4. Introduction
QR code-based payment is a digital payment method that
allows customers to make payments by scanning a QR
code using their smartphone. This method has become
increasingly popular in recent years as it offers a quick,
secure, and convenient way to make payments. In this
document, we will define the requirements for
implementing a QR code-based payment system.
5. Requirements:
• Functional Requirements:
• 1. The system should generate a unique QR code for each
transaction.
• 2. The QR code should contain information about the
merchant, the payment amount, and the transaction
details.
• 3. The system should support multiple payment methods
such as credit cards, debit cards, and mobile wallets.
• 4. The system should validate the payment information
entered by the customer.
• 5. The system should process the payment and provide a
confirmation to the customer and merchant.
• Non-Functional Requirements:
• 1. The system should be secure and protect customer data
using encryption technology.
• 2. The system should be reliable and available 24/7 with
minimal downtime.
• 3. The system should be scalable and able to handle many
transactions.
• 4. The system should be user-friendly and easy to navigate
for customers and merchants.
• 5. The system should comply with relevant regulations and
standards such as PCI DSS and GDPR.
6. Steps to Execute
• Start --> Input Data --> Select QR code
type --> Enter Payment Amount -->
Generate Payment QR code --> Display
Payment QR code --> Scan QR code with
Payment App --> Enter Payment
Information --> Confirm Payment -->
Payment Completed --> Display
Confirmation Message --> End!
7. Here's a breakdown of each step in more detail:
• 1. Start: This is the beginning of the flow chart.
• 2. Input Data: This is where the user inputs the
data that they want to encode in the QR code,
such as a product name, description, or other
information.
• 3. Select QR code type: The user selects the
type of QR code they want to generate, such as
a standard QR code or a custom designed QR
code.
8. • 4. Enter Payment Amount: The user enters the payment amount they
want to charge for the product or service.
• 5. Generate Payment QR code: The QR code generator uses an algorithm
to convert the payment amount and other data into a payment QR code.
• 6. Display Payment QR code: The generated payment QR code image is
displayed on the screen or saved as a file.
• 7. Scan QR code with Payment App: The customer uses a payment app
to scan the QR code displayed on the screen.
9. • 8. Enter Payment Information: The payment app prompts the customer to enter their payment
information, such as credit card details or other payment methods.
• 9. Confirm Payment: The customer confirms the payment information and submits the
payment.
• 10. Payment Completed: The payment app confirms that the payment has been completed.
• 11. Display Confirmation Message: The QR code generator displays a confirmation message to
the user, indicating that the payment has been received.
• 12. End: This is the end of the flow chart.
10. Conclusion
• A QR code-based payment system
provides a quick, secure, and
convenient way for customers to make
payments. By implementing the
requirements outlined in this
document, we can develop a robust
and scalable system that meets the
needs of customers and merchants.
