1246 lines
54 KiB
Python
1246 lines
54 KiB
Python
import os
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import copy
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import time
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import asyncio
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import logging
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from datetime import datetime
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from functools import partial
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from operator import itemgetter
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from collections import defaultdict
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from binascii import hexlify, unhexlify
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from typing import Dict, Tuple, Type, Iterable, List, Optional, DefaultDict, NamedTuple
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from scribe.schema.result import Outputs, INVALID, NOT_FOUND
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from scribe.schema.url import URL
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from lbry.crypto.hash import hash160, double_sha256, sha256
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from lbry.crypto.base58 import Base58
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from lbry.utils import LRUCacheWithMetrics
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from lbry.wallet.tasks import TaskGroup
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from lbry.wallet.database import Database
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from lbry.wallet.stream import StreamController
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from lbry.wallet.dewies import dewies_to_lbc
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from lbry.wallet.account import Account, AddressManager, SingleKey
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from lbry.wallet.network import Network
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from lbry.wallet.transaction import Transaction, Output
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from lbry.wallet.header import Headers, UnvalidatedHeaders
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from lbry.wallet.checkpoints import HASHES
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from lbry.wallet.constants import TXO_TYPES, CLAIM_TYPES, COIN, NULL_HASH32
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from scribe.schema.bip32 import PublicKey, PrivateKey
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from lbry.wallet.coinselection import CoinSelector
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log = logging.getLogger(__name__)
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LedgerType = Type['BaseLedger']
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class LedgerRegistry(type):
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ledgers: Dict[str, LedgerType] = {}
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def __new__(mcs, name, bases, attrs):
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cls: LedgerType = super().__new__(mcs, name, bases, attrs)
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if not (name == 'BaseLedger' and not bases):
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ledger_id = cls.get_id()
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assert ledger_id not in mcs.ledgers, \
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f'Ledger with id "{ledger_id}" already registered.'
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mcs.ledgers[ledger_id] = cls
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return cls
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@classmethod
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def get_ledger_class(mcs, ledger_id: str) -> LedgerType:
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return mcs.ledgers[ledger_id]
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class TransactionEvent(NamedTuple):
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address: str
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tx: Transaction
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class AddressesGeneratedEvent(NamedTuple):
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address_manager: AddressManager
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addresses: List[str]
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class BlockHeightEvent(NamedTuple):
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height: int
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change: int
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class TransactionCacheItem:
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__slots__ = '_tx', 'lock', 'has_tx', 'pending_verifications'
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def __init__(self, tx: Optional[Transaction] = None, lock: Optional[asyncio.Lock] = None):
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self.has_tx = asyncio.Event()
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self.lock = lock or asyncio.Lock()
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self._tx = self.tx = tx
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self.pending_verifications = 0
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@property
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def tx(self) -> Optional[Transaction]:
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return self._tx
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@tx.setter
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def tx(self, tx: Transaction):
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self._tx = tx
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if tx is not None:
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self.has_tx.set()
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class Ledger(metaclass=LedgerRegistry):
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name = 'LBRY Credits'
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symbol = 'LBC'
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network_name = 'mainnet'
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headers_class = Headers
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secret_prefix = bytes((0x1c,))
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pubkey_address_prefix = bytes((0x55,))
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script_address_prefix = bytes((0x7a,))
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extended_public_key_prefix = unhexlify('0488b21e')
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extended_private_key_prefix = unhexlify('0488ade4')
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max_target = 0x0000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
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genesis_hash = '9c89283ba0f3227f6c03b70216b9f665f0118d5e0fa729cedf4fb34d6a34f463'
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genesis_bits = 0x1f00ffff
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target_timespan = 150
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default_fee_per_byte = 50
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default_fee_per_name_char = 200000
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checkpoints = HASHES
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def __init__(self, config=None):
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self.config = config or {}
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self.db: Database = self.config.get('db') or Database(
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os.path.join(self.path, "blockchain.db")
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)
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self.db.ledger = self
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self.headers: Headers = self.config.get('headers') or self.headers_class(
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os.path.join(self.path, "headers")
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)
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self.headers.checkpoints = self.checkpoints
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self.network: Network = self.config.get('network') or Network(self)
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self.network.on_header.listen(self.receive_header)
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self.network.on_status.listen(self.process_status_update)
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self.accounts = []
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self.fee_per_byte: int = self.config.get('fee_per_byte', self.default_fee_per_byte)
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self._on_transaction_controller = StreamController()
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self.on_transaction = self._on_transaction_controller.stream
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self.on_transaction.listen(
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lambda e: log.info(
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'(%s) on_transaction: address=%s, height=%s, is_verified=%s, tx.id=%s',
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self.get_id(), e.address, e.tx.height, e.tx.is_verified, e.tx.id
