Ethereum: Verify private key and generate 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 how to compress the 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: <

For this example, we will use the eth library, 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

Verify private key with Python

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 ethlib library. We then create an instance of the EthAccount class with our private key in hexadecimal format (replace your_private_key_hex_here with your actual private key). The fromPrivateKey method verifies the private key and returns an account object.

The publicKey.hex() attribute returns a compressed hexadecimal representation of the public key. We print this value to check if the verification was successful.

Generate public address

import ethlib

Choose the private key (replace it 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 EthAccount class with our private key. Then we generate a new public address for the account using the fromPrivateKey method.

The publicKey.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).

Tips and Variations

• Be sure to replace the placeholder values ​​​​in the code with your own private key.

• To generate a new private key, you can use the “createNewKey” method of the “EthAccount” class.

• You can also use the “printAddress” attribute of the “EthAccount” object to get the public address as a string.

Conclusion

In this article, we explored how to verify a private key using Python and generate a public address. We showed how to compress the public key in hexadecimal format using the “fromPrivateKey” method. This library allows you to easily work with Ethereum accounts and generate new keys or addresses when needed.