Disabling of the Metamask portfolio from a dapp using web3.js
In this article, we will explore how to disconnect the Metamask portfolio from an DAP application (decentralized application) using web3.js. This is particularly useful when it is necessary to make changes or changes to the DAP without having access to the Metamask portfolio.
Understanding of the bases
Before immersing yourself in the solution, we quickly examine some essential concepts:
* Web3.js : a popular Javascript bookshop to interact with the Blockchain Ethereum.
* Wallet Metamask : an intuitive interface for the management of multiple cryptocurrencies on a single device. It allows you to connect your wallet to various applications and services.
* DAP (decentralized application) : a self-execution contract with the help of intelligent contracts, often based on the Ethereum blockchain.
Passo-step solution
Here’s how you can disconnect your Metamask portfolio from a DAP using web3.js:
1. Install the requested bookstores
First, make sure that `Web3.js is Metamask Wallet Web Api (if available) is installed in the project.
`Bash
NPM installs web3 metamask-web-api
`
Or if you are using the thread:
Bash
Filato Add Web3 Metamask-Web-API
`
2. Get the web3 application
You will have to get a web3 instance, necessary to interact with the Ethereum blockchain.
Javascript
// matters and initializes the web3 library
Const Web3 = Requirements ("Web3");
Const Providentl = " // Replace with your ID of the Infura project
Const Web3 = New Web3 (New Web3.Priders.httrprovider (Providence));
3
To disconnect the Metamask portfolio from a DAP, you need to send a message is disconnecting to the APP. Here is an example:
Javascript
Const HandleClick = Async () => {
Attempt {
// Get the application for Network Provider and Web3.
Const Web3 = Waiting Getweb3 () ...
// Disconnect the Metamask portfolio from the DAPP
It awaits DisconnectMetamaskwallet (web3, "
} Catch (error) {
console.error ("disconnection of error:", error);
}
};
DisconnectMetamaskwallet (Web3, Providence) {
Return New Promise ((Resolve, Reject) => {
// Send a message of disconnection to the DAPP
Web3.eth.Sendransation ({
From: "0xyour Metamask address",
A: "
Value: 1,
Gaslimit: 20000,
Gassrice: web3.utils.towei ("20", "Gwei"),
Nonce: Web3.eth.gettransationCount ("0xy Your Metamask address")
}, (error, result) => {
If (error) {
Refuse (error);
} Other {
// Solve the promise with a success message
solve ();
}
});
});
}
4. Manage waste
Make sure to correctly manage waste in the HandleClick 'function.
Javascript
// capture any refusal errors and view an error message
Catch (error) {
Console.error ("Error disconnecting the metamask portfolio:", error);
}
`
Conclusion
Following these steps, you properly disconnected your Metamask portfolio from a DAP using web3.js. This approach allows unprecedented interactions between the Metamask portfolio and the DAPs without manual intervention requirements or changes to both sides.