lbry-sdk/lbry/wallet/manager.py

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Python
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import os
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import json
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import typing
import logging
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import asyncio
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from binascii import unhexlify
from decimal import Decimal
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from typing import List, Type, MutableSequence, MutableMapping, Optional
from lbry.error import KeyFeeAboveMaxAllowedError
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from lbry.conf import Config
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from .dewies import dewies_to_lbc
from .account import Account
from .ledger import Ledger, LedgerRegistry
from .transaction import Transaction, Output
from .database import Database
from .wallet import Wallet, WalletStorage, ENCRYPT_ON_DISK
from .rpc.jsonrpc import CodeMessageError
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if typing.TYPE_CHECKING:
from lbry.extras.daemon.exchange_rate_manager import ExchangeRateManager
log = logging.getLogger(__name__)
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class WalletManager:
def __init__(self, wallets: MutableSequence[Wallet] = None,
ledgers: MutableMapping[Type[Ledger], Ledger] = None) -> None:
self.wallets = wallets or []
self.ledgers = ledgers or {}
self.running = False
self.config: Optional[Config] = None
@classmethod
def from_config(cls, config: dict) -> 'WalletManager':
manager = cls()
for ledger_id, ledger_config in config.get('ledgers', {}).items():
manager.get_or_create_ledger(ledger_id, ledger_config)
for wallet_path in config.get('wallets', []):
wallet_storage = WalletStorage(wallet_path)
wallet = Wallet.from_storage(wallet_storage, manager)
manager.wallets.append(wallet)
return manager
def get_or_create_ledger(self, ledger_id, ledger_config=None):
ledger_class = LedgerRegistry.get_ledger_class(ledger_id)
ledger = self.ledgers.get(ledger_class)
if ledger is None:
ledger = ledger_class(ledger_config or {})
self.ledgers[ledger_class] = ledger
return ledger
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def import_wallet(self, path):
storage = WalletStorage(path)
wallet = Wallet.from_storage(storage, self)
self.wallets.append(wallet)
return wallet
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@property
def default_wallet(self):
for wallet in self.wallets:
return wallet
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@property
def default_account(self):
for wallet in self.wallets:
return wallet.default_account
@property
def accounts(self):
for wallet in self.wallets:
yield from wallet.accounts
async def start(self):
self.running = True
await asyncio.gather(*(
l.start() for l in self.ledgers.values()
))
async def stop(self):
await asyncio.gather(*(
l.stop() for l in self.ledgers.values()
))
self.running = False
def get_wallet_or_default(self, wallet_id: Optional[str]) -> Wallet:
if wallet_id is None:
return self.default_wallet
return self.get_wallet_or_error(wallet_id)
def get_wallet_or_error(self, wallet_id: str) -> Wallet:
for wallet in self.wallets:
if wallet.id == wallet_id:
return wallet
raise ValueError(f"Couldn't find wallet: {wallet_id}.")
@staticmethod
def get_balance(wallet):
accounts = wallet.accounts
if not accounts:
return 0
return accounts[0].ledger.db.get_balance(wallet=wallet, accounts=accounts)
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@property
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def ledger(self) -> Ledger:
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return self.default_account.ledger
@property
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def db(self) -> Database:
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return self.ledger.db
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def check_locked(self):
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return self.default_wallet.is_locked
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@staticmethod
def migrate_lbryum_to_torba(path):
if not os.path.exists(path):
return None, None
with open(path, 'r') as f:
unmigrated_json = f.read()
unmigrated = json.loads(unmigrated_json)
# TODO: After several public releases of new torba based wallet, we can delete
# this lbryum->torba conversion code and require that users who still
# have old structured wallets install one of the earlier releases that
# still has the below conversion code.
if 'master_public_keys' not in unmigrated:
return None, None
total = unmigrated.get('addr_history')
receiving_addresses, change_addresses = set(), set()
for _, unmigrated_account in unmigrated.get('accounts', {}).items():
receiving_addresses.update(map(unhexlify, unmigrated_account.get('receiving', [])))
change_addresses.update(map(unhexlify, unmigrated_account.get('change', [])))
log.info("Wallet migrator found %s receiving addresses and %s change addresses. %s in total on history.",
len(receiving_addresses), len(change_addresses), len(total))
migrated_json = json.dumps({
'version': 1,
'name': 'My Wallet',
'accounts': [{
'version': 1,
'name': 'Main Account',
'ledger': 'lbc_mainnet',
'encrypted': unmigrated['use_encryption'],
'seed': unmigrated['seed'],
'seed_version': unmigrated['seed_version'],
'private_key': unmigrated['master_private_keys']['x/'],
'public_key': unmigrated['master_public_keys']['x/'],
'certificates': unmigrated.get('claim_certificates', {}),
'address_generator': {
'name': 'deterministic-chain',
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'receiving': {'gap': 20, 'maximum_uses_per_address': 1},
'change': {'gap': 6, 'maximum_uses_per_address': 1}
}
}]
}, indent=4, sort_keys=True)
mode = os.stat(path).st_mode
i = 1
backup_path_template = os.path.join(os.path.dirname(path), "old_lbryum_wallet") + "_%i"
while os.path.isfile(backup_path_template % i):
i += 1
os.rename(path, backup_path_template % i)
temp_path = f"{path}.tmp.{os.getpid()}"
with open(temp_path, "w") as f:
f.write(migrated_json)
f.flush()
os.fsync(f.fileno())
os.rename(temp_path, path)
