# activateActivationKeyBuffer static method

Uint8List activateActivationKeyBuffer(

1. String? hardwareCode,
2. String? activationKey,
3. String? commentary

)

Activates a license using an activation key and returns the license in a data buffer.

param hardwareCode The hardware code on which the license file will be attached, to be retrieved using the GetHostHardwareCode function. param activationKey The id3 activation key. param commentary Commentary associated to this license activation. return The license data buffer. throws FaceException An error has occurred during Face Library execution.

## Implementation

    static Uint8List activateActivationKeyBuffer(String? hardwareCode, String? activationKey, String? commentary) {
      Pointer<Char>? pHardwareCode = hardwareCode?.toNativeUtf8().cast<Char>();
      Pointer<Char>? pActivationKey = activationKey?.toNativeUtf8().cast<Char>();
      Pointer<Char>? pCommentary = commentary?.toNativeUtf8().cast<Char>();
      Pointer<UnsignedChar> pLicenseFileBuffer = calloc.allocate(2048);
      Pointer<Int> pLicenseFileBufferSize = calloc.allocate(1);
      pLicenseFileBufferSize[0] = 2048;
      try {
        var err = faceSDK.id3FaceLicense_ActivateActivationKeyBuffer(pHardwareCode ?? nullptr, pActivationKey ?? nullptr, pCommentary ?? nullptr, pLicenseFileBuffer, pLicenseFileBufferSize);
        if (err == FaceError.insufficientBuffer.value) {
          calloc.free(pLicenseFileBuffer);
          pLicenseFileBuffer = calloc.allocate(pLicenseFileBufferSize.value);
          err = faceSDK.id3FaceLicense_ActivateActivationKeyBuffer(pHardwareCode ?? nullptr, pActivationKey ?? nullptr, pCommentary ?? nullptr, pLicenseFileBuffer, pLicenseFileBufferSize);
        }
        if (err != FaceError.success.value) {
          throw FaceException(err);
        }
        final vLicenseFileBuffer = Uint8List.fromList(pLicenseFileBuffer.cast<Uint8>().asTypedList(pLicenseFileBufferSize.value));
        return vLicenseFileBuffer;
      } finally {
        if (pHardwareCode != null) {
          calloc.free(pHardwareCode);
        }
        if (pActivationKey != null) {
          calloc.free(pActivationKey);
        }
        if (pCommentary != null) {
          calloc.free(pCommentary);
        }
        calloc.free(pLicenseFileBuffer);
        calloc.free(pLicenseFileBufferSize);
      }
    }