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)
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)
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self._on_address_controller = StreamController()
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self.on_address = self._on_address_controller.stream
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self.on_address.listen(
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lambda e: log.info('(%s) on_address: %s', self.get_id(), e.addresses)
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)
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self._on_header_controller = StreamController()
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self.on_header = self._on_header_controller.stream
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self.on_header.listen(
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lambda change: log.info(
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'%s: added %s header blocks, final height %s',
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self.get_id(), change, self.headers.height
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)
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)
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self._download_height = 0
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self._on_ready_controller = StreamController()
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self.on_ready = self._on_ready_controller.stream
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self._tx_cache = LRUCacheWithMetrics(self.config.get("tx_cache_size", 1024), metric_name='tx')
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self._update_tasks = TaskGroup()
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self._other_tasks = TaskGroup() # that we dont need to start
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self._utxo_reservation_lock = asyncio.Lock()
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self._header_processing_lock = asyncio.Lock()
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self._address_update_locks: DefaultDict[str, asyncio.Lock] = defaultdict(asyncio.Lock)
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self._history_lock = asyncio.Lock()
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self.coin_selection_strategy = None
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self._known_addresses_out_of_sync = set()
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self.fee_per_name_char = self.config.get('fee_per_name_char', self.default_fee_per_name_char)
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self._balance_cache = LRUCacheWithMetrics(2 ** 15)
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@classmethod
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def get_id(cls):
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return '{}_{}'.format(cls.symbol.lower(), cls.network_name.lower())
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@classmethod
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def hash160_to_address(cls, h160):
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raw_address = cls.pubkey_address_prefix + h160
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return Base58.encode(bytearray(raw_address + double_sha256(raw_address)[0:4]))
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@classmethod
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def hash160_to_script_address(cls, h160):
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raw_address = cls.script_address_prefix + h160
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return Base58.encode(bytearray(raw_address + double_sha256(raw_address)[0:4]))
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@staticmethod
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def address_to_hash160(address):
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return Base58.decode(address)[1:21]
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@classmethod
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def is_pubkey_address(cls, address):
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decoded = Base58.decode_check(address)
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return decoded[0] == cls.pubkey_address_prefix[0]
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@classmethod
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def is_script_address(cls, address):
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decoded = Base58.decode_check(address)
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return decoded[0] == cls.script_address_prefix[0]
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@classmethod
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def public_key_to_address(cls, public_key):
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return cls.hash160_to_address(hash160(public_key))
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@staticmethod
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def private_key_to_wif(private_key):
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return b'\x1c' + private_key + b'\x01'
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@property
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def path(self):
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return os.path.join(self.config['data_path'], self.get_id())
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def add_account(self, account: Account):
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self.accounts.append(account)
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async def _get_account_and_address_info_for_address(self, wallet, address):
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match = await self.db.get_address(accounts=wallet.accounts, address=address)
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if match:
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for account in wallet.accounts:
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if match['account'] == account.public_key.address:
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return account, match
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async def get_private_key_for_address(self, wallet, address) -> Optional[PrivateKey]:
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match = await self._get_account_and_address_info_for_address(wallet, address)
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if match:
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account, address_info = match
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return account.get_private_key(address_info['chain'], address_info['pubkey'].n)
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return None
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async def get_public_key_for_address(self, wallet, address) -> Optional[PublicKey]:
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match = await self._get_account_and_address_info_for_address(wallet, address)
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if match:
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_, address_info = match
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return address_info['pubkey']
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return None
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async def get_account_for_address(self, wallet, address):
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match = await self._get_account_and_address_info_for_address(wallet, address)
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if match:
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return match[0]
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async def get_effective_amount_estimators(self, funding_accounts: Iterable[Account]):
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estimators = []
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for account in funding_accounts:
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utxos = await account.get_utxos(no_tx=True, no_channel_info=True)
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for utxo in utxos:
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estimators.append(utxo.get_estimator(self))
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return estimators
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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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def get_address_count(self, **constraints):
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return self.db.get_address_count(**constraints)
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async def get_spendable_utxos(self, amount: int, funding_accounts: Optional[Iterable['Account']], min_amount=1):
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min_amount = min(amount // 10, min_amount)
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fee = Output.pay_pubkey_hash(COIN, NULL_HASH32).get_fee(self)
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selector = CoinSelector(amount, fee)
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async with self._utxo_reservation_lock:
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if self.coin_selection_strategy == 'sqlite':
