1108 lines
48 KiB
Python
1108 lines
48 KiB
Python
# Copyright (c) 2016, Neil Booth
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# Copyright (c) 2017, the ElectrumX authors
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#
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# All rights reserved.
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#
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# See the file "LICENCE" for information about the copyright
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# and warranty status of this software.
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"""Interface to the blockchain database."""
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import asyncio
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import array
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import time
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import typing
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import struct
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import attr
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import zlib
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import base64
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from typing import Optional, Iterable, Tuple, DefaultDict, Set, Dict, List
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from functools import partial
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from asyncio import sleep
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from bisect import bisect_right
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from collections import defaultdict
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from lbry.utils import LRUCacheWithMetrics
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from lbry.schema.url import URL
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from lbry.wallet.server import util
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from lbry.wallet.server.hash import hash_to_hex_str
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from lbry.wallet.server.tx import TxInput
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from lbry.wallet.server.merkle import Merkle, MerkleCache
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from lbry.wallet.server.storage import db_class
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from lbry.wallet.server.db import DB_PREFIXES
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from lbry.wallet.server.db.common import ResolveResult, STREAM_TYPES, CLAIM_TYPES
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from lbry.wallet.server.db.prefixes import Prefixes, PendingActivationValue, ClaimTakeoverValue, ClaimToTXOValue
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from lbry.wallet.server.db.prefixes import ACTIVATED_CLAIM_TXO_TYPE, ACTIVATED_SUPPORT_TXO_TYPE
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from lbry.wallet.server.db.prefixes import PendingActivationKey, TXOToClaimValue
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from lbry.wallet.transaction import OutputScript
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from lbry.schema.claim import Claim, guess_stream_type
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from lbry.wallet.ledger import Ledger, RegTestLedger, TestNetLedger
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from lbry.wallet.server.db.elasticsearch import SearchIndex
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class UTXO(typing.NamedTuple):
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tx_num: int
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tx_pos: int
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tx_hash: bytes
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height: int
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value: int
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TXO_STRUCT = struct.Struct(b'>LH')
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TXO_STRUCT_unpack = TXO_STRUCT.unpack
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TXO_STRUCT_pack = TXO_STRUCT.pack
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@attr.s(slots=True)
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class FlushData:
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height = attr.ib()
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tx_count = attr.ib()
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put_and_delete_ops = attr.ib()
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tip = attr.ib()
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OptionalResolveResultOrError = Optional[typing.Union[ResolveResult, LookupError, ValueError]]
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DB_STATE_STRUCT = struct.Struct(b'>32sLL32sLLBBlll')
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DB_STATE_STRUCT_SIZE = 94
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class DBState(typing.NamedTuple):
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genesis: bytes
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height: int
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tx_count: int
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tip: bytes
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utxo_flush_count: int
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wall_time: int
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first_sync: bool
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db_version: int
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hist_flush_count: int
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comp_flush_count: int
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comp_cursor: int
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def pack(self) -> bytes:
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return DB_STATE_STRUCT.pack(
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self.genesis, self.height, self.tx_count, self.tip, self.utxo_flush_count,
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self.wall_time, 1 if self.first_sync else 0, self.db_version, self.hist_flush_count,
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self.comp_flush_count, self.comp_cursor
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)
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@classmethod
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def unpack(cls, packed: bytes) -> 'DBState':
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return cls(*DB_STATE_STRUCT.unpack(packed[:DB_STATE_STRUCT_SIZE]))
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class DBError(Exception):
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"""Raised on general DB errors generally indicating corruption."""
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class LevelDB:
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DB_VERSIONS = HIST_DB_VERSIONS = [7]
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def __init__(self, env):
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self.logger = util.class_logger(__name__, self.__class__.__name__)
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self.env = env
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self.coin = env.coin
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self.logger.info(f'switching current directory to {env.db_dir}')
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self.db_class = db_class(env.db_dir, self.env.db_engine)
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self.db = None
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self.hist_unflushed = defaultdict(partial(array.array, 'I'))
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self.hist_unflushed_count = 0
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self.hist_flush_count = 0
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self.hist_comp_flush_count = -1
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self.hist_comp_cursor = -1
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self.tx_counts = None
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self.headers = None
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self.encoded_headers = LRUCacheWithMetrics(1 << 21, metric_name='encoded_headers', namespace='wallet_server')
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self.last_flush = time.time()
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self.logger.info(f'using {self.env.db_engine} for DB backend')
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# Header merkle cache
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self.merkle = Merkle()
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self.header_mc = MerkleCache(self.merkle, self.fs_block_hashes)
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self._tx_and_merkle_cache = LRUCacheWithMetrics(2 ** 17, metric_name='tx_and_merkle', namespace="wallet_server")
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self.total_transactions = None
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self.transaction_num_mapping = {}
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# Search index
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self.search_index = SearchIndex(
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self.env.es_index_prefix, self.env.database_query_timeout,
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elastic_host=env.elastic_host, elastic_port=env.elastic_port
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)
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self.genesis_bytes = bytes.fromhex(self.coin.GENESIS_HASH)
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if env.coin.NET == 'mainnet':
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self.ledger = Ledger
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elif env.coin.NET == 'testnet':
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self.ledger = TestNetLedger
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else:
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self.ledger = RegTestLedger
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def get_claim_from_txo(self, tx_num: int, tx_idx: int) -> Optional[TXOToClaimValue]:
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claim_hash_and_name = self.db.get(Prefixes.txo_to_claim.pack_key(tx_num, tx_idx))
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if not claim_hash_and_name:
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return
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return Prefixes.txo_to_claim.unpack_value(claim_hash_and_name)
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def get_repost(self, claim_hash) -> Optional[bytes]:
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repost = self.db.get(Prefixes.repost.pack_key(claim_hash))
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if repost:
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return Prefixes.repost.unpack_value(repost).reposted_claim_hash
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return
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def get_reposted_count(self, claim_hash: bytes) -> int:
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cnt = 0
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for _ in self.db.iterator(prefix=Prefixes.reposted_claim.pack_partial_key(claim_hash)):
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cnt += 1
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return cnt
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def get_activation(self, tx_num, position, is_support=False) -> int:
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activation = self.db.get(
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Prefixes.activated.pack_key(
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ACTIVATED_SUPPORT_TXO_TYPE if is_support else ACTIVATED_CLAIM_TXO_TYPE, tx_num, position
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)
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)
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if activation:
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return Prefixes.activated.unpack_value(activation).height
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return -1
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def get_supported_claim_from_txo(self, tx_num: int, position: int) -> typing.Tuple[Optional[bytes], Optional[int]]:
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key = Prefixes.support_to_claim.pack_key(tx_num, position)
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supported_claim_hash = self.db.get(key)
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if supported_claim_hash:
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packed_support_amount = self.db.get(
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Prefixes.claim_to_support.pack_key(supported_claim_hash, tx_num, position)
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)
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if packed_support_amount:
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return supported_claim_hash, Prefixes.claim_to_support.unpack_value(packed_support_amount).amount
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return None, None
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def get_support_amount(self, claim_hash: bytes):
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total = 0
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for packed in self.db.iterator(prefix=DB_PREFIXES.claim_to_support.value + claim_hash, include_key=False):
