1121 lines
47 KiB
Python
1121 lines
47 KiB
Python
import os
|
|
import copy
|
|
import time
|
|
import asyncio
|
|
import logging
|
|
from io import StringIO
|
|
from datetime import datetime
|
|
from functools import partial
|
|
from operator import itemgetter
|
|
from collections import defaultdict
|
|
from binascii import hexlify, unhexlify
|
|
from typing import Dict, Tuple, Type, Iterable, List, Optional, DefaultDict, NamedTuple
|
|
|
|
import pylru
|
|
from lbry.schema.result import Outputs, INVALID, NOT_FOUND
|
|
from lbry.schema.url import URL
|
|
from lbry.crypto.hash import hash160, double_sha256, sha256
|
|
from lbry.crypto.base58 import Base58
|
|
|
|
from .tasks import TaskGroup
|
|
from .database import Database
|
|
from .stream import StreamController
|
|
from .dewies import dewies_to_lbc
|
|
from .account import Account, AddressManager, SingleKey
|
|
from .network import Network
|
|
from .transaction import Transaction, Output
|
|
from .header import Headers, UnvalidatedHeaders
|
|
from .checkpoints import HASHES
|
|
from .constants import TXO_TYPES, CLAIM_TYPES, COIN, NULL_HASH32
|
|
from .bip32 import PubKey, PrivateKey
|
|
from .coinselection import CoinSelector
|
|
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
LedgerType = Type['BaseLedger']
|
|
|
|
|
|
class LedgerRegistry(type):
|
|
|
|
ledgers: Dict[str, LedgerType] = {}
|
|
|
|
def __new__(mcs, name, bases, attrs):
|
|
cls: LedgerType = super().__new__(mcs, name, bases, attrs)
|
|
if not (name == 'BaseLedger' and not bases):
|
|
ledger_id = cls.get_id()
|
|
assert ledger_id not in mcs.ledgers, \
|
|
f'Ledger with id "{ledger_id}" already registered.'
|
|
mcs.ledgers[ledger_id] = cls
|
|
return cls
|
|
|
|
@classmethod
|
|
def get_ledger_class(mcs, ledger_id: str) -> LedgerType:
|
|
return mcs.ledgers[ledger_id]
|
|
|
|
|
|
class TransactionEvent(NamedTuple):
|
|
address: str
|
|
tx: Transaction
|
|
|
|
|
|
class AddressesGeneratedEvent(NamedTuple):
|
|
address_manager: AddressManager
|
|
addresses: List[str]
|
|
|
|
|
|
class BlockHeightEvent(NamedTuple):
|
|
height: int
|
|
change: int
|
|
|
|
|
|
class TransactionCacheItem:
|
|
__slots__ = '_tx', 'lock', 'has_tx', 'pending_verifications'
|
|
|
|
def __init__(self, tx: Optional[Transaction] = None, lock: Optional[asyncio.Lock] = None):
|
|
self.has_tx = asyncio.Event()
|
|
self.lock = lock or asyncio.Lock()
|
|
self._tx = self.tx = tx
|
|
self.pending_verifications = 0
|
|
|
|
@property
|
|
def tx(self) -> Optional[Transaction]:
|
|
return self._tx
|
|
|
|
@tx.setter
|
|
def tx(self, tx: Transaction):
|
|
self._tx = tx
|
|
if tx is not None:
|
|
self.has_tx.set()
|
|
|
|
|
|
class Ledger(metaclass=LedgerRegistry):
|
|
name = 'LBRY Credits'
|
|
symbol = 'LBC'
|
|
network_name = 'mainnet'
|
|
|
|
headers_class = Headers
|
|
|
|
secret_prefix = bytes((0x1c,))
|
|
pubkey_address_prefix = bytes((0x55,))
|
|
script_address_prefix = bytes((0x7a,))
|
|
extended_public_key_prefix = unhexlify('0488b21e')
|
|
extended_private_key_prefix = unhexlify('0488ade4')
|
|
|
|
max_target = 0x0000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
|
|
genesis_hash = '9c89283ba0f3227f6c03b70216b9f665f0118d5e0fa729cedf4fb34d6a34f463'
|
|
genesis_bits = 0x1f00ffff
|
|
target_timespan = 150
|
|
|
|
default_fee_per_byte = 50
|
|
default_fee_per_name_char = 200000
|
|
|
|
checkpoints = HASHES
|
|
|
|
def __init__(self, config=None):
|
|
self.config = config or {}
|
|
self.db: Database = self.config.get('db') or Database(
|
|
os.path.join(self.path, "blockchain.db")
|
|
)
|
|
self.db.ledger = self
|
|
self.headers: Headers = self.config.get('headers') or self.headers_class(
|
|
os.path.join(self.path, "headers")
|
|
)
|
|
self.headers.checkpoints = self.checkpoints
|
|
self.network: Network = self.config.get('network') or Network(self)
|
|
self.network.on_header.listen(self.receive_header)
|
|
self.network.on_status.listen(self.process_status_update)
|
|
self.network.on_connected.listen(self.join_network)
|
|
|
|
self.accounts = []
|
|
self.fee_per_byte: int = self.config.get('fee_per_byte', self.default_fee_per_byte)
|
|
|
|
self._on_transaction_controller = StreamController()
|
|
self.on_transaction = self._on_transaction_controller.stream
|
|
self.on_transaction.listen(
|
|
lambda e: log.info(
|
|
'(%s) on_transaction: address=%s, height=%s, is_verified=%s, tx.id=%s',
|
|
self.get_id(), e.address, e.tx.height, e.tx.is_verified, e.tx.id
|
|
)
|
|
)
|
|
|
|
self._on_address_controller = StreamController()
|
|
self.on_address = self._on_address_controller.stream
|
|
self.on_address.listen(
|
|
lambda e: log.info('(%s) on_address: %s', self.get_id(), e.addresses)
|
|
)
|
|
|
|
self._on_header_controller = StreamController()
|
|
self.on_header = self._on_header_controller.stream
|
|
self.on_header.listen(
|
|
lambda change: log.info(
|
|
'%s: added %s header blocks, final height %s',
|
|
self.get_id(), change, self.headers.height
|
|
)
|
|
)
|
|
self._download_height = 0
|
|
|
|
self._on_ready_controller = StreamController()
|
|
self.on_ready = self._on_ready_controller.stream
