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<input type="hidden" name="project[files][README.md]" value="# Counter (Serverless) for RivetKit

Example project demonstrating serverless actor deployment with automatic engine configuration using [RivetKit](https://rivetkit.org).

[Learn More →](https://github.com/rivet-dev/rivetkit)

[Discord](https://rivet.dev/discord) — [Documentation](https://rivetkit.org) — [Issues](https://github.com/rivet-dev/rivetkit/issues)

## Getting Started

### Prerequisites

- Node.js
- RIVET_TOKEN environment variable (for serverless configuration)

### Installation

```sh
git clone https://github.com/rivet-dev/rivetkit
cd rivetkit/examples/counter-serverless
npm install
```

### Development

Set your Rivet token and run the development server:

```sh
export RIVET_TOKEN=your-token-here
npm run dev
```

Run the connect script to interact with the counter:

```sh
tsx scripts/connect.ts
```

## License

Apache 2.0">
<input type="hidden" name="project[files][package.json]" value="{&quot;name&quot;:&quot;example-counter-serverless&quot;,&quot;version&quot;:&quot;2.0.20&quot;,&quot;private&quot;:true,&quot;type&quot;:&quot;module&quot;,&quot;scripts&quot;:{&quot;dev&quot;:&quot;tsx src/server.ts&quot;,&quot;check-types&quot;:&quot;tsc --noEmit&quot;,&quot;connect&quot;:&quot;tsx scripts/connect.ts&quot;,&quot;test&quot;:&quot;vitest run&quot;},&quot;devDependencies&quot;:{&quot;rivetkit&quot;:&quot;https://pkg.pr.new/rivet-dev/rivetkit/rivetkit@54999214372f9ecb3f4251a3be45c7a0eb8dfacf&quot;,&quot;@types/node&quot;:&quot;^22.13.9&quot;,&quot;tsx&quot;:&quot;^3.12.7&quot;,&quot;typescript&quot;:&quot;^5.7.3&quot;,&quot;vitest&quot;:&quot;^3.1.1&quot;},&quot;stableVersion&quot;:&quot;0.8.0&quot;}">
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  &quot;compilerOptions&quot;: {
    /* Visit https://aka.ms/tsconfig.json to read more about this file */

    /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    &quot;target&quot;: &quot;esnext&quot;,
    /* Specify a set of bundled library declaration files that describe the target runtime environment. */
    &quot;lib&quot;: [&quot;esnext&quot;],
    /* Specify what JSX code is generated. */
    &quot;jsx&quot;: &quot;react-jsx&quot;,

    /* Specify what module code is generated. */
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    &quot;checkJs&quot;: false,

    /* Disable emitting files from a compilation. */
    &quot;noEmit&quot;: true,

    /* Ensure that each file can be safely transpiled without relying on other imports. */
    &quot;isolatedModules&quot;: true,
    /* Allow &#39;import x from y&#39; when a module doesn&#39;t have a default export. */
    &quot;allowSyntheticDefaultImports&quot;: true,
    /* Ensure that casing is correct in imports. */
    &quot;forceConsistentCasingInFileNames&quot;: true,

    /* Enable all strict type-checking options. */
    &quot;strict&quot;: true,

    /* Skip type checking all .d.ts files. */
    &quot;skipLibCheck&quot;: true
  },
  &quot;include&quot;: [&quot;src/**/*.ts&quot;, &quot;scripts/**/*.ts&quot;, &quot;tests/**/*.ts&quot;]
}
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">
<input type="hidden" name="project[files][scripts/connect.ts]" value="import { createClient } from &quot;rivetkit/client&quot;;
import type { Registry } from &quot;../src/registry&quot;;

async function main() {
	const client = createClient&lt;Registry&gt;(&quot;http://localhost:6420&quot;);

	const counter = client.counter.getOrCreate();

	// counter.on(&quot;newCount&quot;, (count: number) =&gt; console.log(&quot;Event:&quot;, count));

	for (let i = 0; i &lt; 5; i++) {
		const out = await counter.increment(5);
		console.log(&quot;RPC:&quot;, out);

		await new Promise((resolve) =&gt; setTimeout(resolve, 1000));
	}

	await new Promise((resolve) =&gt; setTimeout(resolve, 10000));
	// await counter.dispose();
}

main();
">
<input type="hidden" name="project[files][src/registry.ts]" value="import { actor, setup } from &quot;rivetkit&quot;;

const counter = actor({
	state: {
		count: 0,
	},
	actions: {
		increment: (c, x: number) =&gt; {
			c.state.count += x;
			c.broadcast(&quot;newCount&quot;, c.state.count);
			return c.state.count;
		},
		getCount: (c) =&gt; {
			return c.state.count;
		},
	},
});

export const registry = setup({
	use: { counter },
});

export type Registry = typeof registry;
">
<input type="hidden" name="project[files][src/server.ts]" value="import { registry } from &quot;./registry&quot;;

registry.start({
	runnerKind: &quot;serverless&quot;,
	autoConfigureServerless: { url: &quot;http://localhost:8080&quot; },
});
">
<input type="hidden" name="project[files][tests/counter.test.ts]" value="import { setupTest } from &quot;rivetkit/test&quot;;
import { expect, test } from &quot;vitest&quot;;
import { registry } from &quot;../src/registry&quot;;

test(&quot;it should count&quot;, async (test) =&gt; {
	const { client } = await setupTest(test, registry);
	const counter = client.counter.getOrCreate().connect();

	// Test initial count
	expect(await counter.getCount()).toBe(0);

	// Test event emission
	let eventCount = -1;
	counter.on(&quot;newCount&quot;, (count: number) =&gt; {
		eventCount = count;
	});

	// Test increment
	const incrementAmount = 5;
	const result = await counter.increment(incrementAmount);
	expect(result).toBe(incrementAmount);

	// Verify event was emitted with correct count
	expect(eventCount).toBe(incrementAmount);

	// Test multiple increments
	for (let i = 1; i &lt;= 3; i++) {
		const newCount = await counter.increment(incrementAmount);
		expect(newCount).toBe(incrementAmount * (i + 1));
		expect(eventCount).toBe(incrementAmount * (i + 1));
	}

	// Verify final count
	expect(await counter.getCount()).toBe(incrementAmount * 4);
});
">
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<input type="hidden" name="project[title]" value="example-counter-serverless">
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