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Ethereum: Verifying a Private Key and Generating a Public Address Using 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 show you how to compress a public key in hexadecimal format.

Prerequisites

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

In 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 it 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. We then instantiate theEthAccountclass using our private key in hexadecimal format (replaceyour_private_key_hex_here'' with your actual private key). ThefromPrivateKeymethod validates 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 validation was successful.

import ethlib

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

Create 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. Then, we use thefromPrivateKeymethod to generate a new public address for the account.

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

• You can use thecreateNewKeymethod of theEthAccountclass to generate a new private key.

• 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 showed how to compress a public key in hexadecimal format using thefromPrivateKey` method. Using this library, you can easily work with Ethereum accounts and generate new keys or addresses as needed.