|
|
|
|
self._tx_cache = pylru.lrucache(self.config.get("tx_cache_size", 100_000))
|
|
self._update_tasks = TaskGroup()
|
|
self._other_tasks = TaskGroup() # that we dont need to start
|
|
self._utxo_reservation_lock = asyncio.Lock()
|
|
self._header_processing_lock = asyncio.Lock()
|
|
self._address_update_locks: DefaultDict[str, asyncio.Lock] = defaultdict(asyncio.Lock)
|
|
|
|
self.coin_selection_strategy = None
|
|
self._known_addresses_out_of_sync = set()
|
|
|
|
self.fee_per_name_char = self.config.get('fee_per_name_char', self.default_fee_per_name_char)
|
|
self._balance_cache = pylru.lrucache(100000)
|
|
|
|
@classmethod
|
|
def get_id(cls):
|
|
return '{}_{}'.format(cls.symbol.lower(), cls.network_name.lower())
|
|
|
|
@classmethod
|
|
def hash160_to_address(cls, h160):
|
|
raw_address = cls.pubkey_address_prefix + h160
|
|
return Base58.encode(bytearray(raw_address + double_sha256(raw_address)[0:4]))
|
|
|
|
@staticmethod
|
|
def address_to_hash160(address):
|
|
return Base58.decode(address)[1:21]
|
|
|
|
@classmethod
|
|
def is_valid_address(cls, address):
|
|
decoded = Base58.decode_check(address)
|
|
return decoded[0] == cls.pubkey_address_prefix[0]
|
|
|
|
@classmethod
|
|
def public_key_to_address(cls, public_key):
|
|
return cls.hash160_to_address(hash160(public_key))
|
|
|
|
@staticmethod
|
|
def private_key_to_wif(private_key):
|
|
return b'\x1c' + private_key + b'\x01'
|
|
|
|
@property
|
|
def path(self):
|
|
return os.path.join(self.config['data_path'], self.get_id())
|
|
|
|
def add_account(self, account: Account):
|
|
self.accounts.append(account)
|
|
|
|
async def _get_account_and_address_info_for_address(self, wallet, address):
|
|
match = await self.db.get_address(accounts=wallet.accounts, address=address)
|
|
if match:
|
|
for account in wallet.accounts:
|
|
if match['account'] == account.public_key.address:
|
|
return account, match
|
|
|
|
async def get_private_key_for_address(self, wallet, address) -> Optional[PrivateKey]:
|
|
match = await self._get_account_and_address_info_for_address(wallet, address)
|
|
if match:
|
|
account, address_info = match
|
|
return account.get_private_key(address_info['chain'], address_info['pubkey'].n)
|
|
return None
|
|
|
|
async def get_public_key_for_address(self, wallet, address) -> Optional[PubKey]:
|
|
match = await self._get_account_and_address_info_for_address(wallet, address)
|
|
if match:
|
|
_, address_info = match
|
|
return address_info['pubkey']
|
|
return None
|
|
|
|
async def get_account_for_address(self, wallet, address):
|
|
match = await self._get_account_and_address_info_for_address(wallet, address)
|
|
if match:
|
|
return match[0]
|
|
|
|
async def get_effective_amount_estimators(self, funding_accounts: Iterable[Account]):
|
|
estimators = []
|
|
for account in funding_accounts:
|
|
utxos = await account.get_utxos()
|
|
for utxo in utxos:
|
|
estimators.append(utxo.get_estimator(self))
|
|
return estimators
|
|
|
|
async def get_addresses(self, **constraints):
|
|
return await self.db.get_addresses(**constraints)
|
|
|
|
def get_address_count(self, **constraints):
|
|
return self.db.get_address_count(**constraints)
|
|
|
|
async def get_spendable_utxos(self, amount: int, funding_accounts: Optional[Iterable['Account']],
|
|
min_amount=100000):
|
|
min_amount = min(amount // 10, min_amount)
|
|
fee = Output.pay_pubkey_hash(COIN, NULL_HASH32).get_fee(self)
|
|
selector = CoinSelector(amount, fee)
|
|
async with self._utxo_reservation_lock:
|
|
if self.coin_selection_strategy == 'sqlite':
|
|
return await self.db.get_spendable_utxos(self, amount + fee, funding_accounts, min_amount=min_amount,
|
|
fee_per_byte=self.fee_per_byte)
|
|
txos = await self.get_effective_amount_estimators(funding_accounts)
|
|
spendables = selector.select(txos, self.coin_selection_strategy)
|
|
if spendables:
|
|
await self.reserve_outputs(s.txo for s in spendables)
|
|
return spendables
|
|
|
|
def reserve_outputs(self, txos):
|
|
return self.db.reserve_outputs(txos)
|
|
|
|
def release_outputs(self, txos):
|
|
return self.db.release_outputs(txos)
|
|
|
|
def release_tx(self, tx):
|
|
return self.release_outputs([txi.txo_ref.txo for txi in tx.inputs])
|
|
|
|
def get_utxos(self, **constraints):
|
|
self.constraint_spending_utxos(constraints)
|
|
return self.db.get_utxos(**constraints)
|
|
|
|
def get_utxo_count(self, **constraints):
|
|
self.constraint_spending_utxos(constraints)
|
|
return self.db.get_utxo_count(**constraints)
|
|
|
|
async def get_txos(self, resolve=False, **constraints) -> List[Output]:
|
|
txos = await self.db.get_txos(**constraints)
|
|
if resolve:
|
|
return await self._resolve_for_local_results(constraints.get('accounts', []), txos)
|
|
return txos
|
|
|
|
def get_txo_count(self, **constraints):
|
|
return self.db.get_txo_count(**constraints)
|
|
|
|
def get_txo_sum(self, **constraints):
|
|
return self.db.get_txo_sum(**constraints)
|
|
|
|
def get_txo_plot(self, **constraints):
|
|
return self.db.get_txo_plot(**constraints)
|
|
|
|
def get_transactions(self, **constraints):
