> For the complete documentation index, see [llms.txt](https://developer.magtek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.magtek.com/hardware/card-readers/magnetic-stripe-readers/idynamo-5-gen-iii/documentation/developers-manuals/programmers-manual-ios/mtscra-functions/mtscra-functions-11-20.md).

# MTSCRA Functions - 11 - 20

#### clearBuffers

This function clears the SDK library’s local cache of card swipe data.

> (void) clearBuffers

Parameters: None 

Return Value: None

#### listenForEvents <a href="#id-4.12_listenforevents" id="id-4.12_listenforevents"></a>

This function sets a callback function to notify when the device has card data to send to the host or when the device state changes. See example in Open Device code example.

```
(void) listenForEvents:(UInt32)event
```

Parameters: Event

<table data-header-hidden><thead><tr><th width="114.90911865234375" valign="top"></th><th valign="top"></th></tr></thead><tbody><tr><td valign="top">Parameter</td><td valign="top">Description</td></tr><tr><td valign="top"><p> </p><p> </p><p>event</p></td><td valign="top"><p>Event type.</p><ul><li>TRANS_EVENT_OK = Transaction succeeded.</li><li>TRANS_EVENT_START = Reader started sending data.</li><li>TRANS_EVENT_ERROR = Reader failed sending data.</li></ul></td></tr></tbody></table>

Return Value: None

#### getMaskedTracks \[iDynamo/uDynamo Only] <a href="#id-4.13_getmaskedtracks_-idynamo-udynamo_on" id="id-4.13_getmaskedtracks_-idynamo-udynamo_on"></a>

This function retrieves masked card track data after a cardholder swipes a card. Only available on iDynamo/uDynamo; other devices will return an empty string.

```
(NSString *) getMaskedTracks
```

Parameters: None&#x20;

Return Value:

Return stored masked track data string. Tracks are delimited with start and end sentinels.

#### getTrack1Masked <a href="#id-4.14_gettrack1masked" id="id-4.14_gettrack1masked"></a>

This function retrieves masked track 1 data after a cardholder swipes a card.

```
(NSString *) getTrack1Masked
```

Parameters: None

Return Value: Return stored masked track1 data string.

#### getTrack2Masked <a href="#id-4.15_gettrack2masked" id="id-4.15_gettrack2masked"></a>

This function retrieves masked track 2 data, if any, after a cardholder swipes a card.

```
(NSString *) getTrack2Masked
```

Parameters: None

Return Value: Return stored masked track2 data string.

#### getTrack3Masked <a href="#id-4.16_gettrack3masked" id="id-4.16_gettrack3masked"></a>

This function retrieves masked track 3 data, if any, after a cardholder swipes a card.

```
(NSString *) getTrack3Masked
```

Parameters: None

Return Value: Return stored masked track3 data string.

#### getCardPAN <a href="#id-4.17_getcardpan" id="id-4.17_getcardpan"></a>

This function retrieves masked PAN data, if any, after a cardholder swipes a card.

```
(NSString *) getCardPAN
```

Parameters: None

Return Value: Return stored masked PAN data string.

#### getTrack1 <a href="#id-4.18_gettrack1" id="id-4.18_gettrack1"></a>

This function retrieves the card’s track 1 data in encrypted format after a cardholder swipes a card.

```
(NSString *) getTrack1
```

Parameters: None

Return Value: String containing encrypted track 1 data.

#### getTrack2 <a href="#id-4.19_gettrack2" id="id-4.19_gettrack2"></a>

This function retrieves the card’s track 2 data in encrypted format, if any, after a cardholder swipes a card.

```
(NSString *) getTrack2
```

Parameters: None

Return Value: String containing encrypted track 2 data.

#### getTrack3 <a href="#id-4.20_gettrack3" id="id-4.20_gettrack3"></a>

This function retrieves the card’s track 3 data in encrypted format, if any, after a cardholder swipes a card.

```
(NSString *) getTrack3
```

Parameters: None

Return Value: String containing encrypted track 3 data.q


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