E-Voting Developer 3efdabdbbd fix: Implement vote check endpoint in frontend API proxy

- Created `/frontend/app/api/votes/check/route.ts` to handle GET requests for checking if a user has voted in a specific election.
- Added error handling for unauthorized access and missing election ID.
- Forwarded requests to the backend API and returned appropriate responses.
- Updated `/frontend/app/api/votes/history/route.ts` to fetch user's voting history with error handling.
- Ensured both endpoints utilize the authorization token for secure access.

2025-11-10 02:56:47 +01:00

2.2 KiB

Raw Blame History

Quick Fix Summary - Blockchain Dashboard

🐛 The Problems

1. Console Error: `truncateHash: invalid hash parameter: undefined`

What: Random hash fields showing as undefined
Why: Genesis block and empty vote fields weren't validated
Fix: Added null/undefined checks before truncating

2. POST Error: `{"detail":[{"type":"missing","loc":["query","election_id"]...`

What: Verification button fails with "Field required"
Why: Frontend sends election_id in body, backend expects it in query string

How it failed:

Frontend: POST /api/votes/verify-blockchain { body: {election_id: 1} }
↓
NextJS Proxy: Ignored the body, forgot to add election_id to URL
↓
Backend: POST /api/votes/verify-blockchain?  ← No election_id!
↓
Error: "election_id is required"

✅ What Was Fixed

File 1: `/frontend/app/api/votes/verify-blockchain/route.ts`

+ const body = await request.json()
+ if (body.election_id) {
+   url.searchParams.append('election_id', body.election_id.toString())
+ }

Result: election_id now passed as query parameter to backend

File 2: `/frontend/components/blockchain-viewer.tsx`

  const truncateHash = (hash: string, length: number = 16) => {
+   if (!hash || typeof hash !== "string") {
+     return "N/A"
+   }
    return hash.length > length ? `${hash.slice(0, length)}...` : hash
  }

Result: Graceful handling of undefined/empty hash values

🧪 Test It

Load dashboard: http://localhost:3000/dashboard/blockchain
Select an election → should load without errors
Click verify button → should show verification result
Check console → should have no truncateHash errors

🎯 Root Cause Analysis

Issue	Root Cause	Solution
truncateHash errors	No type validation on hash parameter	Add null/undefined checks
Missing election_id	NextJS proxy didn't forward body to backend	Parse body and add to query params
Field required error	Backend expects query param, frontend sends body	Convert body param to query param in proxy

📚 Documentation

See BLOCKCHAIN_DASHBOARD_FIX.md for detailed analysis and testing procedures.

2.2 KiB Raw Blame History