|
|
return self.db.get_transactions(**constraints)
|
|
|
|
def get_transaction_count(self, **constraints):
|
|
return self.db.get_transaction_count(**constraints)
|
|
|
|
async def get_local_status_and_history(self, address, history=None):
|
|
if not history:
|
|
address_details = await self.db.get_address(address=address)
|
|
history = (address_details['history'] if address_details else '') or ''
|
|
parts = history.split(':')[:-1]
|
|
return (
|
|
hexlify(sha256(history.encode())).decode() if history else None,
|
|
list(zip(parts[0::2], map(int, parts[1::2])))
|
|
)
|
|
|
|
@staticmethod
|
|
def get_root_of_merkle_tree(branches, branch_positions, working_branch):
|
|
for i, branch in enumerate(branches):
|
|
other_branch = unhexlify(branch)[::-1]
|
|
other_branch_on_left = bool((branch_positions >> i) & 1)
|
|
if other_branch_on_left:
|
|
combined = other_branch + working_branch
|
|
else:
|
|
combined = working_branch + other_branch
|
|
working_branch = double_sha256(combined)
|
|
return hexlify(working_branch[::-1])
|
|
|
|
async def start(self):
|
|
if not os.path.exists(self.path):
|
|
os.mkdir(self.path)
|
|
await asyncio.wait([
|
|
self.db.open(),
|
|
self.headers.open()
|
|
])
|
|
fully_synced = self.on_ready.first
|
|
asyncio.create_task(self.network.start())
|
|
await self.network.on_connected.first
|
|
async with self._header_processing_lock:
|
|
await self._update_tasks.add(self.initial_headers_sync())
|
|
await fully_synced
|
|
await asyncio.gather(*(a.maybe_migrate_certificates() for a in self.accounts))
|
|
await asyncio.gather(*(a.save_max_gap() for a in self.accounts))
|
|
if len(self.accounts) > 10:
|
|
log.info("Loaded %i accounts", len(self.accounts))
|
|
else:
|
|
await self._report_state()
|
|
self.on_transaction.listen(self._reset_balance_cache)
|
|
|
|
async def join_network(self, *_):
|
|
log.info("Subscribing and updating accounts.")
|
|
await self._update_tasks.add(self.subscribe_accounts())
|
|
await self._update_tasks.done.wait()
|
|
self._on_ready_controller.add(True)
|
|
|
|
async def stop(self):
|
|
self._update_tasks.cancel()
|
|
self._other_tasks.cancel()
|
|
await self._update_tasks.done.wait()
|
|
await self._other_tasks.done.wait()
|
|
await self.network.stop()
|
|
await self.db.close()
|
|
await self.headers.close()
|
|
|
|
@property
|
|
def local_height_including_downloaded_height(self):
|
|
return max(self.headers.height, self._download_height)
|
|
|
|
async def initial_headers_sync(self):
|
|
get_chunk = partial(self.network.retriable_call, self.network.get_headers, count=1000, b64=True)
|
|
self.headers.chunk_getter = get_chunk
|
|
|
|
async def doit():
|
|
for height in reversed(sorted(self.headers.known_missing_checkpointed_chunks)):
|
|
async with self._header_processing_lock:
|
|
await self.headers.ensure_chunk_at(height)
|
|
self._other_tasks.add(doit())
|
|
await self.update_headers()
|
|
|
|
async def update_headers(self, height=None, headers=None, subscription_update=False):
|
|
rewound = 0
|
|
while True:
|
|
|
|
if height is None or height > len(self.headers):
|
|
# sometimes header subscription updates are for a header in the future
|
|
# which can't be connected, so we do a normal header sync instead
|
|
height = len(self.headers)
|
|
headers = None
|
|
subscription_update = False
|
|
|
|
if not headers:
|
|
header_response = await self.network.retriable_call(self.network.get_headers, height, 2001)
|
|
headers = header_response['hex']
|
|
|
|
if not headers:
|
|
# Nothing to do, network thinks we're already at the latest height.
|
|
return
|
|
|
|
added = await self.headers.connect(height, unhexlify(headers))
|
|
if added > 0:
|
|
height += added
|
|
self._on_header_controller.add(
|
|
BlockHeightEvent(self.headers.height, added))
|
|
|
|
if rewound > 0:
|
|
# we started rewinding blocks and apparently found
|
|
# a new chain
|
|
rewound = 0
|
|
await self.db.rewind_blockchain(height)
|
|
|
|
if subscription_update:
|
|
# subscription updates are for latest header already
|
|
# so we don't need to check if there are newer / more
|
|
# on another loop of update_headers(), just return instead
|
|
return
|
|
|
|
elif added == 0:
|
|
# we had headers to connect but none got connected, probably a reorganization
|
|
height -= 1
|
|
rewound += 1
|
|
log.warning(
|
|
"Blockchain Reorganization: attempting rewind to height %s from starting height %s",
|
|
height, height+rewound
|
|
)
|
|
|
|
else:
|
|
raise IndexError(f"headers.connect() returned negative number ({added})")
|
|
|
|
if height < 0:
|
|
raise IndexError(
|
|
"Blockchain reorganization rewound all the way back to genesis hash. "
|
|
"Something is very wrong. Maybe you are on the wrong blockchain?"
|
|
)
|
|
|
|
if rewound >= 100:
|
|
raise IndexError(
|
|
"Blockchain reorganization dropped {} headers. This is highly unusual. "
|
|
"Will not continue to attempt reorganizing. Please, delete the ledger "
|
|
"synchronization directory inside your wallet directory (folder: '{}') and "
|
|
"restart the program to synchronize from scratch."
