lbry-sdk/lbry/wallet/server/db/writer.py

895 lines
39 KiB
Python
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2019-08-26 23:23:43 +02:00
import os
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import apsw
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from typing import Union, Tuple, Set, List
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from itertools import chain
from decimal import Decimal
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from collections import namedtuple
from multiprocessing import Manager
from binascii import unhexlify
from lbry.wallet.server.leveldb import LevelDB
from lbry.wallet.server.util import class_logger
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from lbry.wallet.database import query, constraints_to_sql
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from lbry.schema.tags import clean_tags
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from lbry.schema.mime_types import guess_stream_type
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from lbry.wallet import Ledger, RegTestLedger
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from lbry.wallet.transaction import Transaction, Output
from lbry.wallet.server.db.canonical import register_canonical_functions
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from lbry.wallet.server.db.full_text_search import update_full_text_search, CREATE_FULL_TEXT_SEARCH, first_sync_finished
from lbry.wallet.server.db.trending import TRENDING_ALGORITHMS
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from .common import CLAIM_TYPES, STREAM_TYPES, COMMON_TAGS
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ATTRIBUTE_ARRAY_MAX_LENGTH = 100
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class SQLDB:
PRAGMAS = """
pragma journal_mode=WAL;
"""
CREATE_CLAIM_TABLE = """
create table if not exists claim (
claim_hash bytes primary key,
claim_id text not null,
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claim_name text not null,
normalized text not null,
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txo_hash bytes not null,
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tx_position integer not null,
amount integer not null,
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timestamp integer not null, -- last updated timestamp
creation_timestamp integer not null,
height integer not null, -- last updated height
creation_height integer not null,
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activation_height integer,
expiration_height integer not null,
release_time integer not null,
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short_url text not null, -- normalized#shortest-unique-claim_id
canonical_url text, -- channel's-short_url/normalized#shortest-unique-claim_id-within-channel
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title text,
author text,
description text,
claim_type integer,
reposted integer default 0,
-- streams
stream_type text,
media_type text,
fee_amount integer default 0,
fee_currency text,
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duration integer,
-- reposts
reposted_claim_hash bytes,
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-- claims which are channels
public_key_bytes bytes,
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public_key_hash bytes,
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claims_in_channel integer,
-- claims which are inside channels
channel_hash bytes,
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channel_join integer, -- height at which claim got valid signature / joined channel
signature bytes,
signature_digest bytes,
signature_valid bool,
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effective_amount integer not null default 0,
support_amount integer not null default 0,
trending_group integer not null default 0,
trending_mixed integer not null default 0,
trending_local integer not null default 0,
trending_global integer not null default 0
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);
create index if not exists claim_normalized_idx on claim (normalized, activation_height);
create index if not exists claim_channel_hash_idx on claim (channel_hash, signature, claim_hash);
create index if not exists claim_claims_in_channel_idx on claim (signature_valid, channel_hash, normalized);
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create index if not exists claim_txo_hash_idx on claim (txo_hash);
create index if not exists claim_activation_height_idx on claim (activation_height, claim_hash);
create index if not exists claim_expiration_height_idx on claim (expiration_height);
create index if not exists claim_reposted_claim_hash_idx on claim (reposted_claim_hash);
"""
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CREATE_SUPPORT_TABLE = """
create table if not exists support (
txo_hash bytes primary key,
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tx_position integer not null,
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height integer not null,
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claim_hash bytes not null,
amount integer not null
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);
create index if not exists support_claim_hash_idx on support (claim_hash, height);
"""
CREATE_TAG_TABLE = """
