fixed null claim name support for postgres

lbry/db/query_context.py

@@ -383,31 +383,24 @@ class BulkLoader:
             row['claim_id'] = txo.claim_id
             row['claim_hash'] = txo.claim_hash
             try:
-                claim_name = txo.claim_name
-                if '\x00' in claim_name:
-                    # log.error(f"Name for claim {txo.claim_id} contains a NULL (\\x00) character, skipping.")
-                    pass
-                else:
-                    row['claim_name'] = claim_name
+                row['claim_name'] = txo.claim_name.replace('\x00', '')
             except UnicodeDecodeError:
-                # log.error(f"Name for claim {txo.claim_id} contains invalid unicode, skipping.")
                 pass
         return row
 
     def claim_to_rows(self, txo: Output) -> Tuple[dict, List]:
         try:
-            assert txo.claim_name
-            assert txo.normalized_name
-        except Exception:
-            #self.logger.exception(f"Could not decode claim name for {tx.id}:{txo.position}.")
+            claim_name = txo.claim_name.replace('\x00', '')
+            normalized_name = txo.normalized_name
+        except UnicodeDecodeError:
             return {}, []
         tx = txo.tx_ref.tx
         claim_hash = txo.claim_hash
         claim_record = {
             'claim_hash': claim_hash,
             'claim_id': txo.claim_id,
-            'claim_name': txo.claim_name,
-            'normalized': txo.normalized_name,
+            'claim_name': claim_name,
+            'normalized': normalized_name,
             'address': txo.get_address(self.ledger),
             'txo_hash': txo.ref.hash,
             'amount': txo.amount,

lbry/schema/url.py

@@ -44,7 +44,7 @@ URL_REGEX = _create_url_regex()
 
 
 def normalize_name(name):
-    return unicodedata.normalize('NFD', name).casefold()
+    return unicodedata.normalize('NFD', name).casefold().replace('\x00', '')
 
 
 class PathSegment(NamedTuple):

tests/integration/blockchain/test_blockchain.py

@@ -11,6 +11,7 @@ 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.support import Support
+from lbry.blockchain.script import OutputScript
 from lbry.blockchain.lbrycrd import Lbrycrd
 from lbry.blockchain.sync import BlockchainSync
 from lbry.blockchain.dewies import dewies_to_lbc, lbc_to_dewies
@@ -690,6 +691,12 @@ class TestGeneralBlockchainSync(SyncingBlockchainTestCase):
         claims = await search()
         self.assertEqual(0, len(claims))
 
+    async def test_null_claim_name(self):
+        await self.create_claim(name='\x00')
+        await self.generate(1)
+        empty_name, = await self.db.search_claims()
+        self.assertEqual('', empty_name.normalized_name)
+
     async def test_short_and_canonical_urls(self):
         search = self.db.search_claims