added respoted_count calculation

lbry/blockchain/sync/claims.py

@@ -8,7 +8,8 @@ from lbry.db.queries.txio import (
     minimum_txo_columns, row_to_txo,
     where_unspent_txos, where_claims_with_changed_supports,
     count_unspent_txos, where_channels_with_changed_content,
-    where_abandoned_claims, count_channels_with_changed_content
+    where_abandoned_claims, count_channels_with_changed_content,
+    where_claims_with_changed_reposts,
 )
 from lbry.db.query_context import ProgressContext, event_emitter
 from lbry.db.tables import TX, TXO, Claim, Support, pg_add_claim_and_tag_constraints_and_indexes
@@ -56,6 +57,17 @@ def staked_support_count_calc(other):
     )
 
 
+def reposted_claim_count_calc(other):
+    repost = TXO.alias('repost')
+    return (
+        select(func.coalesce(func.count(repost.c.reposted_claim_hash), 0))
+        .where(
+            (repost.c.reposted_claim_hash == other.c.claim_hash) &
+            (repost.c.spent_height == 0)
+        ).scalar_subquery()
+    )
+
+
 def make_label(action, blocks):
     if blocks[0] == blocks[-1]:
         return f"{action} {blocks[0]:>6}"
@@ -73,6 +85,7 @@ def select_claims_for_saving(
         *minimum_txo_columns, TXO.c.claim_hash,
         staked_support_amount_calc(TXO).label('staked_support_amount'),
         staked_support_count_calc(TXO).label('staked_support_count'),
+        reposted_claim_count_calc(TXO).label('reposted_count'),
         TXO.c.signature, TXO.c.signature_digest,
         case([(
             TXO.c.channel_hash.isnot(None),
@@ -95,6 +108,7 @@ def row_to_claim_for_saving(row) -> Tuple[Output, dict]:
     return row_to_txo(row), {
         'staked_support_amount': int(row.staked_support_amount),
         'staked_support_count': int(row.staked_support_count),
+        'reposted_count': int(row.reposted_count),
         'signature': row.signature,
         'signature_digest': row.signature_digest,
         'channel_public_key': row.channel_public_key
@@ -237,6 +251,18 @@ def update_stakes(blocks: Tuple[int, int], claims: int, p: ProgressContext):
     p.step(result.rowcount)
 
 
+@event_emitter("blockchain.sync.claims.reposts", "claims")
+def update_reposts(blocks: Tuple[int, int], claims: int, p: ProgressContext):
+    p.start(claims)
+    sql = (
+        Claim.update()
+        .where(where_claims_with_changed_reposts(blocks))
+        .values(reposted_count=reposted_claim_count_calc(Claim))
+    )
+    result = p.ctx.execute(sql)
+    p.step(result.rowcount)
+
+
 @event_emitter("blockchain.sync.claims.channels", "channels")
 def update_channel_stats(blocks: Tuple[int, int], initial_sync: int, p: ProgressContext):
     update_sql = Claim.update().values(

lbry/blockchain/sync/synchronizer.py

@@ -217,6 +217,9 @@ class BlockchainSync(Sync):
     async def count_claims_with_changed_supports(self, blocks) -> int:
         return await self.db.run(q.count_claims_with_changed_supports, blocks)
 
+    async def count_claims_with_changed_reposts(self, blocks) -> int:
+        return await self.db.run(q.count_claims_with_changed_reposts, blocks)
+
     async def count_channels_with_changed_content(self, blocks) -> int:
         return await self.db.run(q.count_channels_with_changed_content, blocks)
 
@@ -226,13 +229,13 @@ class BlockchainSync(Sync):
         )
 
     async def sync_claims(self, blocks) -> bool:
-        delete_claims = takeovers = claims_with_changed_supports = 0
+        delete_claims = takeovers = claims_with_changed_supports = claims_with_changed_reposts = 0
         initial_sync = not await self.db.has_claims()
         with Progress(self.db.message_queue, CLAIMS_INIT_EVENT) as p:
             if initial_sync:
                 total, batches = await self.distribute_unspent_txos(CLAIM_TYPE_CODES)
             elif blocks:
-                p.start(4)
+                p.start(5)
                 # 1. content claims to be inserted or updated
                 total = await self.count_unspent_txos(
                     CLAIM_TYPE_CODES, blocks, missing_or_stale_in_claims_table=True
@@ -247,6 +250,10 @@ class BlockchainSync(Sync):
                 claims_with_changed_supports = await self.count_claims_with_changed_supports(blocks)
                 total += claims_with_changed_supports
                 p.step()
+                # 4. claims to be updated with new repost totals
+                claims_with_changed_reposts = await self.count_claims_with_changed_reposts(blocks)
+                total += claims_with_changed_reposts
+                p.step()
                 # 5. claims to be updated due to name takeovers
                 takeovers = await self.count_takeovers(blocks)
                 total += takeovers
@@ -270,6 +277,8 @@ class BlockchainSync(Sync):
                 await self.db.run(claim_phase.update_takeovers, blocks, takeovers)
             if claims_with_changed_supports:
                 await self.db.run(claim_phase.update_stakes, blocks, claims_with_changed_supports)
+            if claims_with_changed_reposts:
+                await self.db.run(claim_phase.update_reposts, blocks, claims_with_changed_reposts)
             if initial_sync:
                 await self.db.run(claim_phase.claims_constraints_and_indexes)
             else:

