> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/psdk/not-sure-where-these-live/migration.md).

# Migration

Please reference pos-getting-started for a description and examples of the initialization process in 3.x, eg. using “Payment.create()” vs. “new Payment” to create objects, and importing “com.verifone.payment\_sdk.Payment” vs. “com.verifone.commerce.entities.Payment”.

Note

* On CM5 and Trinity terminals, please set Device Manager > Transaction Options > Terminal.1 > UseDeveloperSDK to “0” in order to use the 3.x SDK.

## API Changes <a href="#api-changes" id="api-changes"></a>

* Status Session ID has moved to Commerce Event.
* TransactionManager.getTransactionManager has moved to PaymentSdk.getTransactionManager().
* [TransactionManager.TearDown()](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_transaction_manager_8java.md) has been removed and is no longer accessible as a TransactionManager API.

## Migration from CommerceListener and PsdkStatusListener to CommerceListenerAdapter <a href="#migration-from-commercelistener-and-psdkstatuslistener-to-commercelisteneradapter" id="migration-from-commercelistener-and-psdkstatuslistener-to-commercelisteneradapter"></a>

* [CommerceListener](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_commerce_listener2_8java.md) and [PsdkStatusListener](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_psdk_status_listener_8java.md) are being deprecated and consolidated into a single listener [CommerceListenerAdapter](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_commerce_listener_adapter_8java.md). The old and new listeners and the respective APIs should not be used in conjunction.

To use the new CommerceListener :

* create [CommerceListenerAdapter](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_commerce_listener_adapter_8java.md)
* Use the API [PaymentSdk.initializeFromValues(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_8java.md) with this listener.
* Get the [TransactionManager](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_transaction_manager_8java.md) using [PaymentSdk.getTransactionManager(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_8java.md)
* To Login to the terminal Create the login credentials and call [TransactionManager.loginWithCredentials()](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_transaction_manager_8java.md)
* To start a session call [TransactionManager.startSession2(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_transaction_manager_8java.md)

See also

* [Connection to Payment Application](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/pos_guide.html#initialize-payment-sdk).
* login-logout.
* start-session.

Note

* Make sure to use the CommerceListenerAdapter with New APIs only. Using deprecated APIs in conjunction with CommerceListenerAdapter or the other way might lead to unexpected behaviour.

## API Changes <a href="#id1" id="id1"></a>

* [PaymentSdk.initialize(PsdkStatusListener)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_base_8java.md) API is replaced with [PaymentSdk.initialize(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_base_8java.md)
* [PaymentSdk.initializeFromValues(PsdkStatusListener,HashMap)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_base_8java.md) API is replaced with [PaymentSdk.initializeFromValues(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_base_8java.md)
* [PaymentSdk.initializeFromFile(PsdkStatusListener,String)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_base_8java.md) API is replaced with [PaymentSdk.initializeFromFile(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_base_8java.md)
* [PaymentSdk.displayConfiguration(PsdkStatusListener)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_base_8java.md) API is replaced with [PaymentSdk.displayConfiguration(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_payment_sdk_base_8java.md)
* [TransactionManager.startSession(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_transaction_manager_8java.md) has moved to [TransactionManager.startSession2(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_transaction_manager_8java.md)
* [TransactionManager.Login(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_transaction_manager_8java.md) has moved to [TransactionManager.loginWithCredentials(…)](https://github.com/iKettles/verifone-migration-test/blob/main/psdk/_generated/java/file/_transaction_manager_8java.md)


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