/
leveldb.py
1149 lines (1014 loc) · 52.6 KB
/
leveldb.py
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# Copyright (c) 2016, Neil Booth
# Copyright (c) 2017, the ElectrumX authors
#
# All rights reserved.
#
# See the file "LICENCE" for information about the copyright
# and warranty status of this software.
"""Interface to the blockchain database."""
import os
import asyncio
import array
import time
import typing
import struct
import zlib
import base64
from typing import Optional, Iterable, Tuple, DefaultDict, Set, Dict, List, TYPE_CHECKING
from functools import partial
from asyncio import sleep
from bisect import bisect_right
from collections import defaultdict
from lbry.error import ResolveCensoredError
from lbry.schema.result import Censor
from lbry.utils import LRUCacheWithMetrics
from lbry.schema.url import URL, normalize_name
from lbry.wallet.server import util
from lbry.wallet.server.hash import hash_to_hex_str
from lbry.wallet.server.tx import TxInput
from lbry.wallet.server.merkle import Merkle, MerkleCache
from lbry.wallet.server.db.common import ResolveResult, STREAM_TYPES, CLAIM_TYPES
from lbry.wallet.server.db.prefixes import PendingActivationValue, ClaimTakeoverValue, ClaimToTXOValue, HubDB
from lbry.wallet.server.db.prefixes import ACTIVATED_CLAIM_TXO_TYPE, ACTIVATED_SUPPORT_TXO_TYPE
from lbry.wallet.server.db.prefixes import PendingActivationKey, TXOToClaimValue, DBStatePrefixRow
from lbry.wallet.transaction import OutputScript
from lbry.schema.claim import Claim, guess_stream_type
from lbry.wallet.ledger import Ledger, RegTestLedger, TestNetLedger
from lbry.wallet.server.db.elasticsearch import SearchIndex
if TYPE_CHECKING:
from lbry.wallet.server.db.prefixes import EffectiveAmountKey
class UTXO(typing.NamedTuple):
tx_num: int
tx_pos: int
tx_hash: bytes
height: int
value: int
TXO_STRUCT = struct.Struct(b'>LH')
TXO_STRUCT_unpack = TXO_STRUCT.unpack
TXO_STRUCT_pack = TXO_STRUCT.pack
OptionalResolveResultOrError = Optional[typing.Union[ResolveResult, ResolveCensoredError, LookupError, ValueError]]
class ExpandedResolveResult(typing.NamedTuple):
stream: OptionalResolveResultOrError
channel: OptionalResolveResultOrError
repost: OptionalResolveResultOrError
reposted_channel: OptionalResolveResultOrError
class DBError(Exception):
"""Raised on general DB errors generally indicating corruption."""
class LevelDB:
DB_VERSIONS = HIST_DB_VERSIONS = [7]
def __init__(self, env):
self.logger = util.class_logger(__name__, self.__class__.__name__)
self.env = env
self.coin = env.coin
self.logger.info(f'switching current directory to {env.db_dir}')
self.prefix_db = None
self.hist_unflushed = defaultdict(partial(array.array, 'I'))
self.hist_unflushed_count = 0
self.hist_flush_count = 0
self.hist_comp_flush_count = -1
self.hist_comp_cursor = -1
self.es_sync_height = 0
# blocking/filtering dicts
blocking_channels = self.env.default('BLOCKING_CHANNEL_IDS', '').split(' ')
filtering_channels = self.env.default('FILTERING_CHANNEL_IDS', '').split(' ')
self.blocked_streams = {}
self.blocked_channels = {}
self.blocking_channel_hashes = {
bytes.fromhex(channel_id) for channel_id in blocking_channels if channel_id
}
self.filtered_streams = {}
self.filtered_channels = {}
self.filtering_channel_hashes = {
bytes.fromhex(channel_id) for channel_id in filtering_channels if channel_id
}
self.tx_counts = None
self.headers = None
self.encoded_headers = LRUCacheWithMetrics(1 << 21, metric_name='encoded_headers', namespace='wallet_server')
self.last_flush = time.time()
# Header merkle cache
self.merkle = Merkle()
self.header_mc = MerkleCache(self.merkle, self.fs_block_hashes)
self._tx_and_merkle_cache = LRUCacheWithMetrics(2 ** 16, metric_name='tx_and_merkle', namespace="wallet_server")
# these are only used if the cache_all_tx_hashes setting is on
self.total_transactions: List[bytes] = []
self.tx_num_mapping: Dict[bytes, int] = {}
# these are only used if the cache_all_claim_txos setting is on
self.claim_to_txo: Dict[bytes, ClaimToTXOValue] = {}
