cal/packages/trpc/server/trpc.ts

import superjson from "superjson";

import { initTRPC, TRPCError } from "@trpc/server";

import { Context } from "./createContext";

export const t = initTRPC.context<Context>().create({
  transformer: superjson,
});

const perfMiddleware = t.middleware(async ({ path, type, next }) => {
  performance.mark("Start");
  const result = await next();
  performance.mark("End");
  performance.measure(`[${result.ok ? "OK" : "ERROR"}][$1] ${type} '${path}'`, "Start", "End");
  return result;
});

const isAuthedMiddleware = t.middleware(({ ctx, next }) => {
  if (!ctx.user || !ctx.session) {
    throw new TRPCError({ code: "UNAUTHORIZED" });
  }
  return next({
    ctx: {
      // infers that `user` and `session` are non-nullable to downstream procedures
      session: ctx.session,
      user: ctx.user,
    },
  });
});

export const publicProcedure = t.procedure.use(perfMiddleware);
export const authedProcedure = t.procedure.use(perfMiddleware).use(isAuthedMiddleware);