Cancel User Query with MetaMask in Your App
As an app developer, you know the importance of providing a seamless user experience. One often overlooked aspect is handling user queries, especially those triggered by external wallets like MetaMask. In this article, we’ll look at how to override user queries based on user actions within your app.
Problem: Canceling User Queries
When you initiate a transaction from your app, you’re likely using the MetaMask API to interact with your wallet. However, if the user accepts or declines the query, the API can still initiate further interactions or queries. This can lead to unnecessary delays, increased error rates, and user frustration.
Solution: Canceling User Queries
To cancel a user query based on user actions within your application, you need to implement a robust event handling system that tracks user interactions. Here's a step-by-step guide:
1. Set up event handling
In your application code, set up an event listener for the "onConfirm" and "onReject" events fired by MetaMask. These events contain information about the user's decision:
const wallet = new Web3Wallet();
wallet.on('connection', (connection) => {
connect.on('confirmed', () => {
console.log('User confirmed transaction:', connection.transaction);
});
connect.on('rejected', () => {
console.log('User rejected transaction:', connection.transaction);
});
});
2. Track user actions
Use a unique ID or token to associate each user with the correct wallet instance. This allows you to track user actions and cancel queries accordingly:
const userId = '1234567890';
wallet.get('user_id', (err, user) => {
if (err || !user) return;
console.log('User ID:', userId);
const transactionID = connection.transaction.id;
wallet.update(userID, transactionID, (err, result) => {
if (err || !result) return;
// Cancel the query based on user actions
if (result.cancelled) {
console.log('The questionnaire was canceled by the user:', userId);
} else {
console.log('The user rejected the transaction.');
}
});
});
3. Handle the delete event
When the delete event is triggered, update your database or cache with the corresponding wallet instance ID:
wallet.on('cancel', () => {
const userId = '1234567890';
console.log('Cancel prompt canceled by user:', userId);
// Update database or cache with canceled transaction ID
});
4. Handle the bounce event
When the reject event is triggered, update your database or cache with the appropriate wallet instance ID:
wallet.on('reject', () => {
const userId = '1234567890';
console.log('User rejected transaction:', userId);
// Update database or cache with rejected transaction ID
});
By following these steps and leveraging event handling, you can effectively cancel user queries based on user actions within your application using MetaMask.
Example of use:
Let's say you're building a decentralized application (dApp) that allows users to create and manage their own wallets. When the user initiates a transaction, fire the "onConnection" event:
const wallet = new Web3Wallet();
wallet.on('connection', (connection) => {
connect.on('confirmed', () => {
console.log('User confirmed transaction:', connection.transaction);
});
connect.on('rejected', () => {
console.log('User rejected transaction:', connection.transaction);
});
});
When the user accepts the request, you update the wallet instance ID and delete the previous transaction:
``` javascript
const userId = '1234567890';
wallet.update(userId, connection.transaction.id, (error, result) => {
if (error || !