@trpc-rate-limiter/cloudflare

This package includes WorkersKV and Durable Object store for the @trpc-rate-limiter.

Installation

# Using npm/yarn/pnpm/bun
npm add @trpc-rate-limiter/cloudflare

Usage

Examples

Using WorkersKVStore

# wrangler.toml
[[kv_namespaces]]
binding = "CACHE"
id = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

For more info on setting up your WorkersKV you can check out Get Started Guide on cloudflare.

// index.ts
import { WorkersKVStore } from "@trpc-rate-limiter/cloudflare";
import { trpcRateLimiter } from "@trpc-rate-limiter/hono";
import { KVNamespace } from "cloudflare:worker";

// Add this in Hono app
type Bindings = {
  CACHE: KVNamespace;
  // ... other binding types
};

const app = new Hono<{ Bindings: Bindings }>();

const t = initTRPC.context<TRPCContext>().create();

// Apply the rate limiter to the tRPC middleware
const rateLimiterMiddleware = t.middleware(async ({ ctx, next }) => {
  const { c } = ctx;

  await trpcRateLimiter<AppRouter>({
    config: {
      "auth.signIn": {
        windowMs: 5 * 60 * 1000,
        limit: 5,
      },
      default: { windowMs: 60 * 1000, limit: 5 },
    },
    store: new WorkersKVStore({ namespace: c.env.CACHE }), // Here CACHE is your WorkersKV Binding.
  })(c);

  return next();
});

Using DurableObjectStore

# wrangler.toml
[[durable_objects.bindings]]
name = "CACHE"
class_name = "DurableObjectRateLimiter"

[[migrations]]
tag = "v1" # Should be unique for each entry
new_classes = ["DurableObjectRateLimiter"]

For more info on setting up your Durable Objects you can check out Get Started Guide on cloudflare.

// index.ts
import { DurableObjectStore, DurableObjectRateLimiter } from "@trpc-rate-limiter/cloudflare";
import { trpcRateLimiter } from "@trpc-rate-limiter/hono";
import { Context, Next } from "hono";
import { DurableObjectNamespace } from "cloudflare:worker";

// Add this in Hono app
type Bindings = {
  CACHE: DurableObjectNamespace<DurableObjectRateLimiter>;
  // ... other binding types
};

const app = new Hono<{ Bindings: Bindings }>();

const t = initTRPC.context<TRPCContext>().create();

// Apply the rate limiter to the tRPC middleware
const rateLimiterMiddleware = t.middleware(async ({ ctx, next }) => {
  const { c } = ctx;

  await trpcRateLimiter<AppRouter>({
    config: {
      "auth.signIn": {
        windowMs: 5 * 60 * 1000,
        limit: 5,
      },
      default: { windowMs: 60 * 1000, limit: 5 },
    },
    store: new DurableObjectStore({ namespace: c.env.CACHE }), // Here CACHE is your Durable Object Binding.
  })(c);

  return next();
});

// Export DurableObjectRateLimiter in the index file of your Worker
export { DurableObjectRateLimiter };

export default app;

Configuration Props of WorkersKVStore and DurableObjectStore

namespace

The KV / Durable Object namespace to use. The value you set for <BINDING_NAME> will be used to reference this database / durable object in your Worker.

prefix

The text to prepend to the key in the KV / Durable Object namespace.

Defaults to hrl:.

Credits

The @trpc-rate-limiter/cloudflare is based on the @hono-rate-limiter/cloudflare store.