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total += Prefixes.claim_to_support.unpack_value(packed).amount
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return total
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def get_supports(self, claim_hash: bytes):
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supports = []
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for k, v in self.db.iterator(prefix=DB_PREFIXES.claim_to_support.value + claim_hash):
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unpacked_k = Prefixes.claim_to_support.unpack_key(k)
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unpacked_v = Prefixes.claim_to_support.unpack_value(v)
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supports.append((unpacked_k.tx_num, unpacked_k.position, unpacked_v.amount))
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return supports
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def get_short_claim_id_url(self, name: str, claim_hash: bytes, root_tx_num: int, root_position: int) -> str:
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claim_id = claim_hash.hex()
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for prefix_len in range(10):
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prefix = Prefixes.claim_short_id.pack_partial_key(name, claim_id[:prefix_len+1])
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for _k in self.db.iterator(prefix=prefix, include_value=False):
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k = Prefixes.claim_short_id.unpack_key(_k)
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if k.root_tx_num == root_tx_num and k.root_position == root_position:
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return f'{name}#{k.partial_claim_id}'
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break
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print(f"{claim_id} has a collision")
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return f'{name}#{claim_id}'
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def _prepare_resolve_result(self, tx_num: int, position: int, claim_hash: bytes, name: str, root_tx_num: int,
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root_position: int, activation_height: int, signature_valid: bool) -> ResolveResult:
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controlling_claim = self.get_controlling_claim(name)
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tx_hash = self.total_transactions[tx_num]
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height = bisect_right(self.tx_counts, tx_num)
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created_height = bisect_right(self.tx_counts, root_tx_num)
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last_take_over_height = controlling_claim.height
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expiration_height = self.coin.get_expiration_height(height)
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support_amount = self.get_support_amount(claim_hash)
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claim_amount = self.get_claim_txo_amount(claim_hash)
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effective_amount = support_amount + claim_amount
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channel_hash = self.get_channel_for_claim(claim_hash, tx_num, position)
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reposted_claim_hash = self.get_repost(claim_hash)
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short_url = self.get_short_claim_id_url(name, claim_hash, root_tx_num, root_position)
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canonical_url = short_url
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claims_in_channel = self.get_claims_in_channel_count(claim_hash)
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if channel_hash:
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channel_vals = self.get_claim_txo(channel_hash)
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if channel_vals:
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channel_short_url = self.get_short_claim_id_url(
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channel_vals.name, channel_hash, channel_vals.root_tx_num, channel_vals.root_position
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)
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canonical_url = f'{channel_short_url}/{short_url}'
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return ResolveResult(
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name, claim_hash, tx_num, position, tx_hash, height, claim_amount, short_url=short_url,
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is_controlling=controlling_claim.claim_hash == claim_hash, canonical_url=canonical_url,
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last_takeover_height=last_take_over_height, claims_in_channel=claims_in_channel,
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creation_height=created_height, activation_height=activation_height,
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expiration_height=expiration_height, effective_amount=effective_amount, support_amount=support_amount,
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channel_hash=channel_hash, reposted_claim_hash=reposted_claim_hash,
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reposted=self.get_reposted_count(claim_hash),
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signature_valid=None if not channel_hash else signature_valid
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)
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def _resolve(self, normalized_name: str, claim_id: Optional[str] = None,
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amount_order: Optional[int] = None) -> Optional[ResolveResult]:
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"""
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:param normalized_name: name
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:param claim_id: partial or complete claim id
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:param amount_order: '$<value>' suffix to a url, defaults to 1 (winning) if no claim id modifier is provided
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"""
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if (not amount_order and not claim_id) or amount_order == 1:
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# winning resolution
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controlling = self.get_controlling_claim(normalized_name)
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if not controlling:
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# print(f"none controlling for lbry://{normalized_name}")
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return
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# print(f"resolved controlling lbry://{normalized_name}#{controlling.claim_hash.hex()}")
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return self._fs_get_claim_by_hash(controlling.claim_hash)
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amount_order = max(int(amount_order or 1), 1)
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if claim_id:
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if len(claim_id) == 40: # a full claim id
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claim_txo = self.get_claim_txo(bytes.fromhex(claim_id))
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if not claim_txo or normalized_name != claim_txo.name:
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return
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return self._prepare_resolve_result(
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claim_txo.tx_num, claim_txo.position, bytes.fromhex(claim_id), claim_txo.name,
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claim_txo.root_tx_num, claim_txo.root_position,
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self.get_activation(claim_txo.tx_num, claim_txo.position), claim_txo.channel_signature_is_valid
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)
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# resolve by partial/complete claim id
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prefix = Prefixes.claim_short_id.pack_partial_key(normalized_name, claim_id[:10])
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for k, v in self.db.iterator(prefix=prefix):
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key = Prefixes.claim_short_id.unpack_key(k)
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claim_txo = Prefixes.claim_short_id.unpack_value(v)
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claim_hash = self.get_claim_from_txo(claim_txo.tx_num, claim_txo.position).claim_hash
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signature_is_valid = self.get_claim_txo(claim_hash).channel_signature_is_valid
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return self._prepare_resolve_result(
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claim_txo.tx_num, claim_txo.position, claim_hash, key.name, key.root_tx_num,
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key.root_position, self.get_activation(claim_txo.tx_num, claim_txo.position),
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signature_is_valid
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)
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return
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# resolve by amount ordering, 1 indexed
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prefix = Prefixes.effective_amount.pack_partial_key(normalized_name)
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for idx, (k, v) in enumerate(self.db.iterator(prefix=prefix)):
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if amount_order > idx + 1:
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continue
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key = Prefixes.effective_amount.unpack_key(k)
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claim_val = Prefixes.effective_amount.unpack_value(v)
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claim_txo = self.get_claim_txo(claim_val.claim_hash)
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activation = self.get_activation(key.tx_num, key.position)
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return self._prepare_resolve_result(
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key.tx_num, key.position, claim_val.claim_hash, key.name, claim_txo.root_tx_num,
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claim_txo.root_position, activation, claim_txo.channel_signature_is_valid
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)
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return
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def _resolve_claim_in_channel(self, channel_hash: bytes, normalized_name: str):
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candidates = []
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for k, v in self.db.iterator(prefix=Prefixes.channel_to_claim.pack_partial_key(channel_hash, normalized_name)):
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key = Prefixes.channel_to_claim.unpack_key(k)
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stream = Prefixes.channel_to_claim.unpack_value(v)
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effective_amount = self.get_effective_amount(stream.claim_hash)
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if not candidates or candidates[-1][-1] == effective_amount:
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candidates.append((stream.claim_hash, key.tx_num, key.position, effective_amount))
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else:
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break
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if not candidates:
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return
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return list(sorted(candidates, key=lambda item: item[1]))[0]
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def _fs_resolve(self, url) -> typing.Tuple[OptionalResolveResultOrError, OptionalResolveResultOrError]:
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try:
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parsed = URL.parse(url)
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except ValueError as e:
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return e, None
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stream = channel = resolved_channel = resolved_stream = None
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if parsed.has_stream_in_channel:
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channel = parsed.channel
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stream = parsed.stream
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elif parsed.has_channel:
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channel = parsed.channel
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elif parsed.has_stream:
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stream = parsed.stream
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if channel:
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resolved_channel = self._resolve(channel.normalized, channel.claim_id, channel.amount_order)
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if not resolved_channel:
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return None, LookupError(f'Could not find channel in "{url}".')