lbry/db/queries/txio.py

@@ -193,6 +193,31 @@ def count_channels_with_changed_content(blocks: Optional[Tuple[int, int]]):
     return context().fetchone(sql)['total']
 
 
+def where_changed_repost_txos(blocks: Optional[Tuple[int, int]]):
+    return (
+        (TXO.c.txo_type == TXO_TYPES['repost']) & (
+            between(TXO.c.height, blocks[0], blocks[-1]) |
+            between(TXO.c.spent_height, blocks[0], blocks[-1])
+        )
+    )
+
+
+def where_claims_with_changed_reposts(blocks: Optional[Tuple[int, int]]):
+    return Claim.c.claim_hash.in_(
+        select(TXO.c.reposted_claim_hash).where(
+            where_changed_repost_txos(blocks)
+        )
+    )
+
+
+def count_claims_with_changed_reposts(blocks: Optional[Tuple[int, int]]):
+    sql = (
+        select(func.count(distinct(TXO.c.reposted_claim_hash)).label('total'))
+        .where(where_changed_repost_txos(blocks))
+    )
+    return context().fetchone(sql)['total']
+
+
 def select_transactions(cols, account_ids=None, **constraints):
     s: Select = select(*cols).select_from(TX)
     if not {'tx_hash', 'tx_hash__in'}.intersection(constraints):

lbry/db/query_context.py

@@ -476,6 +476,7 @@ class BulkLoader:
             'channel_hash': None,
             'signature': None,
             'signature_digest': None,
+            'reposted_claim_hash': None,
             'public_key': None,
             'public_key_hash': None
         }
@@ -488,6 +489,8 @@ class BulkLoader:
                     row['public_key_hash'] = self.ledger.address_to_hash160(
                         self.ledger.public_key_to_address(claim.channel.public_key_bytes)
                     )
+                elif claim.is_repost:
+                    row['reposted_claim_hash'] = claim.repost.reference.claim_hash
             else:
                 row['txo_type'] = TXO_TYPES['stream']
         elif txo.is_support:
@@ -511,7 +514,7 @@ class BulkLoader:
         return row
 
     def claim_to_rows(
-        self, txo: Output, staked_support_amount: int, staked_support_count: int,
+        self, txo: Output, staked_support_amount: int, staked_support_count: int, reposted_count: int,
         signature: bytes = None, signature_digest: bytes = None, channel_public_key: bytes = None,
     ) -> Tuple[dict, List]:
 
@@ -540,6 +543,7 @@ class BulkLoader:
             'fee_currency': None,
             # reposts
             'reposted_claim_hash': None,
+            'reposted_count': reposted_count,
             # signed claims
             'channel_hash': None,
             'is_signature_valid': None,

lbry/db/tables.py

@@ -133,6 +133,9 @@ TXO = Table(
     Column('signature', LargeBinary, nullable=True),
     Column('signature_digest', LargeBinary, nullable=True),
 
+    # reposts
+    Column('reposted_claim_hash', LargeBinary, nullable=True),
+
     # channels
     Column('public_key', LargeBinary, nullable=True),
     Column('public_key_hash', LargeBinary, nullable=True),
@@ -158,6 +161,13 @@ pg_add_txo_constraints_and_indexes = [
     f"INCLUDE (claim_hash) WHERE txo_type={TXO_TYPES['support']};",
     f"CREATE INDEX txo_spent_supports_by_height ON txo (spent_height DESC) "
     f"INCLUDE (claim_hash) WHERE txo_type={TXO_TYPES['support']};",
+    # for finding claims which need repost totals re-calculated in a block range
+    f"CREATE INDEX txo_added_reposts_by_height ON txo (height DESC) "
+    f"INCLUDE (reposted_claim_hash) WHERE txo_type={TXO_TYPES['repost']};",
+    f"CREATE INDEX txo_spent_reposts_by_height ON txo (spent_height DESC) "
+    f"INCLUDE (reposted_claim_hash) WHERE txo_type={TXO_TYPES['repost']};",
+    "CREATE INDEX txo_reposted_claim_hash ON txo (reposted_claim_hash)"
+    "WHERE reposted_claim_hash IS NOT NULL AND spent_height = 0;",
     "CREATE INDEX txo_height ON txo (height);",
 ]
 
@@ -209,7 +219,6 @@ Claim = Table(
     Column('description', Text, nullable=True),
 
