Use ‘#[module]’ and implement session for Kusama

src/runtimes.rs

@@ -31,6 +31,7 @@ use crate::frame::{
         Balances,
     },
     contracts::Contracts,
+    session::Session,
     system::System,
 };
 
@@ -82,6 +83,11 @@ impl System for KusamaRuntime {
     type AccountData = AccountData<<Self as Balances>::Balance>;
 }
 
+impl Session for KusamaRuntime {
+    type SessionIndex = u32;
+    type ValidatorId = <Self as System>::AccountId;
+}
+
 impl Balances for KusamaRuntime {
     type Balance = u128;
 }