lbry-sdk/lbry/wallet/ledger.py

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Python
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import os
import zlib
import base64
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import asyncio
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import logging
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from io import StringIO
from datetime import datetime
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from functools import partial
from operator import itemgetter
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from collections import namedtuple, defaultdict
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from binascii import hexlify, unhexlify
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from typing import Dict, Tuple, Type, Iterable, List, Optional, DefaultDict
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import pylru
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from lbry.schema.result import Outputs
from lbry.schema.url import URL
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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 .constants import TXO_TYPES, COIN, NULL_HASH32
from .bip32 import PubKey, PrivateKey
from .coinselection import CoinSelector
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log = logging.getLogger(__name__)
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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('TransactionEvent', ('address', 'tx'))):
pass
class AddressesGeneratedEvent(namedtuple('AddressesGeneratedEvent', ('address_manager', 'addresses'))):
pass
class BlockHeightEvent(namedtuple('BlockHeightEvent', ('height', 'change'))):
pass
class TransactionCacheItem:
__slots__ = '_tx', 'lock', 'has_tx'
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
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@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):
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name = 'LBRY Credits'
symbol = 'LBC'
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network_name = 'mainnet'
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headers_class = Headers
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secret_prefix = bytes((0x1c,))
pubkey_address_prefix = bytes((0x55,))
script_address_prefix = bytes((0x7a,))
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extended_public_key_prefix = unhexlify('0488b21e')
extended_private_key_prefix = unhexlify('0488ade4')
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max_target = 0x0000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
genesis_hash = '9c89283ba0f3227f6c03b70216b9f665f0118d5e0fa729cedf4fb34d6a34f463'
genesis_bits = 0x1f00ffff
target_timespan = 150
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default_fee_per_byte = 50
default_fee_per_name_char = 200000
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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.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(100000)
self._update_tasks = TaskGroup()
self._utxo_reservation_lock = asyncio.Lock()
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.coin_selection_strategy = None
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)
self._balance_cache = pylru.lrucache(100000)
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@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):
async with self._utxo_reservation_lock:
txos = await self.get_effective_amount_estimators(funding_accounts)
fee = Output.pay_pubkey_hash(COIN, NULL_HASH32).get_fee(self)
selector = CoinSelector(amount, fee)
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)
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'] 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()
])
first_connection = self.network.on_connected.first
asyncio.ensure_future(self.network.start())
await first_connection
async with self._header_processing_lock:
await self._update_tasks.add(self.initial_headers_sync())
await self._on_ready_controller.stream.first
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.")
async with self._header_processing_lock:
await self.update_headers()
await self.subscribe_accounts()
await self._update_tasks.done.wait()
self._on_ready_controller.add(True)
async def stop(self):
self._update_tasks.cancel()
await self._update_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):
target = self.network.remote_height + 1
current = len(self.headers)
get_chunk = partial(self.network.retriable_call, self.network.get_headers, count=4096, b64=True)
chunks = [asyncio.create_task(get_chunk(height)) for height in range(current, target, 4096)]
total = 0
async with self.headers.checkpointed_connector() as buffer:
for chunk in chunks:
headers = await chunk
total += buffer.write(
zlib.decompress(base64.b64decode(headers['base64']), wbits=-15, bufsize=600_000)
)
self._download_height = current + total // self.headers.header_size
log.info("Headers sync: %s / %s", self._download_height, target)
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."
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.format(rewound, self.get_id())
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)
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:
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log.info("Subscribe to %i accounts", len(self.accounts))
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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)
)
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async def subscribe_addresses(self, address_manager: AddressManager, addresses: List[str], batch_size: int = 1000):
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if self.network.is_connected and addresses:
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addresses_remaining = list(addresses)
while addresses_remaining:
batch = addresses_remaining[:batch_size]
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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
)
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def process_status_update(self, update):
address, remote_status = update
self._update_tasks.add(self.update_history(address, remote_status))
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async def update_history(self, address, remote_status, address_manager: AddressManager = None):
async with self._address_update_locks[address]:
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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.Future[Transaction]] = []
synced_history = StringIO()
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(asyncio.ensure_future(
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, 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:
return True
log.warning(
"Wallet is out of sync after syncing. Remote: %s with %d items, local: %s with %d items",
remote_status, len(remote_history), local_status, len(local_history)
)
log.warning("local: %s", local_history)
log.warning("remote: %s", remote_history)
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
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)
if tx is None:
# fetch from network
_raw = await self.network.retriable_call(self.network.get_transaction, txid, remote_height)
tx = Transaction(unhexlify(_raw))
cache_item.tx = tx # make sure it's saved before caching it
await self.maybe_verify_transaction(tx, remote_height)
return tx
async def maybe_verify_transaction(self, tx, remote_height):
tx.height = remote_height
if 0 < remote_height < len(self.headers):
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 = self.headers[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):
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))
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=timeout)
if pending:
for record in records:
found = False
_, local_history = await self.get_local_status_and_history(None, history=record['history'])
for txid, local_height in local_history:
if txid == tx.id and local_height >= height:
found = True
if not found:
print(record['history'], addresses, tx.id)
raise asyncio.TimeoutError('Timed out waiting for transaction.')
