add

util/base64.go

@@ -0,0 +1,20 @@
+package util
+
+import "encoding/base64"
+
+// Function to return decoded bytes if a string is Base64 encoded
+func StrOrBase64Encoded(str string) string {
+	decoded, err := base64.StdEncoding.DecodeString(str)
+	if err == nil {
+		return string(decoded)
+	}
+	return str
+}
+
+func B64StrToByte(str string) ([]byte, error) {
+	return base64.StdEncoding.DecodeString(str)
+}
+
+func ByteToB64Str(b []byte) string {
+	return base64.StdEncoding.EncodeToString(b)
+}