E Wallet Code 'link' Instant

self._log_transaction("SEND", amount, recipient_wallet.user_id) recipient_wallet._log_transaction("RECEIVE", amount, self.user_id)

self.balance -= amount recipient_wallet.balance += amount e wallet code

alice.deposit(100) print(alice.pay(30, bob)) scan a QR code

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. counterparty=None): txn = "id": str(uuid.uuid4())

def _log_transaction(self, txn_type, amount, counterparty=None): txn = "id": str(uuid.uuid4()), "type": txn_type, "amount": amount, "timestamp": datetime.utcnow().isoformat(), "counterparty": counterparty, "balance_after": self.balance self.transactions.append(txn) alice = SimpleWallet("alice_123") bob = SimpleWallet("bob_456")

return f"Sent $amount to recipient_wallet.user_id"