address review feedback

cmd/devp2p/internal/ethtest/suite.go

@@ -849,7 +849,7 @@ func (s *Suite) TestBlobViolations(t *utesting.T) {
 		if code, _, err := conn.Read(); err != nil {
 			t.Fatalf("expected disconnect on blob violation, got err: %v", err)
 		} else if code != discMsg {
-			if code == 24 {
+			if code == protoOffset(ethProto)+eth.NewPooledTransactionHashesMsg {
 				// sometimes we'll get a blob transaction hashes announcement before the disconnect
 				// because blob transactions are scheduled to be fetched right away.
 				if code, _, err = conn.Read(); err != nil {

eth/fetcher/tx_fetcher.go

@@ -267,10 +267,6 @@ func (f *TxFetcher) Notify(peer string, types []byte, sizes []uint32, hashes []c
 			if types == nil {
 				unknownMetas = append(unknownMetas, txMetadata{arrival: f.counter})
 			} else {
-				if sizes[i] == 0 {
-					// invalid size parameter, return error
-					return fmt.Errorf("announcement from tx %x had an invalid 0 size metadata", hash)
-				}
 				unknownMetas = append(unknownMetas, txMetadata{kind: types[i], size: sizes[i], arrival: f.counter})
 			}
 			f.counter++