From 894c2f90dd6283875e779f1c336e2bad98d18c06 Mon Sep 17 00:00:00 2001
From: Tarik Gul <47201679+TarikGul@users.noreply.github.com>
Date: Sat, 22 Feb 2025 05:30:59 -0800
Subject: [PATCH] Fix TracksInfo values being undefined and causing a
 whitescreen (#11320)

* Fix TracksInfo values being undefined and causing a whitescreen

* lint
---
 packages/page-referenda/src/useTracks.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/page-referenda/src/useTracks.ts b/packages/page-referenda/src/useTracks.ts
index b43d15a588..af50fda784 100644
--- a/packages/page-referenda/src/useTracks.ts
+++ b/packages/page-referenda/src/useTracks.ts
@@ -8,12 +8,15 @@ import type { PalletReferenda, TrackDescription } from './types.js';
 import { useMemo } from 'react';
 
 import { createNamedHook, useApi } from '@polkadot/react-hooks';
+import { BN_ZERO } from '@polkadot/util';
 
 import { calcCurves } from './util.js';
 
+const zeroGraph = { approval: [BN_ZERO], support: [BN_ZERO], x: [BN_ZERO] };
+
 function expandTracks (tracks: [BN, PalletReferendaTrackInfo][]): TrackDescription[] {
   return tracks.map(([id, info]) => ({
-    graph: calcCurves(info),
+    graph: info.decisionDeposit && info.minApproval && info.minSupport ? calcCurves(info) : zeroGraph,
     id,
     info
   }));