Skip to content

Embedded Systems Professional Nanodegree Payment Application Project

Notifications You must be signed in to change notification settings

FahdSeddik/ESND-Payment-Application

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

18 Commits
 
 
 
 
 
 

Repository files navigation

Payment Application Simulation

This is a Payment Application Simulation project for the EgFWD Embedded Systems Professional NanoDegree Scholarship. This project was written in C. It includes a Luhn card PAN generation and validation.

Program Flow Chart

payment-flowchart

Functions

These are some of the functions I thought I should highlight:

  • appStart() : this would be called in Main.c to start the application
  • getTransactionDate() : asks for a date in the form DD/MM/YYYY or can retrieve System Date automatically
  • getCardPAN() : this functions asks either to generate a Luhn valid card PAN or enter manually
    • Uses GenerateLuhn() which essentially applies the Luhn algorithm to generate the card PAN
  • readAccountDB() : this load the accounts database from the database file (read database section)
  • saveTransaction() : saves APPROVED transactions with all details into the transactions database (read database section)

Instructions

  • You would find demonstrated test cases in the "Submission Files/User Stories" Folder.
  • This demonstrates how someone would use the Simulator.
  • The test cases describe different scenarios that would happen:
    • EXCEED_MAX_AMOUNT : means that the user tried to make a transaction with more than specified max amount for card
    • DECLINED_STOLEN_CARD & INVALID_ACCOUNT : the card number is not present in the account database for the bank
    • DECLINED_INSUFFECIENT_FUND : transaction amount is greater than account balance
    • APPROVED : the transaction was successful and saved to transactions database

Databases

  • AccountsDB.txt : has all accounts PAN (Primary Account Number) and accounts balance image
  • TransactionsDB.txt : this stores different data about the transaction (shown in the picture below) image

Releases

No releases published

Packages

No packages published

Languages