pubkey) and not confirm_backup_conflict:
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self.conflictingBackup.emit(messages.MGS_CONFLICTING_BACKUP_INSTANCE)
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return
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amount = '!' if self._amount.isMax else self._amount.satsInt
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self._logger.debug('amount = %s' % str(amount))
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coins = self._wallet.wallet.get_spendable_coins(None, nonlocal_only=True)
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mktx = lambda amt: lnworker.mktx_for_open_channel(
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coins=coins,
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funding_sat=amt,
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node_id=self._peer.pubkey,
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fee_est=None)
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acpt = lambda tx: self.do_open_channel(tx, str(self._peer), None)
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self._finalizer = QETxFinalizer(self, make_tx=mktx, accept=acpt)
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self._finalizer.canRbf = False
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self._finalizer.amount = self._amount
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self._finalizer.wallet = self._wallet
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self.finalizerChanged.emit()
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@auth_protect
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def do_open_channel(self, funding_tx, conn_str, password):
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self._logger.debug('opening channel')
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# read funding_sat from tx; converts '!' to int value
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funding_sat = funding_tx.output_value_for_address(ln_dummy_address())
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lnworker = self._wallet.wallet.lnworker
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def open_thread():
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try:
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chan, _funding_tx = lnworker.open_channel(
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connect_str=conn_str,
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funding_tx=funding_tx,
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funding_sat=funding_sat,
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push_amt_sat=0,
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password=password)
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except Exception as e:
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self._logger.exception("Problem opening channel: %s", repr(e))
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self.channelOpenError.emit(repr(e))
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return
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self._logger.debug('opening channel succeeded')
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self.channelOpenSuccess.emit(chan.channel_id.hex(), chan.has_onchain_backup())
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self._logger.debug('starting open thread')
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self.channelOpening.emit(conn_str)
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threading.Thread(target=open_thread).start()
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# TODO: it would be nice to show this before broadcasting
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#if chan.has_onchain_backup():
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#self.maybe_show_funding_tx(chan, funding_tx)
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#else:
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#title = _('Save backup')
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#help_text = _(messages.MSG_CREATED_NON_RECOVERABLE_CHANNEL)
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#data = lnworker.export_channel_backup(chan.channel_id)
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#popup = QRDialog(
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#title, data,
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#show_text=False,
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#text_for_clipboard=data,
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#help_text=help_text,
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#close_button_text=_('OK'),
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#on_close=lambda: self.maybe_show_funding_tx(chan, funding_tx))
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#popup.open()
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