KonadBuyInfo.kt

import io.konad.*

data class BuyCryptoInfo(
  val username: String,
  val phoneNumber: PhoneNumber,
  val creditCard: CreditCard,
  val kycVerification: KycVerificationData){

  companion object{
      // If you want to go for errors
      fun from1(user: CryptoUser): Result<BuyCryptoInfo> = with(user){
            ::BuyCryptoInfo +
                username +
                phoneNumber.ifNull("missing phone number") +
                creditCard.ifNull("missing credit card") +
                kycVerification.ifNull("missing kyc verification")
        }

        // If you want to go just for a null
        fun from2(user: CryptoUser): BuyCryptoInfo? = with(user){
            ::BuyCryptoInfo + 
                username +
                phoneNumber +
                creditCard +
                kycVerification
        }
  }  
}