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return await self.db.get_spendable_utxos(self, amount + fee, funding_accounts, min_amount=min_amount,
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fee_per_byte=self.fee_per_byte)
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txos = await self.get_effective_amount_estimators(funding_accounts)
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spendables = selector.select(txos, self.coin_selection_strategy)
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if spendables:
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await self.reserve_outputs(s.txo for s in spendables)
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return spendables
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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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def get_utxo_count(self, **constraints):
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self.constraint_spending_utxos(constraints)
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return self.db.get_utxo_count(**constraints)
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async def get_txos(self, resolve=False, **constraints) -> List[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_count(self, **constraints):
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return self.db.get_txo_count(**constraints)
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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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def get_transaction_count(self, **constraints):
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return self.db.get_transaction_count(**constraints)
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async def get_local_status_and_history(self, address, history=None):
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if not history:
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address_details = await self.db.get_address(address=address)
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history = (address_details['history'] if address_details else '') or ''
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parts = history.split(':')[:-1]
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return (
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hexlify(sha256(history.encode())).decode() if history else None,
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list(zip(parts[0::2], map(int, parts[1::2])))
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)
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@staticmethod
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def get_root_of_merkle_tree(branches, branch_positions, working_branch):
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for i, branch in enumerate(branches):
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other_branch = unhexlify(branch)[::-1]
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other_branch_on_left = bool((branch_positions >> i) & 1)
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if other_branch_on_left:
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combined = other_branch + working_branch
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else:
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combined = working_branch + other_branch
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working_branch = double_sha256(combined)
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return hexlify(working_branch[::-1])
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async def start(self):
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if not os.path.exists(self.path):
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os.mkdir(self.path)
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await asyncio.wait([
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self.db.open(),
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self.headers.open()
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])
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fully_synced = self.on_ready.first
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asyncio.create_task(self.network.start())
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await self.network.on_connected.first
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async with self._header_processing_lock:
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await self._update_tasks.add(self.initial_headers_sync())
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self.network.on_connected.listen(self.join_network)
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asyncio.ensure_future(self.join_network())
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await fully_synced
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await self.db.release_all_outputs()
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await asyncio.gather(*(a.maybe_migrate_certificates() for a in self.accounts))
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await asyncio.gather(*(a.save_max_gap() for a in self.accounts))
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if len(self.accounts) > 10:
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log.info("Loaded %i accounts", len(self.accounts))
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else:
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await self._report_state()
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self.on_transaction.listen(self._reset_balance_cache)
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async def join_network(self, *_):
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log.info("Subscribing and updating accounts.")
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await self._update_tasks.add(self.subscribe_accounts())
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await self._update_tasks.done.wait()
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self._on_ready_controller.add(True)
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async def stop(self):
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self._update_tasks.cancel()
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self._other_tasks.cancel()
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await self._update_tasks.done.wait()
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await self._other_tasks.done.wait()
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await self.network.stop()
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await self.db.close()
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await self.headers.close()
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async def tasks_are_done(self):
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await self._update_tasks.done.wait()
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await self._other_tasks.done.wait()
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@property
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def local_height_including_downloaded_height(self):
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return max(self.headers.height, self._download_height)
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async def initial_headers_sync(self):
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get_chunk = partial(self.network.retriable_call, self.network.get_headers, count=1000, b64=True)
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self.headers.chunk_getter = get_chunk
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async def doit():
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for height in reversed(sorted(self.headers.known_missing_checkpointed_chunks)):
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async with self._header_processing_lock:
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await self.headers.ensure_chunk_at(height)
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self._other_tasks.add(doit())
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await self.update_headers()
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async def update_headers(self, height=None, headers=None, subscription_update=False):
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rewound = 0
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while True:
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if height is None or height > len(self.headers):
|
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# sometimes header subscription updates are for a header in the future
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# which can't be connected, so we do a normal header sync instead
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height = len(self.headers)
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headers = None
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subscription_update = False
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if not headers:
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header_response = await self.network.retriable_call(self.network.get_headers, height, 2001)
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headers = header_response['hex']
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if not headers:
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# Nothing to do, network thinks we're already at the latest height.
