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

Signing Transactions with Metamask in React Native via WalletConnect

As your dApp becomes more complex, it is essential to integrate wallet solutions for seamless user experience and security. One popular solution is MetaMask, a popular blockchain wallet that provides direct access to the Ethereum network from any web browser or mobile app. In this article, we will explore how to sign transactions in React Native via WalletConnect.

Introduction to WalletConnect

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

• react-native-walletconnect (React Native library)

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

Once installed, import and initialize the React Native component:

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

Signing a transaction with Metamask

To sign a transaction, you must:

• Get the 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 are using WalletConnect.createProvider to create a provider instance for the Ethereum network. We then pass your MetaMask credentials as an option to the provider.

Handling signed transactions

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

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

• Get transaction details: Use signedTx.getTransactionDetails() to retrieve transaction details (e.g., hash, block number).

• Check if transaction is confirmed: Use signedTx.isTransactionOnChain() to check if the transaction has been mined or confirmed.

Here is some code to get you started:

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

Security Considerations

When using MetaMask, you should always protect your credentials. Make sure to:

• Store your MetaMask credentials securely.

• Only share necessary credentials with users.

• Update your MetaMask credentials regularly to stay secure.

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

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