The WalletConnect/walletconnect-monorepo is a collection of packages and tools that enable secure communication between mobile wallets and dapps (decentralized applications) on the web. It provides a standardized protocol for connecting wallets to dapps, allowing users to interact with blockchain-based applications using their mobile devices.

Pros

• Cross-Platform Compatibility: WalletConnect supports a wide range of mobile wallets and dapps, making it a versatile solution for connecting users to the decentralized ecosystem.
• Secure Communication: The protocol uses end-to-end encryption to ensure secure data transfer between the wallet and the dapp, protecting user information and transactions.
• Improved User Experience: By allowing users to interact with dapps using their mobile wallets, WalletConnect enhances the overall user experience and reduces the friction associated with web-based blockchain interactions.
• Ecosystem Integration: The project is widely adopted by the blockchain community, with support from various wallet providers and dapp developers, making it a reliable and well-supported solution.

Cons

• Complexity: The WalletConnect ecosystem can be complex, with multiple packages and tools that may require a learning curve for new users or developers.
• Dependency on Mobile Wallets: The project's functionality is heavily dependent on the availability and compatibility of mobile wallets, which may limit its usefulness in certain scenarios.
• Potential Security Risks: While the protocol aims to provide secure communication, there is always a risk of vulnerabilities or potential security breaches that could compromise user data or funds.
• Ongoing Maintenance: As a rapidly evolving ecosystem, the WalletConnect project requires continuous maintenance and updates to keep up with the changing landscape of blockchain technologies and user needs.

Code Examples

Here are a few code examples demonstrating the usage of the WalletConnect library:

// Connecting a wallet to a dapp
import WalletConnect from "@walletconnect/client";

const connector = new WalletConnect({
  bridge: "https://bridge.walletconnect.org", // Required
  qrcodeModal: require("@walletconnect/qrcode-modal").default,
});

// Check if connection is already established
if (!connector.connected) {
  // create new session
  await connector.createSession();
}

// Subscribe to connection events
connector.on("connect", (error, payload) => {
  if (error) {
    throw error;
  }

  // Get provided accounts and chainId
  const { accounts, chainId } = payload.params[0];
});

// Sending a transaction
import WalletConnect from "@walletconnect/client";
import { ethers } from "ethers";

const connector = new WalletConnect({
  bridge: "https://bridge.walletconnect.org",
  qrcodeModal: require("@walletconnect/qrcode-modal").default,
});

// Send transaction
const txParams = {
  to: "0x...", // Required
  from: connector.accounts[0], // Required
  data: "0x...", // Optional
  value: "0x...", // Optional
  gasLimit: "0x...", // Optional
  gasPrice: "0x...", // Optional
};

const txHash = await connector.sendTransaction(txParams);
console.log(txHash);

// Signing a message
import WalletConnect from "@walletconnect/client";
import { ethers } from "ethers";

const connector = new WalletConnect({
  bridge: "https://bridge.walletconnect.org",
  qrcodeModal: require("@walletconnect/qrcode-modal").default,
});

// Sign message
const message = "Hello, WalletConnect!";
const signature = await connector.signMessage([message]);
console.log(signature);

Getting Started

To get started with the WalletConnect library, follow these steps:

1. Install the required packages:

npm install @walletconnect/client @walletconnect/qrcode-modal

2. Import the necessary modules and create a new WalletConnect instance:

import WalletConnect from "@walletconnect/client";
import