|
|
.format(rewound, self.get_id())
|
|
)
|
|
|
|
headers = None # ready to download some more headers
|
|
|
|
# if we made it this far and this was a subscription_update
|
|
# it means something went wrong and now we're doing a more
|
|
# robust sync, turn off subscription update shortcut
|
|
subscription_update = False
|
|
|
|
async def receive_header(self, response):
|
|
async with self._header_processing_lock:
|
|
header = response[0]
|
|
await self.update_headers(
|
|
height=header['height'], headers=header['hex'], subscription_update=True
|
|
)
|
|
|
|
async def subscribe_accounts(self):
|
|
if self.network.is_connected and self.accounts:
|
|
log.info("Subscribe to %i accounts", len(self.accounts))
|
|
await asyncio.wait([
|
|
self.subscribe_account(a) for a in self.accounts
|
|
])
|
|
|
|
async def subscribe_account(self, account: Account):
|
|
for address_manager in account.address_managers.values():
|
|
await self.subscribe_addresses(address_manager, await address_manager.get_addresses())
|
|
await account.ensure_address_gap()
|
|
|
|
async def unsubscribe_account(self, account: Account):
|
|
for address in await account.get_addresses():
|
|
await self.network.unsubscribe_address(address)
|
|
|
|
async def announce_addresses(self, address_manager: AddressManager, addresses: List[str]):
|
|
await self.subscribe_addresses(address_manager, addresses)
|
|
await self._on_address_controller.add(
|
|
AddressesGeneratedEvent(address_manager, addresses)
|
|
)
|
|
|
|
async def subscribe_addresses(self, address_manager: AddressManager, addresses: List[str], batch_size: int = 1000):
|
|
if self.network.is_connected and addresses:
|
|
addresses_remaining = list(addresses)
|
|
while addresses_remaining:
|
|
batch = addresses_remaining[:batch_size]
|
|
results = await self.network.subscribe_address(*batch)
|
|
for address, remote_status in zip(batch, results):
|
|
self._update_tasks.add(self.update_history(address, remote_status, address_manager))
|
|
addresses_remaining = addresses_remaining[batch_size:]
|
|
log.info("subscribed to %i/%i addresses on %s:%i", len(addresses) - len(addresses_remaining),
|
|
len(addresses), *self.network.client.server_address_and_port)
|
|
log.info(
|
|
"finished subscribing to %i addresses on %s:%i", len(addresses),
|
|
*self.network.client.server_address_and_port
|
|
)
|
|
|
|
def process_status_update(self, update):
|
|
address, remote_status = update
|
|
self._update_tasks.add(self.update_history(address, remote_status))
|
|
|
|
async def update_history(self, address, remote_status, address_manager: AddressManager = None):
|
|
async with self._address_update_locks[address]:
|
|
self._known_addresses_out_of_sync.discard(address)
|
|
|
|
local_status, local_history = await self.get_local_status_and_history(address)
|
|
|
|
if local_status == remote_status:
|
|
return True
|
|
|
|
remote_history = await self.network.retriable_call(self.network.get_history, address)
|
|
remote_history = list(map(itemgetter('tx_hash', 'height'), remote_history))
|
|
we_need = set(remote_history) - set(local_history)
|
|
if not we_need:
|
|
return True
|
|
|
|
cache_tasks: List[asyncio.Task[Transaction]] = []
|
|
synced_history = StringIO()
|
|
loop = asyncio.get_running_loop()
|
|
for i, (txid, remote_height) in enumerate(remote_history):
|
|
if i < len(local_history) and local_history[i] == (txid, remote_height) and not cache_tasks:
|
|
synced_history.write(f'{txid}:{remote_height}:')
|
|
else:
|
|
check_local = (txid, remote_height) not in we_need
|
|
cache_tasks.append(loop.create_task(
|
|
self.cache_transaction(txid, remote_height, check_local=check_local)
|
|
))
|
|
|
|
synced_txs = []
|
|
for task in cache_tasks:
|
|
tx = await task
|
|
|
|
check_db_for_txos = []
|
|
for txi in tx.inputs:
|
|
if txi.txo_ref.txo is not None:
|
|
continue
|
|
cache_item = self._tx_cache.get(txi.txo_ref.tx_ref.id)
|
|
if cache_item is not None:
|
|
if cache_item.tx is None:
|
|
await cache_item.has_tx.wait()
|
|
assert cache_item.tx is not None
|
|
txi.txo_ref = cache_item.tx.outputs[txi.txo_ref.position].ref
|
|
else:
|
|
check_db_for_txos.append(txi.txo_ref.id)
|
|
|
|
referenced_txos = {} if not check_db_for_txos else {
|
|
txo.id: txo for txo in await self.db.get_txos(
|
|
txoid__in=check_db_for_txos, order_by='txo.txoid', no_tx=True
|
|
)
|
|
}
|
|
|
|
for txi in tx.inputs:
|
|
if txi.txo_ref.txo is not None:
|
|
continue
|
|
referenced_txo = referenced_txos.get(txi.txo_ref.id)
|
|
if referenced_txo is not None:
|
|
txi.txo_ref = referenced_txo.ref
|
|
|
|
synced_history.write(f'{tx.id}:{tx.height}:')
|
|
synced_txs.append(tx)
|
|
|
|
await self.db.save_transaction_io_batch(
|
|
synced_txs, address, self.address_to_hash160(address), synced_history.getvalue()
|
|
)
|
|
await asyncio.wait([
|
|
self._on_transaction_controller.add(TransactionEvent(address, tx))
|
|
for tx in synced_txs
|
|
])
|
|
|
|
if address_manager is None:
|
|
address_manager = await self.get_address_manager_for_address(address)
|
|
|
|
if address_manager is not None:
|
|
await address_manager.ensure_address_gap()
|
|
|
|
local_status, local_history = \
|
|
await self.get_local_status_and_history(address, synced_history.getvalue())
|
|
if local_status != remote_status:
|
|
if local_history == remote_history:
|
|
log.warning(
|
|
"%s has a synced history but a mismatched status", address
|
|
)
|
|
return True
|
|
remote_set = set(remote_history)
|
|