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if stream:
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if resolved_channel:
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stream_claim = self._resolve_claim_in_channel(resolved_channel.claim_hash, stream.normalized)
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if stream_claim:
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stream_claim_id, stream_tx_num, stream_tx_pos, effective_amount = stream_claim
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resolved_stream = self._fs_get_claim_by_hash(stream_claim_id)
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else:
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resolved_stream = self._resolve(stream.normalized, stream.claim_id, stream.amount_order)
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if not channel and not resolved_channel and resolved_stream and resolved_stream.channel_hash:
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resolved_channel = self._fs_get_claim_by_hash(resolved_stream.channel_hash)
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if not resolved_stream:
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return LookupError(f'Could not find claim at "{url}".'), None
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return resolved_stream, resolved_channel
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async def fs_resolve(self, url) -> typing.Tuple[OptionalResolveResultOrError, OptionalResolveResultOrError]:
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return await asyncio.get_event_loop().run_in_executor(None, self._fs_resolve, url)
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def _fs_get_claim_by_hash(self, claim_hash):
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claim = self.db.get(Prefixes.claim_to_txo.pack_key(claim_hash))
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if claim:
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v = Prefixes.claim_to_txo.unpack_value(claim)
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activation_height = self.get_activation(v.tx_num, v.position)
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return self._prepare_resolve_result(
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v.tx_num, v.position, claim_hash, v.name,
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v.root_tx_num, v.root_position, activation_height, v.channel_signature_is_valid
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)
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async def fs_getclaimbyid(self, claim_id):
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return await asyncio.get_event_loop().run_in_executor(
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None, self._fs_get_claim_by_hash, bytes.fromhex(claim_id)
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)
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def get_claim_txo_amount(self, claim_hash: bytes) -> Optional[int]:
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claim = self.get_claim_txo(claim_hash)
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if claim:
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return claim.amount
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def get_block_hash(self, height: int) -> Optional[bytes]:
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v = self.db.get(Prefixes.block_hash.pack_key(height))
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if v:
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return Prefixes.block_hash.unpack_value(v).block_hash
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def get_support_txo_amount(self, claim_hash: bytes, tx_num: int, position: int) -> Optional[int]:
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v = self.db.get(Prefixes.claim_to_support.pack_key(claim_hash, tx_num, position))
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if v:
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return Prefixes.claim_to_support.unpack_value(v).amount
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def get_claim_txo(self, claim_hash: bytes) -> Optional[ClaimToTXOValue]:
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assert claim_hash
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v = self.db.get(Prefixes.claim_to_txo.pack_key(claim_hash))
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if v:
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return Prefixes.claim_to_txo.unpack_value(v)
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def _get_active_amount(self, claim_hash: bytes, txo_type: int, height: int) -> int:
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return sum(
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Prefixes.active_amount.unpack_value(v).amount
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for v in self.db.iterator(start=Prefixes.active_amount.pack_partial_key(
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claim_hash, txo_type, 0), stop=Prefixes.active_amount.pack_partial_key(
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claim_hash, txo_type, height), include_key=False)
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)
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def get_effective_amount(self, claim_hash: bytes, support_only=False) -> int:
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support_amount = self._get_active_amount(claim_hash, ACTIVATED_SUPPORT_TXO_TYPE, self.db_height + 1)
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if support_only:
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return support_only
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return support_amount + self._get_active_amount(claim_hash, ACTIVATED_CLAIM_TXO_TYPE, self.db_height + 1)
