Here is a step-by-step guide on how to get the number of pending transactions in Metamask using Web3-React:
1. Configure your MetaMask wallet and the Web3-React library
First, you need to set up your MetaMask wallet and install the web3-react
library.
npx metamask installed
npm install web3-react
2. Import the required libraries into your code
In your JavaScript file, import the required libraries.
import Web3 from 'web3-react';
import MetaMaskProvider from "./metamask-provider.js";
3. Initialize the MetaMask provider and get the user address
Create an instance of MetaMaskProvider
and use it to get the current user address.
const provider = new MetaMaskProvider();
const userAddress = provider.getAddress();
4. Create a Web3 instance with the MetaMask provider
Now create a new instance of `Web3'' using your provider.
const web3 = new Web3(provider);
5. Use the eth_getTransactionCountmethod to get the number of pending transactions
Use theeth_getTransactionCountmethod of the
Web3instance to get the number of pending transactions for a given address.
async function getPendingTransactions() {
const txCounts = await web3.eth.getTransactionCount(userAddress);
return txCounts;
}
// Call the function
getPendingTransactions().then((txCounts) => console.log(txCounts));
Use case examples
Here's how you can modify your code to handle errors and display pending transactions in a more user-friendly way.
import Web3 from 'web3-react';
import MetaMaskProvider from "./metamask-provider.js";
const provider = new MetaMaskProvider();
const web3 = new Web3(provider);
async function getPendingTransactions() {
try {
const txCounts = await web3.eth.getTransactionCount(userAddress);
return txCounts;
} catch (error) {
console.error(error);
return 0; // Returns 0 if there are no pending transactions
}
}
// Call the function
getPendingTransactions().then((txCounts) => console.log(txCounts));
How to handle errors and edge cases
When using eth_getTransactionCount, you may encounter errors or limit issues. Here's how you can change your code to handle them:
async function getPendingTransactions() {
const txCounts = await web3.eth.getTransactionCount(userAddress);
// Check for transaction count errors
if (txCounts < 1) { // If there are no pending transactions, return 0
console.error('No pending transactions found');
return 0;
}
return txCounts;
}
// Call the function
getPendingTransactions().then((txCounts) => console.log(txCounts));
This code will log an error if there are no pending transactions and will display "0" instead.
Conclusion
To get the number of pending transactions in Metamask using Web3-React, you can follow these steps:
- Initialize the MetaMask wallet and the web3-react
library.
- Get the current user address usingMetaMaskProvider
.
- Create a newWeb3
instance using your provider.
- Use theeth_getTransactionCount` method to get the number of pending transactions.
Remember to handle errors, edge cases, and potential edge issues when working with Web3-React in your applications.