0x7678 / javacard-simple-wallet

Simple Wallet

This is a simple wallet simply maintains a running account balance allowing you to credit, debit, or review the current balance of the wallet. This is simply for pure demonstration on various wearable technologies where a javacard secure element is available.

A very simple wallet client has been created to show a simple interaction with the wallet.

Installation

simplewallet.cap is provided for installation on a javacard enabled secure element through whatever provisioning tools you have available.

Information

Applet AID

F000A0000E00

Usage

Before any operation, the applet must be selected throught the following APDU command:

00A4040006F000A0000E0000

Get Balance

Request APDU

B050000002

• If 0x9000 successful response, the balance is returned in response data.

Increment Balance

B040000001[AMOUNT, 1 Bytes]

• Note: The wallet is not currently implemented to protect against a max balance of 32767.

Sample, increase balance by 5:

B04000000105

Decrease Balance

B030000001[AMOUNT, 1 Bytes]

• If 0x9000 successful response, the balance has been reduced by the specified amount.
• If 0xFF85 failed response, the current balance is not enough for the specified amount.

Sample, decrease balance by 5:

B03000000105