A lightweight simulator of a blockchain mempool and a candidate block builder implemented in Go, with a real-time frontend dashboard in JavaScript. Demonstrates low-latency transaction processing, concurrency in Go, and transaction prioritization by “profit” — core concepts relevant to DEX and Layer 1 blockchain infrastructure.

Backend (Go)

• Simulates a mempool receiving random transactions with varying profit values.
• Concurrent block builder selects top N profitable transactions every second.
• Demonstrates Go concurrency using goroutines and mutexes.
• Exposes HTTP API endpoints:
  • /mempool → list all pending transactions
  • /block → list top transactions for candidate block

Frontend (JavaScript Dashboard)

• Displays mempool and candidate block transactions in real-time.
• Updates every second to simulate live blockchain activity.
• Shows transaction ID, sender, amount, profit, and timestamp.

Built to explore MEV-aware transaction ordering and production-ready Go microservices, this project mirrors the logic behind transaction prioritization and block building in DEXs, without needing Solidity or actual blockchain deployment.

go-mev-sim/
├── main.go         # Starts mempool, block builder, HTTP server
├── mempool/
│ └── mempool.go    # Handles transaction generation and storage
├── blockbuilder/
│ └── builder.go    # Selects top transactions by profit
├── frontend/
│ ├── index.html    # Simple dashboard interface
│ └── script.js     # Fetches data from backend and renders tables
├── go.mod
└── README.md

go run main.go

Open frontend/index.html in a browser. It fetches data from http://localhost:8080 and updates live.

• Concurrency & Performance: Uses goroutines and mutexes for efficient, concurrent processing.

• MEV Awareness: Demonstrates prioritization of transactions by “profit,” analogous to real-world block-building strategies.

• Production-Oriented Design: Modular code structure, HTTP API, and frontend dashboard illustrate full-stack engineering practices.