Anchor-Kit

Anchor-Kit is a developer-friendly, type-safe SDK for building Stellar Anchors. It abstracts the complexity of Stellar Ecosystem Proposals (SEPs)—specifically SEP-6, SEP-24, and SEP-31—allowing you to focus on your business logic while ensuring compliance and security.

Designed for Bun and TypeScript, Anchor-Kit aims to make Stellar Anchors simple, modular, and "just work."

⚠️ Status: Early Development. Not yet ready for production use.

Features

• 🏗 SEP-24 Out of the Box: Hosted deposit and withdrawal flows with minimal configuration.
• 🔐 SEP-10 Authentication: Built-in Stellar Web Authentication handling.
• 🧩 Modular Architecture: Plugin system for different payment rails (Flutterwave, Paystack, etc.).
• 🛡 Type-Safe: Built with TypeScript for a robust developer experience.
• ⚡ Bun Optimized: Fast runtime performance.

MVP Status

This repository now ships a usable MVP with:

• Express-style router mounting via anchor.getExpressRouter()
• SEP-10 minimal challenge/token flow
• SEP-24 minimal interactive deposit flow
• Webhook endpoint with signature verification + callback hook
• Real SQL persistence (SQLite implemented for local/dev tests, PostgreSQL path supported)
• In-process queue + watcher lifecycle (startBackgroundJobs / stopBackgroundJobs)

The SDK does not own listen() and does not bind network ports.

Install

bun add anchor-kit

Quick Start

import express from 'express';
import { createAnchor } from 'anchor-kit';

const app = express();
app.use(express.json());

const anchor = createAnchor({
  network: { network: 'testnet' },
  server: { interactiveDomain: 'https://anchor.example.com' },
  security: {
    sep10SigningKey: process.env.SEP10_SIGNING_KEY!,
    interactiveJwtSecret: process.env.INTERACTIVE_JWT_SECRET!,
    distributionAccountSecret: process.env.DISTRIBUTION_ACCOUNT_SECRET!,
    webhookSecret: process.env.WEBHOOK_SECRET,
    verifyWebhookSignatures: true,
  },
  assets: {
    assets: [
      {
        code: 'USDC',
        issuer: process.env.USDC_ISSUER!,
        deposits_enabled: true,
      },
    ],
  },
  framework: {
    database: {
      provider: 'postgres',
      url: process.env.DATABASE_URL!,
    },
    queue: {
      backend: 'memory',
      concurrency: 5,
    },
    watchers: {
      enabled: true,
      pollIntervalMs: 15000,
      transactionTimeoutMs: 300000,
    },
  },
  webhooks: {
    onEvent: async (event, ctx) => {
      console.log('webhook event', event.eventId, ctx.receivedAt);
    },
  },
});

await anchor.init();
await anchor.startBackgroundJobs();

app.use('/anchor', anchor.getExpressRouter());

app.listen(3000);

Endpoints

Mounted under your chosen base path (for example /anchor):

• GET /health
• GET /info
• GET /auth/challenge
• POST /auth/token (expects wallet-signed SEP-10 challenge XDR)
• POST /transactions/deposit/interactive (Bearer auth)
• GET /transactions/:id (Bearer auth)
• POST /webhooks/events

Docs

• Architecture Overview
• Contributing Guide
• Roadmap

Contributing

We welcome contributions! Please see our Contributing Guide for details on how to get started.

License

MIT