fix: lint

Author: ap211unitech

packages/api-derive/src/staking/keys.ts

@@ -68,8 +68,8 @@ export function keysMulti (instanceId: string, api: DeriveApi): (stashIds: (Uint
         switchMap((queuedKeys) =>
           combineLatest([
             of(queuedKeys),
-            api.consts['session']?.['dedupKeyPrefix']
-              ? api.query.session.nextKeys.multi(stashIds.map((s) => [api.consts['session']['dedupKeyPrefix'], s]))
+            api.consts.session?.['dedupKeyPrefix']
+              ? api.query.session.nextKeys.multi(stashIds.map((s) => [api.consts.session['dedupKeyPrefix'], s]))
               : combineLatest(stashIds.map((s) => api.query.session.nextKeys(s)))
           ])
         ),