ethdb/remotedb: fix flawed check in Has/HasAncient

ethdb/remotedb/remotedb.go

@@ -37,10 +37,10 @@ type Database struct {
 
 func (db *Database) Has(key []byte) (bool, error) {
 	if _, err := db.Get(key); err != nil {
-		return true, nil
-	}
 		return false, nil
 	}
+	return true, nil
+}
 
 func (db *Database) Get(key []byte) ([]byte, error) {
 	var resp hexutil.Bytes
@@ -53,10 +53,10 @@ func (db *Database) Get(key []byte) ([]byte, error) {
 
 func (db *Database) HasAncient(kind string, number uint64) (bool, error) {
 	if _, err := db.Ancient(kind, number); err != nil {
-		return true, nil
-	}
 		return false, nil
 	}
+	return true, nil
+}
 
 func (db *Database) Ancient(kind string, number uint64) ([]byte, error) {
 	var resp hexutil.Bytes