self.txo_to_claim: DefaultDict[int, Dict[int, bytes]] = defaultdict(dict)
# Search index
self.search_index = SearchIndex(
self.env.es_index_prefix, self.env.database_query_timeout,
elastic_host=env.elastic_host, elastic_port=env.elastic_port
)
self.genesis_bytes = bytes.fromhex(self.coin.GENESIS_HASH)
if env.coin.NET == 'mainnet':
self.ledger = Ledger
elif env.coin.NET == 'testnet':
self.ledger = TestNetLedger
else:
self.ledger = RegTestLedger
def get_claim_from_txo(self, tx_num: int, tx_idx: int) -> Optional[TXOToClaimValue]:
claim_hash_and_name = self.prefix_db.txo_to_claim.get(tx_num, tx_idx)
if not claim_hash_and_name:
return
return claim_hash_and_name
def get_repost(self, claim_hash) -> Optional[bytes]:
repost = self.prefix_db.repost.get(claim_hash)
if repost:
return repost.reposted_claim_hash
return
def get_reposted_count(self, claim_hash: bytes) -> int:
return sum(
1 for _ in self.prefix_db.reposted_claim.iterate(prefix=(claim_hash,), include_value=False)
)
def get_activation(self, tx_num, position, is_support=False) -> int:
activation = self.prefix_db.activated.get(
ACTIVATED_SUPPORT_TXO_TYPE if is_support else ACTIVATED_CLAIM_TXO_TYPE, tx_num, position
)
if activation:
return activation.height
return -1
def get_supported_claim_from_txo(self, tx_num: int, position: int) -> typing.Tuple[Optional[bytes], Optional[int]]:
supported_claim_hash = self.prefix_db.support_to_claim.get(tx_num, position)
if supported_claim_hash:
packed_support_amount = self.prefix_db.claim_to_support.get(
supported_claim_hash.claim_hash, tx_num, position
)
if packed_support_amount:
return supported_claim_hash.claim_hash, packed_support_amount.amount
return None, None
def get_support_amount(self, claim_hash: bytes):
support_amount_val = self.prefix_db.support_amount.get(claim_hash)
if support_amount_val is None:
return 0
return support_amount_val.amount
def get_supports(self, claim_hash: bytes):
return [
(k.tx_num, k.position, v.amount) for k, v in self.prefix_db.claim_to_support.iterate(prefix=(claim_hash,))
]
def get_short_claim_id_url(self, name: str, normalized_name: str, claim_hash: bytes,
root_tx_num: int, root_position: int) -> str:
claim_id = claim_hash.hex()
for prefix_len in range(10):
for k in self.prefix_db.claim_short_id.iterate(prefix=(normalized_name, claim_id[:prefix_len+1]),
include_value=False):
if k.root_tx_num == root_tx_num and k.root_position == root_position:
return f'{name}#{k.partial_claim_id}'
break
print(f"{claim_id} has a collision")
return f'{name}#{claim_id}'
def _prepare_resolve_result(self, tx_num: int, position: int, claim_hash: bytes, name: str,
root_tx_num: int, root_position: int, activation_height: int,
signature_valid: bool) -> ResolveResult:
try:
normalized_name = normalize_name(name)
except UnicodeDecodeError:
normalized_name = name
controlling_claim = self.get_controlling_claim(normalized_name)
tx_hash = self.get_tx_hash(tx_num)
height = bisect_right(self.tx_counts, tx_num)
created_height = bisect_right(self.tx_counts, root_tx_num)
last_take_over_height = controlling_claim.height
expiration_height = self.coin.get_expiration_height(height)
support_amount = self.get_support_amount(claim_hash)
claim_amount = self.get_cached_claim_txo(claim_hash).amount
effective_amount = self.get_effective_amount(claim_hash)
channel_hash = self.get_channel_for_claim(claim_hash, tx_num, position)
reposted_claim_hash = self.get_repost(claim_hash)
short_url = self.get_short_claim_id_url(name, normalized_name, claim_hash, root_tx_num, root_position)
canonical_url = short_url
claims_in_channel = self.get_claims_in_channel_count(claim_hash)
if channel_hash:
channel_vals = self.get_cached_claim_txo(channel_hash)
if channel_vals:
channel_short_url = self.get_short_claim_id_url(
channel_vals.name, channel_vals.normalized_name, channel_hash, channel_vals.root_tx_num,
channel_vals.root_position
)
canonical_url = f'{channel_short_url}/{short_url}'
return ResolveResult(
name, normalized_name, claim_hash, tx_num, position, tx_hash, height, claim_amount, short_url=short_url,
