forked from LBRYCommunity/lbry-sdk
272 lines
9.4 KiB
Python
272 lines
9.4 KiB
Python
import os
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import asyncio
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import logging
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from typing import List, Optional, Tuple, NamedTuple, Dict
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from lbry.db import Database, Result
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from lbry.db.constants import TXO_TYPES
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from lbry.schema.result import Censor
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from lbry.blockchain.transaction import Transaction, Output
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from lbry.blockchain.ledger import Ledger
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from lbry.wallet import WalletManager
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from lbry.event import EventController, EventStream
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log = logging.getLogger(__name__)
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class BlockEvent(NamedTuple):
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height: int
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class Sync:
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"""
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Maintains local state in sync with some upstream source of truth.
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Client stays synced with wallet server
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Server stays synced with lbrycrd
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"""
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on_block: EventStream
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on_mempool: EventStream
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def __init__(self, ledger: Ledger, db: Database):
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self.ledger = ledger
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self.conf = ledger.conf
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self.db = db
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self._on_progress_controller = db._on_progress_controller
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self.on_progress = db.on_progress
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self._on_ready_controller = EventController()
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self.on_ready = self._on_ready_controller.stream
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def on_bulk_started(self):
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return self.on_progress.where() # filter for bulk started event
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def on_bulk_finished(self):
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return self.on_progress.where() # filter for bulk finished event
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async def start(self):
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raise NotImplementedError
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async def stop(self):
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raise NotImplementedError
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async def get_block_headers(self, start_height: int, end_height: int = None):
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raise NotImplementedError
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async def get_best_block_height(self) -> int:
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raise NotImplementedError
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class Service:
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"""
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Base class for light client and full node LBRY service implementations.
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This is the programmatic api (as compared to API)
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"""
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sync: Sync
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def __init__(self, ledger: Ledger):
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self.ledger, self.conf = ledger, ledger.conf
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self.db = Database(ledger)
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self.wallets = WalletManager(self.db)
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# sync has established connection with a source from which it can synchronize
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# for full service this is lbrycrd (or sync service) and for light this is full node
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self._on_connected_controller = EventController()
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self.on_connected = self._on_connected_controller.stream
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async def start(self):
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await self.db.open()
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await self.wallets.storage.prepare()
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await self.wallets.initialize()
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await self.sync.start()
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async def stop(self):
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await self.sync.stop()
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await self.db.close()
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async def get_status(self):
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pass
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def get_version(self):
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pass
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async def find_ffmpeg(self):
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pass
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async def get_file(self, uri, **kwargs):
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pass
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def create_wallet(self, wallet_id):
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return self.wallets.create(wallet_id)
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async def get_addresses(self, **constraints):
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return await self.db.get_addresses(**constraints)
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async def get_address_filters(self, start_height: int, end_height: int=None, granularity: int=0):
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raise NotImplementedError
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def reserve_outputs(self, txos):
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return self.db.reserve_outputs(txos)
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def release_outputs(self, txos):
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return self.db.release_outputs(txos)
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def release_tx(self, tx):
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return self.release_outputs([txi.txo_ref.txo for txi in tx.inputs])
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def get_utxos(self, **constraints):
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self.constraint_spending_utxos(constraints)
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return self.db.get_utxos(**constraints)
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async def get_txos(self, resolve=False, **constraints) -> Result[Output]:
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txos = await self.db.get_txos(**constraints)
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if resolve:
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return await self._resolve_for_local_results(constraints.get('accounts', []), txos)
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return txos
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def get_txo_sum(self, **constraints):
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return self.db.get_txo_sum(**constraints)
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def get_txo_plot(self, **constraints):
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return self.db.get_txo_plot(**constraints)
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def get_transactions(self, **constraints):
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return self.db.get_transactions(**constraints)
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async def get_transaction(self, tx_hash: bytes):
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tx = await self.db.get_transaction(tx_hash=tx_hash)
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if tx:
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return tx
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# try:
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# raw, merkle = await self.ledger.network.get_transaction_and_merkle(tx_hash)
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# except CodeMessageError as e:
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# if 'No such mempool or blockchain transaction.' in e.message:
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# return {'success': False, 'code': 404, 'message': 'transaction not found'}
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# return {'success': False, 'code': e.code, 'message': e.message}
