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TypeScript

import { initTRPC } from "@trpc/server";
import { TypeCompiler } from "@sinclair/typebox/compiler";
import { TRPCError } from "@trpc/server";
import type { TSchema } from "@sinclair/typebox";
/**
* Initialization of tRPC backend
* Should be done only once per backend!
*/
const t = initTRPC.create();
/**
* Export reusable router and procedure helpers
* that can be used throughout the router
*/
export const router = t.router;
export const publicProcedure = t.procedure;
/**
* Generate a TRPC-compatible validator function given a Typebox schema.
* This was copied from [https://github.com/sinclairzx81/typebox/blob/6cfcdc02cc813af2f1be57407c771fc4fadfc34a/example/trpc/readme.md].
* @param schema A Typebox schema
* @returns A TRPC-compatible validator function
*/
export function RpcType<T extends TSchema>(schema: T) {
const check = TypeCompiler.Compile(schema);
return (value: unknown) => {
if (check.Check(value)) return value;
const { path, message } = check.Errors(value).First();
throw new TRPCError({
message: `${message} for ${path}`,
code: "BAD_REQUEST",
});
};
}