The Database That Lives On-Chain

# Install OnChainDB SDK
$ npm install @onchaindb/sdk

import { createClient } from '@onchaindb/sdk';

// Initialize client
const client = createClient({
  endpoint: 'https://api.onchaindb.io',
  appKey: 'your-app-key',
  appId: 'your-app-id'
});

// Create index for fast queries
const db = client.database('your-app-id');
await db.createIndex({
  name: 'idx_todos_owner',
  collection: 'todos',
  field_name: 'owner',
  index_type: 'hash'
});

// Store data with x402 payment
const result = await client.store(
  { collection: 'todos', data: [{ title: 'Buy groceries', owner: 'celestia1...' }] },
  paymentCallback
);

// Query - Method (simple)
const todos = await client.query({ collection: 'todos', limit: 10 });

// Query - Helper (advanced)
const filtered = await client.queryBuilder()
  .collection('todos').whereField('owner').equals('celestia1...').execute();