@davstack/fn-trpc

tRPC adapter for @davstack/fn. Turn a directly-callable fn into a tRPC procedure.

@davstack/fn is a transport-agnostic server-function convention. This package provides initProcedureFactory, which bridges an fn into a tRPC query or mutation procedure while preserving the input/output types.

Install

npm install @davstack/fn-trpc @davstack/fn @trpc/server zod

Usage

import { initTRPC } from '@trpc/server';
import { createFn } from '@davstack/fn';
import { initProcedureFactory } from '@davstack/fn-trpc';
import { z } from 'zod';

const t = initTRPC.create();

// Build a factory bound to your base procedure
const fnProcedure = initProcedureFactory(t.procedure);

// Define a transport-agnostic fn
const createChat = createFn({
	name: 'createChat',
	inputSchema: z.object({ title: z.string() }),
	handler: async ({ input }) => {
		return { id: 'chat_123', title: input.title };
	},
});

// Turn it into a tRPC procedure
const createChatProcedure = fnProcedure(createChat, 'mutation');

// Use it in a router
const appRouter = t.router({
	createChat: createChatProcedure,
});

Pass 'query' instead of 'mutation' to produce a query procedure.