import UIKit
import ThreeDSSDK
....
var _service: ThreeDS2Service = Ecom3DS2Service()
// Init ThreeDS SDK
try _service.initialize(configParameters: ConfigParameters(), locale: Locale.current.languageCode, uiCustomization: _setUpTheme())
var _sdkTransaction = try _service.createTransaction(directoryServerID: "", messageVersion: nil, publicKeyBase64: "", rootCertificateBase64: "", logoBase64: "")
// get progress view
var _sdkProgressDialog = try _sdkTransaction!.getProgressView()
// Show progress dialog
_sdkProgressDialog?.show()
// get authentication request parameters, to be sent to the payment gateway
var authParameters = _sdkTransaction!.getAuthenticationRequestParameters()
var deviceData = authParameters.getDeviceData()
var ephemeralPublickKey = authParameters.getSDKEphemeralPublicKey()
var threeDSSDKAppId = authParameters.getSDKAppID()
var threeDSSDKTransId = authParameters.getSDKTransactionID()
// if you get error during initial sdk, you can close spinner.
// _sdkProgressDialog?.close()
// Set challenge parameters and start challenge flow
let challengeParameters = ChallengeParameters()
challengeParameters.setAcsSignedContent("acsSignedContent")
challengeParameters.setAcsRefNumber("acsReferenceNumber")
challengeParameters.setAcsTransactionID("acsTransID")
challengeParameters.set3DSServerTransactionID("threeDSServerTransID")
// Start challenge flow
self._sdkTransaction?.doChallenge(challengeParameters: challengeParameters, challengeStatusReceiver: self, timeOut: 5)
// If you get error during sdk flow, you can finish sdk transaction
// _sdkTransaction?.close()
// Delegate functions
extension TransactionManager: ChallengeStatusReceiver {
  public func completed(completionEvent e: CompletionEvent) {}
  public func cancelled() {}
  public func timedout() {}
  public func protocolError(protocolErrorEvent e: ProtocolErrorEvent) {}
  public func runtimeError(runtimeErrorEvent: RuntimeErrorEvent) {}
}

...
     ThreeDSLogger.INSTANCE.addLogInterface(object : net.payrdr.mobile.payment.sdk.threeds.LogInterface {
        override fun log(classMethod: Class<*>, tag: String, message: String, p3: Throwable?) {
            Log.i(tag, "$classMethod: $message")
        }
    })
...

...
     ThreeDSLogger.INSTANCE.log(this.javaClass, "MyTag", "My process", null)
...

    allprojects {
    repositories {
       // ...
       flatDir {
          dirs("libs")
       }
    }
}
dependencies {
   // dependency for connecting the confirmation functionality via 3DS
   implementation(group = "", name = "sdk_threeds-release", ext = "aar")
   implementation("com.google.code.gson:gson:2.8.5")
   implementation("com.squareup.okhttp3:okhttp:3.11.0")
   implementation("com.google.android.gms:play-services-ads:17.2.1")
   implementation("com.google.android.gms:play-services-location:16.0.0")
}

    allprojects {
    repositories {
       // ...
       flatDir {
          dirs 'libs'
       }
    }
}
dependencies {
   // dependency for connecting the confirmation functionality via 3DS
   implementation(group = "", name = "sdk_threeds-release", ext = "aar")
   implementation("com.google.code.gson:gson:2.8.5")
   implementation("com.squareup.okhttp3:okhttp:3.11.0")
   implementation("com.google.android.gms:play-services-ads:17.2.1")
   implementation("com.google.android.gms:play-services-location:16.0.0")
}

