RewardDestination: None types (#3231)

packages/types/src/interfaces/staking/definitions.ts

@@ -172,7 +172,8 @@ export default {
         Staked: 'Null',
         Stash: 'Null',
         Controller: 'Null',
-        Account: 'AccountId'
+        Account: 'AccountId',
+        None: 'Null'
       }
     },
     RewardPoint: 'u32',

packages/types/src/interfaces/staking/types.ts

@@ -193,6 +193,7 @@ export interface RewardDestination extends Enum {
   readonly isController: boolean;
   readonly isAccount: boolean;
   readonly asAccount: AccountId;
+  readonly isNone: boolean;
 }
 
 /** @name RewardPoint */