Ethereum Python Library

==

Introduction

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In this article, we will create a basic Ethereum library in Python that provides functions for generating EC (Elliptic Curve) private key pairs, retrieving private and public keys, signing messages, and verifying signatures.

Library Code

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We will use the “cryptography” library, which is a popular and well-maintained library for cryptographic tasks in Python. We also use the “hmac” library to generate MAC (Message Authentication Code) codes for the Ethereum blockchain.

Installation

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To install the required libraries, run the following commands:

pip install cryptography

Library Code:

imported
from cryptography.hazmat.primitives import serialization
from ec import cryptography.hazmat.primitives.asymmetric
from: cryptography.hazmat.backends import default_backend
import base64
EthereumLibrary class:
def __init__(self, private_key=None):
if private_key:
self.private_key = private_key
Other:





Create a new EC key pair for each library instance
self.private_key = ec.generate_private_key(ec.SECP256K1(), default_backend())
def generate_ec_keypair(self, private_key=None):
if private_key is None:
private_key = self.private_key
return ec.generate_private_key(private_key, default_backend())
def get_private_key(self):
return self.private_key
def get_public_key(self):
return self.private_key.public_key()
def sign_message(self, message, public_key):
signature = public_key.sign(
message,
ec.dhparams(),
asymmetric signature algorithm. SHA256()
)
return base64.b32encode(signature)
def verify_signature(self, message, signature, private_key):
try:
public_key = self.private_key.public_key()
public_key.verify(
signature,
message,
asymmetric VerifyingKey.dhparam(),
)
return True
except:
return False

Example usage:
library = EthereumLibrary()

Create a new EC key pair for each library instance
keypair = library.generate_ec_keypair()
private_key = library.get_private_key().public_bytes(
encoding = serialization.Encoding.PEM,
format = serialization.PrivateFormat-Trustless,
encryption_algorithm=serialization.NoEncryption()
)

Sign message with public key
message = b"Hello world!"
signature = library.sign_message(message, keypair.public_key())
print(library.get_private_key().public_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PublicFormat.SubjectPublicKeyInfo
))

Verify signature with private key
private_key.verify(
b"\x00\x01\x02\x03", 
Signature
b"Hello world!", 
Message
keypair.private_key
)

Please note that this is a simplified example and should not be used in a production environment without further testing and verification. Also note that creating an EC key pair for each library instance consumes a significant amount of memory.

Finalizing messages

——————

Follow general professional guidelines for final messages:

• Use prompt mode (e.g. “feat: add Ethereum library”)

• Keep the first line short (<72 characters)

• Use present tense (e.g. “Add new generation EC key pair”)

Example commit message:

Added Ethereum core library in Python

ETHEREUM EVENTS WITH