📡 Decentralized Crypto Price Tracker using Hyperswarm + Hypercore

This project fetches average prices for the top 5 cryptocurrencies (by market cap) against USDT from the top 3 exchanges, stores them in a decentralized Hypercore/Hyperbee DB, and exposes them via Hyperswarm RPC.

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🔧 Features

• Fetches prices from CoinGecko every 30 seconds.
• Calculates average price across top 3 exchanges per coin.
• Stores minimal but essential historical data in Hyperbee.
• Exposes:
  • getLatestPrices
  • getHistoricalPrices
• Fully decentralized DHT/RPC network.
• Easy to extend and run.

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📦 Setup

1. Clone and Install

git clone https://github.com/your-org/CryptoPriceTracker.git
cd CryptoPriceTracker
npm install

2. Install HyperDHT CLI (for bootstrap node)

npm install -g hyperdht
hyperdht --bootstrap --host 127.0.0.1 --port 30001

🚀 How to Run

1. Start the Application

npm run start

This will:

Start the price scheduler (fetching prices every 30 seconds)

Start the RPC server (prints public key to console)

Run a demo RPC client after 3s (you can replace the public key as needed)

🚀 How to Run [Client API]

1. Start the API

npm run api
curl "http://localhost:3000/prices"

🔄 Flow Overview

+-------------------------+
| Scheduler (Every 30s)  |
+----------+-------------+
           |
           v
+-----------------------------+
| fetchTop5CryptoPrices()     |
| -> top 5 coins              |
| -> top 3 exchanges          |
| -> average prices           |
+-----------------------------+
           |
           v
+-----------------------------+
| store in Hyperbee DB        |
| (timestamped, efficient)    |
+-----------------------------+

           |
           +------------------------------+
           |                              |
           v                              v
+-------------------+         +----------------------------+
| RPC Server        |         | RPC Client (on-demand)     |
| Methods:          |         | - getLatestPrices()        |
| - getLatestPrices |         | - getHistoricalPrices      |
| - getHistorical   |         +----------------------------+
+-------------------+

🔐 Security Notes

Public RPC key is printed when server starts.

Client must know server's public key to query.

🧠 Improvements (Future Work)

Cache exchange metadata to reduce API load.

Add support for more fiat pairs.

Rate-limit CoinGecko calls to stay within free API limits.

Add persistence for seeds and keys.

👤 Author

Made by Linto Thomas with ❤️ using the Holepunch stack.

📄 License

MIT