//ViewController.swift
...
import CardKitCore
...

type CKCCardParams = {
  pan: string               // card number (without separators and spaces)
  cvc: string
  expiryMMYY: string        // date in MM/YYY or MMYYY format
  cardholder: string | null // if null - not validated
  mdOrder: string | null
  pubKey: string
  seTokenTimestamp: string | null // if null - the sdk gets a smartphone local time
}
type CKCBindingParams = {
  bindingID: string
  cvc: string | null // if null, then it is not validated
  mdOrder: string | null
  pubKey: string
  seTokenTimestamp: string | null // if null - the sdk gets in a smartphone local time
}
type CKCError = 
   | 'invalid-pub-key' // empty or invalid key
   | 'required'        // Required field
   | 'invalid-format'  // invalid data format (for example, numbers in a cardholder)
   | 'invalid-length'  // invalid field length
   | 'invalid'         // invalid field value (general)
type CKCField = 
   | 'pan'
   | 'cvc'
   | 'expiryMMYY'
   | 'cardholder'
   | 'bindingID'
   | 'mdOrder'
   | 'pubKey'
type CKCTokenResult = {
  token: string | null
  errors: [{field: CKCField, error: CKCError }] | null
}
class CKCPubKey {
  // utility for parsing JSON response from public key servers
  static fromJSONString(json: string): string | null
}
class CKCToken {
  static generateWithBinding(params: CKCBindingParams): CKCTokenResult
  static generateWithCard(params: CKCCardParams): CKCTokenResult
  static timestampForDate(NSDate: date): string
}

import CardKitCore
let cardParams = CKCCardParams()
cardParams.cardholder= "Korotkov Alex"
cardParams.expiryMMYY= "1222" // or 12/22
cardParams.pan= "5536913776755304"
cardParams.cvc =  "123"
cardParams.mdOrder =  "mdorder"
cardParams.pubKey =  "-----BEGIN PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoIITqh9xlGx4tWA+aucb0V0YuFC9aXzJb0epdioSkq3qzNdRSZIxe/dHqcbMN2SyhzvN6MRVl3xyjGAV+lwk8poD4BRW3VwPUkT8xG/P/YLzi5N8lY6ILlfw6WCtRPK5bKGGnERcX5dqL60LhOPRDSYT5NHbbp/J2eFWyLigdU9Sq7jvz9ixOLh6xD7pgNgHtnOJ3Cw0Gqy03r3+m3+CBZwrzcp7ZFs41bit7/t1nIqgx78BCTPugap88Gs+8ZjdfDvuDM+/3EwwK0UVTj0SQOv0E5KcEHENL9QQg3ujmEi+zAavulPqXH5907q21lwQeemzkTJH4o2RCCVeYO+YrQIDAQAB-----END PUBLIC KEY-----"
let res = CKCToken.generate(withCard: cardParams);

import CardKitCore
let bindingParams = CKCBindingParams()
bindingParams.bindingID = "das"
bindingParams.cvc = "123"
bindingParams.mdOrder = "mdOrder"
bindingParams.pubKey = "-----BEGIN PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoIITqh9xlGx4tWA+aucb0V0YuFC9aXzJb0epdioSkq3qzNdRSZIxe/dHqcbMN2SyhzvN6MRVl3xyjGAV+lwk8poD4BRW3VwPUkT8xG/P/YLzi5N8lY6ILlfw6WCtRPK5bKGGnERcX5dqL60LhOPRDSYT5NHbbp/J2eFWyLigdU9Sq7jvz9ixOLh6xD7pgNgHtnOJ3Cw0Gqy03r3+m3+CBZwrzcp7ZFs41bit7/t1nIqgx78BCTPugap88Gs+8ZjdfDvuDM+/3EwwK0UVTj0SQOv0E5KcEHENL9QQg3ujmEi+zAavulPqXH5907q21lwQeemzkTJH4o2RCCVeYO+YrQIDAQAB-----END PUBLIC KEY-----"
let res = CKCToken.generate(withBinding: bindingParams)

let JSONWithPubKey = """{
  "keys":[{
    "keyValue":"-----BEGIN PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhjH8R0jfvvEJwAHRhJi2Q4fLi1p2z10PaDMIhHbD3fp4OqypWaE7p6n6EHig9qnwC/4U7hCiOCqY6uYtgEoDHfbNA87/X0jV8UI522WjQH7Rgkmgk35r75G5m4cYeF6OvCHmAJ9ltaFsLBdr+pK6vKz/3AzwAc/5a6QcO/vR3PHnhE/qU2FOU3Vd8OYN2qcw4TFvitXY2H6YdTNF4YmlFtj4CqQoPL1u/uI0UpsG3/epWMOk44FBlXoZ7KNmJU29xbuiNEm1SWRJS2URMcUxAdUfhzQ2+Z4F0eSo2/cxwlkNA+gZcXnLbEWIfYYvASKpdXBIzgncMBro424z/KUr3QIDAQAB-----END PUBLIC KEY-----",
    "protocolVersion":"RSA",
    "keyExpiration":1661599747000
    }
  ]}""";
CKCPubKey.fromJSONString(JSONWithPubKey); // Return "-----BEGIN PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhjH8R0jfvvEJwAHRhJi2Q4fLi1p2z10PaDMIhHbD3fp4OqypWaE7p6n6EHig9qnwC/4U7hCiOCqY6uYtgEoDHfbNA87/X0jV8UI522WjQH7Rgkmgk35r75G5m4cYeF6OvCHmAJ9ltaFsLBdr+pK6vKz/3AzwAc/5a6QcO/vR3PHnhE/qU2FOU3Vd8OYN2qcw4TFvitXY2H6YdTNF4YmlFtj4CqQoPL1u/uI0UpsG3/epWMOk44FBlXoZ7KNmJU29xbuiNEm1SWRJS2URMcUxAdUfhzQ2+Z4F0eSo2/cxwlkNA+gZcXnLbEWIfYYvASKpdXBIzgncMBro424z/KUr3QIDAQAB-----END PUBLIC KEY-----"

