About the Project
Cross-Chain Messaging App
(Ethereum Sepolia ↔ Polygon Amoy using Hyperlane)
Overview
This project is a blockchain-based messaging app that lets users send messages between two different blockchains: Ethereum's Sepolia testnet and Polygon's Amoy testnet. It uses Hyperlane, a cross-chain communication protocol, to make this possible.
What It Does
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✅ Send Messages Across Blockchains
You can send a message from one test network (like Sepolia) to another (like Amoy), even though they are separate blockchains. -
🔁 Live Message Tracking
Once a message is sent, the app checks its delivery status regularly and updates you in real-time (e.g., pending, delivered, failed). -
🕒 View Message History
The app shows a complete list of all sent and received messages, along with timestamps and whether the message was delivered or not.
Why This Project is Useful
- It demonstrates how different blockchains can “talk” to each other—something that’s becoming more and more important in Web3.
- Helps developers and testers try out cross-chain features in a safe, low-cost testnet environment.
- Can be a base for building more complex cross-chain apps, like sending data or tokens between networks.
Built With
- Hyperlane – to handle the actual message sending across chains
- Ethereum Sepolia + Polygon Amoy – as the two test blockchains
- Smart Contracts + Frontend UI – to send, receive, track, and show messages
- Polling Logic – to keep checking if the message arrived on the other chain
What’s Next
- Add support for more testnets and eventually mainnets
- Improve message delivery speed and user experience
- Possibly expand to token transfers or other cross-chain use cases