Ethereum: Verifying a Private Key and Generating a Public Address with Python

In this article, we will explore how to use the official Ethereum library for Python to verify a private key and generate a public address. We will also demonstrate how to compress the public key into hexadecimal format.

Prerequisites

To run this example, you must have Python installed on your machine. You can download it from the official Python website: <

For this example, we will use the eth library, which is a simple and easy-to-use Bitcoin-related library for Python.

Install the eth library

Run the following command in your terminal to install the eth library:

pip install ethlib

import ethlib





Choose a private key (replace with your own)
private_key = "your_private_key_hex_here"
try:

Verify the private key
private_key_obj = ethlib.EthAccount.fromPrivateKey(private_key.encode())
print("Private key verified:")
print(private_key_obj.publicKey.hex())
except ValueError as e:
print(f"Error: {e}")

In this example, we first import the ethliblibrary. Next, we create an instance of theEthAccountclass using our private key in hexadecimal format (replace "your_private_key_hex_here" with your actual private key). ThefromPrivateKeymethod verifies the private key and returns an account object.

ThepublicKey.hex()attribute returns a compressed hexadecimal representation of the public key. We print this value to verify that the verification was successful.

import ethlib

Select the private key (replace with your own)
private_key = "your_private_key_hex_here"
try:

Generate a new public address
public_address_obj = ethlib.EthAccount.fromPrivateKey(private_key.encode())
print("Public address:")
print (public_address_obj.publicKey.hex())
except ValueError as e:
print(f"Error: {e}")

In this example, we create an instance of the EthAccountclass using our private key. We then generate a new public address for the account using thefromPrivateKeymethod.

ThepublicKey.hex()attribute returns a compressed hexadecimal representation of the public key. We print this value to get the expected 1Btc address (replace “your_private_key_hex_here” with your actual private key).

• To generate a new private key, you can use thecreateNewKeymethod of theEthAccountclass.

• You can also use theprintAddressattribute of theEthAccountobject to get the public address as a string.

In this article, we explored how to verify a private key using Python and generate a public address. We demonstrated how to compress the public key into hexadecimal format using thefromPrivateKey` method. With this library, you can easily work with Ethereum accounts and generate new keys or addresses if needed.