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def get_url_effective_amount(self, name: str, claim_hash: bytes):
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for _k, _v in self.db.iterator(prefix=Prefixes.effective_amount.pack_partial_key(name)):
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v = Prefixes.effective_amount.unpack_value(_v)
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if v.claim_hash == claim_hash:
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return Prefixes.effective_amount.unpack_key(_k)
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def get_claims_for_name(self, name):
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claims = []
|
|
prefix = Prefixes.claim_short_id.pack_partial_key(name) + int(1).to_bytes(1, byteorder='big')
|
|
for _k, _v in self.db.iterator(prefix=prefix):
|
|
v = Prefixes.claim_short_id.unpack_value(_v)
|
|
claim_hash = self.get_claim_from_txo(v.tx_num, v.position).claim_hash
|
|
if claim_hash not in claims:
|
|
claims.append(claim_hash)
|
|
return claims
|
|
|
|
def get_claims_in_channel_count(self, channel_hash) -> int:
|
|
count = 0
|
|
for _ in self.db.iterator(prefix=Prefixes.channel_to_claim.pack_partial_key(channel_hash), include_key=False):
|
|
count += 1
|
|
return count
|
|
|
|
def get_channel_for_claim(self, claim_hash, tx_num, position) -> Optional[bytes]:
|
|
return self.db.get(Prefixes.claim_to_channel.pack_key(claim_hash, tx_num, position))
|
|
|
|
def get_expired_by_height(self, height: int) -> Dict[bytes, Tuple[int, int, str, TxInput]]:
|
|
expired = {}
|
|
for _k, _v in self.db.iterator(prefix=Prefixes.claim_expiration.pack_partial_key(height)):
|
|
k, v = Prefixes.claim_expiration.unpack_item(_k, _v)
|
|
tx_hash = self.total_transactions[k.tx_num]
|
|
tx = self.coin.transaction(self.db.get(DB_PREFIXES.tx.value + tx_hash))
|
|
# treat it like a claim spend so it will delete/abandon properly
|
|
# the _spend_claim function this result is fed to expects a txi, so make a mock one
|
|
# print(f"\texpired lbry://{v.name} {v.claim_hash.hex()}")
|
|
expired[v.claim_hash] = (
|
|
k.tx_num, k.position, v.name,
|
|
TxInput(prev_hash=tx_hash, prev_idx=k.position, script=tx.outputs[k.position].pk_script, sequence=0)
|
|
)
|
|
return expired
|
|
|
|
def get_controlling_claim(self, name: str) -> Optional[ClaimTakeoverValue]:
|
|
controlling = self.db.get(Prefixes.claim_takeover.pack_key(name))
|
|
if not controlling:
|
|
return
|
|
return Prefixes.claim_takeover.unpack_value(controlling)
|
|
|
|
def get_claim_txos_for_name(self, name: str):
|
|
txos = {}
|
|
prefix = Prefixes.claim_short_id.pack_partial_key(name) + int(1).to_bytes(1, byteorder='big')
|
|
for k, v in self.db.iterator(prefix=prefix):
|
|
tx_num, nout = Prefixes.claim_short_id.unpack_value(v)
|
|
txos[self.get_claim_from_txo(tx_num, nout).claim_hash] = tx_num, nout
|
|
return txos
|
|
|
|
def get_claim_metadata(self, tx_hash, nout):
|
|
raw = self.db.get(
|
|
DB_PREFIXES.tx.value + tx_hash
|
|
)
|
|
try:
|
|
output = self.coin.transaction(raw).outputs[nout]
|
|
script = OutputScript(output.pk_script)
|
|
script.parse()
|
|
return Claim.from_bytes(script.values['claim'])
|
|
except:
|
|
self.logger.error(
|
|
"tx parsing for ES went boom %s %s", tx_hash[::-1].hex(),
|
|
raw.hex()
|
|
)
|
|
return
|
|
|
|
def _prepare_claim_for_sync(self, claim_hash: bytes):
|
|
claim = self._fs_get_claim_by_hash(claim_hash)
|
|
if not claim:
|
|
print("wat")
|
|
return
|
|
return self._prepare_claim_metadata(claim_hash, claim)
|
|
|
|
def _prepare_claim_metadata(self, claim_hash: bytes, claim: ResolveResult):
|
|
metadata = self.get_claim_metadata(claim.tx_hash, claim.position)
|
|
if not metadata:
|
|
return
|
|
if not metadata.is_stream or not metadata.stream.has_fee:
|
|
fee_amount = None
|
|
else:
|
|
fee_amount = int(max(metadata.stream.fee.amount or 0, 0) * 1000)
|
|
if fee_amount >= 9223372036854775807:
|
|
return
|
|
reposted_claim_hash = None if not metadata.is_repost else metadata.repost.reference.claim_hash[::-1]
|
|
reposted_claim = None
|
|
reposted_metadata = None
|
|
if reposted_claim_hash:
|
|
reposted_claim = self.get_claim_txo(reposted_claim_hash)
|
|
if not reposted_claim:
|
|
return
|
|
reposted_metadata = self.get_claim_metadata(
|
|
self.total_transactions[reposted_claim.tx_num], reposted_claim.position
|
|
)
|
|
if not reposted_metadata:
|
|
return
|
|
reposted_tags = []
|
|
reposted_languages = []
|
|
reposted_has_source = None
|
|
reposted_claim_type = None
|
|
if reposted_claim:
|
|
reposted_tx_hash = self.total_transactions[reposted_claim.tx_num]
|
|
raw_reposted_claim_tx = self.db.get(
|
|
DB_PREFIXES.tx.value + reposted_tx_hash
|
|
)
|
|
try:
|
|
reposted_claim_txo = self.coin.transaction(
|
|
raw_reposted_claim_tx
|
|
).outputs[reposted_claim.position]
|
|
reposted_script = OutputScript(reposted_claim_txo.pk_script)
|
|
reposted_script.parse()
|
|
except:
|
|
self.logger.error(
|
|
"repost tx parsing for ES went boom %s %s", reposted_tx_hash[::-1].hex(),
|
|
raw_reposted_claim_tx.hex()
|
|
)
|
|
return
|
|
try:
|
|
reposted_metadata = Claim.from_bytes(reposted_script.values['claim'])
|
|
except:
|
|
self.logger.error(
|
|
"reposted claim parsing for ES went boom %s %s", reposted_tx_hash[::-1].hex(),
|
|
raw_reposted_claim_tx.hex()
|
|
)
|
|
return
|
|
if reposted_metadata:
|
|
reposted_tags = [] if not reposted_metadata.is_stream else [tag for tag in reposted_metadata.stream.tags]
|
|
reposted_languages = [] if not reposted_metadata.is_stream else (
|
|
[lang.language or 'none' for lang in reposted_metadata.stream.languages] or ['none']
|
|
)
|
|
reposted_has_source = False if not reposted_metadata.is_stream else reposted_metadata.stream.has_source
|
|