     Column('claim_type', SmallInteger),
-    Column('claim_reposted_count', Integer, server_default='0'),
     Column('staked_support_count', Integer, server_default='0'),
     Column('staked_support_amount', BigInteger, server_default='0'),
 
@@ -221,8 +230,8 @@ Claim = Table(
     Column('duration', Integer, nullable=True),
 
     # reposts
-    Column('reposted_claim_hash', LargeBinary, nullable=True),
+    Column('reposted_claim_hash', LargeBinary, nullable=True),  # on claim doing the repost
-    Column('reposted_count', Integer, server_default='0'),
+    Column('reposted_count', Integer, server_default='0'),  # on claim being reposted
 
     # claims which are channels
     Column('signed_claim_count', Integer, server_default='0'),
@@ -255,6 +264,8 @@ pg_add_claim_and_tag_constraints_and_indexes = [
     # used to count()/sum() claims signed by channel
     "CREATE INDEX signed_content ON claim (channel_hash) "
     "INCLUDE (amount) WHERE is_signature_valid;",
+    # used to count()/sum() reposted claims
+    "CREATE INDEX reposted_content ON claim (reposted_claim_hash);",
     # basic tag indexes
     "ALTER TABLE tag ADD PRIMARY KEY (claim_hash, tag);",
     "CREATE INDEX tags ON tag (tag) INCLUDE (claim_hash);",

lbry/testcase.py

@@ -792,7 +792,7 @@ class EventGenerator:
             yield from self.claims_main_start()
             yield from self.claims_insert(self.claims)
             if self.initial_sync:
-                yield from self.generate("blockchain.sync.claims.indexes", ("steps",), 0, None, (9,), (1,))
+                yield from self.generate("blockchain.sync.claims.indexes", ("steps",), 0, None, (10,), (1,))
             else:
                 yield from self.claims_takeovers(self.takeovers)
                 yield from self.claims_stakes()
@@ -920,12 +920,12 @@ class EventGenerator:
     def spends_steps(self):
         yield from self.generate(
             "blockchain.sync.spends.main", ("steps",), 0, None,
-            (17 if self.initial_sync else 5,),
+            (20 if self.initial_sync else 5,),
             (1,)
         )
 
     def claims_init(self):
-        yield from self.generate("blockchain.sync.claims.init", ("steps",), 0, None, (4,), (1,))
+        yield from self.generate("blockchain.sync.claims.init", ("steps",), 0, None, (5,), (1,))
 
     def claims_main_start(self):
         total = (

tests/integration/blockchain/test_blockchain.py

@@ -9,7 +9,7 @@ from distutils.dir_util import copy_tree, remove_tree
 
 from lbry import Config, Database, RegTestLedger, Transaction, Output, Input
 from lbry.crypto.base58 import Base58
-from lbry.schema.claim import Stream, Channel
+from lbry.schema.claim import Claim, Stream, Channel
 from lbry.schema.result import Outputs
 from lbry.schema.support import Support
 from lbry.error import LbrycrdEventSubscriptionError, LbrycrdUnauthorizedError
@@ -115,9 +115,13 @@ class SyncingBlockchainTestCase(BasicBlockchainTestCase):
 
     async def create_claim(
             self, title='', amount='0.01', name=None, author='', desc='',
-            claim_id_startswith='', sign=None, is_channel=False) -> str:
+            claim_id_startswith='', sign=None, is_channel=False, repost=None) -> str:
         name = name or ('@foo' if is_channel else 'foo')
         if not claim_id_startswith and sign is None and not is_channel:
+            if repost:
+                claim = Claim()
+                claim.repost.reference.claim_id = repost
+            else:
                 claim = Stream().update(title=title, author=author, description=desc).claim
             return await self.chain.claim_name(
                 name, hexlify(claim.to_bytes()).decode(), amount
@@ -872,6 +876,22 @@ class TestGeneralBlockchainSync(SyncingBlockchainTestCase):
         self.assertEqual(0, r.meta['signed_claim_count'])  # channel2 lost abandoned claim
         self.assertEqual(0, r.meta['signed_support_count'])
 
+    async def test_reposts(self):
+        self.stream1 = await self.get_claim(await self.create_claim())
+        claim_id = self.stream1.claim_id
+
+        # in same block
+        self.stream2 = await self.get_claim(await self.create_claim(repost=claim_id))
+        await self.generate(1)
+        r, = await self.db.search_claims(claim_id=claim_id)
+        self.assertEqual(1, r.meta['reposted_count'])
+
+        # in subsequent block
+        self.stream3 = await self.get_claim(await self.create_claim(repost=claim_id))
+        await self.generate(1)
+        r, = await self.db.search_claims(claim_id=claim_id)
+        self.assertEqual(2, r.meta['reposted_count'])
+
     async def resolve_to_claim_id(self, url):
         return (await self.db.resolve([url]))[url].claim_id