How to use subscription with bullmq?

import { Queue, Worker } from "bullmq";

const sendMessage = publicProcedure
  .mutation(async ({ ctx }) => {
    const myQueue = new Queue(`match-message`, { connection:ctx.redis });
    await myQueue.add('test', 'test message');
    return true;
  });


const onMessage = publicProcedure.subscription(async function* ({
  signal,
  input,
  ctx,
}) {

  const worker=new Worker(`match-message`, async (job) => {
    return job.returnvalue as Message
  },{
    connection:ctx.redis
  })
  worker.on('completed', (job) => {
    // yield message
  })
  if(signal?.aborted){
    worker.close()
  }

 
});