Ethereum: How to check confirmations number programmatically
Ethereum and Bitcoin Address Verification
==
In this article, we will explore how to programmatically verify the confirmation number of a specific Bitcoin address using the Blockchain.info API. We will also look at some best practices for validating addresses and transactions on Ethereum.
Address Confirmation
——————
Before diving into the code, let’s check the input addresses to make sure they are valid:
function isValidAddress(address) {
regular expression constant = /^[0-9a-fA-F]{40}$/;
returns regex.test(address);
}
const address1 = "1A1B2C3D4E5F6G7H8I9J0K";
const address2 = "abc123def456";
if (!isValidAddress(address1)) {
console.error("Invalid address:", address1);
} more {
console.log(Valid address: ${address1});
}
if (!isValidAddress(address2)) {
console.error("Invalid address:", address 2);
} more {
console.log(Valid address: ${address2});
}
This code defines the function “isValidAddress” which uses a regular expression to match the length and format of Bitcoin addresses. If the input address is valid, it returns “true”; otherwise, “false” is returned.
API Request
————-
To get an Ethereum address verification number using the Blockchain.info API, we need to make an HTTP request to their API endpoint. Here is a step-by-step guide:
- Get your Blockchain.info API key: Go to [Blockchain.info]( and create an account.
- Create a new API key: Once logged in, go to the “API” tab and click on “Keys”. Create a new API key by clicking on “New API Key”.
- Get your API URL: After creating your API key, copy the “key” and “secret” values.
- Make an HTTP request to the Ethereum blockchain API endpoint: Use a library like Axios or the browser console API to make a GET request to the Ethereum blockchain API endpoint.
Here’s an example using Axios:
import axios from 'axios';
const apiEndpoint = '
const apiKey = 'YOUR_API_KEY_HERE'; // Replace with your key
async function getConfirmationNumber(address) {
const headers = { "X-API-KEY": apiKey };
const params = {"to": address, "from": "0xYourAccountAddress", "block_number": "last_block", "confirmations": "1"};
try {
const response = wait axios.get(apiEndpoint, { params });
return response.data;
} catch (error) {
console.error(error);
}
}
const addressToGetConfirmationNumber = '0xYourAccountAddress';
getConfirmationNumber(addressToGetConfirmationNumber).then((confirmationNumberResponse) => {
if (! confirmationNumberResponse || confirmationNumberResponse.length === 0) {
console.log("No data returned.");
} more {
const confirmationNumbers = confirmationNumberResponse.map((item, index) => item.confirmations);
console.log(${confirmationNumbers[index]} confirmed transactions.);
}
});
Best Practices
—————
- Check for errors and exceptions: Always check the API response to make sure it is valid and does not return any errors.
- Confirm your entry: Make sure you have validated your Ethereum address and key before making a request to the blockchain API.
- Manage pagination: If you need to get multiple approvals, please note the pagination restrictions imposed by the blockchain API.
- Protect your API keys
: Never encrypt your API keys; consider using environment variables or secret management solutions.
Example use cases
——————
- Order tracking
: You can use this feature to track your orders via email. on the trading platform by sending a request with an Ethereum address and a page limit to get confirmation numbers.
2.
