Here is an article on the subject:
Metamask: ABI call Metamask’s RPC service provider web3.js
When working with decentralized applications (DAPP) built on Ethereum, one common challenge interacts with intelligent contracts hosted on the Ethereum network. One of the most convenient ways to do this is to use a metamask-like tool that provides an easy-to-use application interface with DAPPs through its network interfaces.
In your case, you want to call the ERC20 (Ethereum-based ID) SALDOF “method of the Smart contract hosted on the Ethereum network. This requires you to use a web3.js and Metamask RPC service provider to make a call.
Step 1: Set your Metamask account
First, make sure that the Metamask wallet is installed in the browser. If you do not already have a metamask account, follow these steps:
- Go to [Metamask] ( in the browser.
- Click the “Create a new wallet” button.
- Follow the prompts to create a new wallet.
Step 2: Install web3.js and set Metamask RPC service provider
You can install web3.js. You can do this by performing the next command of your end:
`Bash
NPM Install Web3
`
After installing web3.js, you need to determine your Metamask account to provide an RPC terminal on the Ethereum network.
- Go to [My Etherchain] ( and create a new wallet.
- Click “wallet”> “Add a new wallet”.
- Follow the prompts to add your wallet to Etherchain.
- From the settings, select the “Web3 provider” as the RPC terminal. You can choose between different service providers, such as infrastructure, alchemy or Localnode.
Step 3: Use web3.js and Metamask’s RPC provider to call the balance
Now that you have set up your Metamask account for an RPC provider, it’s time to use the web3.js application to make a “Saldof” method call from an ERC20 intelligent contract. Here’s a sample:
`Javascript
Const web3 = new web3 (new web3.providers.httpprovider (‘
// Select the Ethereum account associated with Metamask wallet
web3.eth.ccounts.add (‘0x …’);
// Call the SALDOF METHOD OF ERC20 Smart Agreement
web3.eth.call ({
Method: ‘balance’,
Parameters: [‘0x …’],
Arguments: [],
}, (error, result) => {
if (error) throw an error;
Console.log (result);
});
`
In this example, we use the eth.Accounts.add method to select an Ethereum account associated with your Metamask wallet. Then we call the ERC20 intelligent contract Saldof method using the web3 ‘eth.call` method.
conclusion
With these steps, you have successfully used Metamask’s RPC service provider from web3.js to invite the “SALDOF” method for an ERC20 -intelligent contract hosted on the Ethereum network. By following this guide, you can easily interact with DAPPs built on Ethereum Metamask and Web3.js.