refactor(store): add missing error checks in store

store/iavl/store.go

@@ -223,7 +223,9 @@
 // Implements types.KVStore.
 func (st *Store) Delete(key []byte) {
 	defer telemetry.MeasureSince(time.Now(), "store", "iavl", "delete")
-	st.tree.Remove(key)
+	if _, _, err := st.tree.Remove(key); err != nil {
+		panic(err)
+	}
 }
 
 // DeleteVersions deletes a series of versions from the MutableTree. An error
@@ -370,7 +372,8 @@
 		for ; iterator.Valid(); iterator.Next() {
 			pairs.Pairs = append(pairs.Pairs, kv.Pair{Key: iterator.Key(), Value: iterator.Value()})
 		}
-		iterator.Close()
+
+		_ = iterator.Close()
 
 		bz, err := pairs.Marshal()
 		if err != nil {

store/listenkv/store.go

@@ -144,6 +144,8 @@
 // onWrite writes a KVStore operation to all of the WriteListeners
 func (s *Store) onWrite(delete bool, key, value []byte) {
 	for _, l := range s.listeners {
-		l.OnWrite(s.parentStoreKey, key, value, delete)
+		if err := l.OnWrite(s.parentStoreKey, key, value, delete); err != nil {
+			panic(err)
+		}
 	}
 }

store/rootmulti/store.go

@@ -312,7 +312,7 @@ func deleteKVStore(kv types.KVStore) error {
 		keys = append(keys, itr.Key())
 		itr.Next()
 	}
-	itr.Close()
+	_ = itr.Close()
 
 	for _, k := range keys {
 		kv.Delete(k)
@@ -328,7 +328,7 @@ func moveKVStoreData(oldDB types.KVStore, newDB types.KVStore) error {
 		newDB.Set(itr.Key(), itr.Value())
 		itr.Next()
 	}
-	itr.Close()
+	_ = itr.Close()
 
 	// then delete the old store
 	return deleteKVStore(oldDB)
@@ -1068,7 +1068,9 @@ func (rs *Store) GetCommitInfo(ver int64) (*types.CommitInfo, error) {
 func (rs *Store) flushMetadata(db dbm.DB, version int64, cInfo *types.CommitInfo) {
 	rs.logger.Debug("flushing metadata", "height", version)
 	batch := db.NewBatch()
-	defer batch.Close()
+	defer func() {
+		_ = batch.Close()
+	}()
 
 	if cInfo != nil {
 		flushCommitInfo(batch, version, cInfo)
@@ -1168,7 +1170,10 @@ func flushCommitInfo(batch dbm.Batch, version int64, cInfo *types.CommitInfo) {
 	}
 
 	cInfoKey := fmt.Sprintf(commitInfoKeyFmt, version)
-	batch.Set([]byte(cInfoKey), bz)
+
+	if err := batch.Set([]byte(cInfoKey), bz); err != nil {
+		panic(err)
+	}
 }
 
 func flushLatestVersion(batch dbm.Batch, version int64) {
@@ -1177,5 +1182,7 @@ func flushLatestVersion(batch dbm.Batch, version int64) {
 		panic(err)
 	}
 
-	batch.Set([]byte(latestVersionKey), bz)
+	if err := batch.Set([]byte(latestVersionKey), bz); err != nil {
+		panic(err)
+	}
 }

store/streaming/constructor.go

@@ -163,7 +163,7 @@ func LoadStreamingServices(
 			// Close any services we may have already spun up before hitting the error
 			// on this one.
 			for _, activeStreamer := range activeStreamers {
-				activeStreamer.Close()
+				_ = activeStreamer.Close()
 			}
 
 			return nil, nil, err
@@ -176,7 +176,7 @@ func LoadStreamingServices(
 			// Close any services we may have already spun up before hitting the error
 			// on this one.
 			for _, activeStreamer := range activeStreamers {
-				activeStreamer.Close()
+				_ = activeStreamer.Close()
 			}
 
 			return nil, nil, err
@@ -186,7 +186,9 @@ func LoadStreamingServices(
 		bApp.SetStreamingService(streamingService)
 
 		// kick off the background streaming service loop
-		streamingService.Stream(wg)
+		if err := streamingService.Stream(wg); err != nil {
+			return nil, nil, err
+		}
 
 		// add to the list of active streamers
 		activeStreamers = append(activeStreamers, streamingService)

store/tracekv/store.go

@@ -195,5 +195,7 @@
 		panic(errors.Wrap(err, "failed to write trace operation"))
 	}
 
-	io.WriteString(w, "\n")
+	if _, err = io.WriteString(w, "\n"); err != nil {
+		panic(errors.Wrap(err, "failed to write newline"))
+	}
 }