reposted_claim_type = CLAIM_TYPES[reposted_metadata.claim_type]
|
|
claim_tags = [] if not metadata.is_stream else [tag for tag in metadata.stream.tags]
|
|
claim_languages = [] if not metadata.is_stream else (
|
|
[lang.language or 'none' for lang in metadata.stream.languages] or ['none']
|
|
)
|
|
tags = list(set(claim_tags).union(set(reposted_tags)))
|
|
languages = list(set(claim_languages).union(set(reposted_languages)))
|
|
value = {
|
|
'claim_hash': claim_hash[::-1],
|
|
# 'claim_id': claim_hash.hex(),
|
|
'claim_name': claim.name,
|
|
'normalized': claim.name,
|
|
'tx_id': claim.tx_hash[::-1].hex(),
|
|
'tx_num': claim.tx_num,
|
|
'tx_nout': claim.position,
|
|
'amount': claim.amount,
|
|
'timestamp': 0, # TODO: fix
|
|
'creation_timestamp': 0, # TODO: fix
|
|
'height': claim.height,
|
|
'creation_height': claim.creation_height,
|
|
'activation_height': claim.activation_height,
|
|
'expiration_height': claim.expiration_height,
|
|
'effective_amount': claim.effective_amount,
|
|
'support_amount': claim.support_amount,
|
|
'is_controlling': claim.is_controlling,
|
|
'last_take_over_height': claim.last_takeover_height,
|
|
'short_url': claim.short_url,
|
|
'canonical_url': claim.canonical_url,
|
|
'title': None if not metadata.is_stream else metadata.stream.title,
|
|
'author': None if not metadata.is_stream else metadata.stream.author,
|
|
'description': None if not metadata.is_stream else metadata.stream.description,
|
|
'claim_type': CLAIM_TYPES[metadata.claim_type],
|
|
'has_source': reposted_has_source if reposted_has_source is not None else (
|
|
False if not metadata.is_stream else metadata.stream.has_source),
|
|
'stream_type': None if not metadata.is_stream else STREAM_TYPES[
|
|
guess_stream_type(metadata.stream.source.media_type)],
|
|
'media_type': None if not metadata.is_stream else metadata.stream.source.media_type,
|
|
'fee_amount': fee_amount,
|
|
'fee_currency': None if not metadata.is_stream else metadata.stream.fee.currency,
|
|
|
|
'reposted': self.get_reposted_count(claim_hash),
|
|
'reposted_claim_hash': reposted_claim_hash,
|
|
'reposted_claim_type': reposted_claim_type,
|
|
'reposted_has_source': reposted_has_source,
|
|
|
|
'channel_hash': metadata.signing_channel_hash,
|
|
|
|
'public_key_bytes': None if not metadata.is_channel else metadata.channel.public_key_bytes,
|
|
'public_key_hash': None if not metadata.is_channel else self.ledger.address_to_hash160(
|
|
self.ledger.public_key_to_address(metadata.channel.public_key_bytes)
|
|
),
|
|
'signature': metadata.signature,
|
|
'signature_digest': None, # TODO: fix
|
|
'signature_valid': claim.signature_valid,
|
|
'tags': tags,
|
|
'languages': languages,
|
|
'censor_type': 0, # TODO: fix
|
|
'censoring_channel_hash': None, # TODO: fix
|
|
'claims_in_channel': None if not metadata.is_channel else self.get_claims_in_channel_count(claim_hash)
|
|
# 'trending_group': 0,
|
|
# 'trending_mixed': 0,
|
|
# 'trending_local': 0,
|
|
# 'trending_global': 0,
|
|
}
|
|
if metadata.is_stream and (metadata.stream.video.duration or metadata.stream.audio.duration):
|
|
value['duration'] = metadata.stream.video.duration or metadata.stream.audio.duration
|
|
if metadata.is_stream and metadata.stream.release_time:
|
|
value['release_time'] = metadata.stream.release_time
|
|
return value
|
|
|
|
def all_claims_producer(self, batch_size=500_000):
|
|
batch = []
|
|
for claim_hash, v in self.db.iterator(prefix=Prefixes.claim_to_txo.prefix):
|
|
# TODO: fix the couple of claim txos that dont have controlling names
|
|
if not self.db.get(Prefixes.claim_takeover.pack_key(Prefixes.claim_to_txo.unpack_value(v).name)):
|
|
continue
|
|
claim = self._fs_get_claim_by_hash(claim_hash[1:])
|
|
if claim:
|
|
batch.append(claim)
|
|
if len(batch) == batch_size:
|
|
batch.sort(key=lambda x: x.tx_hash)
|
|
for claim in batch:
|
|
meta = self._prepare_claim_metadata(claim.claim_hash, claim)
|
|
if meta:
|
|
yield meta
|
|
batch.clear()
|
|
batch.sort(key=lambda x: x.tx_hash)
|
|
for claim in batch:
|
|
meta = self._prepare_claim_metadata(claim.claim_hash, claim)
|
|
if meta:
|
|
yield meta
|
|
batch.clear()
|
|
|
|
def claims_producer(self, claim_hashes: Set[bytes]):
|
|
batch = []
|
|
for claim_hash in claim_hashes:
|
|
claim = self._fs_get_claim_by_hash(claim_hash)
|
|
if claim:
|
|
batch.append(claim)
|
|
batch.sort(key=lambda x: x.tx_hash)
|
|
for claim in batch:
|
|
meta = self._prepare_claim_metadata(claim.claim_hash, claim)
|
|
if meta:
|
|
yield meta
|
|
|
|
def get_activated_at_height(self, height: int) -> DefaultDict[PendingActivationValue, List[PendingActivationKey]]:
|
|
activated = defaultdict(list)
|
|
for _k, _v in self.db.iterator(prefix=Prefixes.pending_activation.pack_partial_key(height)):
|
|
k = Prefixes.pending_activation.unpack_key(_k)
|
|
v = Prefixes.pending_activation.unpack_value(_v)
|
|
activated[v].append(k)
|
|
return activated
|
|
|
|
def get_future_activated(self, height: int) -> typing.Generator[
|
|
Tuple[PendingActivationValue, PendingActivationKey], None, None]:
|
|
yielded = set()
|
|
start_prefix = Prefixes.pending_activation.pack_partial_key(height + 1)
|
|
stop_prefix = Prefixes.pending_activation.pack_partial_key(height + 1 + self.coin.maxTakeoverDelay)
|
|
for _k, _v in self.db.iterator(start=start_prefix, stop=stop_prefix, reverse=True):
|
|
v = Prefixes.pending_activation.unpack_value(_v)
|
|
if v not in yielded:
|
|
yielded.add(v)
|
|
k = Prefixes.pending_activation.unpack_key(_k)
|
|
yield v, k
|
|
|
|
async def _read_tx_counts(self):
|
|
if self.tx_counts is not None:
|
|
return
|
|
# tx_counts[N] has the cumulative number of txs at the end of
|
|
# height N. So tx_counts[0] is 1 - the genesis coinbase
|
|
|
|
def get_counts():
|
|
return tuple(
|
|
Prefixes.tx_count.unpack_value(packed_tx_count).tx_count
