Implement and use MarshalIndentFromJSON

types/utils.go

@@ -14,6 +14,19 @@ var (
 	DBBackend = ""
 )
 
+// MarshalIndentFromJSON returns indented JSON-encoded bytes from already encoded
+// JSON bytes. The output encoding will adhere to the original input's encoding
+// (e.g. Proto3).
+func MarshalIndentFromJSON(bz []byte) ([]byte, error) {
+	var generic interface{}
+
+	if err := json.Unmarshal(bz, &generic); err == nil {
+		return nil, err
+	}
+
+	return json.MarshalIndent(generic, "", "  ")
+}
+
 // SortedJSON takes any JSON and returns it sorted by keys. Also, all white-spaces
 // are removed.
 // This method can be used to canonicalize JSON to be returned by GetSignBytes,