is_controlling=controlling_claim.claim_hash == claim_hash, canonical_url=canonical_url,
last_takeover_height=last_take_over_height, claims_in_channel=claims_in_channel,
creation_height=created_height, activation_height=activation_height,
expiration_height=expiration_height, effective_amount=effective_amount, support_amount=support_amount,
channel_hash=channel_hash, reposted_claim_hash=reposted_claim_hash,
reposted=self.get_reposted_count(claim_hash),
signature_valid=None if not channel_hash else signature_valid
)
def _resolve_parsed_url(self, name: str, claim_id: Optional[str] = None,
amount_order: Optional[int] = None) -> Optional[ResolveResult]:
"""
:param normalized_name: name
:param claim_id: partial or complete claim id
:param amount_order: '$<value>' suffix to a url, defaults to 1 (winning) if no claim id modifier is provided
"""
try:
normalized_name = normalize_name(name)
except UnicodeDecodeError:
normalized_name = name
if (not amount_order and not claim_id) or amount_order == 1:
# winning resolution
controlling = self.get_controlling_claim(normalized_name)
if not controlling:
# print(f"none controlling for lbry://{normalized_name}")
return
# print(f"resolved controlling lbry://{normalized_name}#{controlling.claim_hash.hex()}")
return self._fs_get_claim_by_hash(controlling.claim_hash)
amount_order = max(int(amount_order or 1), 1)
if claim_id:
if len(claim_id) == 40: # a full claim id
claim_txo = self.get_claim_txo(bytes.fromhex(claim_id))
if not claim_txo or normalized_name != claim_txo.normalized_name:
return
return self._prepare_resolve_result(
claim_txo.tx_num, claim_txo.position, bytes.fromhex(claim_id), claim_txo.name,
claim_txo.root_tx_num, claim_txo.root_position,
self.get_activation(claim_txo.tx_num, claim_txo.position), claim_txo.channel_signature_is_valid
)
# resolve by partial/complete claim id
for key, claim_txo in self.prefix_db.claim_short_id.iterate(prefix=(normalized_name, claim_id[:10])):
full_claim_hash = self.get_cached_claim_hash(claim_txo.tx_num, claim_txo.position)
c = self.get_cached_claim_txo(full_claim_hash)
non_normalized_name = c.name
signature_is_valid = c.channel_signature_is_valid
return self._prepare_resolve_result(
claim_txo.tx_num, claim_txo.position, full_claim_hash, non_normalized_name, key.root_tx_num,
key.root_position, self.get_activation(claim_txo.tx_num, claim_txo.position),
signature_is_valid
)
return
# resolve by amount ordering, 1 indexed
for idx, (key, claim_val) in enumerate(self.prefix_db.effective_amount.iterate(prefix=(normalized_name,))):
if amount_order > idx + 1:
continue
claim_txo = self.get_cached_claim_txo(claim_val.claim_hash)
activation = self.get_activation(key.tx_num, key.position)
return self._prepare_resolve_result(
key.tx_num, key.position, claim_val.claim_hash, key.normalized_name, claim_txo.root_tx_num,
claim_txo.root_position, activation, claim_txo.channel_signature_is_valid
)
return
def _resolve_claim_in_channel(self, channel_hash: bytes, normalized_name: str):
candidates = []
for key, stream in self.prefix_db.channel_to_claim.iterate(prefix=(channel_hash, normalized_name)):
effective_amount = self.get_effective_amount(stream.claim_hash)
if not candidates or candidates[-1][-1] == effective_amount:
candidates.append((stream.claim_hash, key.tx_num, key.position, effective_amount))
else:
break
if not candidates:
return
return list(sorted(candidates, key=lambda item: item[1]))[0]
def _resolve(self, url) -> ExpandedResolveResult:
try:
parsed = URL.parse(url)
except ValueError as e:
return ExpandedResolveResult(e, None, None, None)
stream = channel = resolved_channel = resolved_stream = None
if parsed.has_stream_in_channel:
channel = parsed.channel
stream = parsed.stream
elif parsed.has_channel:
channel = parsed.channel
elif parsed.has_stream:
stream = parsed.stream
if channel:
resolved_channel = self._resolve_parsed_url(channel.name, channel.claim_id, channel.amount_order)
if not resolved_channel:
return ExpandedResolveResult(None, LookupError(f'Could not find channel in "{url}".'), None, None)
if stream:
if resolved_channel:
stream_claim = self._resolve_claim_in_channel(resolved_channel.claim_hash, stream.normalized)
if stream_claim:
stream_claim_id, stream_tx_num, stream_tx_pos, effective_amount = stream_claim
resolved_stream = self._fs_get_claim_by_hash(stream_claim_id)
else:
resolved_stream = self._resolve_parsed_url(stream.name, stream.claim_id, stream.amount_order)
if not channel and not resolved_channel and resolved_stream and resolved_stream.channel_hash:
resolved_channel = self._fs_get_claim_by_hash(resolved_stream.channel_hash)
if not resolved_stream:
return ExpandedResolveResult(LookupError(f'Could not find claim at "{url}".'), None, None, None)
repost = None
reposted_channel = None
if resolved_stream or resolved_channel:
claim_hash = resolved_stream.claim_hash if resolved_stream else resolved_channel.claim_hash
claim = resolved_stream if resolved_stream else resolved_channel
reposted_claim_hash = resolved_stream.reposted_claim_hash if resolved_stream else None
blocker_hash = self.blocked_streams.get(claim_hash) or self.blocked_streams.get(
reposted_claim_hash) or self.blocked_channels.get(claim_hash) or self.blocked_channels.get(
reposted_claim_hash) or self.blocked_channels.get(claim.channel_hash)
if blocker_hash:
reason_row = self._fs_get_claim_by_hash(blocker_hash)
return ExpandedResolveResult(
None, ResolveCensoredError(url, blocker_hash, censor_row=reason_row), None, None
)
if claim.reposted_claim_hash:
repost = self._fs_get_claim_by_hash(claim.reposted_claim_hash)
if repost and repost.channel_hash and repost.signature_valid:
reposted_channel = self._fs_get_claim_by_hash(repost.channel_hash)
return ExpandedResolveResult(resolved_stream, resolved_channel, repost, reposted_channel)
async def resolve(self, url) -> ExpandedResolveResult:
return await asyncio.get_event_loop().run_in_executor(None, self._resolve, url)
def _fs_get_claim_by_hash(self, claim_hash):
claim = self.get_cached_claim_txo(claim_hash)
if claim:
activation = self.get_activation(claim.tx_num, claim.position)
return self._prepare_resolve_result(
claim.tx_num, claim.position, claim_hash, claim.name, claim.root_tx_num, claim.root_position,
activation, claim.channel_signature_is_valid
)
async def fs_getclaimbyid(self, claim_id):
return await asyncio.get_event_loop().run_in_executor(
None, self._fs_get_claim_by_hash, bytes.fromhex(claim_id)
)
def get_claim_txo_amount(self, claim_hash: bytes) -> Optional[int]:
claim = self.get_claim_txo(claim_hash)
if claim:
return claim.amount
def get_block_hash(self, height: int) -> Optional[bytes]:
v = self.prefix_db.block_hash.get(height)
if v:
return v.block_hash
def get_support_txo_amount(self, claim_hash: bytes, tx_num: int, position: int) -> Optional[int]:
v = self.prefix_db.claim_to_support.get(claim_hash, tx_num, position)
return None if not v else v.amount
def get_claim_txo(self, claim_hash: bytes) -> Optional[ClaimToTXOValue]:
assert claim_hash
return self.prefix_db.claim_to_txo.get(claim_hash)
def _get_active_amount(self, claim_hash: bytes, txo_type: int, height: int) -> int:
return sum(
v.amount for v in self.prefix_db.active_amount.iterate(
start=(claim_hash, txo_type, 0), stop=(claim_hash, txo_type, height), include_key=False
)
)
def get_active_amount_as_of_height(self, claim_hash: bytes, height: int) -> int:
for v in self.prefix_db.active_amount.iterate(
start=(claim_hash, ACTIVATED_CLAIM_TXO_TYPE, 0), stop=(claim_hash, ACTIVATED_CLAIM_TXO_TYPE, height),
include_key=False, reverse=True):
return v.amount
return 0
def get_effective_amount(self, claim_hash: bytes, support_only=False) -> int:
support_amount = self._get_active_amount(claim_hash, ACTIVATED_SUPPORT_TXO_TYPE, self.db_height + 1)
if support_only:
return support_only
return support_amount + self._get_active_amount(claim_hash, ACTIVATED_CLAIM_TXO_TYPE, self.db_height + 1)
def get_url_effective_amount(self, name: str, claim_hash: bytes) -> Optional['EffectiveAmountKey']:
for k, v in self.prefix_db.effective_amount.iterate(prefix=(name,)):
if v.claim_hash == claim_hash:
return k
def get_claims_for_name(self, name):
claims = []
prefix = self.prefix_db.claim_short_id.pack_partial_key(name) + bytes([1])
for _k, _v in self.prefix_db.iterator(prefix=prefix):
v = self.prefix_db.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:
channel_count_val = self.prefix_db.channel_count.get(channel_hash)
if channel_count_val is None:
return 0
return channel_count_val.count
async def reload_blocking_filtering_streams(self):
def reload():
self.blocked_streams, self.blocked_channels = self.get_streams_and_channels_reposted_by_channel_hashes(
self.blocking_channel_hashes
)
self.filtered_streams, self.filtered_channels = self.get_streams_and_channels_reposted_by_channel_hashes(
self.filtering_channel_hashes
)
await asyncio.get_event_loop().run_in_executor(None, reload)
def get_streams_and_channels_reposted_by_channel_hashes(self, reposter_channel_hashes: Set[bytes]):
streams, channels = {}, {}
for reposter_channel_hash in reposter_channel_hashes:
for stream in self.prefix_db.channel_to_claim.iterate((reposter_channel_hash, ), include_key=False):
repost = self.get_repost(stream.claim_hash)
if repost:
txo = self.get_claim_txo(repost)
if txo:
if txo.normalized_name.startswith('@'):
channels[repost] = reposter_channel_hash
else:
streams[repost] = reposter_channel_hash
return streams, channels
def get_channel_for_claim(self, claim_hash, tx_num, position) -> Optional[bytes]:
v = self.prefix_db.claim_to_channel.get(claim_hash, tx_num, position)
if v:
return v.signing_hash
def get_expired_by_height(self, height: int) -> Dict[bytes, Tuple[int, int, str, TxInput]]:
expired = {}
for k, v in self.prefix_db.claim_expiration.iterate(prefix=(height,)):
tx_hash = self.get_tx_hash(k.tx_num)
tx = self.coin.transaction(self.prefix_db.tx.get(tx_hash, deserialize_value=False))
# 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.normalized_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.prefix_db.claim_takeover.get(name)
if not controlling:
return
return controlling
def get_claim_txos_for_name(self, name: str):
txos = {}
prefix = self.prefix_db.claim_short_id.pack_partial_key(name) + int(1).to_bytes(1, byteorder='big')
for k, v in self.prefix_db.iterator(prefix=prefix):
tx_num, nout = self.prefix_db.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.prefix_db.tx.get(tx_hash, deserialize_value=False)
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("claim parsing for ES failed with tx: %s", tx_hash[::-1].hex())
return
def _prepare_claim_metadata(self, claim_hash: bytes, claim: ResolveResult):
metadata = self.get_claim_metadata(claim.tx_hash, claim.position)
if not metadata:
return
metadata = metadata
if not metadata.is_stream or not metadata.stream.has_fee:
fee_amount = 0
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_cached_claim_txo(reposted_claim_hash)
if not reposted_claim:
return
reposted_metadata = self.get_claim_metadata(
self.get_tx_hash(reposted_claim.tx_num), reposted_claim.position
)
if not reposted_metadata:
return
reposted_tags = []
reposted_languages = []
reposted_has_source = False
reposted_claim_type = None
reposted_stream_type = None
reposted_media_type = None
reposted_fee_amount = None
reposted_fee_currency = None
reposted_duration = None
if reposted_claim:
reposted_tx_hash = self.get_tx_hash(reposted_claim.tx_num)
raw_reposted_claim_tx = self.prefix_db.tx.get(reposted_tx_hash, deserialize_value=False)
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()
reposted_metadata = Claim.from_bytes(reposted_script.values['claim'])
except:
self.logger.error("failed to parse reposted claim in tx %s that was reposted by %s",
reposted_tx_hash[::-1].hex(), claim_hash.hex())
return
if reposted_metadata:
if reposted_metadata.is_stream:
meta = reposted_metadata.stream
elif reposted_metadata.is_channel:
meta = reposted_metadata.channel
elif reposted_metadata.is_collection:
meta = reposted_metadata.collection
elif reposted_metadata.is_repost:
meta = reposted_metadata.repost
else:
return
reposted_tags = [tag for tag in meta.tags]