|
|
for packed_tx_count in self.db.iterator(prefix=Prefixes.tx_count.prefix, include_key=False)
|
|
)
|
|
|
|
tx_counts = await asyncio.get_event_loop().run_in_executor(None, get_counts)
|
|
assert len(tx_counts) == self.db_height + 1, f"{len(tx_counts)} vs {self.db_height + 1}"
|
|
self.tx_counts = array.array('I', tx_counts)
|
|
|
|
if self.tx_counts:
|
|
assert self.db_tx_count == self.tx_counts[-1], \
|
|
f"{self.db_tx_count} vs {self.tx_counts[-1]} ({len(self.tx_counts)} counts)"
|
|
else:
|
|
assert self.db_tx_count == 0
|
|
|
|
async def _read_txids(self):
|
|
def get_txids():
|
|
return list(self.db.iterator(prefix=Prefixes.tx_hash.prefix, include_key=False))
|
|
|
|
start = time.perf_counter()
|
|
self.logger.info("loading txids")
|
|
txids = await asyncio.get_event_loop().run_in_executor(None, get_txids)
|
|
assert len(txids) == len(self.tx_counts) == 0 or len(txids) == self.tx_counts[-1]
|
|
self.total_transactions = txids
|
|
self.transaction_num_mapping = {
|
|
txid: i for i, txid in enumerate(txids)
|
|
}
|
|
ts = time.perf_counter() - start
|
|
self.logger.info("loaded %i txids in %ss", len(self.total_transactions), round(ts, 4))
|
|
|
|
async def _read_headers(self):
|
|
if self.headers is not None:
|
|
return
|
|
|
|
def get_headers():
|
|
return [
|
|
header for header in self.db.iterator(prefix=Prefixes.header.prefix, include_key=False)
|
|
]
|
|
|
|
headers = await asyncio.get_event_loop().run_in_executor(None, get_headers)
|
|
assert len(headers) - 1 == self.db_height, f"{len(headers)} vs {self.db_height}"
|
|
self.headers = headers
|
|
|
|
async def open_dbs(self):
|
|
if self.db:
|
|
return
|
|
assert self.db is None
|
|
self.db = self.db_class(f'lbry-{self.env.db_engine}', True)
|
|
if self.db.is_new:
|
|
self.logger.info('created new db: %s', f'lbry-{self.env.db_engine}')
|
|
else:
|
|
self.logger.info(f'opened db: %s', f'lbry-{self.env.db_engine}')
|
|
|
|
# read db state
|
|
self.read_db_state()
|
|
|
|
# These are our state as we move ahead of DB state
|
|
self.fs_height = self.db_height
|
|
self.fs_tx_count = self.db_tx_count
|
|
self.last_flush_tx_count = self.fs_tx_count
|
|
|
|
# Log some stats
|
|
self.logger.info(f'DB version: {self.db_version:d}')
|
|
self.logger.info(f'coin: {self.coin.NAME}')
|
|
self.logger.info(f'network: {self.coin.NET}')
|
|
self.logger.info(f'height: {self.db_height:,d}')
|
|
self.logger.info(f'tip: {hash_to_hex_str(self.db_tip)}')
|
|
self.logger.info(f'tx count: {self.db_tx_count:,d}')
|
|
if self.db.for_sync:
|
|
self.logger.info(f'flushing DB cache at {self.env.cache_MB:,d} MB')
|
|
if self.first_sync:
|
|
self.logger.info(f'sync time so far: {util.formatted_time(self.wall_time)}')
|
|
if self.hist_db_version not in self.DB_VERSIONS:
|
|
msg = f'this software only handles DB versions {self.DB_VERSIONS}'
|
|
self.logger.error(msg)
|
|
raise RuntimeError(msg)
|
|
self.logger.info(f'flush count: {self.hist_flush_count:,d}')
|
|
|
|
self.utxo_flush_count = self.hist_flush_count
|
|
|
|
# Read TX counts (requires meta directory)
|
|
await self._read_tx_counts()
|
|
if self.total_transactions is None:
|
|
await self._read_txids()
|
|
await self._read_headers()
|
|
|
|
# start search index
|
|
await self.search_index.start()
|
|
|
|
def close(self):
|
|
self.db.close()
|
|
|
|
# Header merkle cache
|
|
|
|
async def populate_header_merkle_cache(self):
|
|
self.logger.info('populating header merkle cache...')
|
|
length = max(1, self.db_height - self.env.reorg_limit)
|
|
start = time.time()
|
|
await self.header_mc.initialize(length)
|
|
elapsed = time.time() - start
|
|
self.logger.info(f'header merkle cache populated in {elapsed:.1f}s')
|
|
|
|
async def header_branch_and_root(self, length, height):
|
|
return await self.header_mc.branch_and_root(length, height)
|
|
|
|
# Flushing
|
|
def assert_flushed(self, flush_data):
|
|
"""Asserts state is fully flushed."""
|
|
assert flush_data.tx_count == self.fs_tx_count == self.db_tx_count
|
|
assert flush_data.height == self.fs_height == self.db_height
|
|
assert flush_data.tip == self.db_tip
|
|
assert not len(flush_data.put_and_delete_ops)
|
|
|
|
def flush_dbs(self, flush_data: FlushData):
|
|
if flush_data.height == self.db_height:
|
|
self.assert_flushed(flush_data)
|
|
return
|
|
|
|
min_height = self.min_undo_height(self.db_height)
|
|
delete_undo_keys = []
|
|
if min_height > 0: # delete undos for blocks deep enough they can't be reorged
|
|
delete_undo_keys.extend(
|
|
self.db.iterator(
|
|
start=Prefixes.undo.pack_key(0), stop=Prefixes.undo.pack_key(min_height), include_value=False
|
|
)
|
|
)
|
|
delete_undo_keys.extend(
|
|
self.db.iterator(
|
|
start=Prefixes.touched_or_deleted.pack_key(0),
|
|
stop=Prefixes.touched_or_deleted.pack_key(min_height), include_value=False
|
|
)
|
|
)
|
|
|
|
with self.db.write_batch() as batch:
|
|
batch_put = batch.put
|
|
batch_delete = batch.delete
|
|
|
|
for staged_change in flush_data.put_and_delete_ops:
|
|
if staged_change.is_put:
|
|
batch_put(staged_change.key, staged_change.value)
|
|
else:
|
|
batch_delete(staged_change.key)
|
|
for delete_key in delete_undo_keys:
|
|
batch_delete(delete_key)
|
|
|
|
self.fs_height = flush_data.height
|
|
self.fs_tx_count = flush_data.tx_count
|
|
self.hist_flush_count += 1
|
|
self.hist_unflushed_count = 0
|
|
self.utxo_flush_count = self.hist_flush_count
|
|
self.db_height = flush_data.height
|
|
self.db_tx_count = flush_data.tx_count
|
|
self.db_tip = flush_data.tip
|
|
self.last_flush_tx_count = self.fs_tx_count
|
|
now = time.time()
|
|
self.wall_time += now - self.last_flush
|
|
self.last_flush = now
|
|
self.write_db_state(batch)
|
|
|
|
def flush_backup(self, flush_data):
|
|
assert flush_data.height < self.db_height
|
|
assert not self.hist_unflushed
|
|
|
|
start_time = time.time()
