The Casino Gaming Platform uses a virtual currency system that allows users to deposit funds using real money. The payment processing is handled by Stripe, a secure and widely trusted payment provider.

Architecture

┌─────────────┐     ┌─────────────┐     ┌─────────────┐
│             │     │             │     │             │
│  Frontend   │◄───►│  Backend    │◄───►│   Stripe    │
│  (Angular)  │     │ (Spring)    │     │             │
│             │     │             │     │             │
└─────────────┘     └─────────────┘     └─────────────┘
                          │
                          ▼
                    ┌─────────────┐
                    │             │
                    │  Database   │
                    │             │
                    └─────────────┘

Virtual Currency System

Currency Details

Name: Casino Coins (CC)
Exchange Rate: 1 USD = 100 CC
Minimum Deposit: 5 USD (500 CC)
Maximum Deposit: 1000 USD (100,000 CC) per transaction

Balance Management

User balances are stored in the database
Transactions are logged for all balance changes
Balances are updated in real-time
History is accessible to users

Payment Flow

Deposit Process

Initiation:
- User selects "Deposit" from the navigation menu
- User enters desired deposit amount
- Frontend sends request to create a payment session

Session Creation:

POST /api/deposits/create-session
{
  "amount": 1000  // Amount in cents (10 USD)
}

Stripe Integration:
- Backend creates a Stripe Checkout Session
- Backend returns session ID to frontend
```
{
  "sessionId": "cs_test_a1b2c3d4..."
}
```
Payment UI:
- Frontend redirects to Stripe Checkout
- User enters payment information
- Stripe processes the payment
Completion:
- On successful payment, Stripe redirects to success URL
- Backend receives webhook notification from Stripe
- Backend verifies payment and updates user balance
- User receives confirmation and updated balance

Webhook Handling

Stripe webhooks are used to provide reliable payment status updates:

The backend listens for checkout.session.completed events
When received, the webhook handler:
- Verifies the webhook signature
- Checks payment status
- Updates the user's balance
- Records the transaction

Transaction Types

The system records the following transaction types:

Deposit: Adding funds to the account
Bet: Placing a bet in a game
Win: Receiving winnings from a game
Bonus: Receiving promotional or bonus funds
Refund: Receiving a refund for a failed transaction

Transaction Record

Each transaction includes:

Unique transaction ID
User ID
Transaction type
Amount
Previous balance
New balance
Timestamp
Reference ID (e.g., game session ID, Stripe payment ID)
Status (Pending, Completed, Failed)

Security Measures

Payment Data Protection

No credit card information is stored on our servers
All payment processing is handled by Stripe
PCI compliance is maintained by using Stripe Elements
All communication with Stripe uses TLS encryption

Transaction Verification

All balance updates require verification
Double-entry accounting system to prevent errors
Automated reconciliation processes
Regular audits of transaction records

Fraud Prevention

Rate limiting for deposit attempts
Suspicious activity monitoring
IP verification
Device fingerprinting
Transaction amount limits

Testing the Payment System

Test Mode

During development and testing, Stripe's test mode is used:

Use Stripe test cards (e.g., 4242 4242 4242 4242)
Test webhooks using the Stripe CLI
Verify transaction records in the database

Test Cards

Card Number	Description
4242 4242 4242 4242	Successful payment
4000 0000 0000 0002	Declined payment
4000 0000 0000 9995	Insufficient funds
4000 0027 6000 3184	3DS authentication

User Interface

Deposit Page

The deposit page includes:

Deposit amount input
Currency conversion display
Payment method selection
Transaction history
Current balance display

Transaction History

Users can view their transaction history including:

Date and time of each transaction
Transaction type
Amount
Status
Associated game (for bets and wins)

Reporting and Analytics

Administrative Reports

The system provides the following reports:

Daily Transaction Summary:
- Total deposits
- Total withdrawals (if implemented)
- Net change in system balance
User Activity Report:
- Top depositors
- Deposit frequency
- Average deposit amount
Payment Method Analysis:
- Breakdown by payment method
- Success/failure rates
- Processing time averages

Compliance and Regulations

Legal Requirements

The payment system complies with:

Anti-Money Laundering (AML) regulations
Know Your Customer (KYC) requirements
Data protection laws (GDPR, CCPA)
Local gambling regulations where applicable

Record Keeping

Transaction records are maintained for the legally required period
User verification documents are securely stored
Access to payment data is strictly controlled and audited

Troubleshooting

Common Issues

Failed Payments:
- Check Stripe Dashboard for error details
- Verify webhook delivery
- Check for rate limiting or security blocks
Balance Discrepancies:
- Review transaction logs
- Check for pending transactions
- Verify webhook processing
Session Expiration:
- Stripe sessions expire after 24 hours
- Create a new session if expired

Support Process

For payment-related issues:

User reports issue through support interface
Support team accesses transaction logs
Issue is categorized and assigned
Resolution is communicated to user
System improvements are made if needed

Future Enhancements

Planned improvements to the payment system:

Additional Payment Methods:
- PayPal integration
- Cryptocurrency support
- Local payment methods
Withdrawal System:
- Ability to cash out virtual currency
- Verification processes
- Payout method selection
Subscription Model:
- Premium tier with monthly subscription
- Subscriber benefits and bonuses
- Automatic renewal handling