Nicholas

@drdnero

83 Following

23 Followers

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What’s Next? 🔹 Expand it to support multiple chains 🔹 Add token transfers using Hyperlane Warp Messaging 🔹 Implement gas fee optimization 📚 Resources: Hyperlane Docs: https://docs.hyperlane.xyz

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return ( <div> <input type="text" onChange={(e) => setMessage(e.target.value)} placeholder="Enter message" /> <button onClick={sendMessage}>Send Message</button> </div> ); } export default MessageSender; Testing & Deployment Test on Local Fork Use Hardhat to simulate cross-chain calls: npx hardhat node Deploy Frontend Host on Vercel or Netlify: npm run build npx vercel deploy Final Thoughts 🚀 Congrats! You just built a Hyperlane-powered cross-chain messaging app!

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Frontend Integration (React + Ethers.js) Build a simple frontend to let users send messages between chains. React Component (MessageSender.js) import { useState } from "react"; import { ethers } from "ethers"; import contractABI from "./InterchainMessenger.json"; function MessageSender() { const [message, setMessage] = useState(""); async function sendMessage() { const provider = new ethers.providers.Web3Provider(window.ethereum); const signer = provider.getSigner(); const contract = new ethers.Contract(process.env.CONTRACT_ADDRESS, contractABI, signer); const tx = await contract.sendMessage(420, process.env.RECIPIENT_CONTRACT, message); await tx.wait(); alert("Message Sent!"); }

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Sending a Cross-Chain Message You can call the sendMessage function from a front-end dApp or script: const ethers = require("ethers"); const contractABI = require("./artifacts/InterchainMessenger.json"); async function sendMessage() { const provider = new ethers.providers.JsonRpcProvider(process.env.ETHEREUM_RPC_URL); const wallet = new ethers.Wallet(process.env.PRIVATE_KEY, provider); const contract = new ethers.Contract(process.env.CONTRACT_ADDRESS, contractABI, wallet); const tx = await contract.sendMessage(420, process.env.RECIPIENT_CONTRACT, "Hello from Ethereum!"); await tx.wait(); console.log("Message Sent!"); } sendMessage();

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event MessageSent(uint32 destination, address sender, string message); event MessageReceived(address sender, string message); constructor(address _mailbox) { mailbox = IMailbox(_mailbox); } function sendMessage(uint32 destinationDomain, address recipient, string calldata message) external { mailbox.dispatch(destinationDomain, recipient, bytes(message)); emit MessageSent(destinationDomain, msg.sender, message); } function handle(uint32, bytes32 sender, bytes calldata message) external { require(msg.sender == address(mailbox), "Unauthorized sender"); lastSender = address(uint160(uint256(sender))); lastMessage = string(message); emit MessageReceived(lastSender, lastMessage); } }

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Deploying the Contract on Two Chains Modify hardhat.config.js: require("@nomicfoundation/hardhat-toolbox"); require("dotenv").config(); module.exports = { networks: { ethereum: { url: process.env.ETHEREUM_RPC_URL, accounts: [process.env.PRIVATE_KEY], }, optimism: { url: process.env.OPTIMISM_RPC_URL, accounts: [process.env.PRIVATE_KEY], }, }, solidity: "0.8.20", };

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Writing the Cross-Chain Smart Contract Create a Solidity contract that: ✅ Sends a message from one chain to another ✅ Receives the message on the target chain 📜 contracts/InterchainMessenger.sol // SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import "@hyperlane/contracts/interfaces/IMailbox.sol"; contract InterchainMessenger { IMailbox public mailbox; address public lastSender; string public lastMessage;

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Setting Up Your Development Environment Prerequisites 🔹 Install Node.js (v18+) 🔹 Install Hardhat for smart contract development 🔹 Install MetaMask (for interacting with deployed contracts) 🔹 Get some testnet ETH (for gas fees) Install Dependencies Run the following command in your terminal: mkdir hyperlane-crosschain && cd hyperlane-crosschain npm init -y npm install --save-dev hardhat dotenv ethers @openzeppelin/contracts

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Understanding Hyperlane & Interchain Messaging What is Hyperlane? Hyperlane is a modular interoperability protocol that lets you send messages and assets between blockchains. 🔹 Why Use Hyperlane? • Permissionless: Deploy on any EVM-compatible chain. • Modular Security: Customize security settings based on your needs. • Cross-Chain Communication: Easily send messages, tokens, and data between chains. How It Works Hyperlane operates using mailboxes: 📩 Sender Contract → Hyperlane Mailbox → 🌍 Destination Chain → 📬 Receiver Contract

