self._log_transaction("SEND", amount, recipient_wallet.user_id) recipient_wallet._log_transaction("RECEIVE", amount, self.user_id)
alice.deposit(100) print(alice.pay(30, bob)) 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 = [] self.user_id) alice.deposit(100) print(alice.pay(30
Want to go deeper? Try building a simple wallet with and add a mock payment gateway. You’ll learn more than any tutorial can teach. Have you built a payment or wallet system before? What was your biggest technical challenge? Let me know in the comments. scan a QR code
self.balance -= amount recipient_wallet.balance += amount
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.