Big refactor.

substrate/wasm-runtime/polkadot/src/storage.rs

@@ -0,0 +1,23 @@
+use slicable::Slicable;
+use endiansensitive::EndianSensitive;
+use runtime_support;
+
+pub trait Storage {
+	fn storage_into(key: &[u8]) -> Self;
+	fn store(&self, key: &[u8]);
+}
+
+impl<T: Default + Sized + EndianSensitive> Storage for T {
+	fn storage_into(key: &[u8]) -> Self {
+		Slicable::set_as_slice(|out| runtime_support::read_storage(key, out) == out.len())
+			.unwrap_or_else(Default::default)
+	}
+
+	fn store(&self, key: &[u8]) {
+		self.as_slice_then(|slice| runtime_support::set_storage(key, slice));
+	}
+}
+
+pub fn storage_into<T: Storage>(key: &[u8]) -> T {
+	T::storage_into(key)
+}