> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/release-notes/sdk/november-2025/d1-sdk-v4.2.0.md).

# D1 SDK v4.2.0

{% tabs %}
{% tab title="Android" %}

#### Supported Platforms & Processor Architectures <a href="#supported-platforms--processor-architectures" id="supported-platforms--processor-architectures"></a>

* Android 8.0.0 and later.
* Processor architectures: armeabi-v7a, arm64-v8a, x86, x86\_64.

#### Click to Pay <a href="#bug-fixes" id="bug-fixes"></a>

**New features**

* Introduced two new APIs :\
  \- `D1ClickToPay.enrol` ,\
  \- `D1ClickToPay.optOutCard` ,\
  and deprecated the existing `D1PushToECommerce` API that is replaced by the `D1ClickToPay`service.

#### General <a href="#bug-fixes" id="bug-fixes"></a>

**Improvements**

* Supports the use of tokens for multi-issuers and consumer IDs (issuer aggregators) within a single app while maintaining customer isolation.
* Security enhancements for D1 SDK.
* Application is no longer required to have [okhttp](https://square.github.io/okhttp/) as dependency.
  {% endtab %}

{% tab title="iOS" %}

#### Supported Platforms & Processor Architectures <a href="#supported-platforms--processor-architectures" id="supported-platforms--processor-architectures"></a>

* iOS 15 and later.
* Processor architectures: arm64, x86\_64.

#### Click to Pay <a href="#bug-fixes" id="bug-fixes"></a>

**New features**

* Introduced two new APIs :\
  \- `D1ClickToPay.enrol` ,\
  \- `D1ClickToPay.optOutCard` ,\
  and deprecated the existing `D1PushToECommerce` API that is replaced by the `D1ClickToPay`service.

#### General <a href="#bug-fixes" id="bug-fixes"></a>

**Improvements**

* Supports the use of tokens for multi-issuers and consumer IDs (issuer aggregators) within a single app while maintaining customer isolation.
* Security enhancements for D1 SDK.
* Simplify SDK binary to only two xcframework for base flavor. Application is no longer required to have D1Core.xcframework and TPCSDKSwift.xcframework.

**Bug Fixes**

* D1\_SERVICE\_URL is allowed to have extra '/'.
* Fixed Auto Layout constraint warning that appeared at runtime in D1DisplayTextField.

**Known Issues**

When multiple iOS applications enable keychain sharing within the same group, only one application will function correctly. The remaining applications may experience problems when using either 3DS features or Messaging Service.
{% endtab %}
{% endtabs %}


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