create table if not exists tag (
tag text not null,
claim_hash bytes not null,
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height integer not null
);
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create unique index if not exists tag_claim_hash_tag_idx on tag (claim_hash, tag);
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"""
CREATE_CLAIMTRIE_TABLE = """
create table if not exists claimtrie (
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normalized text primary key,
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claim_hash bytes not null,
last_take_over_height integer not null
);
create index if not exists claimtrie_claim_hash_idx on claimtrie (claim_hash);
"""
SEARCH_INDEXES = """
-- used by any tag clouds
create index if not exists tag_tag_idx on tag (tag, claim_hash);
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-- naked order bys (no filters)
create unique index if not exists claim_release_idx on claim (release_time, claim_hash);
create unique index if not exists claim_trending_idx on claim (trending_group, trending_mixed, claim_hash);
create unique index if not exists claim_effective_amount_idx on claim (effective_amount, claim_hash);
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-- claim_type filter + order by
create unique index if not exists claim_type_release_idx on claim (release_time, claim_type, claim_hash);
create unique index if not exists claim_type_trending_idx on claim (trending_group, trending_mixed, claim_type, claim_hash);
create unique index if not exists claim_type_effective_amount_idx on claim (effective_amount, claim_type, claim_hash);
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-- stream_type filter + order by
create unique index if not exists stream_type_release_idx on claim (stream_type, release_time, claim_hash);
create unique index if not exists stream_type_trending_idx on claim (stream_type, trending_group, trending_mixed, claim_hash);
create unique index if not exists stream_type_effective_amount_idx on claim (stream_type, effective_amount, claim_hash);
-- channel_hash filter + order by
create unique index if not exists channel_hash_release_idx on claim (channel_hash, release_time, claim_hash);
create unique index if not exists channel_hash_trending_idx on claim (channel_hash, trending_group, trending_mixed, claim_hash);
create unique index if not exists channel_hash_effective_amount_idx on claim (channel_hash, effective_amount, claim_hash);
-- duration filter + order by
create unique index if not exists duration_release_idx on claim (duration, release_time, claim_hash);
create unique index if not exists duration_trending_idx on claim (duration, trending_group, trending_mixed, claim_hash);
create unique index if not exists duration_effective_amount_idx on claim (duration, effective_amount, claim_hash);
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-- fee_amount + order by
create unique index if not exists fee_amount_release_idx on claim (fee_amount, release_time, claim_hash);
create unique index if not exists fee_amount_trending_idx on claim (fee_amount, trending_group, trending_mixed, claim_hash);
create unique index if not exists fee_amount_effective_amount_idx on claim (fee_amount, effective_amount, claim_hash);
-- TODO: verify that all indexes below are used
create index if not exists claim_height_normalized_idx on claim (height, normalized asc);
create index if not exists claim_resolve_idx on claim (normalized, claim_id);
create index if not exists claim_id_idx on claim (claim_id, claim_hash);
create index if not exists claim_timestamp_idx on claim (timestamp);
create index if not exists claim_public_key_hash_idx on claim (public_key_hash);
create index if not exists claim_signature_valid_idx on claim (signature_valid);
"""
TAG_INDEXES = '\n'.join(
f"create unique index if not exists tag_{tag_key}_idx on tag (tag, claim_hash) WHERE tag='{tag_value}';"
for tag_value, tag_key in COMMON_TAGS.items()
)
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CREATE_TABLES_QUERY = (
CREATE_CLAIM_TABLE +
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CREATE_FULL_TEXT_SEARCH +
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CREATE_SUPPORT_TABLE +
CREATE_CLAIMTRIE_TABLE +
CREATE_TAG_TABLE
)
def __init__(
self, main, path: str, blocking_channels: list, filtering_channels: list, trending: list):
self.main = main
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self._db_path = path
self.db = None
self.logger = class_logger(__name__, self.__class__.__name__)
self.ledger = Ledger if main.coin.NET == 'mainnet' else RegTestLedger
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self._fts_synced = False
self.state_manager = None
self.blocked_streams = None
self.blocked_channels = None
self.blocking_channel_hashes = {
unhexlify(channel_id)[::-1] for channel_id in blocking_channels if channel_id
}
self.filtered_streams = None
self.filtered_channels = None
self.filtering_channel_hashes = {
unhexlify(channel_id)[::-1] for channel_id in filtering_channels if channel_id
}
self.trending = trending
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def open(self):
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self.db = apsw.Connection(
self._db_path,
flags=(
apsw.SQLITE_OPEN_READWRITE |
apsw.SQLITE_OPEN_CREATE |
