GST Verification Setup Instructions

Problem Identified ✅

The GST credentials you provided are NOT in the .env file. The environment variables are undefined when the app runs.

Solution

You need to add the following lines to your .env file:

# GST Verification (Setu)
GST_PROVIDER_URL=https://dg-sandbox.setu.co/api/verify/gst
GST_CLIENT_ID=292c6e76-dabf-49c4-8e48-90fba2916673
GST_CLIENT_SECRET=7IZMe9zvoBBuBukLiCP7n4KLwSOy11oP
GST_PRODUCT_INSTANCE_ID=69e23f7f-4f71-412e-aec6-b1da3fb77c6f

Steps to Fix

Open your .env file (it's in the root of your project)
Add the GST credentials (copy the lines above)
Restart your server:
- Stop the current server (Ctrl+C in terminal)
- Run npm run dev again
Test the endpoint with this curl command:

PowerShell (Windows):

Invoke-WebRequest -Uri "http://localhost:3000/v1/gst/verify/27AAACM1234A1Z5" -Headers @{"x-api-key"="vf_test_369afc881da118c02ade27d323aaf3c186945edce6bcdf02"} -Method GET | Select-Object -ExpandProperty Content

Bash/CMD (if you have curl.exe):

curl -X GET http://localhost:3000/v1/gst/verify/27AAACM1234A1Z5 -H "x-api-key: vf_test_369afc881da118c02ade27d323aaf3c186945edce6bcdf02"

What I Fixed

✅ Applied the same fix that worked for PAN verification:
- Created fresh axios instance to avoid global defaults pollution
- Clean credentials by trimming whitespace
- Added detailed debug logging
- Enhanced error handling for auth failures
✅ The code is ready - it just needs the credentials in .env

After Adding Credentials

Once you add the credentials to .env and restart, you should see:

Debug logs in terminal:

[GST Service] Sending request to provider: {
  url: 'https://dg-sandbox.setu.co/api/verify/gst',
  'x-client-id': '292c6e76-dabf-49c4-8e48-90fba2916673',
  'x-client-secret': '****11oP',
  'x-product-instance-id': '69e23f7f-4f71-412e-aec6-b1da3fb77c6f',
  requestBody: { gstin: '27AAACM1234A1Z5' }
}

Note: If you still get authentication errors after adding to .env, it means the Setu sandbox credentials themselves are invalid or expired. You'll need to verify them with Setu.

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