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Metamask: Web3 JS (MetaMask Ext and Metamask Mobile)

Published by on February 9th, 2025.


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METAMASK: Web3.js – Extensor and mobile application

As a React developer who builds decentralized applications (DAPPS) in the Ethereum block chain, it is likely to be familiar with the importance of safe communication between its front-end and its backend. A crucial aspect is to ensure that the functions of your contract are called successfully since its application.

In this article, we will deepen how to use MetamSk, a web 3.JS extensor for ReACT applications, to call the contract functions in your Ethereum Testnet or local Mainnet.

What is Metamk?

Metamask is an open source browser extension that allows users to interact with the Ethereum block chain directly in their web browsers. It provides an easy to use interface to send and receive ETHER (ETH), as well as interact with several contract functions.

Why the functions of the call contract with MetamSk?

Metamask: Web3 JS (MetaMask Ext and Metamask Mobile)

Calling the functions of the contract in your Netnet or Local Mainnet can be useful for tests, development or even production implementation. However, it is essential to keep in mind that calling the contract functions directly from an extension of the browser may not work due to safety and compatibility problems.

Here are some scenarios in which it is possible to call the functions of the contract using Metamask:

Metamask Extender and Metamask Mobile application **

The Metamask extensor is a light extension of the browser that allows you to access the Ethereum block chain in your web browser. It is available for Chrome, Firefox, Safari and Microsoft Edge. Once installed, you can use the Metamask extender to interact with its contract functions.

How to call the contract functions using Metamk

To call the functions of the contract with Metamk, follow these steps:

Here is an example of how you can call a contract function using MetamSk in its React component:

“ JSX

import react, {usestate} of ‘react’;

Import Metamaskwebsdk from ‘@metamask/web-sdk’;

const web3 = metamaskwebsdk;

Mycomponent function () {

const [contractaddress, setcontractaddress] = usstate (‘0x …’);

const callfunction = async () => {

attempt {

// Call contract function using MetamSk

const web3 = new web3 (Metamkwebsdk);

Const accounts = alea metamaskwebsdk.getacount (). Find ((accounts) => accounts.address === Contractaddress);

Const date = Waiting web3.eth.call ({a: contractaddress, data: ‘0x …’, value: ‘0x …’});

console.log (result); // Issue the function returned by the contract

} capt (error) {

console.

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