async def _inflate_outputs(self, query, accounts):
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outputs = Outputs.from_base64(await query)
txs = []
if len(outputs.txs) > 0:
txs: List[Transaction] = await asyncio.gather(*(
self.cache_transaction(*tx) for tx in outputs.txs
))
if accounts:
priced_claims = []
for tx in txs:
for txo in tx.outputs:
if 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 priced_claims:
txo.purchase_receipt = receipts.get(txo.claim_id)
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return outputs.inflate(txs), outputs.offset, outputs.total
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async def resolve(self, accounts, urls):
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resolve = partial(self.network.retriable_call, self.network.resolve)
txos = (await self._inflate_outputs(resolve(urls), accounts))[0]
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assert len(urls) == len(txos), "Mismatch between urls requested for resolve and responses received."
result = {}
for url, txo in zip(urls, txos):
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if txo and URL.parse(url).has_stream_in_channel:
if not txo.channel or not txo.is_signed_by(txo.channel, self):
txo = None
if txo:
result[url] = txo
else:
result[url] = {'error': f'{url} did not resolve to a claim'}
return result
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async def claim_search(self, accounts, **kwargs) -> Tuple[List[Output], int, int]:
return await self._inflate_outputs(self.network.claim_search(**kwargs), accounts)
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async def get_claim_by_claim_id(self, accounts, claim_id) -> Output:
for claim in (await self.claim_search(accounts, claim_id=claim_id))[0]:
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return claim
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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)
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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:')
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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]
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@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)
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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)
def get_claims(self, **constraints):
return self.db.get_claims(**constraints)
def get_claim_count(self, **constraints):
return self.db.get_claim_count(**constraints)
def get_streams(self, **constraints):
return self.db.get_streams(**constraints)
def get_stream_count(self, **constraints):
return self.db.get_stream_count(**constraints)
def get_channels(self, **constraints):
return self.db.get_channels(**constraints)
def get_channel_count(self, **constraints):
return self.db.get_channel_count(**constraints)
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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)
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except Exception as err:
if isinstance(err, asyncio.CancelledError): # TODO: remove when updated to 3.8
raise
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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):
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collections = await self.db.get_collections(**constraints)
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if resolve_claims > 0:
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for collection in collections:
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collection.claims = await self.resolve_collection(collection, page_size=resolve_claims)
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return collections
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def get_collection_count(self, resolve_claims=0, **constraints):
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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, **constraints):
txs: List[Transaction] = await self.db.get_transactions(**constraints)
headers = self.headers
history = []
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for tx in txs: # pylint: disable=too-many-nested-blocks
ts = headers[tx.height]['timestamp'] if tx.height > 0 else None
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_account 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
})
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
})
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
})
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
})
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
})
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
})
history.append(item)
return history
def get_transaction_history_count(self, **constraints):
return self.db.get_transaction_count(**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
}
}
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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
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return result
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class TestNetLedger(Ledger):
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network_name = 'testnet'
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pubkey_address_prefix = bytes((111,))
script_address_prefix = bytes((196,))
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extended_public_key_prefix = unhexlify('043587cf')
extended_private_key_prefix = unhexlify('04358394')
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class RegTestLedger(Ledger):
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network_name = 'regtest'
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headers_class = UnvalidatedHeaders
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pubkey_address_prefix = bytes((111,))
script_address_prefix = bytes((196,))
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extended_public_key_prefix = unhexlify('043587cf')
extended_private_key_prefix = unhexlify('04358394')
max_target = 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
genesis_hash = '6e3fcf1299d4ec5d79c3a4c91d624a4acf9e2e173d95a1a0504f677669687556'
genesis_bits = 0x207fffff
target_timespan = 1