Metamask: How to sign a transaction from React Native with WalletConnect?

Signing transactions with Metamask in React Native via WalletConnect

As your dApp becomes more complex, it’s important to integrate wallet solutions to ensure a seamless user experience and security. A popular solution is MetaMask — a popular blockchain wallet that provides direct access to the Ethereum network from any web browser or mobile application. In this article, we will look at how to sign transactions in React Native using WalletConnect.

Introduction to WalletConnect

To use WalletConnect, you must have the following components installed:

• react-native-walletconnect (React Native library)

• MetaMask Wallet (download and install from [MetaMask website](

After installation, import and initialize the React Native component:

import {connect} from 'react-native';
import WalletConnect from '@react-native-walletconnect/react-native';
const ConnectedApp = ({signedTx}) => {
return (
);
};

Transaction signing with Metamask

To sign the transaction, it is necessary:

• Get MetaMask wallet object: use connect from React Native and initialize WalletConnect:

import {connect} from 'react-native';
import WalletConnect from '@react-native-walletconnect/react-native';
const ConnectedApp = ({signedTx}) => {
const [wallet, setWallet] = useState(null);
useEffect(() => {
if (signedTx) {
setWallet(WalletConnect.createProvider(
WalletConnect.Eth,
'your-metamask-credentials', // replace with your MetaMask credentials
));
}
}, [signedTx]);
return (
{wallet && (
)}
);
};

In this example, we use WalletConnect.createProvider to create a provider instance for the Ethereum network. We then optionally transfer your MetaMask credentials to the provider.

Manage Signed Transactions

When a user signs a transaction, you can use the signedTx object to perform various actions on the blockchain:

• Send Transaction: Call signedTx.send() to send a signed transaction.

• Getting transaction details: Use signedTx.getTransactionDetails() to get transaction details (eg hash, block number).

• Transaction Confirmation Check: Use signedTx.isTransactionOnChain() to check if a transaction has been fetched or confirmed.

Here’s a sample code to get you started:

const SignedTransaction = async() => {
const signedTx = await exportedProvider?;
ask {
// Send the signed transaction
await signedTx.send();
console.log('Transaction sent');
} catch (error) {
console.error(error);
}
};
SignedTransaction();

Safety measures

You should always protect your credentials when using MetaMask. Make sure you:

• Store your MetaMask credentials in a safe place.

• Provide users with only necessary credentials.

• Update your MetaMask credentials regularly to stay safe.

By following these steps and examples, you will be able to integrate WalletConnect into your React Native dApp for seamless transaction signing. Remember to handle signed transactions securely and use them responsibly.