reposted_languages = [lang.language or 'none' for lang in meta.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]
reposted_stream_type = STREAM_TYPES[guess_stream_type(reposted_metadata.stream.source.media_type)] \
if reposted_metadata.is_stream else 0
reposted_media_type = reposted_metadata.stream.source.media_type if reposted_metadata.is_stream else 0
if not reposted_metadata.is_stream or not reposted_metadata.stream.has_fee:
reposted_fee_amount = 0
else:
reposted_fee_amount = int(max(reposted_metadata.stream.fee.amount or 0, 0) * 1000)
if reposted_fee_amount >= 9223372036854775807:
return
reposted_fee_currency = None if not reposted_metadata.is_stream else reposted_metadata.stream.fee.currency
reposted_duration = None
if reposted_metadata.is_stream and \
(reposted_metadata.stream.video.duration or reposted_metadata.stream.audio.duration):
reposted_duration = reposted_metadata.stream.video.duration or reposted_metadata.stream.audio.duration
if metadata.is_stream:
meta = metadata.stream
elif metadata.is_channel:
meta = metadata.channel
elif metadata.is_collection:
meta = metadata.collection
elif metadata.is_repost:
meta = metadata.repost
else:
return
claim_tags = [tag for tag in meta.tags]
claim_languages = [lang.language or 'none' for lang in meta.languages] or ['none']
tags = list(set(claim_tags).union(set(reposted_tags)))
languages = list(set(claim_languages).union(set(reposted_languages)))
blocked_hash = self.blocked_streams.get(claim_hash) or self.blocked_streams.get(
reposted_claim_hash) or self.blocked_channels.get(claim_hash) or self.blocked_channels.get(
reposted_claim_hash) or self.blocked_channels.get(claim.channel_hash)
filtered_hash = self.filtered_streams.get(claim_hash) or self.filtered_streams.get(
reposted_claim_hash) or self.filtered_channels.get(claim_hash) or self.filtered_channels.get(
reposted_claim_hash) or self.filtered_channels.get(claim.channel_hash)
value = {
'claim_id': claim_hash.hex(),
'claim_name': claim.name,
'normalized_name': claim.normalized_name,
'tx_id': claim.tx_hash[::-1].hex(),
'tx_num': claim.tx_num,
'tx_nout': claim.position,
'amount': claim.amount,
'timestamp': self.estimate_timestamp(claim.height),
'creation_timestamp': self.estimate_timestamp(claim.creation_height),
'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': bool(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 metadata.is_repost else (
False if not metadata.is_stream else metadata.stream.has_source),
'stream_type': STREAM_TYPES[guess_stream_type(metadata.stream.source.media_type)]
if metadata.is_stream else reposted_stream_type if metadata.is_repost else 0,
'media_type': metadata.stream.source.media_type
if metadata.is_stream else reposted_media_type if metadata.is_repost else None,
'fee_amount': fee_amount if not metadata.is_repost else reposted_fee_amount,
'fee_currency': metadata.stream.fee.currency
if metadata.is_stream else reposted_fee_currency if metadata.is_repost else None,
'repost_count': self.get_reposted_count(claim_hash),
'reposted_claim_id': None if not reposted_claim_hash else reposted_claim_hash.hex(),
'reposted_claim_type': reposted_claim_type,
'reposted_has_source': reposted_has_source,
'channel_id': None if not metadata.is_signed else metadata.signing_channel_hash[::-1].hex(),
'public_key_id': None if not metadata.is_channel else
self.ledger.public_key_to_address(metadata.channel.public_key_bytes),
'signature': (metadata.signature or b'').hex() or None,
# 'signature_digest': metadata.signature,
'is_signature_valid': bool(claim.signature_valid),
'tags': tags,
'languages': languages,
'censor_type': Censor.RESOLVE if blocked_hash else Censor.SEARCH if filtered_hash else Censor.NOT_CENSORED,
'censoring_channel_id': (blocked_hash or filtered_hash or b'').hex() or None,
'claims_in_channel': None if not metadata.is_channel else self.get_claims_in_channel_count(claim_hash)
}
if metadata.is_repost and reposted_duration is not None:
value['duration'] = reposted_duration
elif 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:
