WIP

src/model/req.rs

@@ -0,0 +1,7 @@
+use serde::{de, Deserialize, Deserializer};
+
+#[derive(Debug, Deserialize)]
+pub struct Params {
+    #[serde(default, deserialize_with="empty_string_as_none")]
+    transaction_id: Option<i64>,
+}