Adjust staking detection with known type shapes (#7451)

packages/apps-routing/src/democracy.ts

@@ -8,8 +8,8 @@ import type { Route } from './types';
 import Component, { useCounter } from '@polkadot/app-democracy';
 
 function needsApiCheck (api: ApiPromise): boolean {
-  // we need to be able to create an actual vote
   try {
+    // we need to be able to create an actual vote
     api.tx.democracy.vote(1, { Standard: { balance: 1, vote: { aye: true, conviction: 1 } } });
 
     return true;

packages/apps-routing/src/staking.ts

@@ -2,9 +2,33 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import type { TFunction } from 'i18next';
+import type { ApiPromise } from '@polkadot/api';
+import type { PalletStakingExposure } from '@polkadot/types/lookup';
 import type { Route } from './types';
 
 import Component from '@polkadot/app-staking';
+import { unwrapStorageType } from '@polkadot/types/primitive/StorageKey';
+import { assert, BN_ONE } from '@polkadot/util';
+
+const TEST_ADDR = '1ufRSF5gx9Q8hrYoj7KwpzQzDNqLJdbKrFwC6okxa5gtBRd';
+
+function needsApiCheck (api: ApiPromise): boolean {
+  try {
+    // we need a known Exposure type
+    const { others: [{ value, who }], own, total } = api.registry.createType<PalletStakingExposure>(
+      unwrapStorageType(api.registry, api.query.staking.erasStakers.creator.meta.type),
+      { others: [{ value: BN_ONE, who: TEST_ADDR }], own: BN_ONE, total: BN_ONE }
+    );
+
+    assert(total.eq(BN_ONE) && own.eq(BN_ONE) && who.eq(TEST_ADDR) && value.eq(BN_ONE), 'Needs a known Exposure type');
+
+    return true;
+  } catch (error) {
+    console.warn('Unable to create PalletStakingIndividualExposure type, disabling staking route');
+
+    return false;
+  }
+}
 
 export default function create (t: TFunction): Route {
   return {
@@ -12,7 +36,8 @@ export default function create (t: TFunction): Route {
     display: {
       needsApi: [
         ['tx.staking.bond']
-      ]
+      ],
+      needsApiCheck
     },
     group: 'network',
     icon: 'certificate',