apsw.SQLITE_OPEN_URI
)
)
def exec_factory(cursor, statement, bindings):
tpl = namedtuple('row', (d[0] for d in cursor.getdescription()))
cursor.setrowtrace(lambda cursor, row: tpl(*row))
return True
self.db.setexectrace(exec_factory)
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self.execute(self.PRAGMAS)
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self.execute(self.CREATE_TABLES_QUERY)
register_canonical_functions(self.db)
self.state_manager = Manager()
self.blocked_streams = self.state_manager.dict()
self.blocked_channels = self.state_manager.dict()
self.filtered_streams = self.state_manager.dict()
self.filtered_channels = self.state_manager.dict()
self.update_blocked_and_filtered_claims()
for algorithm in self.trending:
algorithm.install(self.db)
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def close(self):
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if self.db is not None:
self.db.close()
if self.state_manager is not None:
self.state_manager.shutdown()
def update_blocked_and_filtered_claims(self):
self.update_claims_from_channel_hashes(
self.blocked_streams, self.blocked_channels, self.blocking_channel_hashes
)
self.update_claims_from_channel_hashes(
self.filtered_streams, self.filtered_channels, self.filtering_channel_hashes
)
self.filtered_streams.update(self.blocked_streams)
self.filtered_channels.update(self.blocked_channels)
def update_claims_from_channel_hashes(self, shared_streams, shared_channels, channel_hashes):
streams, channels = {}, {}
if channel_hashes:
sql = query(
"SELECT repost.channel_hash, repost.reposted_claim_hash, target.claim_type "
"FROM claim as repost JOIN claim AS target ON (target.claim_hash=repost.reposted_claim_hash)", **{
'repost.reposted_claim_hash__is_not_null': 1,
'repost.channel_hash__in': channel_hashes
}
)
for blocked_claim in self.execute(*sql):
if blocked_claim.claim_type == CLAIM_TYPES['stream']:
streams[blocked_claim.reposted_claim_hash] = blocked_claim.channel_hash
elif blocked_claim.claim_type == CLAIM_TYPES['channel']:
channels[blocked_claim.reposted_claim_hash] = blocked_claim.channel_hash
shared_streams.clear()
shared_streams.update(streams)
shared_channels.clear()
shared_channels.update(channels)
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@staticmethod
def _insert_sql(table: str, data: dict) -> Tuple[str, list]:
columns, values = [], []
for column, value in data.items():
columns.append(column)
values.append(value)
sql = (
f"INSERT INTO {table} ({', '.join(columns)}) "
f"VALUES ({', '.join(['?'] * len(values))})"
)
return sql, values
@staticmethod
def _update_sql(table: str, data: dict, where: str,
constraints: Union[list, tuple]) -> Tuple[str, list]:
columns, values = [], []
for column, value in data.items():
columns.append(f"{column} = ?")
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values.append(value)
values.extend(constraints)
return f"UPDATE {table} SET {', '.join(columns)} WHERE {where}", values
@staticmethod
def _delete_sql(table: str, constraints: dict) -> Tuple[str, dict]:
where, values = constraints_to_sql(constraints)
return f"DELETE FROM {table} WHERE {where}", values
def execute(self, *args):
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return self.db.cursor().execute(*args)
def executemany(self, *args):
return self.db.cursor().executemany(*args)
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def begin(self):
self.execute('begin;')
def commit(self):
self.execute('commit;')
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def _upsertable_claims(self, txos: List[Output], header, clear_first=False):
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claim_hashes, claims, tags = set(), [], {}
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for txo in txos:
tx = txo.tx_ref.tx
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try:
assert txo.claim_name
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assert txo.normalized_name
except:
#self.logger.exception(f"Could not decode claim name for {tx.id}:{txo.position}.")
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continue
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claim_hash = txo.claim_hash
claim_hashes.add(claim_hash)
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claim_record = {
'claim_hash': claim_hash,
'claim_id': txo.claim_id,
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'claim_name': txo.claim_name,
'normalized': txo.normalized_name,
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'txo_hash': txo.ref.hash,
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'tx_position': tx.position,
'amount': txo.amount,
'timestamp': header['timestamp'],
'height': tx.height,
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'title': None,
'description': None,
'author': None,
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'duration': None,
'claim_type': None,
'stream_type': None,
'media_type': None,
'release_time': None,
'fee_currency': None,
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'fee_amount': 0,
'reposted_claim_hash': None
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}
claims.append(claim_record)
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try:
claim = txo.claim
except:
#self.logger.exception(f"Could not parse claim protobuf for {tx.id}:{txo.position}.")
