Cancellation of a user prompt with metamask in your application
As an application developer, you are aware of the importance of providing transparent user experience. An often overlooked aspect is to manage user prompts, in particular those triggered by external wallets like Metamask. In this article, we will explore how to cancel a user prompt according to the user action in your application.
The problem: cancellation of user prompts
When you trigger a transaction from your application, you probably use the Metamask API to interact with the wallet. However, when the user accepts or rejects the prompt, the API can always trigger additional interactions or prompts. This can cause unnecessary delays, an increase in error rates and frustration for the user.
Solution: Cancellation of user prompts
To cancel a user prompt according to the user action from your application, you will need to implement a robust event management system that follows user interactions. Here is a step by step guide:
1. Configuration of event management
In your application code, configure an event earphones for events onconfirm and ‘onreject’ triggered by Metamask. These events will contain information on the user’s decision:
`Javascript
Const wallet = new Wallet Web3 ();
wallet.on ('connection', (connection) => {
connection.on ('confirmed', () => {
Console.log ("Transaction confirmed by the user:", connection. Transaction);
});
connection.on ('rejected', () => {
Console.log ("transaction rejected by the user:", connection.transaction);
});
});
'
2. Follow the user's action
Use an identifier or a unique token to associate each user with their corresponding wallet instance. This will allow you to follow user actions and cancel the prompts accordingly:
Javascript
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 prompt according to the user action
if (result.cancelled) {
console.log ('invite canceled by the user:', Userid);
} other {
Console.log ("the user rejected the transaction.");
}
});
});
'
3. Manage the cancellation event
When a cancellation event is triggered, update your database or your cache with the corresponding portfolio instance ID:
Javascript
Wallet.on ('Cancel', () => {
Const Userid = '1234567890';
Console.log ('Cancel the invite canceled by the user:', Userid);
// update the database or the cache with the canceled transaction ID
});
'
4. Gire rejective event
When a rejection event is triggered, update your database or your cache with the corresponding wallet instance ID:
Javascript
Wallet.on ('reject', () => {
Const Userid = '1234567890';
Console.log ("Transaction rejected by the user:", Userid);
// update the database or the cache with rejected transaction ID
});
'
By following these steps and taking advantage of event management, you can effectively cancel user prompts according to the user action within your application using Metamask.
Example of use cases:
Suppose you create a decentralized application (DAPP) which allows users to create and manage their own portfolios. When a user initiates a transaction, you trigger the eventOnconnection ‘:
`Javascript
Const wallet = new Wallet Web3 ();
wallet.on ('connection', (connection) => {
connection.on ('confirmed', () => {
Console.log ("Transaction confirmed by the user:", connection. Transaction);
});
connection.on ('rejected', () => {
Console.log ("transaction rejected by the user:", connection.transaction);
});
});
'
When a user accepts the prompt, you update his portfolio instance ID and cancel the previous transaction:
` Javascript
Const Userid = ‘1234567890’;
Wallet.update (Userid, Connection.Transaction.id, (Err, Result) => {
If (err ||!
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