Ethereum: Private Key Verification and Public Address Generation 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 show how to compress the public key into 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, 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

Verify the private key with Python

import ethlib









Choose a private key (replace with yours)
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 using 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 verify that the verification was successful.

Generate a public address

import ethlib

Choose 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 EthAccount class using our private key. We then 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

• Make 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 demonstrated how to compress the public key into hexadecimal format using the fromPrivateKey method. With this library, you can easily work with Ethereum accounts and generate new keys or addresses as needed.

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