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return
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added = await self.headers.connect(height, unhexlify(headers))
|
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if added > 0:
|
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height += added
|
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self._on_header_controller.add(
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BlockHeightEvent(self.headers.height, added))
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|
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if rewound > 0:
|
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# we started rewinding blocks and apparently found
|
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# a new chain
|
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rewound = 0
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await self.db.rewind_blockchain(height)
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|
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if subscription_update:
|
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# subscription updates are for latest header already
|
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# so we don't need to check if there are newer / more
|
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# on another loop of update_headers(), just return instead
|
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return
|
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|
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elif added == 0:
|
|
# we had headers to connect but none got connected, probably a reorganization
|
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height -= 1
|
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rewound += 1
|
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log.warning(
|
|
"Blockchain Reorganization: attempting rewind to height %s from starting height %s",
|
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height, height+rewound
|
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)
|
|
self._tx_cache.clear()
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|
|
else:
|
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raise IndexError(f"headers.connect() returned negative number ({added})")
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|
|
|
if height < 0:
|
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raise IndexError(
|
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"Blockchain reorganization rewound all the way back to genesis hash. "
|
|
"Something is very wrong. Maybe you are on the wrong blockchain?"
|
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)
|
|
|
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if rewound >= 100:
|
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raise IndexError(
|
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"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."
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|
.format(rewound, self.get_id())
|
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)
|
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|
|
headers = None # ready to download some more headers
|
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|
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# 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(
|
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height=header['height'], headers=header['hex'], subscription_update=True
|
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)
|
|
|
|
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([
|
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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()
|
|
await account.deterministic_channel_keys.ensure_cache_primed()
|
|
|
|
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:]
|
|
if self.network.client and self.network.client.server_address_and_port:
|
|
log.info("subscribed to %i/%i addresses on %s:%i", len(addresses) - len(addresses_remaining),
|
|
len(addresses), *self.network.client.server_address_and_port)
|
|
if self.network.client and 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,
|
|
reattempt_update: bool = True):
|
|
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:
|
|
remote_missing = set(local_history) - set(remote_history)
|
|
if remote_missing:
|
|
log.warning(
|
|
"%i transactions we have for %s are not in the remote address history",
|
|
len(remote_missing), address
|
|
)
|
|
return True
|
|
|
|
to_request = {}
|
|
pending_synced_history = {}
|
|
already_synced = set()
|
|
|
|
already_synced_offset = 0
|
|
for i, (txid, remote_height) in enumerate(remote_history):
|
|
if i == already_synced_offset and i < len(local_history) and local_history[i] == (txid, remote_height):
|
|
pending_synced_history[i] = f'{txid}:{remote_height}:'
|
|
already_synced.add((txid, remote_height))
|
|
already_synced_offset += 1
|
|
continue
|
|
|
|
tx_indexes = {}
|
|
|
|
for i, (txid, remote_height) in enumerate(remote_history):
|
|
tx_indexes[txid] = i
|
|
if (txid, remote_height) in already_synced:
|
|
continue
|
|
to_request[i] = (txid, remote_height)
|
|
|
|
log.debug(
|
|
"request %i transactions, %i/%i for %s are already synced", len(to_request), len(already_synced),
|
|
len(remote_history), address
|
|
)
|
|
remote_history_txids = {txid for txid, _ in remote_history}
|
|
async for tx in self.request_synced_transactions(to_request, remote_history_txids, address):
|
|
self.maybe_has_channel_key(tx)
|
|
pending_synced_history[tx_indexes[tx.id]] = f"{tx.id}:{tx.height}:"
|
|
