ePurse
Purpose and description of the example
This example illustrates:
- How to develop Java Card Applets in Developer Suite
- How to test this type of applet using JCardManager as a client application.
This applet is a simple electronic purse applet that supports the following APDU commands:
- Get Balance
- Debit
- Credit
Here is the definition of these APDU Commands:
| Get Balance | |||||||
|---|---|---|---|---|---|---|---|
| Description: This command allows you to read the purse balance. | |||||||
| CLA | INS | P1 | P2 | Lc | Data In | Le | Data Out |
| 90 | 10 | 00 | 00 | 00 | - | 02 | Balance |
| Debit | |||||||
|---|---|---|---|---|---|---|---|
| Description: This command allows you to debit the purse balance. | |||||||
| CLA | INS | P1 | P2 | Lc | Data In | Le | Data Out |
| 90 | 12 | 00 | 00 | 02 | Amount to be debited | 02 | Updated balance |
| Credit | |||||||
|---|---|---|---|---|---|---|---|
| Description: This command allows you to credit the purse balance. | |||||||
| CLA | INS | P1 | P2 | Lc | Data In | Le | Data Out |
| 90 | 14 | 00 | 00 | 02 | Amount to be credited | 02 | Updated balance |
How to download the applet?
In order to download and test the applet:
- On a card simulator: After importing the ePurse Project in Developer Suite, run it in debug. This will automatically:
- Launch the Card Simulator
- Load the STK Commands Applet
- Start the JCardManager
- On a real card: After importing the ePurse Project in Developer Suite, you will have to manually:
- Run the ePurse Applet load script: ePurse_load.gxsc
- Start the JCardManager from the ‘Developer Suite’ menu
How to test the applet
We will use JCardManager as a client application for testing and debugging this applet.
Selecting the ePurse Applet
Before we issue any APDU to our Applet, let’s first select it.
Its AID is A000000018FF00000000000000000102
Issuing APDU Commands to the ePurse Applet
Now, we may issue the GetBalance, Credit and Debit APDU to the Applet.
You may either create the APDU Commands by yourself or run the APDU_Commands.atf script available in the Project, both using the JCardManager.
Files
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