value['release_time'] = metadata.stream.release_time or value['creation_timestamp']
elif metadata.is_repost or metadata.is_collection:
value['release_time'] = value['creation_timestamp']
return value
async def all_claims_producer(self, batch_size=500_000):
batch = []
if self.env.cache_all_claim_txos:
claim_iterator = self.claim_to_txo.items()
else:
claim_iterator = map(lambda item: (item[0].claim_hash, item[1]), self.prefix_db.claim_to_txo.iterate())
for claim_hash, claim_txo in claim_iterator:
# TODO: fix the couple of claim txos that dont have controlling names
if not self.prefix_db.claim_takeover.get(claim_txo.normalized_name):
continue
activation = self.get_activation(claim_txo.tx_num, claim_txo.position)
claim = self._prepare_resolve_result(
claim_txo.tx_num, claim_txo.position, claim_hash, claim_txo.name, claim_txo.root_tx_num,
claim_txo.root_position, activation, claim_txo.channel_signature_is_valid
)
if claim:
batch.append(claim)
if len(batch) == batch_size:
batch.sort(key=lambda x: x.tx_hash) # sort is to improve read-ahead hits
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 claim_producer(self, claim_hash: bytes) -> Optional[Dict]:
claim_txo = self.get_cached_claim_txo(claim_hash)
if not claim_txo:
self.logger.warning("can't sync non existent claim to ES: %s", claim_hash.hex())
return
if not self.prefix_db.claim_takeover.get(claim_txo.normalized_name):
self.logger.warning("can't sync non existent claim to ES: %s", claim_hash.hex())
return
activation = self.get_activation(claim_txo.tx_num, claim_txo.position)
claim = self._prepare_resolve_result(
claim_txo.tx_num, claim_txo.position, claim_hash, claim_txo.name, claim_txo.root_tx_num,
claim_txo.root_position, activation, claim_txo.channel_signature_is_valid
)
if not claim:
return
return self._prepare_claim_metadata(claim.claim_hash, claim)
def claims_producer(self, claim_hashes: Set[bytes]):
batch = []
results = []
for claim_hash in claim_hashes:
claim_txo = self.get_cached_claim_txo(claim_hash)
if not claim_txo:
self.logger.warning("can't sync non existent claim to ES: %s", claim_hash.hex())
continue
if not self.prefix_db.claim_takeover.get(claim_txo.normalized_name):
self.logger.warning("can't sync non existent claim to ES: %s", claim_hash.hex())
continue
activation = self.get_activation(claim_txo.tx_num, claim_txo.position)
claim = self._prepare_resolve_result(
claim_txo.tx_num, claim_txo.position, claim_hash, claim_txo.name, claim_txo.root_tx_num,
claim_txo.root_position, activation, claim_txo.channel_signature_is_valid
)
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:
results.append(_meta)
return results
def get_activated_at_height(self, height: int) -> DefaultDict[PendingActivationValue, List[PendingActivationKey]]:
activated = defaultdict(list)
for k, v in self.prefix_db.pending_activation.iterate(prefix=(height,)):
activated[v].append(k)
return activated
def get_future_activated(self, height: int) -> typing.Dict[PendingActivationValue, PendingActivationKey]:
results = {}
for k, v in self.prefix_db.pending_activation.iterate(
start=(height + 1,), stop=(height + 1 + self.coin.maxTakeoverDelay,), reverse=True):
if v not in results:
results[v] = k
return results
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 [
v.tx_count for v in self.prefix_db.tx_count.iterate(include_key=False, fill_cache=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_claim_txos(self):
def read_claim_txos():
set_claim_to_txo = self.claim_to_txo.__setitem__
for k, v in self.prefix_db.claim_to_txo.iterate(fill_cache=False):
set_claim_to_txo(k.claim_hash, v)
self.txo_to_claim[v.tx_num][v.position] = k.claim_hash
self.claim_to_txo.clear()
self.txo_to_claim.clear()
start = time.perf_counter()
self.logger.info("loading claims")
await asyncio.get_event_loop().run_in_executor(None, read_claim_txos)
ts = time.perf_counter() - start
self.logger.info("loaded %i claim txos in %ss", len(self.claim_to_txo), round(ts, 4))
async def _read_headers(self):
if self.headers is not None:
return
def get_headers():
