lbry-sdk/lbry/db/sync.py

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2020-06-05 06:35:22 +02:00
# pylint: disable=singleton-comparison
from sqlalchemy.future import select
from .constants import CLAIM_TYPE_CODES
from .queries import get_txos
from .query_context import progress, Event
from .tables import (
TXO, TXI,
Claim
)
def process_inputs(heights):
with progress(Event.INPUT_UPDATE) as p:
if p.ctx.is_sqlite:
address_query = select(TXO.c.address).where(TXI.c.txo_hash == TXO.c.txo_hash)
sql = (
TXI.update()
.values(address=address_query.scalar_subquery())
.where(TXI.c.address == None)
)
else:
sql = (
TXI.update()
.values({TXI.c.address: TXO.c.address})
.where((TXI.c.address == None) & (TXI.c.txo_hash == TXO.c.txo_hash))
)
p.start(1)
p.ctx.execute(sql)
def process_claims(heights):
with progress(Event.CLAIM_DELETE) as p:
p.start(1)
p.ctx.execute(Claim.delete())
with progress(Event.CLAIM_UPDATE) as p:
loader = p.ctx.get_bulk_loader()
for claim in get_txos(
txo_type__in=CLAIM_TYPE_CODES, is_spent=False,
height__gte=heights[0], height__lte=heights[1])[0]:
loader.add_claim(claim)
loader.save()
def process_supports(heights):
pass