kv-connect-kit

Minimal Typescript client implementing the KV Connect protocol. Access Deno KV remotely from any Javascript environment like Node, Cloudflare Workers, Bun, Deno, or the browser.

• Use makeRemoteService to provide your access token and configure optional setup params
• Use the returned service to call openKv (equiv to Deno.openKv) and newKvU64 (equiv to new Deno.KvU64)
• The KV instance returned can be interacted with via the standard KV api in any Javascript environment.

Quick start - Deno

import { makeRemoteService } from 'https://raw.githubusercontent.com/skymethod/kv-connect-kit/v0.0.5/src/remote.ts';

const accessToken = Deno.env.get('DENO_KV_ACCESS_TOKEN');
if (accessToken === undefined) throw new Error(`Set your personal access token: https://dash.deno.com/account#access-tokens`);

// make a local openKv function, optionally wrap unsupported serialized byte values as UnknownV8
const { openKv } = makeRemoteService({ accessToken, wrapUnknownValues: true });

// open the database connection, use the url from project dashboard: https://dash.deno.com/projects/YOUR_PROJECT/kv
const kv = await openKv('https://api.deno.com/databases/YOUR_DATABASE_ID/connect');

// do anything using the kv api: https://deno.land/api?s=Deno.Kv&unstable
const result = await kv.set([ 'from-client' ], 'hello!');
console.log(result);

// close the database connection
kv.close();

Quick start - Bun

Use the NPM package 👉 bun install kv-connect-kit

import { makeRemoteService } from 'kv-connect-kit';

const accessToken = Bun.env['DENO_KV_ACCESS_TOKEN'];
if (accessToken === undefined) throw new Error(`Set your personal access token: https://dash.deno.com/account#access-tokens`);

// make a local openKv function, optionally wrap unsupported serialized byte values as UnknownV8
const { openKv } = makeRemoteService({ accessToken, wrapUnknownValues: true });

// open the database connection, use the url from project dashboard: https://dash.deno.com/projects/YOUR_PROJECT/kv
const kv = await openKv('https://api.deno.com/databases/YOUR_DATABASE_ID/connect');

// do anything using the kv api: https://deno.land/api?s=Deno.Kv&unstable
const result = await kv.set([ 'from-client' ], 'hello!');
console.log(result);

// close the database connection
kv.close();

Quick start - Node 18+

Use the NPM package 👉 npm install kv-connect-kit

import { makeRemoteService } from 'kv-connect-kit';
import { serialize, deserialize } from 'v8';

const accessToken = process.env['DENO_KV_ACCESS_TOKEN'];
if (accessToken === undefined) throw new Error(`Set your personal access token: https://dash.deno.com/account#access-tokens`);

// make a local openKv function, on Node 18+ optionally pass full-fidelity V8 serializers to support all KV values
const { openKv } = makeRemoteService({ accessToken, encodeV8: serialize, decodeV8: deserialize });

// open the database connection, use the url from project dashboard: https://dash.deno.com/projects/YOUR_PROJECT/kv
const kv = await openKv('https://api.deno.com/databases/YOUR_DATABASE_ID/connect');

// do anything using the kv api: https://deno.land/api?s=Deno.Kv&unstable
const result = await kv.set([ 'from-client' ], 'hello!');
console.log(result);

// close the database connection
kv.close();

Quick start - Node 14

Use the NPM package 👉 npm install kv-connect-kit node-fetch

import { makeRemoteService } from 'kv-connect-kit'; // or: require('kv-connect-kit')
import fetch from 'node-fetch';

const accessToken = process.env['DENO_KV_ACCESS_TOKEN'];
if (accessToken === undefined) throw new Error(`Set your personal access token: https://dash.deno.com/account#access-tokens`);

// make a local openKv function, Node 14 does not provide a global `fetch` function, so pass a custom implementation like node-fetch
const { openKv } = makeRemoteService({ accessToken, fetcher: fetch });

// open the database connection, use the url from project dashboard: https://dash.deno.com/projects/YOUR_PROJECT/kv
const kv = await openKv('https://api.deno.com/databases/YOUR_DATABASE_ID/connect');

// do anything using the kv api: https://deno.land/api?s=Deno.Kv&unstable
const result = await kv.set([ 'from-client' ], 'hello!');
console.log(result);

// close the database connection
kv.close();

Credits

• Protobuf code generated with pb
• NPM package generated with dnt

---

Options to makeRemoteService

export interface RemoteServiceOptions {
    /** Access token used to authenticate to the remote service */
    readonly accessToken: string;

    /** Wrap unsupported V8 payloads to instances of UnknownV8 instead of failing.
     * 
     * Only applicable when using the default serializer. */
    readonly wrapUnknownValues?: boolean;

    /** Enable some console logging */
    readonly debug?: boolean;

    /** Custom serializer to use when serializing v8-encoded KV values.
     * 
     * When you are running on Node 18+, pass the 'serialize' function in Node's 'v8' module. */
    readonly encodeV8?: EncodeV8;

    /** Custom deserializer to use when deserializing v8-encoded KV values.
     * 
     * When you are running on Node 18+, pass the 'deserialize' function in Node's 'v8' module. */
    readonly decodeV8?: DecodeV8;

    /** Custom fetcher to use for the underlying http calls.
     * 
     * Defaults to global 'fetch'`
     */
    readonly fetcher?: Fetcher;

    /** Max number of times to attempt to retry certain fetch errors (like 5xx) */
    readonly maxRetries?: number;

    /** Limit to specific KV Connect protocol versions */
    readonly supportedVersions?: KvConnectProtocolVersion[];
}

A note about V8 serialization

All KVKey types are fully supported, as they don't use V8 serialization.

Deno KV values support any structured-serializable JavaScript values, using V8's internal serializer. This makes client interaction from pure Javascript environment without access to V8 internals... tricky.

A default V8 serializer is included that supports a limited subset of values (see below), but can optionally treat the values as opaque bytes using the wrapUnknownValues option. This is often good enough for listing/migrating/logic that behaves on keys only.

We may be able to leverage denoland/v8_valueserializer for a WASM implementation of V8's serializer in the future!

KV value types supported by the default serializer:

Type	Supported
null	✅
undefined	✅
true/false	✅
Uint8Array	✅
string	✅

PRs to v8.ts welcome - this would benefit everyone using this library!

If you have access to the V8 serializer on your runtime (like the serialize/deserialize in Node's v8 module), you can pass it into the encodeV8 and decodeV8 options to get full value support. Note you must be using the version that the Deno KV service uses, so this works on Node 18+ only.