local_set = set(local_history)
|
|
log.warning(
|
|
"%s is out of sync after syncing.\n"
|
|
"Remote: %s with %d items (%i unique), local: %s with %d items (%i unique).\n"
|
|
"Histories are mismatched on %i items.\n"
|
|
"Local is missing\n"
|
|
"%s\n"
|
|
"Remote is missing\n"
|
|
"%s\n"
|
|
"******",
|
|
address, remote_status, len(remote_history), len(remote_set),
|
|
local_status, len(local_history), len(local_set), len(remote_set.symmetric_difference(local_set)),
|
|
"\n".join([f"{txid} - {height}" for txid, height in local_set.difference(remote_set)]),
|
|
"\n".join([f"{txid} - {height}" for txid, height in remote_set.difference(local_set)])
|
|
)
|
|
self._known_addresses_out_of_sync.add(address)
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
async def cache_transaction(self, txid, remote_height, check_local=True):
|
|
cache_item = self._tx_cache.get(txid)
|
|
if cache_item is None:
|
|
cache_item = self._tx_cache[txid] = TransactionCacheItem()
|
|
elif cache_item.tx is not None and \
|
|
cache_item.tx.height >= remote_height and \
|
|
(cache_item.tx.is_verified or remote_height < 1):
|
|
return cache_item.tx # cached tx is already up-to-date
|
|
|
|
try:
|
|
cache_item.pending_verifications += 1
|
|
return await self._update_cache_item(cache_item, txid, remote_height, check_local)
|
|
finally:
|
|
cache_item.pending_verifications -= 1
|
|
|
|
async def _update_cache_item(self, cache_item, txid, remote_height, check_local=True):
|
|
|
|
async with cache_item.lock:
|
|
|
|
tx = cache_item.tx
|
|
|
|
if tx is None and check_local:
|
|
# check local db
|
|
tx = cache_item.tx = await self.db.get_transaction(txid=txid)
|
|
|
|
merkle = None
|
|
if tx is None:
|
|
# fetch from network
|
|
_raw, merkle = await self.network.retriable_call(
|
|
self.network.get_transaction_and_merkle, txid, remote_height
|
|
)
|
|
tx = Transaction(unhexlify(_raw), height=merkle.get('block_height'))
|
|
cache_item.tx = tx # make sure it's saved before caching it
|
|
await self.maybe_verify_transaction(tx, remote_height, merkle)
|
|
return tx
|
|
|
|
async def maybe_verify_transaction(self, tx, remote_height, merkle=None):
|
|
tx.height = remote_height
|
|
cached = self._tx_cache.get(tx.id)
|
|
if not cached:
|
|
# cache txs looked up by transaction_show too
|
|
cached = TransactionCacheItem()
|
|
cached.tx = tx
|
|
self._tx_cache[tx.id] = cached
|
|
if 0 < remote_height < len(self.headers) and cached.pending_verifications <= 1:
|
|
# can't be tx.pending_verifications == 1 because we have to handle the transaction_show case
|
|
if not merkle:
|
|
merkle = await self.network.retriable_call(self.network.get_merkle, tx.id, remote_height)
|
|
merkle_root = self.get_root_of_merkle_tree(merkle['merkle'], merkle['pos'], tx.hash)
|
|
header = await self.headers.get(remote_height)
|
|
tx.position = merkle['pos']
|
|
tx.is_verified = merkle_root == header['merkle_root']
|
|
|
|
async def get_address_manager_for_address(self, address) -> Optional[AddressManager]:
|
|
details = await self.db.get_address(address=address)
|
|
for account in self.accounts:
|
|
if account.id == details['account']:
|
|
return account.address_managers[details['chain']]
|
|
return None
|
|
|
|
def broadcast(self, tx):
|
|
# broadcast can't be a retriable call yet
|
|
return self.network.broadcast(hexlify(tx.raw).decode())
|
|
|
|
async def wait(self, tx: Transaction, height=-1, timeout=1):
|
|
timeout = timeout or 600 # after 10 minutes there is almost 0 hope
|
|
addresses = set()
|
|
for txi in tx.inputs:
|
|
if txi.txo_ref.txo is not None:
|
|
addresses.add(
|
|
self.hash160_to_address(txi.txo_ref.txo.pubkey_hash)
|
|
)
|
|
for txo in tx.outputs:
|
|
if txo.has_address:
|
|
addresses.add(self.hash160_to_address(txo.pubkey_hash))
|
|
start = int(time.perf_counter())
|
|
while timeout and (int(time.perf_counter()) - start) <= timeout:
|
|
if await self._wait_round(tx, height, addresses):
|
|
return
|
|
raise asyncio.TimeoutError('Timed out waiting for transaction.')
|
|
|
|
async def _wait_round(self, tx: Transaction, height: int, addresses: Iterable[str]):
|
|
records = await self.db.get_addresses(address__in=addresses)
|
|
_, pending = await asyncio.wait([
|
|
self.on_transaction.where(partial(
|
|
lambda a, e: a == e.address and e.tx.height >= height and e.tx.id == tx.id,
|
|
address_record['address']
|
|
)) for address_record in records
|
|
], timeout=1)
|
|
if not pending:
|
|
return True
|
|
records = await self.db.get_addresses(address__in=addresses)
|
|
for record in records:
|
|
local_history = (await self.get_local_status_and_history(
|
|
record['address'], history=record['history']
|
|
))[1] if record['history'] else []
|
|
for txid, local_height in local_history:
|
|
if txid == tx.id:
|
|
if local_height >= height:
|
|
return True
|
|
log.warning(
|
|
"local history has higher height than remote for %s (%i vs %i)", txid,
|
|
local_height, height
|
|
)
|
|
return False
|
|
log.warning(
|
|
"local history does not contain %s, requested height %i", tx.id, height
|
|
)
|
|
return False
|
|
|
|
async def _inflate_outputs(
|
|
self, query, accounts,
|
|
include_purchase_receipt=False,
|
|
include_is_my_output=False,
|
|
include_sent_supports=False,
|
|
include_sent_tips=False,
|
|
include_received_tips=False) -> Tuple[List[Output], dict, int, int]:
|
|
encoded_outputs = await query
|
|
outputs = Outputs.from_base64(encoded_outputs or b'') # TODO: why is the server returning None?