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Build Your First Cross-Chain App with Hyperlane This tutorial will guide you through creating a simple cross-chain messaging app using Hyperlane, allowing users to send messages from one blockchain to another. What You’ll Learn ✅ How to deploy a cross-chain smart contract ✅ How to send and receive messages across different chains ✅ How to integrate Hyperlane’s interchain messaging into a dApp

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Welcome to the Metalayer 🌋 (Caldera x Hyperlane) 🛠 @Calderaxyz’s Metalayer is a framework that connects 100+ rollups into one interoperable network. ✨ Hyperlane enables fast cross-chain messaging, acting as Metalayer’s own iMessage system! 🚀 At launch, Metalayer will support: ✅ Caldera Rollups ✅ @zksync, @Optimism, @base, @arbitrum, Ethereum 🔍 Learn more here: https://docs.caldera.xyz/metalayer/about 🔗https://x.com/hyperlane/status/1894471565636735057?s=46&t=PJltuNJSPGXJv1iRYRFBaQ SVM Expansion Continues – Hyperlane x Sonic SVM 🎮 🎮 @SonicSVM is the first-ever @Solana chain extension and a hub for on-chain gaming! 🚀 With Hyperlane powering the native token bridge, Sonic SVM now has interchain applications across 140+ chains! 🔗 https://x.com/hyperlane/status/1895136529393295744?s=46&t=PJltuNJSPGXJv1iRYRFBaQ The Hyperlane ecosystem is growing FAST! Which update excites you the most? Let’s discuss below! 👇🚀

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Hyperlane Weekly Roundup: The Expansion Never Stops! 🔥 This week was packed with major milestones, expansions, and integrations for Hyperlane. Let’s dive in! 👇 Hyperliquid Expansion – Borrow & Lend with wHYPE! 💰 You can now lend or borrow USDT on HyperEVM (@HyperliquidX) using wHYPE as collateral! 🔥 USDT is available through Hyperlane, making cross-chain liquidity easier than ever. ⏩ Try it out now: https://app.timeswap.io 🔗 https://x.com/hyperlane/status/1894225398306587054?s=46&t=PJltuNJSPGXJv1iRYRFBaQ Hyperlane Takes ETHDenver – The Future of Interoperability 🔗 @thePalenimbus (Hyperlane’s co-founder) spoke at ETHDenver on why crypto cannot succeed without open interoperability. Key takeaways: Multi-chain development requires seamless interop. Next-gen L2 innovations (EVM SDKs, altVMs, etc.) depend on it. https://x.com/ethereumdenver/status/1894468161715802216?s=46&t=PJltuNJSPGXJv1iRYRFBaQ

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🧵 Why Hyperlane is the Most Permissionless Interoperability Protocol 🚀 1/ Cross-chain messaging is essential, but most protocols have gatekeepers. You need approvals to integrate. Not with Hyperlane. It’s fully permissionless—any chain can deploy it without asking anyone. 2/ Unlike LayerZero & Wormhole… 🔹 LayerZero requires official integration approvals. 🔹 Wormhole relies on a fixed validator set (Guardians). 🔹 Hyperlane? Anyone can permissionlessly deploy it on any chain. 3/ Why does permissionless interoperability matter? ✅ No bottlenecks – Developers don’t have to wait for team approvals. ✅ Supports any chain ✅ True decentralization 4/ This unlocks new possibilities: 💡 A new L1 or L2 can instantly connect to multiple chains without relying on third-party decisions. 💡 Developers can build cross-chain apps without limits. 5/ Hyperlane isn’t just a messaging protocol—it’s a framework for open, permissionless cross-chain communication. 🌍

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What is Hyperlane? Hyperlane is an interchain messaging protocol that enables seamless communication between blockchains. Think of it as the “internet of blockchains,” allowing apps to interact across ecosystems effortlessly. 2/ How does it work? Hyperlane uses its unique Sovereign Consensus model, letting developers customize security for their interchain dApps. This flexibility ensures better control over speed, cost, and security compared to rigid alternatives. 3/ Advantages Over Other Protocols: •Customizable Security: Developers set the rules, not the protocol. •Modularity: Easily integrates with any chain. •Developer-Friendly Tools: APIs and SDKs simplify cross-chain app building. •Scalability: Enables efficient, low-latency interchain transactions. 4/ Why it matters Hyperlane bridges the gap between isolated blockchains, creating a truly interoperable ecosystem for DeFi, NFTs, and beyond. 5/ Dive deeper into Hyperlane and its vision: hyperlane.xyz 🚀

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We don't need another kaito where influencers shit post for money.

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Why's everyone lying that they're making money here.

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Do you regularly make calls?

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Everyone here lives in a bubble. Always posting something that's very difficult to find and no one wants to help unlike on X. This app has a long way to go.

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Where can I find this?

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