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continue
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if claim.is_stream:
claim_record['claim_type'] = CLAIM_TYPES['stream']
claim_record['media_type'] = claim.stream.source.media_type
claim_record['stream_type'] = STREAM_TYPES[guess_stream_type(claim_record['media_type'])]
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claim_record['title'] = claim.stream.title
claim_record['description'] = claim.stream.description
claim_record['author'] = claim.stream.author
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if claim.stream.video and claim.stream.video.duration:
claim_record['duration'] = claim.stream.video.duration
if claim.stream.audio and claim.stream.audio.duration:
claim_record['duration'] = claim.stream.audio.duration
if claim.stream.release_time:
claim_record['release_time'] = claim.stream.release_time
if claim.stream.has_fee:
fee = claim.stream.fee
if isinstance(fee.currency, str):
claim_record['fee_currency'] = fee.currency.lower()
if isinstance(fee.amount, Decimal):
claim_record['fee_amount'] = int(fee.amount*1000)
elif claim.is_repost:
claim_record['claim_type'] = CLAIM_TYPES['repost']
claim_record['reposted_claim_hash'] = claim.repost.reference.claim_hash
elif claim.is_channel:
claim_record['claim_type'] = CLAIM_TYPES['channel']
for tag in clean_tags(claim.message.tags):
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tags[(tag, claim_hash)] = (tag, claim_hash, tx.height)
if clear_first:
self._clear_claim_metadata(claim_hashes)
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if tags:
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self.executemany(
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"INSERT OR IGNORE INTO tag (tag, claim_hash, height) VALUES (?, ?, ?)", tags.values()
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)
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return claims
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def insert_claims(self, txos: List[Output], header):
claims = self._upsertable_claims(txos, header)
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if claims:
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self.executemany("""
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INSERT OR IGNORE INTO claim (
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claim_hash, claim_id, claim_name, normalized, txo_hash, tx_position, amount,
claim_type, media_type, stream_type, timestamp, creation_timestamp,
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fee_currency, fee_amount, title, description, author, duration, height, reposted_claim_hash,
creation_height, release_time, activation_height, expiration_height, short_url)
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VALUES (
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:claim_hash, :claim_id, :claim_name, :normalized, :txo_hash, :tx_position, :amount,
:claim_type, :media_type, :stream_type, :timestamp, :timestamp,
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:fee_currency, :fee_amount, :title, :description, :author, :duration, :height, :reposted_claim_hash, :height,
CASE WHEN :release_time IS NOT NULL THEN :release_time ELSE :timestamp END,
CASE WHEN :normalized NOT IN (SELECT normalized FROM claimtrie) THEN :height END,
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CASE WHEN :height >= 137181 THEN :height+2102400 ELSE :height+262974 END,
:claim_name||COALESCE(
(SELECT shortest_id(claim_id, :claim_id) FROM claim WHERE normalized = :normalized),
'#'||substr(:claim_id, 1, 1)
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)
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)""", claims)
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def update_claims(self, txos: List[Output], header):
claims = self._upsertable_claims(txos, header, clear_first=True)
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if claims:
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self.executemany("""
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UPDATE claim SET
txo_hash=:txo_hash, tx_position=:tx_position, amount=:amount, height=:height,
claim_type=:claim_type, media_type=:media_type, stream_type=:stream_type,
timestamp=:timestamp, fee_amount=:fee_amount, fee_currency=:fee_currency,
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title=:title, duration=:duration, description=:description, author=:author, reposted_claim_hash=:reposted_claim_hash,
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release_time=CASE WHEN :release_time IS NOT NULL THEN :release_time ELSE release_time END
WHERE claim_hash=:claim_hash;
""", claims)
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def delete_claims(self, claim_hashes: Set[bytes]):
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""" Deletes claim supports and from claimtrie in case of an abandon. """
if claim_hashes:
affected_channels = self.execute(*query(
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"SELECT channel_hash FROM claim", channel_hash__is_not_null=1, claim_hash__in=claim_hashes
)).fetchall()
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for table in ('claim', 'support', 'claimtrie'):
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self.execute(*self._delete_sql(table, {'claim_hash__in': claim_hashes}))
self._clear_claim_metadata(claim_hashes)
return {r.channel_hash for r in affected_channels}
