JavaScript/TypeScript

Complete JavaScript and TypeScript examples for integrating with NextBlock's gRPC API using @grpc/grpc-js and @solana/web3.js.

Overview

These examples demonstrate how to:

• Establish secure gRPC connections with authentication

• Submit single and batched transactions with proper tipping

• Stream real-time tip floor data for dynamic tip optimization

• Maintain persistent connections with keepalive mechanisms

Prerequisites

Install the required dependencies:

npm install @grpc/grpc-js @grpc/proto-loader
npm install @solana/web3.js @solana/spl-token
npm install typescript @types/node  # For TypeScript support

# Generate JavaScript gRPC client from nextblock-proto
# See https://github.com/nextblock-ag/nextblock-proto for instructions

Examples

Core Examples

• Connection - Establish gRPC connections with authentication

• Submit Single Transaction - Send individual transactions with tips

• Submit Batched Transactions - Send atomic transaction bundles

• Tip Floor Stream - Stream real-time tip floor data

• Keepalive - Maintain persistent connections

Quick Start

1. Generate gRPC client from nextblock-proto

2. Install dependencies using npm/yarn

3. Set up environment with API key and endpoint

4. Start with connection example to establish authenticated gRPC connection

5. Use tip floor streaming to optimize transaction tips dynamically

6. Submit transactions using single or batched submission methods

Key Features

TypeScript Support

All examples include full TypeScript type definitions for better development experience.

Modern JavaScript

Uses modern ES6+ features including async/await, destructuring, and modules.

Error Handling

Comprehensive error handling with retry logic and exponential backoff.

Connection Management

Persistent connections with keepalive, health monitoring, and automatic recovery.

Dynamic Tipping

Real-time tip optimization based on current network conditions from tip floor API.

Best Practices

1. Use TypeScript - Leverage type safety for better code quality

2. Enable TLS - Always use secure connections in production

3. Implement keepalive - Maintain persistent connections for better performance

4. Monitor tip floors - Use streaming API for dynamic tip adjustment

5. Handle errors gracefully - Implement proper retry logic with exponential backoff

6. Use environment variables - Store sensitive configuration securely

7. Choose appropriate endpoints - Use the closest endpoint for better latency

8. Bundle transactions - Use batched submissions for atomic operations