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The watt.ma application works with a prepaid wallet in dirhams (MAD). You top up your balance from the app, then each charging session is automatically debited at the end. This page covers wallet management, supported payment methods, and how tokenization works.

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Prepaid Wallet

Your wallet balance is visible at all times on the Charge screen and on your Profile.
  • Currency: Moroccan dirham (MAD).
  • Balance automatically debited at the end of each session, based on the power delivered and the station’s pricing.
  • Instant top-up from a saved payment method.
  • Shortcuts offered: 50 MAD, 100 MAD, 200 MAD, 500 MAD, or a custom amount.
The wallet may display an initial demo balance when the app runs in Mock Mode. See the Installation page to disable this mode.

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Payment Methods

Payment Methods screen in the watt.ma app From Profile → Payment Methods, you can:
  • Add a Visa or Mastercard.
  • Set a default card for top-ups.
  • Remove a saved card.
The app only displays the last 4 digits and the expiry date. The full card number is never stored on the device.
In Mock Mode, a demo card VISA •••• 4242 is preloaded to test the flow without configuring Stripe.

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Tokenization and Security

  • Stripe: tokenization of international cards via the Stripe client SDK. The Stripe key is provided by EXPO_PUBLIC_STRIPE_PUBLISHABLE_KEY and STRIPE_SECRET_KEY on the FastAPI backend.
  • CMI (Centre Monétique Interbancaire): integration planned for tokenization of locally issued Moroccan bank cards. See the Roadmap.
  • No card number is stored in MongoDB: only Stripe/CMI tokens and the last 4 digits are kept.

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Top Up the Wallet

1

Open the wallet

From the Charge or Profile screen, tap the wallet balance.
2

Choose an amount

Select a shortcut (50, 100, 200, 500 MAD) or enter a custom amount.
3

Select a payment method

The app offers your default card. You can choose another or add a new one.
4

Confirm

The balance is updated immediately after payment confirmation.

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Billing