return set()
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def delete_claims_above_height(self, height: int):
claim_hashes = [x[0] for x in self.execute(
"SELECT claim_hash FROM claim WHERE height>=?", (height, )
).fetchall()]
while claim_hashes:
batch = set(claim_hashes[:500])
claim_hashes = claim_hashes[500:]
self.delete_claims(batch)
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def _clear_claim_metadata(self, claim_hashes: Set[bytes]):
if claim_hashes:
for table in ('tag',): # 'language', 'location', etc
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self.execute(*self._delete_sql(table, {'claim_hash__in': claim_hashes}))
def split_inputs_into_claims_supports_and_other(self, txis):
txo_hashes = {txi.txo_ref.hash for txi in txis}
claims = self.execute(*query(
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"SELECT txo_hash, claim_hash, normalized FROM claim", txo_hash__in=txo_hashes
)).fetchall()
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txo_hashes -= {r.txo_hash for r in claims}
supports = {}
if txo_hashes:
supports = self.execute(*query(
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"SELECT txo_hash, claim_hash FROM support", txo_hash__in=txo_hashes
)).fetchall()
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txo_hashes -= {r.txo_hash for r in supports}
return claims, supports, txo_hashes
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def insert_supports(self, txos: List[Output]):
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supports = []
for txo in txos:
tx = txo.tx_ref.tx
supports.append((
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txo.ref.hash, tx.position, tx.height,
txo.claim_hash, txo.amount
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))
if supports:
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self.executemany(
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"INSERT OR IGNORE INTO support ("
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" txo_hash, tx_position, height, claim_hash, amount"
") "
"VALUES (?, ?, ?, ?, ?)", supports
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)
def delete_supports(self, txo_hashes: Set[bytes]):
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if txo_hashes:
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self.execute(*self._delete_sql('support', {'txo_hash__in': txo_hashes}))
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def calculate_reposts(self, txos: List[Output]):
targets = set()
for txo in txos:
try:
claim = txo.claim
except:
continue
if claim.is_repost:
targets.add((claim.repost.reference.claim_hash,))
if targets:
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self.executemany(
"""
UPDATE claim SET reposted = (
SELECT count(*) FROM claim AS repost WHERE repost.reposted_claim_hash = claim.claim_hash
)
WHERE claim_hash = ?
""", targets
)
def validate_channel_signatures(self, height, new_claims, updated_claims, spent_claims, affected_channels, timer):
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if not new_claims and not updated_claims and not spent_claims:
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return
sub_timer = timer.add_timer('segregate channels and signables')
sub_timer.start()
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channels, new_channel_keys, signables = {}, {}, {}
for txo in chain(new_claims, updated_claims):
try:
claim = txo.claim
except:
continue
if claim.is_channel:
channels[txo.claim_hash] = txo
new_channel_keys[txo.claim_hash] = claim.channel.public_key_bytes
else:
signables[txo.claim_hash] = txo
sub_timer.stop()
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sub_timer = timer.add_timer('make list of channels we need to lookup')
sub_timer.start()
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missing_channel_keys = set()
for txo in signables.values():
claim = txo.claim
if claim.is_signed and claim.signing_channel_hash not in new_channel_keys:
missing_channel_keys.add(claim.signing_channel_hash)
sub_timer.stop()
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sub_timer = timer.add_timer('lookup missing channels')
sub_timer.start()
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all_channel_keys = {}
if new_channel_keys or missing_channel_keys or affected_channels:
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all_channel_keys = dict(self.execute(*query(
"SELECT claim_hash, public_key_bytes FROM claim",
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claim_hash__in=set(new_channel_keys) | missing_channel_keys | affected_channels
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)))
sub_timer.stop()
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sub_timer = timer.add_timer('prepare for updating claims')
sub_timer.start()
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changed_channel_keys = {}
for claim_hash, new_key in new_channel_keys.items():
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if claim_hash not in all_channel_keys or all_channel_keys[claim_hash] != new_key:
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all_channel_keys[claim_hash] = new_key
changed_channel_keys[claim_hash] = new_key
claim_updates = []
for claim_hash, txo in signables.items():
claim = txo.claim
update = {
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'claim_hash': claim_hash,
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'channel_hash': None,
'signature': None,
