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OnDB stores JSON documents with verifiable storage and automatic payment handling.

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How It Works

The SDK automatically handles payment responses internally. When you pass a payment callback as the second parameter to store(), the SDK:
  1. Attempts the store operation
  2. If the server requires payment, the SDK invokes your callback with the payment quote
  3. Your callback executes the payment and returns the result
  4. The SDK automatically retries the store operation with the payment proof
You do NOT need to catch payment errors or make a second API call - the SDK handles the entire flow.

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Store with Payment Callback

// Store with payment callback
const result = await client.store(
  {
    collection: 'posts',
    data: [{
      title: 'My First Post',
      content: 'Stored on blockchain!',
      author: 'alice'
    }]
  },
  // Payment callback - SDK invokes this when server requires payment
  async (quote) => {
    const txHash = await processPayment(quote);

    return {
      txHash,
      network: quote.network,
      sender: walletAddress,
      chainType: quote.chainType,
      paymentMethod: 'native'
    };
  },
  true // waitForConfirmation
);

// SDK automatically retried with payment proof - result contains confirmed data
console.log(`Confirmed at block ${result.block_height}`);

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Wait for Confirmation

The waitForConfirmation option ensures data is confirmed on-chain before returning: 
// Without confirmation (returns immediately with ticket)
const quick = await client.store(
  { collection: 'products', data: products },
  paymentCallback,
  false  // Returns immediately
);

console.log('Task ticket:', quick.ticket_id);

// Check status later
const status = await client.getTaskStatus(quick.ticket_id);
console.log('Status:', status.status);

// With confirmation (waits for blockchain)
const confirmed = await client.store(
  { collection: 'products', data: products },
  paymentCallback,
  true  // Waits for on-chain confirmation
);

console.log('Data confirmed at height:', confirmed.block_height);

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Payment Methods

OnDB supports multiple payment methods: 
await client.store(
  { collection: 'data', data: [{ content: 'example' }] },
  async (quote) => {
    const txHash = await processPayment(quote);
    return { txHash, network: quote.network, sender: walletAddress, chainType: quote.chainType, paymentMethod: 'native' };
  },
  true
);

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Method 2: Auto-Pay (Agent Key)

// With an Agent Key, payment is automatic -- no callback needed
const agent = createClient({
  endpoint: 'https://api.ondb.io',
  appId: 'my_agent_app',
  agentKey: 'app_a3f9...'  // Key must have Pay permission
});

await agent.store({
  collection: 'target_app::data',
  data: [{ content: 'example' }]
});

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Method 3: Pre-paid via Callback

const paymentTxHash = 'ABC123...'; // Already paid

await client.store(
  { collection: 'data', data: [{ content: 'example' }] },
  async (quote) => ({
    txHash: paymentTxHash,
    network: quote.network,
    sender: walletAddress,
    chainType: quote.chainType,
    paymentMethod: 'native'
  }),
  true
);

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Storage Model

OnDB uses an append-only storage model. See Immutability for details on how creates, updates, and deletes work under the hood, as well as data retention policies.

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Next Steps

Payment Flows

Deep dive into payment options

Query Builder

Query your stored data