Solana TPU Transaction Sender Server

Overview

A Rust-based Axum web server for submitting Solana transactions using a TPU (Transaction Processing Unit) client with advanced retry mechanisms.

Architecture

• Server: Rust (Axum)
• Client: TypeScript
• Networking: QUIC
• Transaction Handling: Configurable retry strategy

Features

• HTTP endpoints for transaction submission
• Single and batch transaction support
• Comprehensive error handling
• Detailed transaction processing logs
• Configurable retry mechanism

Endpoints

• GET /: Server time
• POST /send_txn: Single transaction submission
• POST /send_batch: Batch transaction submission

Quick Start

Server Setup

1. Install Rust and Cargo
2. Set environment variables:
   • RPC_URL: Solana RPC endpoint
   • WS_URL: Solana WebSocket URL
3. Run cargo run

TypeScript Client Example

async function submitTransaction(transactionBytes: Buffer) {
  const response = await fetch('http://localhost:3001/send_txn', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ txn: Array.from(transactionBytes) })
  });
  return response.json();
}

Transaction Retry Strategy

• Maximum retries: 10
• Initial retry delay: 100ms
• Exponential backoff recommended

Logging

Uses tracing for detailed logs including:

• Timestamps
• Thread IDs
• Error context
• Performance metrics

Performance Considerations

• Utilizes QUIC for efficient networking
• Configurable transaction processing
• Supports both single and batch transactions