'signature_digest': None,
'signature_valid': None
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}
if claim.is_signed:
update.update({
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'channel_hash': claim.signing_channel_hash,
'signature': txo.get_encoded_signature(),
'signature_digest': txo.get_signature_digest(self.ledger),
'signature_valid': 0
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})
claim_updates.append(update)
sub_timer.stop()
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sub_timer = timer.add_timer('find claims affected by a change in channel key')
sub_timer.start()
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if changed_channel_keys:
sql = f"""
SELECT * FROM claim WHERE
channel_hash IN ({','.join('?' for _ in changed_channel_keys)}) AND
signature IS NOT NULL
"""
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for affected_claim in self.execute(sql, changed_channel_keys.keys()):
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if affected_claim.claim_hash not in signables:
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claim_updates.append({
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'claim_hash': affected_claim.claim_hash,
'channel_hash': affected_claim.channel_hash,
'signature': affected_claim.signature,
'signature_digest': affected_claim.signature_digest,
'signature_valid': 0
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})
sub_timer.stop()
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sub_timer = timer.add_timer('verify signatures')
sub_timer.start()
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for update in claim_updates:
channel_pub_key = all_channel_keys.get(update['channel_hash'])
if channel_pub_key and update['signature']:
update['signature_valid'] = Output.is_signature_valid(
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bytes(update['signature']), bytes(update['signature_digest']), channel_pub_key
)
sub_timer.stop()
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sub_timer = timer.add_timer('update claims')
sub_timer.start()
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if claim_updates:
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self.executemany(f"""
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UPDATE claim SET
channel_hash=:channel_hash, signature=:signature, signature_digest=:signature_digest,
signature_valid=:signature_valid,
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channel_join=CASE
WHEN signature_valid=1 AND :signature_valid=1 AND channel_hash=:channel_hash THEN channel_join
WHEN :signature_valid=1 THEN {height}
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END,
canonical_url=CASE
WHEN signature_valid=1 AND :signature_valid=1 AND channel_hash=:channel_hash THEN canonical_url
WHEN :signature_valid=1 THEN
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(SELECT short_url FROM claim WHERE claim_hash=:channel_hash)||'/'||
claim_name||COALESCE(
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(SELECT shortest_id(other_claim.claim_id, claim.claim_id) FROM claim AS other_claim
WHERE other_claim.signature_valid = 1 AND
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other_claim.channel_hash = :channel_hash AND
other_claim.normalized = claim.normalized),
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'#'||substr(claim_id, 1, 1)
)
END
WHERE claim_hash=:claim_hash;
""", claim_updates)
sub_timer.stop()
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sub_timer = timer.add_timer('update claims affected by spent channels')
sub_timer.start()
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if spent_claims:
self.execute(
f"""
UPDATE claim SET
signature_valid=CASE WHEN signature IS NOT NULL THEN 0 END,
channel_join=NULL, canonical_url=NULL
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WHERE channel_hash IN ({','.join('?' for _ in spent_claims)})
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""", spent_claims
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)
sub_timer.stop()
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sub_timer = timer.add_timer('update channels')
sub_timer.start()
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if channels:
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self.executemany(
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"""
UPDATE claim SET
public_key_bytes=:public_key_bytes,
public_key_hash=:public_key_hash
WHERE claim_hash=:claim_hash""", [{
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'claim_hash': claim_hash,
'public_key_bytes': txo.claim.channel.public_key_bytes,
'public_key_hash': self.ledger.address_to_hash160(
self.ledger.public_key_to_address(txo.claim.channel.public_key_bytes)
)
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} for claim_hash, txo in channels.items()]
)
sub_timer.stop()
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sub_timer = timer.add_timer('update claims_in_channel counts')
sub_timer.start()
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if all_channel_keys:
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self.executemany(f"""
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UPDATE claim SET
claims_in_channel=(
SELECT COUNT(*) FROM claim AS claim_in_channel
WHERE claim_in_channel.signature_valid=1 AND
claim_in_channel.channel_hash=claim.claim_hash
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)
WHERE claim_hash = ?