if len(pending_synced_history) % 100 == 0:
|
|
log.info("Syncing address %s: %d/%d", address, len(pending_synced_history), len(to_request))
|
|
log.info("Sync finished for address %s: %d/%d", address, len(pending_synced_history), len(to_request))
|
|
|
|
assert len(pending_synced_history) == len(remote_history), \
|
|
f"{len(pending_synced_history)} vs {len(remote_history)} for {address}"
|
|
synced_history = ""
|
|
for remote_i, i in zip(range(len(remote_history)), sorted(pending_synced_history.keys())):
|
|
assert i == remote_i, f"{i} vs {remote_i}"
|
|
txid, height = remote_history[remote_i]
|
|
if f"{txid}:{height}:" != pending_synced_history[i]:
|
|
log.warning("history mismatch: %s vs %s", remote_history[remote_i], pending_synced_history[i])
|
|
synced_history += pending_synced_history[i]
|
|
await self.db.set_address_history(address, synced_history)
|
|
|
|
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)
|
|
|
|
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:
|
|
log.debug("finished syncing transaction history for %s, %i known txs", address, len(local_history))
|
|
return True
|
|
|
|
async def maybe_verify_transaction(self, tx, remote_height, merkle=None):
|
|
tx.height = remote_height
|
|
if 0 < remote_height < len(self.headers):
|
|
# 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)
|
|
if 'merkle' not in merkle:
|
|
return
|
|
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']
|
|
return tx
|
|
|
|
def maybe_has_channel_key(self, tx):
|
|
for txo in tx._outputs:
|
|
if txo.can_decode_claim and txo.claim.is_channel:
|
|
for account in self.accounts:
|
|
account.deterministic_channel_keys.maybe_generate_deterministic_key_for_channel(txo)
|
|
|
|
async def request_transactions(self, to_request: Tuple[Tuple[str, int], ...], cached=False):
|
|
batches = [[]]
|
|
remote_heights = {}
|
|
cache_hits = set()
|
|
|
|
for txid, height in sorted(to_request, key=lambda x: x[1]):
|
|
if cached:
|
|
cached_tx = self._tx_cache.get(txid)
|
|
if cached_tx is not None:
|
|
if cached_tx.tx is not None and cached_tx.tx.is_verified:
|
|
cache_hits.add(txid)
|
|
continue
|
|
else:
|
|
self._tx_cache[txid] = TransactionCacheItem()
|
|
remote_heights[txid] = height
|
|
if len(batches[-1]) == 100:
|
|
batches.append([])
|
|
batches[-1].append(txid)
|
|
if not batches[-1]:
|
|
batches.pop()
|
|
if cached and cache_hits:
|
|
yield {txid: self._tx_cache[txid].tx for txid in cache_hits}
|
|
|
|
for batch in batches:
|
|
txs = await self._single_batch(batch, remote_heights)
|
|
if cached:
|
|
for txid, tx in txs.items():
|
|
self._tx_cache[txid].tx = tx
|
|
yield txs
|
|
|
|
async def request_synced_transactions(self, to_request, remote_history, address):
|
|
async for txs in self.request_transactions(((txid, height) for txid, height in to_request.values())):
|
|
for tx in txs.values():
|
|
yield tx
|
|
await self._sync_and_save_batch(address, remote_history, txs)
|
|
|
|
async def _single_batch(self, batch, remote_heights):
|
|
heights = {remote_heights[txid] for txid in batch}
|
|
unrestriced = 0 < min(heights) < max(heights) < max(self.headers.checkpoints or [0])
|
|
batch_result = await self.network.retriable_call(self.network.get_transaction_batch, batch, not unrestriced)
|
|
txs = {}
|
|
for txid, (raw, merkle) in batch_result.items():
|
|
remote_height = remote_heights[txid]
|
|
tx = Transaction(unhexlify(raw), height=remote_height)
|
|
txs[tx.id] = tx
|
|
await self.maybe_verify_transaction(tx, remote_height, merkle)
|
|
return txs
|
|
|
|
async def _sync_and_save_batch(self, address, remote_history, pending_txs):
|
|
await asyncio.gather(*(self._sync(tx, remote_history, pending_txs) for tx in pending_txs.values()))
|
|
await self.db.save_transaction_io_batch(
|
|
pending_txs.values(), address, self.address_to_hash160(address), ""
|
|
)
|
|
while pending_txs:
|
|
self._on_transaction_controller.add(TransactionEvent(address, pending_txs.popitem()[1]))
|
|
|
|
async def _sync(self, tx, remote_history, pending_txs):
|
|
check_db_for_txos = {}
|
|
for txi in tx.inputs:
|
|
if txi.txo_ref.txo is not None:
|
|
continue
|
|
wanted_txid = txi.txo_ref.tx_ref.id
|
|
if wanted_txid not in remote_history:
|
|
continue
|
|
if wanted_txid in pending_txs:
|
|
txi.txo_ref = pending_txs[wanted_txid].outputs[txi.txo_ref.position].ref
|
|
else:
|
|
check_db_for_txos[txi] = 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=list(check_db_for_txos.values()), order_by='txo.txoid', no_tx=True
|
|
)
|
|
}
|
|
|
|
for txi in check_db_for_txos:
|
|
if txi.txo_ref.id in referenced_txos:
|
|
txi.txo_ref = referenced_txos[txi.txo_ref.id].ref
|
|
else:
|
|
tx_from_db = await self.db.get_transaction(txid=txi.txo_ref.tx_ref.id)
|
|
if tx_from_db is None:
|
|
log.warning("%s not on db, not on cache, but on remote history!", txi.txo_ref.id)
|
|
else:
|
|
txi.txo_ref = tx_from_db.outputs[txi.txo_ref.position].ref
|
|
return tx
|
|
|
|
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.is_pubkey_hash:
|
|
addresses.add(self.hash160_to_address(txo.pubkey_hash))
|
|
elif txo.is_script_hash:
|
|
addresses.add(self.hash160_to_script_address(txo.script_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(f'Timed out waiting for transaction. {tx.id}')
|
|
|
|
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 or (local_height == 0 and height > local_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,
|
|
hub_server=False) -> Tuple[List[Output], dict, int, int]:
|
|
encoded_outputs = await query
|
|
if hub_server:
|
|
outputs = Outputs.from_grpc(encoded_outputs)
|
|
else:
|
|
outputs = Outputs.from_base64(encoded_outputs or '') # TODO: why is the server returning None?
