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