    allprojects {
    repositories {
        // ...
        flatDir {
            dirs("libs")
        }
    }
}
dependencies {
    // dependency is mandatory to add
    implementation(group = "", name = "sdk_core-release", ext = "aar")
}

    allprojects {
    repositories {
        // ...
        flatDir {
            dirs 'libs'
        }
    }
}
dependencies {
    // dependency is mandatory to add
    implementation(group: '', name: 'sdk_core-release', ext: 'aar')
}

val publicKey: String =
    "-----BEGIN PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoIITqh9xlGx4tWA+aucb0V0YuFC9aXzJb0epdioSkq3qzNdRSZIxe/dHqcbMN2SyhzvN6MRVl3xyjGAV+lwk8poD4BRW3VwPUkT8xG/P/YLzi5N8lY6ILlfw6WCtRPK5bKGGnERcX5dqL60LhOPRDSYT5NHbbp/J2eFWyLigdU9Sq7jvz9ixOLh6xD7pgNgHtnOJ3Cw0Gqy03r3+m3+CBZwrzcp7ZFs41bit7/t1nIqgx78BCTPugap88Gs+8ZjdfDvuDM+/3EwwK0UVTj0SQOv0E5KcEHENL9QQg3ujmEi+zAavulPqXH5907q21lwQeemzkTJH4o2RCCVeYO+YrQIDAQAB-----END PUBLIC KEY-----"

val context: Context = //android context for getting string resources
val sdkCore: SDKCore = SDKCore(context)
val cardParams: CardParams = CardParams(
    mdOrder = "mdOrder",
    pan = "5536913776755304",
    cvc = "123",
    expiryMMYY = "12/22",
    cardHolder = "Korotkov Alex",
    pubKey = "publicKey"
)
val tokenResult = sdkCore.generationWithCard(cardParams)
val bindingParams: BindingParams = BindingParams(
    mdOrder = "mdOrder",
    bindingID = "das",
    cvc = "123",
    pubKey = "publicKey"
)
val tokenResult = sdkCore.generateWithBinding(bindingParams)

...
    Logger.addLogInterface(object : LogInterface {
        override fun log(classMethod: Class<Any>, tag: String, message: String, exception: Exception?) {
                Log.i(tag, "$classMethod: $message", exception)
            }
        })
...

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

import net.payrdr.mobile.payment.sdk.core.SDKCore
import net.payrdr.mobile.payment.sdk.core.TokenResult
import net.payrdr.mobile.payment.sdk.core.model.BindingParams
import net.payrdr.mobile.payment.sdk.core.model.CardParams
import net.payrdr.mobile.payment.sdk.core.validation.BaseValidator
import net.payrdr.mobile.payment.sdk.core.validation.CardCodeValidator
import net.payrdr.mobile.payment.sdk.core.validation.CardExpiryValidator
import net.payrdr.mobile.payment.sdk.core.validation.CardHolderValidator
import net.payrdr.mobile.payment.sdk.core.validation.CardNumberValidator
import net.payrdr.mobile.payment.sdk.core.validation.OrderNumberValidator
class MainActivity : AppCompatActivity() {
    // initialization of validators for card information entry fields
    private val cardNumberValidator by lazy { CardNumberValidator(this) }
    private val cardExpiryValidator by lazy { CardExpiryValidator(this) }
    private val cardCodeValidator by lazy { CardCodeValidator(this) }
    private val cardHolderValidator by lazy { CardHolderValidator(this) }
    private val orderNumberValidator by lazy { OrderNumberValidator(this) }
    private val sdkCore by lazy { SDKCore(context = this) }
    override fun onCreate(savedInstanceState: Bundle?) {
        // installation of validators on the card information entry fields
        cardNumberInput.setupValidator(cardNumberValidator)
        cardExpiryInput.setupValidator(cardExpiryValidator)
        cardCodeInput.setupValidator(cardCodeValidator)
        cardHolderInput.setupValidator(cardHolderValidator)
        mdOrderInput.setupValidator(orderNumberValidator)
        // creation of an object and initialization of fields for a new card
        val params = CardParams(
            mdOrder = mdOrderInput.text.toString(),
            pan = cardNumberInput.text.toString(),
            cvc = cardCodeInput.text.toString(),
            expiryMMYY = cardExpiryInput.text.toString(),
            cardHolder = cardHolderInput.text.toString(),
            pubKey = pubKeyInput.text.toString()
        )
        // method call to get the cryptogram for a new card
        sdkCore.generateWithCard(params)
        // Creation of an object and initialization of fields for the linked card
        val params = BindingParams(
            mdOrder = mdOrderInput.text.toString(),
            bindingID = bindingIdInput.text.toString(),
            cvc = "123",
            pubKey = pubKeyInput.text.toString()
        )
        // method call to get the cryptogram for the linked card
        sdkCore.generateWithBinding(params)
    }
}