DeFi RPC Interface (Hyperswarm + Hypercore)

This project implements a multi-user backend interface for interacting with a DeFi protocol on an EVM testnet. The system provides wallet management, transaction handling, and a distributed RPC interface using the Hyper ecosystem.

The project is written entirely in JavaScript and does not include a UI, as interaction is performed through Hyperswarm RPC.

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Features

Wallet Management

• Generates a unique wallet for each user
• Securely stores private keys
• Uses Hypercore / Hyperbee for persistent storage

Transaction Module

Handles interactions with the DeFi protocol:

• Read operations (protocol state)
• Write operations (e.g., staking, transactions)

RPC Interface

Users interact with the system via Hyperswarm RPC instead of REST APIs.

Supported RPC actions:

• Execute protocol transactions
• Retrieve user transaction history
• Query protocol state

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Tech Stack

• JavaScript (Node.js)
• Hypercore
• Hyperbee
• Hyperswarm RPC
• HyperDHT
• EVM testnet

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Project Structure

/db
  rpc-server/
  rpc-client/

wallet.js        # wallet generation & storage
protocol.js      # DeFi protocol interaction
server.js        # RPC server
client.js        # RPC client example

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Setup

1. Install dependencies

npm install

Install HyperDHT globally:

npm install -g hyperdht

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2. Start a bootstrap DHT node

hyperdht --bootstrap --host 127.0.0.1 --port 30001

This creates a local distributed hash table network used for RPC discovery.

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3. Run the RPC server

node server.js

The server will output a public key, which clients use to connect.

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4. Run the RPC client

Update the client with the server's public key and run:

node client.js

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Example RPC Action

Example request payload:

{
  "user": "0xUserAddress",
  "amount": "25.6"
}

Example response:

{
  "tx": "0xTransactionHash"
}

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Limitations / Future Improvements

Due to time constraints (8 hour limit), the implementation may not include:

• Full transaction history indexing
• Advanced key encryption / key management
• Robust error handling
• Complete DeFi protocol coverage
• Production-ready security and validation
• Automated testing

With more time, these could be addressed by:

• adding encrypted wallet storage
• implementing indexing for faster queries
• adding retries and transaction monitoring
• integrating multiple DeFi actions

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Notes

This project demonstrates how Hypercore-based infrastructure and Hyperswarm RPC can replace traditional client-server APIs for interacting with blockchain protocols in a distributed environment.