Fix derive session.info with no staking

2021-01-13 23:59:59 +01:00
parent 9dc683d289
commit c632030437
1 changed files with 4 additions and 1 deletions
@@ -50,7 +50,10 @@ function queryBabe (api: ApiInterfaceRx): Observable<DeriveSessionInfo> {
        [
          true,
          api.consts.babe.epochDuration,
-          api.consts.staking.sessionsPerEra
+          // we may have babe without staking (only epoch)
+          api.consts.staking
+            ? api.consts.staking.sessionsPerEra
+            : api.registry.createType('SessionIndex')
        ],
        indexes
      ])