os.chmod(path, mode)
return receiving_addresses, change_addresses
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@classmethod
async def from_lbrynet_config(cls, config: Config):
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ledger_id = {
'lbrycrd_main': 'lbc_mainnet',
'lbrycrd_testnet': 'lbc_testnet',
'lbrycrd_regtest': 'lbc_regtest'
}[config.blockchain_name]
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ledger_config = {
'auto_connect': True,
'default_servers': config.lbryum_servers,
'data_path': config.wallet_dir,
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}
wallets_directory = os.path.join(config.wallet_dir, 'wallets')
if not os.path.exists(wallets_directory):
os.mkdir(wallets_directory)
receiving_addresses, change_addresses = cls.migrate_lbryum_to_torba(
os.path.join(wallets_directory, 'default_wallet')
)
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manager = cls.from_config({
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'ledgers': {ledger_id: ledger_config},
'wallets': [
os.path.join(wallets_directory, wallet_file) for wallet_file in config.wallets
]
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})
manager.config = config
ledger = manager.get_or_create_ledger(ledger_id)
ledger.coin_selection_strategy = config.coin_selection_strategy
default_wallet = manager.default_wallet
if default_wallet.default_account is None:
log.info('Wallet at %s is empty, generating a default account.', default_wallet.id)
default_wallet.generate_account(ledger)
default_wallet.save()
if default_wallet.is_locked and default_wallet.preferences.get(ENCRYPT_ON_DISK) is None:
default_wallet.preferences[ENCRYPT_ON_DISK] = True
default_wallet.save()
if receiving_addresses or change_addresses:
if not os.path.exists(ledger.path):
os.mkdir(ledger.path)
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await ledger.db.open()
try:
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await manager._migrate_addresses(receiving_addresses, change_addresses)
finally:
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await ledger.db.close()
return manager
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async def reset(self):
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self.ledger.config = {
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'auto_connect': True,
'default_servers': self.config.lbryum_servers,
'data_path': self.config.wallet_dir,
}
await self.ledger.stop()
await self.ledger.start()
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async def _migrate_addresses(self, receiving_addresses: set, change_addresses: set):
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async with self.default_account.receiving.address_generator_lock:
migrated_receiving = set(await self.default_account.receiving._generate_keys(0, len(receiving_addresses)))
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async with self.default_account.change.address_generator_lock:
migrated_change = set(await self.default_account.change._generate_keys(0, len(change_addresses)))
receiving_addresses = set(map(self.default_account.ledger.public_key_to_address, receiving_addresses))
change_addresses = set(map(self.default_account.ledger.public_key_to_address, change_addresses))
if not any(change_addresses.difference(migrated_change)):
log.info("Successfully migrated %s change addresses.", len(change_addresses))
else:
log.warning("Failed to migrate %s change addresses!",
len(set(change_addresses).difference(set(migrated_change))))
if not any(receiving_addresses.difference(migrated_receiving)):
log.info("Successfully migrated %s receiving addresses.", len(receiving_addresses))
else:
log.warning("Failed to migrate %s receiving addresses!",
len(set(receiving_addresses).difference(set(migrated_receiving))))
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async def get_best_blockhash(self):
if len(self.ledger.headers) <= 0:
return self.ledger.genesis_hash
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return (await self.ledger.headers.hash(self.ledger.headers.height)).decode()
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def get_unused_address(self):
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return self.default_account.receiving.get_or_create_usable_address()
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async def get_transaction(self, txid):
tx = await self.db.get_transaction(txid=txid)
if not tx:
try:
raw = await self.ledger.network.get_transaction(txid)
height = await self.ledger.network.get_transaction_height(txid)
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except CodeMessageError as e:
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if 'No such mempool or blockchain transaction.' in e.message:
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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tx = Transaction(unhexlify(raw))
await self.ledger.maybe_verify_transaction(tx, height)
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return tx
async def create_purchase_transaction(
self, accounts: List[Account], txo: Output, exchange: 'ExchangeRateManager',
override_max_key_fee=False):
fee = txo.claim.stream.fee
fee_amount = exchange.to_dewies(fee.currency, fee.amount)
if not override_max_key_fee and self.config.max_key_fee:
max_fee = self.config.max_key_fee
max_fee_amount = exchange.to_dewies(max_fee['currency'], Decimal(max_fee['amount']))
if max_fee_amount and fee_amount > max_fee_amount:
error_fee = f"{dewies_to_lbc(fee_amount)} LBC"
if fee.currency != 'LBC':
error_fee += f" ({fee.amount} {fee.currency})"
error_max_fee = f"{dewies_to_lbc(max_fee_amount)} LBC"
if max_fee['currency'] != 'LBC':
error_max_fee += f" ({max_fee['amount']} {max_fee['currency']})"
raise KeyFeeAboveMaxAllowedError(
f"Purchase price of {error_fee} exceeds maximum "
f"configured price of {error_max_fee}."
)
fee_address = fee.address or txo.get_address(self.ledger)
return await Transaction.purchase(
txo.claim_id, fee_amount, fee_address, accounts, accounts[0]
)
async def broadcast_or_release(self, tx, blocking=False):
try:
await self.ledger.broadcast(tx)
if blocking:
await self.ledger.wait(tx, timeout=None)
except:
await self.ledger.release_tx(tx)
raise