|
|
txs = []
|
|
if len(outputs.txs) > 0:
|
|
txs: List[Transaction] = await asyncio.gather(*(
|
|
self.cache_transaction(*tx) for tx in outputs.txs
|
|
))
|
|
|
|
_txos, blocked = outputs.inflate(txs)
|
|
|
|
txos = []
|
|
for txo in _txos:
|
|
if isinstance(txo, Output):
|
|
# transactions and outputs are cached and shared between wallets
|
|
# we don't want to leak informaion between wallet so we add the
|
|
# wallet specific metadata on throw away copies of the txos
|
|
txo = copy.copy(txo)
|
|
channel = txo.channel
|
|
txo.purchase_receipt = None
|
|
txo.update_annotations(None)
|
|
txo.channel = channel
|
|
txos.append(txo)
|
|
|
|
includes = (
|
|
include_purchase_receipt, include_is_my_output,
|
|
include_sent_supports, include_sent_tips
|
|
)
|
|
if accounts and any(includes):
|
|
receipts = {}
|
|
if include_purchase_receipt:
|
|
priced_claims = []
|
|
for txo in txos:
|
|
if isinstance(txo, Output) and txo.has_price:
|
|
priced_claims.append(txo)
|
|
if priced_claims:
|
|
receipts = {
|
|
txo.purchased_claim_id: txo for txo in
|
|
await self.db.get_purchases(
|
|
accounts=accounts,
|
|
purchased_claim_id__in=[c.claim_id for c in priced_claims]
|
|
)
|
|
}
|
|
for txo in txos:
|
|
if isinstance(txo, Output) and txo.can_decode_claim:
|
|
if include_purchase_receipt:
|
|
txo.purchase_receipt = receipts.get(txo.claim_id)
|
|
if include_is_my_output:
|
|
mine = await self.db.get_txo_count(
|
|
claim_id=txo.claim_id, txo_type__in=CLAIM_TYPES, is_my_output=True,
|
|
is_spent=False, accounts=accounts
|
|
)
|
|
if mine:
|
|
txo.is_my_output = True
|
|
else:
|
|
txo.is_my_output = False
|
|
if include_sent_supports:
|
|
supports = await self.db.get_txo_sum(
|
|
claim_id=txo.claim_id, txo_type=TXO_TYPES['support'],
|
|
is_my_input=True, is_my_output=True,
|
|
is_spent=False, accounts=accounts
|
|
)
|
|
txo.sent_supports = supports
|
|
if include_sent_tips:
|
|
tips = await self.db.get_txo_sum(
|
|
claim_id=txo.claim_id, txo_type=TXO_TYPES['support'],
|
|
is_my_input=True, is_my_output=False,
|
|
accounts=accounts
|
|
)
|
|
txo.sent_tips = tips
|
|
if include_received_tips:
|
|
tips = await self.db.get_txo_sum(
|
|
claim_id=txo.claim_id, txo_type=TXO_TYPES['support'],
|
|
is_my_input=False, is_my_output=True,
|
|
accounts=accounts
|
|
)
|
|
txo.received_tips = tips
|
|
return txos, blocked, outputs.offset, outputs.total
|
|
|
|
async def resolve(self, accounts, urls, **kwargs):
|
|
resolve = partial(self.network.retriable_call, self.network.resolve)
|
|
urls_copy = list(urls)
|
|
txos = []
|
|
while urls_copy:
|
|
batch, urls_copy = urls_copy[:500], urls_copy[500:]
|
|
txos.extend((await self._inflate_outputs(resolve(batch), accounts, **kwargs))[0])
|
|
assert len(urls) == len(txos), "Mismatch between urls requested for resolve and responses received."
|
|
result = {}
|
|
for url, txo in zip(urls, txos):
|
|
if txo:
|
|
if isinstance(txo, Output) and URL.parse(url).has_stream_in_channel:
|
|
if not txo.channel or not txo.is_signed_by(txo.channel, self):
|
|
txo = {'error': {'name': INVALID, 'text': f'{url} has invalid channel signature'}}
|
|
else:
|
|
txo = {'error': {'name': NOT_FOUND, 'text': f'{url} did not resolve to a claim'}}
|
|
result[url] = txo
|
|
return result
|
|
|
|
async def claim_search(
|
|
self, accounts, include_purchase_receipt=False, include_is_my_output=False,
|
|
**kwargs) -> Tuple[List[Output], dict, int, int]:
|
|
return await self._inflate_outputs(
|
|
self.network.claim_search(**kwargs), accounts,
|
|
include_purchase_receipt=include_purchase_receipt,
|
|
include_is_my_output=include_is_my_output
|
|
)
|
|
|
|
async def get_claim_by_claim_id(self, accounts, claim_id, **kwargs) -> Output:
|
|
for claim in (await self.claim_search(accounts, claim_id=claim_id, **kwargs))[0]:
|
|
return claim
|
|
|
|
async def _report_state(self):
|
|
try:
|
|
for account in self.accounts:
|
|
balance = dewies_to_lbc(await account.get_balance(include_claims=True))
|
|
channel_count = await account.get_channel_count()
|
|
claim_count = await account.get_claim_count()
|
|
if isinstance(account.receiving, SingleKey):
|
|
log.info("Loaded single key account %s with %s LBC. "
|
|
"%d channels, %d certificates and %d claims",
|
|
account.id, balance, channel_count, len(account.channel_keys), claim_count)
|
|
else:
|
|
total_receiving = len(await account.receiving.get_addresses())
|
|
total_change = len(await account.change.get_addresses())
|
|
log.info("Loaded account %s with %s LBC, %d receiving addresses (gap: %d), "
|
|
"%d change addresses (gap: %d), %d channels, %d certificates and %d claims. ",
|
|
account.id, balance, total_receiving, account.receiving.gap, total_change,
|
|
account.change.gap, channel_count, len(account.channel_keys), claim_count)
|
|
except Exception as err:
|
|
if isinstance(err, asyncio.CancelledError): # TODO: remove when updated to 3.8
|
|
raise
|
|
log.exception(
|
|
