Issue while Verifying JWT Token (idToken) on live backend but works on localsystem

Web3Auth Community General
1

We are tying to authenticate the web3auth JWT Token (idToken) generated at frontend on the backend server using jose, we were verifying the same token to authenticate the genuine user and get payload details.

const jwks = jose.createRemoteJWKSet(new URL("https://api-auth.web3auth.io/jwks"));

while working on the localsystem the code snippet worked as expected and generated the write payload details, but when pushing the same code online to servers. the above mentioned code line throws the following error:

Error: Cannot set headers after they are sent to the client
1|backend  |     at new NodeError (node:internal/errors:387:5)
1|backend  |     at ServerResponse.setHeader (node:_http_outgoing:644:11)
1|backend  |     at ServerResponse.header (/home/ubuntu/lighthouse-backend/node_modules/express/lib/response.js:794:10)
1|backend  |     at ServerResponse.send (/home/ubuntu/lighthouse-backend/node_modules/express/lib/response.js:174:12)
1|backend  |     at ServerResponse.json (/home/ubuntu/lighthouse-backend/node_modules/express/lib/response.js:278:15)
1|backend  |     at ServerResponse.send (/home/ubuntu/lighthouse-backend/node_modules/express/lib/response.js:162:21)
1|backend  |     at exports.default (/home/ubuntu/lighthouse-backend/src/middlewares/error-handler.ts:8:19)
1|backend  |     at Layer.handle_error (/home/ubuntu/lighthouse-backend/node_modules/express/lib/router/layer.js:71:5)
1|backend  |     at trim_prefix (/home/ubuntu/lighthouse-backend/node_modules/express/lib/router/index.js:326:13)
1|backend  |     at /home/ubuntu/lighthouse-backend/node_modules/express/lib/router/index.js:286:9

Please suggest , How this can be fixed ?

2

@arpit Thanks for your recent post.

Which SDK are you using? Please choose the correct category when creating the post for clarity.

3

@arpit This type of error occurs when you pass statements after sending a response.

For example:

res.send("something response");
console.log("jhgfjhgsdhgfsdf");
console.log("sdgsdfhdgfdhgsdf");
res.send("sopmething response");

Can you check your code accordingly? As it will result in the error you are seeing, because once the response has been sent, the following res.send will not be executed.