return [
header for header in self.prefix_db.header.iterate(
include_key=False, fill_cache=False, deserialize_value=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 _read_tx_hashes(self):
def _read_tx_hashes():
return list(self.prefix_db.tx_hash.iterate(include_key=False, fill_cache=False, deserialize_value=False))
self.logger.info("loading tx hashes")
self.total_transactions.clear()
self.tx_num_mapping.clear()
start = time.perf_counter()
self.total_transactions.extend(await asyncio.get_event_loop().run_in_executor(None, _read_tx_hashes))
self.tx_num_mapping = {
tx_hash: tx_num for tx_num, tx_hash in enumerate(self.total_transactions)
}
ts = time.perf_counter() - start
self.logger.info("loaded %i tx hashes in %ss", len(self.total_transactions), round(ts, 4))
def estimate_timestamp(self, height: int) -> int:
if height < len(self.headers):
return struct.unpack('<I', self.headers[height][100:104])[0]
return int(160.6855883050695 * height)
def open_db(self):
if self.prefix_db and not self.prefix_db.closed:
return
self.prefix_db = HubDB(
os.path.join(self.env.db_dir, 'lbry-leveldb'), cache_mb=self.env.cache_MB,
reorg_limit=self.env.reorg_limit, max_open_files=self.env.db_max_open_files,
unsafe_prefixes={DBStatePrefixRow.prefix}
)
self.logger.info(f'opened db: lbry-leveldb')
# 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.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
async def initialize_caches(self):
await self._read_tx_counts()
await self._read_headers()
if self.env.cache_all_claim_txos:
await self._read_claim_txos()
if self.env.cache_all_tx_hashes:
await self._read_tx_hashes()
def close(self):
self.prefix_db.close()
def get_tx_hash(self, tx_num: int) -> bytes:
if self.env.cache_all_tx_hashes:
return self.total_transactions[tx_num]
return self.prefix_db.tx_hash.get(tx_num, deserialize_value=False)
def get_tx_num(self, tx_hash: bytes) -> int:
if self.env.cache_all_tx_hashes:
return self.tx_num_mapping[tx_hash]
return self.prefix_db.tx_num.get(tx_hash).tx_num
def get_cached_claim_txo(self, claim_hash: bytes) -> Optional[ClaimToTXOValue]:
if self.env.cache_all_claim_txos:
return self.claim_to_txo.get(claim_hash)
return self.prefix_db.claim_to_txo.get_pending(claim_hash)
def get_cached_claim_hash(self, tx_num: int, position: int) -> Optional[bytes]:
if self.env.cache_all_claim_txos:
if tx_num not in self.txo_to_claim:
return
return self.txo_to_claim[tx_num].get(position, None)
v = self.prefix_db.txo_to_claim.get_pending(tx_num, position)
return None if not v else v.claim_hash
def get_cached_claim_exists(self, tx_num: int, position: int) -> bool:
return self.get_cached_claim_hash(tx_num, position) is not None
# 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)
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.get_tx_hash(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 get_block_txs(self, height: int) -> List[bytes]:
return self.prefix_db.block_txs.get(height).tx_hashes
async def get_transactions_and_merkles(self, tx_hashes: Iterable[str]):
tx_infos = {}
for tx_hash in tx_hashes:
tx_infos[tx_hash] = await asyncio.get_event_loop().run_in_executor(
None, self._get_transaction_and_merkle, tx_hash
)
await asyncio.sleep(0)
return tx_infos
def _get_transaction_and_merkle(self, tx_hash):
cached_tx = self._tx_and_merkle_cache.get(tx_hash)
if cached_tx:
tx, merkle = cached_tx
else:
tx_hash_bytes = bytes.fromhex(tx_hash)[::-1]
tx_num = self.prefix_db.tx_num.get(tx_hash_bytes)
tx = None
tx_height = -1
tx_num = None if not tx_num else tx_num.tx_num
if tx_num is not None:
if self.env.cache_all_claim_txos:
fill_cache = tx_num in self.txo_to_claim and len(self.txo_to_claim[tx_num]) > 0
else:
fill_cache = False
tx_height = bisect_right(self.tx_counts, tx_num)
tx = self.prefix_db.tx.get(tx_hash_bytes, fill_cache=fill_cache, deserialize_value=False)
if tx_height == -1:
merkle = {
'block_height': -1
}
else:
tx_pos = tx_num - self.tx_counts[tx_height - 1]
branch, root = self.merkle.branch_and_root(
self.get_block_txs(tx_height), tx_pos
)
merkle = {