|
|
tx_delta = flush_data.tx_count - self.last_flush_tx_count
|
|
###
|
|
self.fs_tx_count = flush_data.tx_count
|
|
# Truncate header_mc: header count is 1 more than the height.
|
|
self.header_mc.truncate(flush_data.height + 1)
|
|
###
|
|
# Not certain this is needed, but it doesn't hurt
|
|
self.hist_flush_count += 1
|
|
nremoves = 0
|
|
|
|
with self.db.write_batch() as batch:
|
|
batch_put = batch.put
|
|
batch_delete = batch.delete
|
|
for op in flush_data.put_and_delete_ops:
|
|
# print("REWIND", op)
|
|
if op.is_put:
|
|
batch_put(op.key, op.value)
|
|
else:
|
|
batch_delete(op.key)
|
|
while self.fs_height > flush_data.height:
|
|
self.fs_height -= 1
|
|
|
|
start_time = time.time()
|
|
if self.db.for_sync:
|
|
block_count = flush_data.height - self.db_height
|
|
tx_count = flush_data.tx_count - self.db_tx_count
|
|
elapsed = time.time() - start_time
|
|
self.logger.info(f'flushed {block_count:,d} blocks with '
|
|
f'{tx_count:,d} txs in '
|
|
f'{elapsed:.1f}s, committing...')
|
|
|
|
self.utxo_flush_count = self.hist_flush_count
|
|
self.db_height = flush_data.height
|
|
self.db_tx_count = flush_data.tx_count
|
|
self.db_tip = flush_data.tip
|
|
|
|
# Flush state last as it reads the wall time.
|
|
now = time.time()
|
|
self.wall_time += now - self.last_flush
|
|
self.last_flush = now
|
|
self.last_flush_tx_count = self.fs_tx_count
|
|
self.write_db_state(batch)
|
|
|
|
self.logger.info(f'backing up removed {nremoves:,d} history entries')
|
|
elapsed = self.last_flush - start_time
|
|
self.logger.info(f'backup flush #{self.hist_flush_count:,d} took {elapsed:.1f}s. '
|
|
f'Height {flush_data.height:,d} txs: {flush_data.tx_count:,d} ({tx_delta:+,d})')
|
|
|
|
def raw_header(self, height):
|
|
"""Return the binary header at the given height."""
|
|
header, n = self.read_headers(height, 1)
|
|
if n != 1:
|
|
raise IndexError(f'height {height:,d} out of range')
|
|
return header
|
|
|
|
def encode_headers(self, start_height, count, headers):
|
|
key = (start_height, count)
|
|
if not self.encoded_headers.get(key):
|
|
compressobj = zlib.compressobj(wbits=-15, level=1, memLevel=9)
|
|
headers = base64.b64encode(compressobj.compress(headers) + compressobj.flush()).decode()
|
|
if start_height % 1000 != 0:
|
|
return headers
|
|
self.encoded_headers[key] = headers
|
|
return self.encoded_headers.get(key)
|
|
|
|
def read_headers(self, start_height, count) -> typing.Tuple[bytes, int]:
|
|
"""Requires start_height >= 0, count >= 0. Reads as many headers as
|
|
are available starting at start_height up to count. This
|
|
would be zero if start_height is beyond self.db_height, for
|
|
example.
|
|
|
|
Returns a (binary, n) pair where binary is the concatenated
|
|
binary headers, and n is the count of headers returned.
|
|
"""
|
|
|
|
if start_height < 0 or count < 0:
|
|
raise DBError(f'{count:,d} headers starting at {start_height:,d} not on disk')
|
|
|
|
disk_count = max(0, min(count, self.db_height + 1 - start_height))
|
|
if disk_count:
|
|
return b''.join(self.headers[start_height:start_height + disk_count]), disk_count
|
|
return b'', 0
|
|
|
|
def fs_tx_hash(self, tx_num):
|
|
"""Return a par (tx_hash, tx_height) for the given tx number.
|
|
|
|
If the tx_height is not on disk, returns (None, tx_height)."""
|
|
tx_height = bisect_right(self.tx_counts, tx_num)
|
|
if tx_height > self.db_height:
|
|
return None, tx_height
|
|
try:
|
|
return self.total_transactions[tx_num], tx_height
|
|
except IndexError:
|
|
self.logger.exception(
|
|
"Failed to access a cached transaction, known bug #3142 "
|
|
"should be fixed in #3205"
|
|
)
|
|
return None, tx_height
|
|
|
|
def _fs_transactions(self, txids: Iterable[str]):
|
|
tx_counts = self.tx_counts
|
|
tx_db_get = self.db.get
|
|
tx_cache = self._tx_and_merkle_cache
|
|
tx_infos = {}
|
|
|
|
for tx_hash in txids:
|
|
cached_tx = tx_cache.get(tx_hash)
|
|
if cached_tx:
|
|
tx, merkle = cached_tx
|
|
else:
|
|
tx_hash_bytes = bytes.fromhex(tx_hash)[::-1]
|
|
tx_num = self.transaction_num_mapping.get(tx_hash_bytes)
|
|
tx = None
|
|
tx_height = -1
|
|
if tx_num is not None:
|
|
tx_height = bisect_right(tx_counts, tx_num)
|
|
tx = tx_db_get(Prefixes.tx.pack_key(tx_hash_bytes))
|
|
if tx_height == -1:
|
|
merkle = {
|
|
'block_height': -1
|
|
}
|
|
else:
|
|
tx_pos = tx_num - tx_counts[tx_height - 1]
|
|
branch, root = self.merkle.branch_and_root(
|
|
self.total_transactions[tx_counts[tx_height - 1]:tx_counts[tx_height]], tx_pos
|
|
)
|
|
merkle = {
|
|
'block_height': tx_height,
|
|
'merkle': [
|
|
hash_to_hex_str(hash)
|
|
for hash in branch
|
|
],
|
|
'pos': tx_pos
|
|
}
|
|
if tx_height + 10 < self.db_height:
|
|
tx_cache[tx_hash] = tx, merkle
|
|
tx_infos[tx_hash] = (None if not tx else tx.hex(), merkle)
|
|
return tx_infos
|
|
|
|
async def fs_transactions(self, txids):
|
|
return await asyncio.get_event_loop().run_in_executor(None, self._fs_transactions, txids)
|
|
|
|
async def fs_block_hashes(self, height, count):
|
|
if height + count > len(self.headers):
|
|
raise DBError(f'only got {len(self.headers) - height:,d} headers starting at {height:,d}, not {count:,d}')
|
|
return [self.coin.header_hash(header) for header in self.headers[height:height + count]]
|
|
|
|
def read_history(self, hashX: bytes, limit: int = 1000) -> List[int]:
|
|
txs = array.array('I')
|
|
for hist in self.db.iterator(prefix=Prefixes.hashX_history.pack_partial_key(hashX), include_key=False):
|
|
a = array.array('I')
|
|
a.frombytes(hist)
|
|
txs.extend(a)
|
|
if len(txs) >= limit:
|
|
break
|
|
return txs.tolist()
|
|
|
|
async def limited_history(self, hashX, *, limit=1000):
|
|
"""Return an unpruned, sorted list of (tx_hash, height) tuples of
|
|
confirmed transactions that touched the address, earliest in
|
|
the blockchain first. Includes both spending and receiving
|
|
transactions. By default returns at most 1000 entries. Set
|
|
limit to None to get them all.
