[Add] Structure

src/models/ids.rs

@@ -0,0 +1,30 @@
+use std::fmt::{Display, Formatter};
+
+macro_rules! id_type {
+    ($name:ident) => {
+        #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq, serde::Serialize)]
+        pub struct $name(pub i64);
+
+        impl From<i64> for $name {
+            fn from(value: i64) -> Self {
+                Self(value)
+            }
+        }
+
+        impl From<$name> for i64 {
+            fn from(value: $name) -> Self {
+                value.0
+            }
+        }
+
+        impl Display for $name {
+            fn fmt(&self, formatter: &mut Formatter<'_>) -> std::fmt::Result {
+                self.0.fmt(formatter)
+            }
+        }
+    };
+}
+
+id_type!(UserId);
+id_type!(IotaId);
+id_type!(OmikronId);