180 lines
7.2 KiB
Python
180 lines
7.2 KiB
Python
import logging
|
|
|
|
from sqlalchemy import table, bindparam, text, func, union
|
|
from sqlalchemy.future import select
|
|
from sqlalchemy.schema import CreateTable
|
|
|
|
from lbry.db.tables import Block as BlockTable, TX, TXO, TXI
|
|
from lbry.db.tables import (
|
|
pg_add_tx_constraints_and_indexes,
|
|
pg_add_txo_constraints_and_indexes,
|
|
pg_add_txi_constraints_and_indexes,
|
|
)
|
|
from lbry.db.query_context import ProgressContext, event_emitter, context
|
|
from lbry.db.sync import set_input_addresses, update_spent_outputs
|
|
from lbry.blockchain.block import Block, create_block_filter
|
|
from lbry.blockchain.bcd_data_stream import BCDataStream
|
|
|
|
from .context import get_or_initialize_lbrycrd
|
|
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
def get_best_block_height_for_file(file_number):
|
|
return context().fetchone(
|
|
select(func.coalesce(func.max(BlockTable.c.height), -1).label('height'))
|
|
.where(BlockTable.c.file_number == file_number)
|
|
)['height']
|
|
|
|
|
|
@event_emitter("blockchain.sync.blocks.file", "blocks", "txs", throttle=100)
|
|
def sync_block_file(
|
|
file_number: int, start_height: int, txs: int, flush_size: int, p: ProgressContext
|
|
):
|
|
chain = get_or_initialize_lbrycrd(p.ctx)
|
|
new_blocks = chain.db.sync_get_blocks_in_file(file_number, start_height)
|
|
if not new_blocks:
|
|
return -1
|
|
file_name = chain.get_block_file_name(file_number)
|
|
p.start(len(new_blocks), txs, progress_id=file_number, label=file_name)
|
|
block_file_path = chain.get_block_file_path(file_number)
|
|
done_blocks = done_txs = 0
|
|
last_block_processed, loader = -1, p.ctx.get_bulk_loader()
|
|
with open(block_file_path, "rb") as fp:
|
|
stream = BCDataStream(fp=fp)
|
|
for done_blocks, block_info in enumerate(new_blocks, start=1):
|
|
block_height = block_info["height"]
|
|
fp.seek(block_info["data_offset"])
|
|
block = Block.from_data_stream(stream, block_height, file_number)
|
|
loader.add_block(block)
|
|
if len(loader.txs) >= flush_size:
|
|
done_txs += loader.flush(TX)
|
|
p.step(done_blocks, done_txs)
|
|
last_block_processed = block_height
|
|
if p.ctx.stop_event.is_set():
|
|
return last_block_processed
|
|
if loader.txs:
|
|
done_txs += loader.flush(TX)
|
|
p.step(done_blocks, done_txs)
|
|
return last_block_processed
|
|
|
|
|
|
@event_emitter("blockchain.sync.spends.main", "steps")
|
|
def sync_spends(initial_sync: bool, p: ProgressContext):
|
|
if initial_sync:
|
|
p.start(
|
|
6 +
|
|
len(pg_add_tx_constraints_and_indexes) +
|
|
len(pg_add_txi_constraints_and_indexes) +
|
|
len(pg_add_txo_constraints_and_indexes)
|
|
)
|
|
for constraint in pg_add_tx_constraints_and_indexes:
|
|
if p.ctx.is_postgres:
|
|
p.ctx.execute(text(constraint))
|
|
p.step()
|
|
# A. Update TXIs to have the address of TXO they are spending.
|
|
# 1. txi table reshuffling
|
|
p.ctx.execute(text("ALTER TABLE txi RENAME TO old_txi;"))
|
|
p.ctx.execute(CreateTable(TXI, include_foreign_key_constraints=[]))
|
|
if p.ctx.is_postgres:
|
|
p.ctx.execute(text("ALTER TABLE txi DROP CONSTRAINT txi_pkey;"))
|
|
p.step()
|
|
# 2. insert
|
|
old_txi = table("old_txi", *(c.copy() for c in TXI.columns)) # pylint: disable=not-an-iterable
|
|
columns = [c for c in old_txi.columns if c.name != "address"] + [TXO.c.address]
|
|
join_txi_on_txo = old_txi.join(TXO, old_txi.c.txo_hash == TXO.c.txo_hash)
|
|
select_txis = select(*columns).select_from(join_txi_on_txo)
|
|
insert_txis = TXI.insert().from_select(columns, select_txis)
|
|
p.ctx.execute(insert_txis)
|
|
p.step()
|
|
# 3. drop old txi and vacuum
|
|
p.ctx.execute(text("DROP TABLE old_txi;"))
|
|
if p.ctx.is_postgres:
|
|
p.ctx.execute_notx(text("VACUUM ANALYZE txi;"))
|
|
p.step()
|
|
for constraint in pg_add_txi_constraints_and_indexes:
|
|
if p.ctx.is_postgres:
|
|
p.ctx.execute(text(constraint))
|
|
p.step()
