ethdb/pebble: handle error in pebble module

ethdb/pebble/pebble.go

@@ -293,7 +293,9 @@ func (d *Database) Has(key []byte) (bool, error) {
 	} else if err != nil {
 		return false, err
 	}
-	closer.Close()
+	if err = closer.Close(); err != nil {
+		return false, err
+	}
 	return true, nil
 }
 
@@ -310,7 +312,9 @@ func (d *Database) Get(key []byte) ([]byte, error) {
 	}
 	ret := make([]byte, len(dat))
 	copy(ret, dat)
-	closer.Close()
+	if err = closer.Close(); err != nil {
+		return nil, err
+	}
 	return ret, nil
 }
 
@@ -519,14 +523,18 @@ type batch struct {
 
 // Put inserts the given value into the batch for later committing.
 func (b *batch) Put(key, value []byte) error {
-	b.b.Set(key, value, nil)
+	if err := b.b.Set(key, value, nil); err != nil {
+		return err
+	}
 	b.size += len(key) + len(value)
 	return nil
 }
 
 // Delete inserts the key removal into the batch for later committing.
 func (b *batch) Delete(key []byte) error {
-	b.b.Delete(key, nil)
+	if err := b.b.Delete(key, nil); err != nil {
+		return err
+	}
 	b.size += len(key)
 	return nil
 }
@@ -558,19 +566,22 @@ func (b *batch) Replay(w ethdb.KeyValueWriter) error {
 	for {
 		kind, k, v, ok, err := reader.Next()
 		if !ok || err != nil {
-			break
+			return err
 		}
 		// The (k,v) slices might be overwritten if the batch is reset/reused,
 		// and the receiver should copy them if they are to be retained long-term.
 		if kind == pebble.InternalKeyKindSet {
-			w.Put(k, v)
+			if err = w.Put(k, v); err != nil {
+				return err
+			}
 		} else if kind == pebble.InternalKeyKindDelete {
-			w.Delete(k)
+			if err = w.Delete(k); err != nil {
+				return err
+			}
 		} else {
 			return fmt.Errorf("unhandled operation, keytype: %v", kind)
 		}
 	}
-	return nil
 }
 
 // pebbleIterator is a wrapper of underlying iterator in storage engine.