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# height = merkle.get('block_height')
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# tx = Transaction(unhexlify(raw), height=height)
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# if height and height > 0:
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# await self.ledger.maybe_verify_transaction(tx, height, merkle)
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# return tx
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async def search_transactions(self, txids):
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raise NotImplementedError
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async def sum_supports(self, claim_hash: bytes, include_channel_content=False, exclude_own_supports=False) \
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-> Tuple[List[Dict], int]:
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raise NotImplementedError
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async def announce_addresses(self, address_manager, addresses: List[str]):
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await self.ledger.announce_addresses(address_manager, addresses)
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async def get_address_manager_for_address(self, address):
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details = await self.db.get_address(address=address)
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for wallet in self.wallets:
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for account in wallet.accounts:
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if account.id == details['account']:
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return account.address_managers[details['chain']]
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return None
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async def reset(self):
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self.ledger.conf = {
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'auto_connect': True,
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'default_servers': self.conf.lbryum_servers,
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'data_path': self.conf.wallet_dir,
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}
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await self.ledger.stop()
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await self.ledger.start()
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async def get_best_blockhash(self):
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if len(self.ledger.headers) <= 0:
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return self.ledger.genesis_hash
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return (await self.ledger.headers.hash(self.ledger.headers.height)).decode()
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async def maybe_broadcast_or_release(self, tx, preview=False, no_wait=False):
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if preview:
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return await self.release_tx(tx)
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try:
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await self.broadcast(tx)
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if not no_wait:
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await self.wait(tx)
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except Exception:
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await self.release_tx(tx)
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raise
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async def broadcast(self, tx):
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raise NotImplementedError
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async def wait(self, tx: Transaction, height=-1, timeout=1):
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raise NotImplementedError
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async def resolve(self, urls, **kwargs):
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raise NotImplementedError
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async def search_claims(self, accounts, **kwargs) -> Result[Output]:
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raise NotImplementedError
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async def search_supports(self, accounts, **kwargs) -> Result[Output]:
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raise NotImplementedError
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async def get_claim_by_claim_id(self, accounts, claim_id, **kwargs) -> Optional[Output]:
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for claim in await self.search_claims(accounts, claim_id=claim_id, **kwargs):
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return claim
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@staticmethod
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def constraint_spending_utxos(constraints):
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constraints['txo_type__in'] = (0, TXO_TYPES['purchase'])
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async def get_purchases(self, wallet, resolve=False, **constraints):
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purchases = await wallet.get_purchases(**constraints)
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if resolve:
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claim_ids = [p.purchased_claim_id for p in purchases]
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try:
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resolved, _, _ = await self.search_claims([], claim_ids=claim_ids)
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except Exception as err:
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if isinstance(err, asyncio.CancelledError): # TODO: remove when updated to 3.8
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raise
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log.exception("Resolve failed while looking up purchased claim ids:")
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resolved = []
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lookup = {claim.claim_id: claim for claim in resolved}
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for purchase in purchases:
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purchase.purchased_claim = lookup.get(purchase.purchased_claim_id)
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return purchases
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async def _resolve_for_local_results(self, accounts, txos: Result) -> Result:
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results = []
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response = await self.resolve(
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[txo.permanent_url for txo in txos if txo.can_decode_claim], accounts=accounts
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)
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for txo in txos:
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resolved = response.get(txo.permanent_url) if txo.can_decode_claim else None
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if isinstance(resolved, Output):
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resolved.update_annotations(txo)
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results.append(resolved)
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else:
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if isinstance(resolved, dict) and 'error' in resolved:
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txo.meta['error'] = resolved['error']
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results.append(txo)
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txos.rows = results
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return txos
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async def resolve_collection(self, collection, offset=0, page_size=1):
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claim_ids = collection.claim.collection.claims.ids[offset:page_size+offset]
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try:
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resolve_results, _, _ = await self.search_claims([], claim_ids=claim_ids)
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except Exception as err:
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if isinstance(err, asyncio.CancelledError): # TODO: remove when updated to 3.8
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raise
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log.exception("Resolve failed while looking up collection claim ids:")
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return []
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claims = []
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for claim_id in claim_ids:
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found = False
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for txo in resolve_results:
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if txo.claim_id == claim_id:
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claims.append(txo)
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found = True
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break
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if not found:
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claims.append(None)
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return claims
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