eslam-khalil-88 / Payment-Application

Payment Application including a card component, server and terminal components for making transactions by a client.

Payment-Application

Payment Application including a card component, server and terminal components for making transactions by a client.

System Architecture

• System consists of 3 main modules: Card Module, Terminal Module and Server Module.
• Card module represents all methods and variables related to the card such as: Card Holder name, Card PAN number and card expiry date.
• Terminal module for the methods taking card data and processing it for making transaction: get transaction date, Checking validity of card, Checking card expiry date, specifying maximum amount of transaction and specifying the amount of transaction required by client.
• Server module responsible for checking the client's account on server database, check the availabilty of client's account, getting transaction information from terminal and saving the transaction process.

Functions and variables used in the application

Card Module

• EN_cardError_t getCardHolderName(ST_cardData_t *cardData);

• EN_cardError_t getCardExpiryDate(ST_cardData_t *cardData);

• EN_cardError_t getCardPAN(ST_cardData_t *cardData);

Terminal Module

• EN_terminalError_t getTransactionDate(ST_terminalData_t *termData);

• EN_terminalError_t isCardExpired(ST_cardData_t cardData, ST_terminalData_t termData);

• EN_terminalError_t isValidCardPAN(ST_cardData_t *cardData);

• EN_terminalError_t getTransactionAmount(ST_terminalData_t *termData);

• EN_terminalError_t isBelowMaxAmount(ST_terminalData_t *termData);

• EN_terminalError_t setMaxAmount(ST_terminalData_t *termData);

Server Module

• EN_transState_t recieveTransactionData(ST_transaction_t *transData);

• EN_serverError_t isValidAccount(ST_cardData_t *cardData);

• EN_serverError_t isAmountAvailable(ST_trminalData_t *termData);

• EN_serverError_t saveTransaction(ST_transaction_t *transData);

• EN_serverError_t getTransaction(uint32_t transactionSequenceNumber, ST_transaction_t *transData);