Foundations of Blockchain

Key management

We will implement the generation of a key pair and store the keys in plaintext, that is, without applying any encryption. Although wallets can store multiple keys, which can also be generated by a seed phrase, we will use a single key per wallet in this application to keep the wallet implementation as simple as possible. The following method will read the private key and convert the hexadecimal to byte representation:

PRIV_KEY_LOC = 'private_key' 
from ecdsa import SigningKey 
 
def generate_private_key(): 
    sk = SigningKey.generate(curve=SECP256k1) 
    with open(PRIV_KEY_LOC, 'wt') as file_obj: 
        file_obj.write(binascii.b2a_hex(sk.to_string()).decode()) 

Wallet is initialized by creating a private key using the ecdsa package. The SigningKey ...