'Failed to display wallet state, please file issue '
|
|
'for this bug along with the traceback you see below:')
|
|
|
|
async def _reset_balance_cache(self, e: TransactionEvent):
|
|
account_ids = [
|
|
r['account'] for r in await self.db.get_addresses(('account',), address=e.address)
|
|
]
|
|
for account_id in account_ids:
|
|
if account_id in self._balance_cache:
|
|
del self._balance_cache[account_id]
|
|
|
|
@staticmethod
|
|
def constraint_spending_utxos(constraints):
|
|
constraints['txo_type__in'] = (0, TXO_TYPES['purchase'])
|
|
|
|
async def get_purchases(self, resolve=False, **constraints):
|
|
purchases = await self.db.get_purchases(**constraints)
|
|
if resolve:
|
|
claim_ids = [p.purchased_claim_id for p in purchases]
|
|
try:
|
|
resolved, _, _, _ = await self.claim_search([], claim_ids=claim_ids)
|
|
except Exception as err:
|
|
if isinstance(err, asyncio.CancelledError): # TODO: remove when updated to 3.8
|
|
raise
|
|
log.exception("Resolve failed while looking up purchased claim ids:")
|
|
resolved = []
|
|
lookup = {claim.claim_id: claim for claim in resolved}
|
|
for purchase in purchases:
|
|
purchase.purchased_claim = lookup.get(purchase.purchased_claim_id)
|
|
return purchases
|
|
|
|
def get_purchase_count(self, resolve=False, **constraints):
|
|
return self.db.get_purchase_count(**constraints)
|
|
|
|
async def _resolve_for_local_results(self, accounts, txos):
|
|
results = []
|
|
response = await self.resolve(
|
|
accounts, [txo.permanent_url for txo in txos if txo.can_decode_claim]
|
|
)
|
|
for txo in txos:
|
|
resolved = response.get(txo.permanent_url) if txo.can_decode_claim else None
|
|
if isinstance(resolved, Output):
|
|
resolved.update_annotations(txo)
|
|
results.append(resolved)
|
|
else:
|
|
if isinstance(resolved, dict) and 'error' in resolved:
|
|
txo.meta['error'] = resolved['error']
|
|
results.append(txo)
|
|
return results
|
|
|
|
async def get_claims(self, resolve=False, **constraints):
|
|
claims = await self.db.get_claims(**constraints)
|
|
if resolve:
|
|
return await self._resolve_for_local_results(constraints.get('accounts', []), claims)
|
|
return claims
|
|
|
|
def get_claim_count(self, **constraints):
|
|
return self.db.get_claim_count(**constraints)
|
|
|
|
async def get_streams(self, resolve=False, **constraints):
|
|
streams = await self.db.get_streams(**constraints)
|
|
if resolve:
|
|
return await self._resolve_for_local_results(constraints.get('accounts', []), streams)
|
|
return streams
|
|
|
|
def get_stream_count(self, **constraints):
|
|
return self.db.get_stream_count(**constraints)
|
|
|
|
async def get_channels(self, resolve=False, **constraints):
|
|
channels = await self.db.get_channels(**constraints)
|
|
if resolve:
|
|
return await self._resolve_for_local_results(constraints.get('accounts', []), channels)
|
|
return channels
|
|
|
|
def get_channel_count(self, **constraints):
|
|
return self.db.get_channel_count(**constraints)
|
|
|
|
async def resolve_collection(self, collection, offset=0, page_size=1):
|
|
claim_ids = collection.claim.collection.claims.ids[offset:page_size+offset]
|
|
try:
|
|
resolve_results, _, _, _ = await self.claim_search([], claim_ids=claim_ids)
|
|
except Exception as err:
|
|
if isinstance(err, asyncio.CancelledError): # TODO: remove when updated to 3.8
|
|
raise
|
|
log.exception("Resolve failed while looking up collection claim ids:")
|
|
return []
|
|
claims = []
|
|
for claim_id in claim_ids:
|
|
found = False
|
|
for txo in resolve_results:
|
|
if txo.claim_id == claim_id:
|
|
claims.append(txo)
|
|
found = True
|
|
break
|
|
if not found:
|
|
claims.append(None)
|
|
return claims
|
|
|
|
async def get_collections(self, resolve_claims=0, **constraints):
|
|
collections = await self.db.get_collections(**constraints)
|
|
if resolve_claims > 0:
|
|
for collection in collections:
|
|
collection.claims = await self.resolve_collection(collection, page_size=resolve_claims)
|
|
return collections
|
|
|
|
def get_collection_count(self, resolve_claims=0, **constraints):
|
|
return self.db.get_collection_count(**constraints)
|
|
|
|
def get_supports(self, **constraints):
|
|
return self.db.get_supports(**constraints)
|
|
|
|
def get_support_count(self, **constraints):
|
|
return self.db.get_support_count(**constraints)
|
|
|
|
async def get_transaction_history(self, read_only=False, **constraints):
|
|
txs: List[Transaction] = await self.db.get_transactions(
|
|
include_is_my_output=True, include_is_spent=True,
|
|
read_only=read_only, **constraints
|
|
)
|
|
headers = self.headers
|
|
history = []
|
|
for tx in txs: # pylint: disable=too-many-nested-blocks
|
|
ts = headers.estimated_timestamp(tx.height)
|
|
item = {
|
|
'txid': tx.id,
|
|
'timestamp': ts,
|
|
'date': datetime.fromtimestamp(ts).isoformat(' ')[:-3] if tx.height > 0 else None,
|
|
'confirmations': (headers.height+1) - tx.height if tx.height > 0 else 0,
|
|
'claim_info': [],
|
