forked from LBRYCommunity/lbry-sdk
116 lines
4.3 KiB
Python
116 lines
4.3 KiB
Python
import asyncio
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import logging
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from lbry.error import (
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InsufficientFundsError,
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ServerPaymentFeeAboveMaxAllowedError,
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ServerPaymentInvalidAddressError,
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ServerPaymentWalletLockedError
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)
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from lbry.wallet.dewies import lbc_to_dewies
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from lbry.wallet.stream import StreamController
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from lbry.wallet.transaction import Output, Transaction
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log = logging.getLogger(__name__)
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class WalletServerPayer:
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def __init__(self, payment_period=24 * 60 * 60, max_fee='1.0', analytics_manager=None):
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self.ledger = None
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self.wallet = None
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self.running = False
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self.task = None
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self.payment_period = payment_period
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self.analytics_manager = analytics_manager
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self.max_fee = max_fee
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self._on_payment_controller = StreamController()
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self.on_payment = self._on_payment_controller.stream
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self.on_payment.listen(None, on_error=lambda e: log.warning(e.args[0]))
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async def pay(self):
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while self.running:
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try:
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await self._pay()
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except (asyncio.TimeoutError, ConnectionError):
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if not self.running:
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break
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delay = max(self.payment_period / 24, 10)
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log.warning("Payement failed. Will retry after %g seconds.", delay)
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asyncio.sleep(delay)
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except BaseException as e:
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if not isinstance(e, asyncio.CancelledError):
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log.exception("Unexpected exception. Payment task exiting early.")
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self.running = False
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raise
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async def _pay(self):
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while self.running:
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await asyncio.sleep(self.payment_period)
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features = await self.ledger.network.get_server_features()
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log.debug("pay loop: received server features: %s", str(features))
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address = features['payment_address']
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amount = str(features['daily_fee'])
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if not address or not amount:
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log.debug("pay loop: no address or no amount")
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continue
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if not self.ledger.is_pubkey_address(address):
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log.info("pay loop: address not pubkey")
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self._on_payment_controller.add_error(ServerPaymentInvalidAddressError(address))
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continue
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if self.wallet.is_locked:
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log.info("pay loop: wallet is locked")
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self._on_payment_controller.add_error(ServerPaymentWalletLockedError())
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continue
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amount = lbc_to_dewies(features['daily_fee']) # check that this is in lbc and not dewies
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limit = lbc_to_dewies(self.max_fee)
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if amount > limit:
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log.info("pay loop: amount (%d) > limit (%d)", amount, limit)
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self._on_payment_controller.add_error(
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ServerPaymentFeeAboveMaxAllowedError(features['daily_fee'], self.max_fee)
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)
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continue
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try:
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tx = await Transaction.create(
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[],
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[Output.pay_pubkey_hash(amount, self.ledger.address_to_hash160(address))],
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self.wallet.get_accounts_or_all(None),
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self.wallet.get_account_or_default(None)
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)
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except InsufficientFundsError:
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self._on_payment_controller.add_error(InsufficientFundsError())
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continue
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await self.ledger.broadcast_or_release(tx, blocking=True)
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if self.analytics_manager:
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await self.analytics_manager.send_credits_sent()
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self._on_payment_controller.add(tx)
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async def start(self, ledger=None, wallet=None):
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if lbc_to_dewies(self.max_fee) < 1:
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return
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self.ledger = ledger
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self.wallet = wallet
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self.running = True
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self.task = asyncio.ensure_future(self.pay())
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self.task.add_done_callback(self._done_callback)
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def _done_callback(self, f):
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if f.cancelled():
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reason = "Cancelled"
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elif f.exception():
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reason = f'Exception: {f.exception()}'
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elif not self.running:
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reason = "Stopped"
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else:
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reason = ""
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log.info("Stopping wallet server payments. %s", reason)
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async def stop(self):
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if self.running:
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self.running = False
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self.task.cancel()
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