Implementation and Completion of the Wallet PIN Module
In this phase of the application’s development, our focus was on designing and implementing the Wallet PIN module—a critical component directly related to user security and protection of digital assets. Below is a structured summary of the work completed and the technical decisions made during this stage.
🎯 Primary Objective
To build a secure, reliable, and user-friendly mechanism for:
- Creating a wallet PIN
- Validating user input
- Securely storing the PIN
- Managing PIN-related states across the application
🔐 Wallet PIN Architecture
- The wallet PIN is defined as a 6-digit numeric code.
- PIN entry is handled through a custom PIN keyboard, preventing unintended or invalid input.
- The PIN is initially collected via a Bottom Sheet, then confirmed and processed on the PIN screen.
✅ Input Validation
To enhance both security and user experience:
- The system validates that the PIN length is exactly 6 digits.
- Incomplete or invalid input triggers clear error messages.
- Progression to the next step is allowed only after successful validation.
🧠 Secure PIN Storage
- The wallet PIN is hashed before being stored in the database.
- The raw (plain-text) PIN is never saved or logged at any stage.
- This approach significantly improves security and protects against unauthorized data access.
🔄 Post-Validation Execution Flow
Once the PIN is successfully entered and validated:
- The PIN is temporarily stored in memory
- A hashing function is executed
- The hashed value is sent to the database
- A success confirmation is displayed to the user
📌 Final Outcome
At the completion of this phase:
- The Wallet PIN module is fully implemented and stable
- Security, usability, and architectural clarity were all prioritized
- The foundation is now in place for future features such as payment confirmation, PIN updates, and advanced wallet security mechanisms