|
'update_info': [],
|
|
'support_info': [],
|
|
'abandon_info': [],
|
|
'purchase_info': []
|
|
}
|
|
is_my_inputs = all([txi.is_my_input for txi in tx.inputs])
|
|
if is_my_inputs:
|
|
# fees only matter if we are the ones paying them
|
|
item['value'] = dewies_to_lbc(tx.net_account_balance+tx.fee)
|
|
item['fee'] = dewies_to_lbc(-tx.fee)
|
|
else:
|
|
# someone else paid the fees
|
|
item['value'] = dewies_to_lbc(tx.net_account_balance)
|
|
item['fee'] = '0.0'
|
|
for txo in tx.my_claim_outputs:
|
|
item['claim_info'].append({
|
|
'address': txo.get_address(self),
|
|
'balance_delta': dewies_to_lbc(-txo.amount),
|
|
'amount': dewies_to_lbc(txo.amount),
|
|
'claim_id': txo.claim_id,
|
|
'claim_name': txo.claim_name,
|
|
'nout': txo.position,
|
|
'is_spent': txo.is_spent,
|
|
})
|
|
for txo in tx.my_update_outputs:
|
|
if is_my_inputs: # updating my own claim
|
|
previous = None
|
|
for txi in tx.inputs:
|
|
if txi.txo_ref.txo is not None:
|
|
other_txo = txi.txo_ref.txo
|
|
if (other_txo.is_claim or other_txo.script.is_support_claim) \
|
|
and other_txo.claim_id == txo.claim_id:
|
|
previous = other_txo
|
|
break
|
|
if previous is not None:
|
|
item['update_info'].append({
|
|
'address': txo.get_address(self),
|
|
'balance_delta': dewies_to_lbc(previous.amount-txo.amount),
|
|
'amount': dewies_to_lbc(txo.amount),
|
|
'claim_id': txo.claim_id,
|
|
'claim_name': txo.claim_name,
|
|
'nout': txo.position,
|
|
'is_spent': txo.is_spent,
|
|
})
|
|
else: # someone sent us their claim
|
|
item['update_info'].append({
|
|
'address': txo.get_address(self),
|
|
'balance_delta': dewies_to_lbc(0),
|
|
'amount': dewies_to_lbc(txo.amount),
|
|
'claim_id': txo.claim_id,
|
|
'claim_name': txo.claim_name,
|
|
'nout': txo.position,
|
|
'is_spent': txo.is_spent,
|
|
})
|
|
for txo in tx.my_support_outputs:
|
|
item['support_info'].append({
|
|
'address': txo.get_address(self),
|
|
'balance_delta': dewies_to_lbc(txo.amount if not is_my_inputs else -txo.amount),
|
|
'amount': dewies_to_lbc(txo.amount),
|
|
'claim_id': txo.claim_id,
|
|
'claim_name': txo.claim_name,
|
|
'is_tip': not is_my_inputs,
|
|
'nout': txo.position,
|
|
'is_spent': txo.is_spent,
|
|
})
|
|
if is_my_inputs:
|
|
for txo in tx.other_support_outputs:
|
|
item['support_info'].append({
|
|
'address': txo.get_address(self),
|
|
'balance_delta': dewies_to_lbc(-txo.amount),
|
|
'amount': dewies_to_lbc(txo.amount),
|
|
'claim_id': txo.claim_id,
|
|
'claim_name': txo.claim_name,
|
|
'is_tip': is_my_inputs,
|
|
'nout': txo.position,
|
|
'is_spent': txo.is_spent,
|
|
})
|
|
for txo in tx.my_abandon_outputs:
|
|
item['abandon_info'].append({
|
|
'address': txo.get_address(self),
|
|
'balance_delta': dewies_to_lbc(txo.amount),
|
|
'amount': dewies_to_lbc(txo.amount),
|
|
'claim_id': txo.claim_id,
|
|
'claim_name': txo.claim_name,
|
|
'nout': txo.position
|
|
})
|
|
for txo in tx.any_purchase_outputs:
|
|
item['purchase_info'].append({
|
|
'address': txo.get_address(self),
|
|
'balance_delta': dewies_to_lbc(txo.amount if not is_my_inputs else -txo.amount),
|
|
'amount': dewies_to_lbc(txo.amount),
|
|
'claim_id': txo.purchased_claim_id,
|
|
'nout': txo.position,
|
|
'is_spent': txo.is_spent,
|
|
})
|
|
history.append(item)
|
|
return history
|
|
|
|
def get_transaction_history_count(self, read_only=False, **constraints):
|
|
return self.db.get_transaction_count(read_only=read_only, **constraints)
|
|
|
|
async def get_detailed_balance(self, accounts, confirmations=0):
|
|
result = {
|
|
'total': 0,
|
|
'available': 0,
|
|
'reserved': 0,
|
|
'reserved_subtotals': {
|
|
'claims': 0,
|
|
'supports': 0,
|
|
'tips': 0
|
|
}
|
|
}
|
|
for account in accounts:
|
|
balance = self._balance_cache.get(account.id)
|
|
if not balance:
|
|
balance = self._balance_cache[account.id] =\
|
|
await account.get_detailed_balance(confirmations, reserved_subtotals=True)
|
|
for key, value in balance.items():
|
|
if key == 'reserved_subtotals':
|
|
for subkey, subvalue in value.items():
|
|
result['reserved_subtotals'][subkey] += subvalue
|
|
else:
|
|
result[key] += value
|
|
return result
|
|
|
|
|
|
class TestNetLedger(Ledger):
|
|
network_name = 'testnet'
|
|
pubkey_address_prefix = bytes((111,))
|
|
script_address_prefix = bytes((196,))
|
|
extended_public_key_prefix = unhexlify('043587cf')
|
|
extended_private_key_prefix = unhexlify('04358394')
|
|
checkpoints = {}
|
|
|
|
|
|
class RegTestLedger(Ledger):
|
|
network_name = 'regtest'
|
|
headers_class = UnvalidatedHeaders
|
|
pubkey_address_prefix = bytes((111,))
|
|
script_address_prefix = bytes((196,))
|
|
extended_public_key_prefix = unhexlify('043587cf')
|
|
extended_private_key_prefix = unhexlify('04358394')
|
|
|
|
max_target = 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
|
|
genesis_hash = '6e3fcf1299d4ec5d79c3a4c91d624a4acf9e2e173d95a1a0504f677669687556'
|
|
genesis_bits = 0x207fffff
|
|
target_timespan = 1
|
|
checkpoints = {}
|