|
|
# B. Update TXOs to have the height at which they were spent (if they were).
|
|
# 4. txo table reshuffling
|
|
p.ctx.execute(text("ALTER TABLE txo RENAME TO old_txo;"))
|
|
p.ctx.execute(CreateTable(TXO, include_foreign_key_constraints=[]))
|
|
if p.ctx.is_postgres:
|
|
p.ctx.execute(text("ALTER TABLE txo DROP CONSTRAINT txo_pkey;"))
|
|
p.step()
|
|
# 5. insert
|
|
old_txo = table("old_txo", *(c.copy() for c in TXO.columns)) # pylint: disable=not-an-iterable
|
|
columns = [c for c in old_txo.columns if c.name != "spent_height"]
|
|
insert_columns = columns + [TXO.c.spent_height]
|
|
select_columns = columns + [func.coalesce(TXI.c.height, 0).label("spent_height")]
|
|
join_txo_on_txi = old_txo.join(TXI, old_txo.c.txo_hash == TXI.c.txo_hash, isouter=True)
|
|
select_txos = select(*select_columns).select_from(join_txo_on_txi)
|
|
insert_txos = TXO.insert().from_select(insert_columns, select_txos)
|
|
p.ctx.execute(insert_txos)
|
|
p.step()
|
|
# 6. drop old txo
|
|
p.ctx.execute(text("DROP TABLE old_txo;"))
|
|
if p.ctx.is_postgres:
|
|
p.ctx.execute_notx(text("VACUUM ANALYZE txo;"))
|
|
p.step()
|
|
for constraint in pg_add_txo_constraints_and_indexes:
|
|
if p.ctx.is_postgres:
|
|
p.ctx.execute(text(constraint))
|
|
p.step()
|
|
else:
|
|
p.start(3)
|
|
# 1. Update spent TXOs setting spent_height
|
|
update_spent_outputs(p.ctx)
|
|
p.step()
|
|
# 2. Update TXIs to have the address of TXO they are spending.
|
|
set_input_addresses(p.ctx)
|
|
p.step()
|
|
# 3. Update visibility map, which speeds up index-only scans.
|
|
if p.ctx.is_postgres:
|
|
p.ctx.execute_notx(text("VACUUM txo;"))
|
|
p.step()
|
|
|
|
|
|
@event_emitter("blockchain.sync.filter.generate", "blocks")
|
|
def sync_block_filters(p: ProgressContext):
|
|
blocks = []
|
|
all_filters = []
|
|
all_addresses = []
|
|
for block in get_blocks_without_filters():
|
|
addresses = {
|
|
p.ctx.ledger.address_to_hash160(r["address"])
|
|
for r in get_block_tx_addresses(block_hash=block["block_hash"])
|
|
}
|
|
all_addresses.extend(addresses)
|
|
block_filter = create_block_filter(addresses)
|
|
all_filters.append(block_filter)
|
|
blocks.append({"pk": block["block_hash"], "block_filter": block_filter})
|
|
p.ctx.execute(
|
|
BlockTable.update().where(BlockTable.c.block_hash == bindparam("pk")), blocks
|
|
)
|
|
|
|
|
|
def get_blocks_without_filters():
|
|
return context().fetchall(
|
|
select(BlockTable.c.block_hash)
|
|
.where(BlockTable.c.block_filter.is_(None))
|
|
)
|
|
|
|
|
|
def get_block_tx_addresses(block_hash=None, tx_hash=None):
|
|
if block_hash is not None:
|
|
constraint = (TX.c.block_hash == block_hash)
|
|
elif tx_hash is not None:
|
|
constraint = (TX.c.tx_hash == tx_hash)
|
|
else:
|
|
raise ValueError('block_hash or tx_hash must be provided.')
|
|
return context().fetchall(
|
|
union(
|
|
select(TXO.c.address).select_from(TXO.join(TX))
|
|
.where((TXO.c.address.isnot_(None)) & constraint),
|
|
select(TXI.c.address).select_from(TXI.join(TX))
|
|
.where((TXI.c.address.isnot_(None)) & constraint),
|
|
)
|
|
)
|