alice.deposit(100) print(alice.pay(30, bob))
We all use e-wallets daily. Tap your phone, scan a QR code, or send money to a friend—it feels like magic. But as a developer, I know there’s a lot more happening under the hood. e wallet code
import hashlib import uuid from datetime import datetime class SimpleWallet: def (self, user_id): self.user_id = user_id self.balance = 0.0 self.transactions = [] scan a QR code
print(f"Alice balance: $alice.balance") print(f"Bob balance: $bob.balance") e wallet code