How to redirect using TRPC?

export const purchaseRouter = createTRPCRouter({
  getUrl: publicProcedure
    .input(z.object({ text: z.string() }))
    .query(async ({ input, ctx }) => {
      const host = ctx.req.headers.host;
      if (!host) {
        throw new Error("No host");
      }
      const session = await stripe.checkout.sessions.create({
        line_items: [
          {
            price: "price_1N7vQ8CxIhQOHpG7clowFgAm",
            quantity: 1,
          },
        ],
        mode: "payment",
        success_url: `https://${host}/?success=true`,
        cancel_url: `https://${host}/?canceled=true`,
      });
      ctx.res.redirect(303, session.url);
    }),
});