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""", [(channel_hash,) for channel_hash in all_channel_keys.keys()])
sub_timer.stop()
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sub_timer = timer.add_timer('update blocked claims list')
sub_timer.start()
if (self.blocking_channel_hashes.intersection(all_channel_keys) or
self.filtering_channel_hashes.intersection(all_channel_keys)):
self.update_blocked_and_filtered_claims()
sub_timer.stop()
def _update_support_amount(self, claim_hashes):
if claim_hashes:
self.execute(f"""
UPDATE claim SET
support_amount = COALESCE(
(SELECT SUM(amount) FROM support WHERE support.claim_hash=claim.claim_hash), 0
)
WHERE claim_hash IN ({','.join('?' for _ in claim_hashes)})
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""", claim_hashes)
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def _update_effective_amount(self, height, claim_hashes=None):
self.execute(
f"UPDATE claim SET effective_amount = amount + support_amount "
f"WHERE activation_height = {height}"
)
if claim_hashes:
self.execute(
f"UPDATE claim SET effective_amount = amount + support_amount "
f"WHERE activation_height < {height} "
f" AND claim_hash IN ({','.join('?' for _ in claim_hashes)})",
claim_hashes
)
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def _calculate_activation_height(self, height):
last_take_over_height = f"""COALESCE(
(SELECT last_take_over_height FROM claimtrie
WHERE claimtrie.normalized=claim.normalized),
{height}
)
"""
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self.execute(f"""
UPDATE claim SET activation_height =
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{height} + min(4032, cast(({height} - {last_take_over_height}) / 32 AS INT))
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WHERE activation_height IS NULL
""")
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def _perform_overtake(self, height, changed_claim_hashes, deleted_names):
deleted_names_sql = claim_hashes_sql = ""
if changed_claim_hashes:
claim_hashes_sql = f"OR claim_hash IN ({','.join('?' for _ in changed_claim_hashes)})"
if deleted_names:
deleted_names_sql = f"OR normalized IN ({','.join('?' for _ in deleted_names)})"
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overtakes = self.execute(f"""
SELECT winner.normalized, winner.claim_hash,
claimtrie.claim_hash AS current_winner,
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MAX(winner.effective_amount) AS max_winner_effective_amount
FROM (
SELECT normalized, claim_hash, effective_amount FROM claim
WHERE normalized IN (
SELECT normalized FROM claim WHERE activation_height={height} {claim_hashes_sql}
) {deleted_names_sql}
ORDER BY effective_amount DESC, height ASC, tx_position ASC
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) AS winner LEFT JOIN claimtrie USING (normalized)
GROUP BY winner.normalized
HAVING current_winner IS NULL OR current_winner <> winner.claim_hash
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""", list(changed_claim_hashes)+deleted_names)
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for overtake in overtakes:
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if overtake.current_winner:
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self.execute(
f"UPDATE claimtrie SET claim_hash = ?, last_take_over_height = {height} "
f"WHERE normalized = ?",
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(overtake.claim_hash, overtake.normalized)
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)
else:
self.execute(
f"INSERT INTO claimtrie (claim_hash, normalized, last_take_over_height) "
f"VALUES (?, ?, {height})",
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(overtake.claim_hash, overtake.normalized)
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)
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self.execute(
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f"UPDATE claim SET activation_height = {height} WHERE normalized = ? "
f"AND (activation_height IS NULL OR activation_height > {height})",
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(overtake.normalized,)
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)
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def _copy(self, height):
if height > 50:
self.execute(f"DROP TABLE claimtrie{height-50}")
self.execute(f"CREATE TABLE claimtrie{height} AS SELECT * FROM claimtrie")
def update_claimtrie(self, height, changed_claim_hashes, deleted_names, timer):
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r = timer.run
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r(self._calculate_activation_height, height)
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r(self._update_support_amount, changed_claim_hashes)
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r(self._update_effective_amount, height, changed_claim_hashes)
r(self._perform_overtake, height, changed_claim_hashes, list(deleted_names))
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r(self._update_effective_amount, height)
r(self._perform_overtake, height, [], [])
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def get_expiring(self, height):
return self.execute(
f"SELECT claim_hash, normalized FROM claim WHERE expiration_height = {height}"
)
def advance_txs(self, height, all_txs, header, daemon_height, timer):
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insert_claims = []
update_claims = []
update_claim_hashes = set()
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delete_claim_hashes = set()
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insert_supports = []
delete_support_txo_hashes = set()
recalculate_claim_hashes = set() # added/deleted supports, added/updated claim
deleted_claim_names = set()
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delete_others = set()
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body_timer = timer.add_timer('body')
for position, (etx, txid) in enumerate(all_txs):