|
|
txs: List[Transaction] = []
|
|
if len(outputs.txs) > 0:
|
|
async for tx in self.request_transactions(tuple(outputs.txs), cached=True):
|
|
txs.extend(tx.values())
|
|
|
|
_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, new_sdk_server=None, **kwargs):
|
|
txos = []
|
|
urls_copy = list(urls)
|
|
if new_sdk_server:
|
|
resolve = partial(self.network.new_resolve, new_sdk_server)
|
|
else:
|
|
resolve = partial(self.network.retriable_call, self.network.resolve)
|
|
while urls_copy:
|
|
batch, urls_copy = urls_copy[:100], urls_copy[100:]
|
|
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 sum_supports(self, new_sdk_server, **kwargs) -> List[Dict]:
|
|
return await self.network.sum_supports(new_sdk_server, **kwargs)
|
|
|
|
async def claim_search(
|
|
self, accounts, include_purchase_receipt=False, include_is_my_output=False,
|
|
new_sdk_server=None, **kwargs) -> Tuple[List[Output], dict, int, int]:
|
|
if new_sdk_server:
|
|
claim_search = partial(self.network.new_claim_search, new_sdk_server)
|
|
else:
|
|
claim_search = self.network.claim_search
|
|
return await self._inflate_outputs(
|
|
claim_search(**kwargs), accounts,
|
|
include_purchase_receipt=include_purchase_receipt,
|
|
include_is_my_output=include_is_my_output,
|
|
hub_server=new_sdk_server is not None
|
|
)
|
|
|
|
# async def get_claim_by_claim_id(self, accounts, claim_id, **kwargs) -> Output:
|
|
# return await self.network.get_claim_by_id(claim_id)
|
|
|
|
async def get_claim_by_claim_id(self, claim_id, accounts=None, include_purchase_receipt=False,
|
|
include_is_my_output=False):
|
|
accounts = accounts or []
|
|
# return await self.network.get_claim_by_id(claim_id)
|
|
inflated = await self._inflate_outputs(
|
|
self.network.get_claim_by_id(claim_id), accounts,
|
|
include_purchase_receipt=include_purchase_receipt,
|
|
include_is_my_output=include_is_my_output,
|
|
)
|
|
txos = inflated[0]
|
|
if txos:
|
|
return txos[0]
|
|
|
|
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):
|
|
txos = await self._resolve_for_local_claim_results(accounts, txos)
|
|
txos = await self._resolve_for_local_support_results(accounts, txos)
|
|
return txos
|
|
|
|
async def _resolve_for_local_claim_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 _resolve_for_local_support_results(self, accounts, txos):
|
|
channel_ids = set()
|
|
signed_support_txos = []
|
|
for txo in txos:
|
|
support = txo.can_decode_support
|
|
if support and support.signing_channel_id:
|
|
channel_ids.add(support.signing_channel_id)
|
|
signed_support_txos.append(txo)
|
|
if channel_ids:
|
|
channels = {
|
|
channel.claim_id: channel for channel in
|
|
(await self.claim_search(accounts, claim_ids=list(channel_ids)))[0]
|
|
}
|
|
for txo in signed_support_txos:
|
|
txo.channel = channels.get(txo.support.signing_channel_id)
|
|
return txos
|
|
|
|
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, resolve=False, **constraints):
|
|
collections = await self.db.get_collections(**constraints)
|
|
if resolve:
|
|
collections = await self._resolve_for_local_results(constraints.get('accounts', []), collections)
|
|
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)
|
|
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 = {}
|