private val factory = Factory()
threeDS2Service = factory.newThreeDS2Service()
val configParams = factory.newConfigParameters()
val uiCustomization = factory.newUiCustomization()
threeDS2Service.initialize(
    context,
    configParams,
    "en-US",
    uiCustomization,
    sslContext, // Optional field (needs if you want to pass a custom SSL certificate)
    trustManager, // Optional field (needs if you want to pass a custom SSL certificate)
)
// An example of creating a transaction with custom SSL certificate.
// To create a transaction with a custom certificate, you need to create an SSLContext object and a TrustManager. 
// Then pass it to initialize method of threeDS2Service.
// Both (sslContext and trustManager) parameters must be passed, or neither (they are optional).
//
// threeDS2Service.initialize(
//    context,
//    configParams,
//    "en-US",
//    uiCustomization,
//    sslContext, // Optional field
//    trustManager, // Optional field
// )
val dsRoot: String = "MII346GU349HDE5FH..." //your root-certificate in base64 format
val transaction = threeDS2Service.createTransaction("F000000000", "", "2.1.0", dsRoot)
//  An example of creating a transaction with deviceInfo encryption with a transmitted RSA key.
//  val rsaPem: String = ...
//  val dsRoot: String = ...
//  transaction = threeDS2Service.createTransaction(
//      "",
//      rsaPem,
//      "2.1.0",
//      dsRoot
//   )
//  An example of creating a transaction with deviceInfo encryption with a transmitted EC key.
//  val ecPem: String = ...
//  val directoryServerID: String = ...
//  val dsRoot: String = ...
//  transaction = threeDS2Service.createTransaction(
//      directoryServerID,
//      ecPem,
//      "2.1.0",
//      dsRoot
//   )
// Available data, to be sent to the payment gateway
val authRequestParams = transaction.authenticationRequestParameters!!
val encryptedDeviceInfo: String = authRequestParams.deviceData
val sdkTransactionID: String = authRequestParams.sdkTransactionID
val sdkAppId: String = authRequestParams.sdkAppID
val sdkEphmeralPublicKey: String = authRequestParams.sdkEphemeralPublicKey
val sdkReferenceNumber: String = authRequestParams.sdkReferenceNumber
val challengeParameters = factory.newChallengeParameters()
// Parameters for starting Challenge Flow.
challengeParameters.acsTransactionID =
    paymentOrderSecondStepResponse.threeDSAcsTransactionId
challengeParameters.acsRefNumber = paymentOrderSecondStepResponse.threeDSAcsRefNumber
challengeParameters.acsSignedContent =
    paymentOrderSecondStepResponse.threeDSAcsSignedContent
challengeParameters.set3DSServerTransactionID(paymentOrderResponse.threeDSServerTransId)
// Listener to handle the Challenge Flow execution process.
val challengeStatusReceiver: ChallengeStatusReceiver = object : ChallengeStatusReceiver {
    override fun cancelled() {}
    override fun protocolError(protocolErrorEvent: ProtocolErrorEvent) {}
    override fun runtimeError(runtimeErrorEvent: RuntimeErrorEvent) {}
    override fun completed(completionEvent: CompletionEvent) {}
    override fun timedout() {}
}
val timeOut = 5
// Starting Challenge Flow.
transaction.doChallenge(
    activity,
    challengeParameters,
    challengeStatusReceiver,
    timeOut
)

val factory = Factory()
val threeDS2Service = factory.newThreeDS2Service()
val configParams = factory.newConfigParameters()
val trustedAppStores = listOf<String>("com.android.vending", "com.huawei.appmarket")
configParams.removeParam("security", "trustedAppStores")
configParams.addParam("security", "trustedAppStores", StringUtils.makeString(trustedAppStores))

val factory = Factory()
val threeDS2Service = factory.newThreeDS2Service()
val configParams = factory.newConfigParameters()
val youAppSignature = //signature of your application
    configParams.removeParam("security", "appSignature")
configParams.addParam("security", "appSignature", youAppSignature)

val factory = Factory()
val threeDS2Service = factory.newThreeDS2Service()
val configParams = factory.newConfigParameters()
val maliciousApps = listOf<String>("com.zhiliaoapp.musically", "com.othersapp.harmful")
configParams.removeParam("security", "maliciousApps")
configParameters.addParam("security", "maliciousApps", StringUtils.makeString(maliciousApps))