tx = timer.run(
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Transaction, etx.raw, height=height, position=position
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)
# Inputs
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spent_claims, spent_supports, spent_others = timer.run(
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self.split_inputs_into_claims_supports_and_other, tx.inputs
)
body_timer.start()
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delete_claim_hashes.update({r.claim_hash for r in spent_claims})
deleted_claim_names.update({r.normalized for r in spent_claims})
delete_support_txo_hashes.update({r.txo_hash for r in spent_supports})
recalculate_claim_hashes.update({r.claim_hash for r in spent_supports})
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delete_others.update(spent_others)
# Outputs
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for output in tx.outputs:
if output.is_support:
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insert_supports.append(output)
recalculate_claim_hashes.add(output.claim_hash)
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elif output.script.is_claim_name:
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insert_claims.append(output)
recalculate_claim_hashes.add(output.claim_hash)
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elif output.script.is_update_claim:
claim_hash = output.claim_hash
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update_claims.append(output)
recalculate_claim_hashes.add(claim_hash)
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body_timer.stop()
skip_update_claim_timer = timer.add_timer('skip update of abandoned claims')
skip_update_claim_timer.start()
for updated_claim in list(update_claims):
if updated_claim.ref.hash in delete_others:
update_claims.remove(updated_claim)
for updated_claim in update_claims:
claim_hash = updated_claim.claim_hash
delete_claim_hashes.discard(claim_hash)
update_claim_hashes.add(claim_hash)
skip_update_claim_timer.stop()
skip_insert_claim_timer = timer.add_timer('skip insertion of abandoned claims')
skip_insert_claim_timer.start()
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for new_claim in list(insert_claims):
if new_claim.ref.hash in delete_others:
if new_claim.claim_hash not in update_claim_hashes:
insert_claims.remove(new_claim)
skip_insert_claim_timer.stop()
skip_insert_support_timer = timer.add_timer('skip insertion of abandoned supports')
skip_insert_support_timer.start()
for new_support in list(insert_supports):
if new_support.ref.hash in delete_others:
insert_supports.remove(new_support)
skip_insert_support_timer.stop()
expire_timer = timer.add_timer('recording expired claims')
expire_timer.start()
for expired in self.get_expiring(height):
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delete_claim_hashes.add(expired.claim_hash)
deleted_claim_names.add(expired.normalized)
expire_timer.stop()
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r = timer.run
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r(update_full_text_search, 'before-delete',
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delete_claim_hashes, self.db.cursor(), self.main.first_sync)
affected_channels = r(self.delete_claims, delete_claim_hashes)
r(self.delete_supports, delete_support_txo_hashes)
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r(self.insert_claims, insert_claims, header)
r(self.calculate_reposts, insert_claims)
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r(update_full_text_search, 'after-insert',
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[txo.claim_hash for txo in insert_claims], self.db.cursor(), self.main.first_sync)
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r(update_full_text_search, 'before-update',
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[txo.claim_hash for txo in update_claims], self.db.cursor(), self.main.first_sync)
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r(self.update_claims, update_claims, header)
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r(update_full_text_search, 'after-update',
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[txo.claim_hash for txo in update_claims], self.db.cursor(), self.main.first_sync)
r(self.validate_channel_signatures, height, insert_claims,
update_claims, delete_claim_hashes, affected_channels, forward_timer=True)
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r(self.insert_supports, insert_supports)
r(self.update_claimtrie, height, recalculate_claim_hashes, deleted_claim_names, forward_timer=True)
for algorithm in self.trending:
r(algorithm.run, self.db.cursor(), height, daemon_height, recalculate_claim_hashes)
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if not self._fts_synced and self.main.first_sync and height == daemon_height:
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r(first_sync_finished, self.db.cursor())
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self._fts_synced = True
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class LBRYLevelDB(LevelDB):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
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path = os.path.join(self.env.db_dir, 'claims.db')
trending = []
for algorithm_name in self.env.trending_algorithms:
if algorithm_name in TRENDING_ALGORITHMS:
trending.append(TRENDING_ALGORITHMS[algorithm_name])
self.sql = SQLDB(
self, path,
self.env.default('BLOCKING_CHANNEL_IDS', '').split(' '),
self.env.default('FILTERING_CHANNEL_IDS', '').split(' '),
trending
)
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def close(self):
super().close()
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self.sql.close()
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async def _open_dbs(self, *args, **kwargs):
await super()._open_dbs(*args, **kwargs)
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self.sql.open()