Add comment about guarantees (paritytech#105)

lamafab · Jan 23, 2019 · 81f446a · 81f446a
1 parent 9cb3613
commit 81f446a
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/parachain/src/wasm_executor.rs b/parachain/src/wasm_executor.rs
@@ -230,6 +230,9 @@ pub fn validate_candidate<E: Externalities>(
 	};
 
 	// allocate call data in memory.
+	// we guarantee that:
+	// - `offset` has alignment at least of 8,
+	// - `len` is not zero.
 	let (offset, len) = {
 		let encoded_call_data = params.encode();