feat(zink): move storage trait to module storage

examples/mapping.rs

@@ -0,0 +1,3 @@
+//! Mapping example.
+#![cfg_attr(target_arch = "wasm32", no_std)]
+#![cfg_attr(target_arch = "wasm32", no_main)]

zink/src/lib.rs

@@ -3,9 +3,10 @@
 #![no_std]
 
 pub mod ffi;
+mod storage;
 mod traits;
 
-pub use traits::{Event, Storage};
+pub use self::{storage::Storage, traits::Event};
 pub use zink_codegen::{constructor, external, storage, Event};
 
 // Panic hook implementation

zink/src/storage/mod.rs

@@ -0,0 +1,12 @@
+//! Zink storage implementation.
+
+/// Storage trait. Currently not for public use
+pub trait Storage<T> {
+    const STORAGE_KEY: i32;
+
+    /// Get value from storage.
+    fn get() -> T;
+
+    /// Set value to storage.
+    fn set(value: T);
+}

zink/src/traits.rs

@@ -43,14 +43,3 @@ pub trait Event {
         }
     }
 }
-
-/// Storage trait. Currently not for public use
-pub trait Storage<T> {
-    const STORAGE_KEY: i32;
-
-    /// Get value from storage.
-    fn get() -> T;
-
-    /// Set value to storage.
-    fn set(value: T);
-}