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Integrating Otto Wallet API: A Complete Guide

Learn how to seamlessly integrate Otto Wallet's cryptocurrency infrastructure into your application

Alex Johnson

Lead Developer Advocate

May 15, 2023 12 min read

Otto Wallet provides a robust API that allows developers to integrate cryptocurrency functionality into their applications with ease. This comprehensive guide will walk you through the process of implementing the Otto Wallet API, from authentication to advanced features like webhook integration.

Introduction to Otto Wallet API

The Otto Wallet API is a RESTful interface that provides access to Otto's cryptocurrency infrastructure. It enables developers to create wallets, manage transactions, and access blockchain data without having to build these capabilities from scratch.

Key features of the Otto Wallet API include:

  • Multi-currency wallet creation and management
  • Secure transaction processing
  • Real-time blockchain data access
  • Webhook notifications for transaction events
  • Comprehensive security features
Note

Before proceeding with integration, ensure you have an active Otto Wallet developer account. If you don't have one yet, you can sign up at developer.ottowallet.com.

Prerequisites

Before you begin integrating the Otto Wallet API, make sure you have the following:

  • An active Otto Wallet developer account
  • API keys (available in your developer dashboard)
  • Basic understanding of RESTful APIs
  • Familiarity with your programming language of choice
  • HTTPS-enabled environment for secure API calls

API Authentication

All requests to the Otto Wallet API must be authenticated using API keys. The API uses a combination of an API Key and a Secret Key for authentication.

Generating API Keys

To generate API keys:

  1. Log in to your Otto Wallet developer dashboard
  2. Navigate to API Keys section
  3. Click "Generate New API Key"
  4. Store your API Key and Secret Key securely

Authentication Headers

Include the following headers in all API requests:

HTTP Headers
X-API-Key: your_api_key_hereX-API-Signature: generated_signatureX-API-Timestamp: current_unix_timestamp

Generating the Signature

The API signature is a HMAC-SHA256 hash of the request payload, using your Secret Key:

JavaScript
// Example signature generation in JavaScript const crypto = require('crypto'); function generateSignature(payload, secretKey, timestamp) { const message = timestamp + JSON.stringify(payload); return crypto .createHmac('<span class="highlight">sha256</span>', secretKey) .update(message) .digest('<span class="highlight">hex</span>'); } // Usage const payload = { amount: 0.5, currency: 'BTC' }; const timestamp = Math.floor(Date.now() / 1000).toString(); const signature = generateSignature(payload, '<span className="highlight">YOUR_SECRET_KEY</span>', timestamp);

Wallet Creation

Creating a new wallet for your users is one of the first steps in integrating Otto Wallet into your application.

Create a New Wallet

To create a new wallet, send a POST request to the wallet endpoint:

HTTP Request
POST https://api.ottowallet.com/v1/wallets// Request Body "user_id": "user_12345", "wallet_name": "Main Wallet", "currencies": ["BTC", "ETH", "USDC"]

The API will respond with the newly created wallet details:

JSON Response
"wallet_id": "<span className="highlight">wallet_7e9f8d2c5a3b1</span>", "user_id": "user_12345", "wallet_name": "Main Wallet", "created_at": "2023-05-15T10:30:00Z", "addresses": { "BTC": "bc1q9h6mqc7h5jqz4r5rh0hgct6rsjjg4ssj5x9v5w", "ETH": "0x71C7656EC7ab88b098defB751B7401B5f6d8976F", "USDC": "0x71C7656EC7ab88b098defB751B7401B5f6d8976F" }, "status": "active"

Retrieve Wallet Details

To retrieve details of an existing wallet:

HTTP Request
GET https://api.ottowallet.com/v1/wallets/{wallet_id}

Transaction Management

The Otto Wallet API provides comprehensive transaction management capabilities, including sending, receiving, and querying transaction history.

Initiating a Transaction

To initiate a new transaction:

HTTP Request
POST https://api.ottowallet.com/v1/transactions// Request Body "wallet_id": "wallet_7e9f8d2c5a3b1", "to_address": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e", "amount": "0.5", "currency": "ETH", "description": "Payment for services"

The API will respond with the transaction details:

JSON Response
"transaction_id": "<span className="highlight">tx_9c8b7a6d5e4f3</span>", "wallet_id": "wallet_7e9f8d2c5a3b1", "from_address": "0x71C7656EC7ab88b098defB751B7401B5f6d8976F", "to_address": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e", "amount": "0.5", "currency": "ETH", "status": "pending", "created_at": "2023-05-15T14:22:10Z", "description": "Payment for services", "fee": "0.0005", "estimated_confirmation_time": "2023-05-15T14:32:10Z"

Querying Transaction History

To retrieve transaction history for a wallet:

HTTP Request
GET https://api.ottowallet.com/v1/wallets/{wallet_id}/transactions?limit=10&amp;offset=0

Webhook Integration

Webhooks allow your application to receive real-time notifications about events such as incoming transactions or status changes.

Setting Up Webhooks

To configure a webhook endpoint:

HTTP Request
POST https://api.ottowallet.com/v1/webhooks// Request Body "url": "https://your-app.com/webhook/otto", "events": ["transaction.created", "transaction.confirmed", "wallet.created"], "description": "Production webhook endpoint"

Handling Webhook Events

When an event occurs, Otto Wallet will send a POST request to your webhook URL with event data:

JSON Webhook Payload
"event_type": "transaction.confirmed", "event_id": "evt_1a2b3c4d5e", "created_at": "2023-05-15T15:30:45Z", "data": { "transaction_id": "tx_9c8b7a6d5e4f3", "wallet_id": "wallet_7e9f8d2c5a3b1", "status": "confirmed", "confirmations": 6, "block_height": 789456, "block_hash": "0000000000000000000f2adce67c97fda2e1a7d2c4b0dbd8c3b9876543210abc" }

Your webhook endpoint should respond with a 200 OK status code to acknowledge receipt of the event.

Security Tip

Always verify webhook signatures to ensure the requests are coming from Otto Wallet. The signature is included in the X-Otto-Signature header.

Best Practices

Follow these best practices to ensure a secure and reliable integration with Otto Wallet API:

Security Considerations

  • Store API keys securely and never expose them in client-side code
  • Implement proper error handling for all API requests
  • Use HTTPS for all API communications
  • Validate all webhook signatures
  • Implement rate limiting to prevent abuse

Performance Optimization

  • Cache frequently accessed data to reduce API calls
  • Implement retry logic with exponential backoff for failed requests
  • Use batch operations where available to reduce the number of API calls
  • Monitor API usage to stay within rate limits

Conclusion

The Otto Wallet API provides a powerful and flexible way to integrate cryptocurrency functionality into your application. By following this guide, you should now have a solid understanding of how to authenticate with the API, create wallets, manage transactions, and set up webhooks for real-time notifications.

For more detailed information, refer to the official API documentation or contact our developer support team for assistance.

Next Steps

Check out our sample applications on GitHub to see real-world examples of Otto Wallet API integration in different programming languages.

Contents

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