|
|
"""
|
|
while True:
|
|
history = await asyncio.get_event_loop().run_in_executor(None, self.read_history, hashX, limit)
|
|
if history is not None:
|
|
return [(self.total_transactions[tx_num], bisect_right(self.tx_counts, tx_num)) for tx_num in history]
|
|
self.logger.warning(f'limited_history: tx hash '
|
|
f'not found (reorg?), retrying...')
|
|
await sleep(0.25)
|
|
|
|
# -- Undo information
|
|
|
|
def min_undo_height(self, max_height):
|
|
"""Returns a height from which we should store undo info."""
|
|
return max_height - self.env.reorg_limit + 1
|
|
|
|
def undo_key(self, height: int) -> bytes:
|
|
"""DB key for undo information at the given height."""
|
|
return Prefixes.undo.pack_key(height)
|
|
|
|
def read_undo_info(self, height: int):
|
|
return self.db.get(Prefixes.undo.pack_key(height)), self.db.get(Prefixes.touched_or_deleted.pack_key(height))
|
|
|
|
# -- UTXO database
|
|
|
|
def write_db_state(self, batch):
|
|
"""Write (UTXO) state to the batch."""
|
|
batch.put(
|
|
DB_PREFIXES.db_state.value,
|
|
DBState(
|
|
self.genesis_bytes, self.db_height, self.db_tx_count, self.db_tip,
|
|
self.utxo_flush_count, int(self.wall_time), self.first_sync, self.db_version,
|
|
self.hist_flush_count, self.hist_comp_flush_count, self.hist_comp_cursor
|
|
).pack()
|
|
)
|
|
|
|
def read_db_state(self):
|
|
state = self.db.get(DB_PREFIXES.db_state.value)
|
|
if not state:
|
|
self.db_height = -1
|
|
self.db_tx_count = 0
|
|
self.db_tip = b'\0' * 32
|
|
self.db_version = max(self.DB_VERSIONS)
|
|
self.utxo_flush_count = 0
|
|
self.wall_time = 0
|
|
self.first_sync = True
|
|
self.hist_flush_count = 0
|
|
self.hist_comp_flush_count = -1
|
|
self.hist_comp_cursor = -1
|
|
self.hist_db_version = max(self.DB_VERSIONS)
|
|
else:
|
|
state = DBState.unpack(state)
|
|
self.db_version = state.db_version
|
|
if self.db_version not in self.DB_VERSIONS:
|
|
raise DBError(f'your DB version is {self.db_version} but this '
|
|
f'software only handles versions {self.DB_VERSIONS}')
|
|
# backwards compat
|
|
genesis_hash = state.genesis
|
|
if genesis_hash.hex() != self.coin.GENESIS_HASH:
|
|
raise DBError(f'DB genesis hash {genesis_hash} does not '
|
|
f'match coin {self.coin.GENESIS_HASH}')
|
|
self.db_height = state.height
|
|
self.db_tx_count = state.tx_count
|
|
self.db_tip = state.tip
|
|
self.utxo_flush_count = state.utxo_flush_count
|
|
self.wall_time = state.wall_time
|
|
self.first_sync = state.first_sync
|
|
self.hist_flush_count = state.hist_flush_count
|
|
self.hist_comp_flush_count = state.comp_flush_count
|
|
self.hist_comp_cursor = state.comp_cursor
|
|
self.hist_db_version = state.db_version
|
|
|
|
async def all_utxos(self, hashX):
|
|
"""Return all UTXOs for an address sorted in no particular order."""
|
|
def read_utxos():
|
|
utxos = []
|
|
utxos_append = utxos.append
|
|
fs_tx_hash = self.fs_tx_hash
|
|
for db_key, db_value in self.db.iterator(prefix=Prefixes.utxo.pack_partial_key(hashX)):
|
|
k = Prefixes.utxo.unpack_key(db_key)
|
|
v = Prefixes.utxo.unpack_value(db_value)
|
|
tx_hash, height = fs_tx_hash(k.tx_num)
|
|
utxos_append(UTXO(k.tx_num, k.nout, tx_hash, height, v.amount))
|
|
return utxos
|
|
|
|
while True:
|
|
utxos = await asyncio.get_event_loop().run_in_executor(None, read_utxos)
|
|
if all(utxo.tx_hash is not None for utxo in utxos):
|
|
return utxos
|
|
self.logger.warning(f'all_utxos: tx hash not '
|
|
f'found (reorg?), retrying...')
|
|
await sleep(0.25)
|
|
|
|
async def lookup_utxos(self, prevouts):
|
|
def lookup_utxos():
|
|
utxos = []
|
|
utxo_append = utxos.append
|
|
for (tx_hash, nout) in prevouts:
|
|
if tx_hash not in self.transaction_num_mapping:
|
|
continue
|
|
tx_num = self.transaction_num_mapping[tx_hash]
|
|
hashX = self.db.get(Prefixes.hashX_utxo.pack_key(tx_hash[:4], tx_num, nout))
|
|
if not hashX:
|
|
continue
|
|
utxo_value = self.db.get(Prefixes.utxo.pack_key(hashX, tx_num, nout))
|
|
if utxo_value:
|
|
utxo_append((hashX, Prefixes.utxo.unpack_value(utxo_value).amount))
|
|
return utxos
|
|
return await asyncio.get_event_loop().run_in_executor(None, lookup_utxos)
|