diff --git a/stripe/src/main/java/com/stripe/android/ApiVersion.kt b/stripe/src/main/java/com/stripe/android/ApiVersion.kt
index 9e7cf693b4d..e2d9eedcdc3 100644
--- a/stripe/src/main/java/com/stripe/android/ApiVersion.kt
+++ b/stripe/src/main/java/com/stripe/android/ApiVersion.kt
@@ -9,7 +9,7 @@ package com.stripe.android
  * See [https://stripe.com/docs/upgrades](https://stripe.com/docs/upgrades) for latest
  * API changes.
  */
-internal data class ApiVersion constructor(val code: String) {
+internal data class ApiVersion private constructor(val code: String) {
 
     override fun toString(): String {
         return code
diff --git a/stripe/src/main/java/com/stripe/android/AppInfo.kt b/stripe/src/main/java/com/stripe/android/AppInfo.kt
index 7d2e5cf6ec7..b63d5024e24 100644
--- a/stripe/src/main/java/com/stripe/android/AppInfo.kt
+++ b/stripe/src/main/java/com/stripe/android/AppInfo.kt
@@ -13,7 +13,7 @@ import org.json.JSONObject
  * @param url Website for your application (e.g. "https://myawesomeapp.info")
  * @param partnerId Your Stripe Partner ID (e.g. "pp_partner_1234")
  */
-data class AppInfo internal constructor(
+data class AppInfo private constructor(
     private val name: String,
     private val version: String?,
     private val url: String?,
diff --git a/stripe/src/main/java/com/stripe/android/PaymentRelayStarter.kt b/stripe/src/main/java/com/stripe/android/PaymentRelayStarter.kt
index 20c023fc1e0..c683e8fe479 100644
--- a/stripe/src/main/java/com/stripe/android/PaymentRelayStarter.kt
+++ b/stripe/src/main/java/com/stripe/android/PaymentRelayStarter.kt
@@ -23,7 +23,7 @@ internal open class PaymentRelayStarter(
         host.startActivityForResult(PaymentRelayActivity::class.java, extras, requestCode)
     }
 
-    internal data class Data constructor(
+    internal data class Data private constructor(
         val stripeIntent: StripeIntent? = null,
         val exception: Exception? = null
     ) {
diff --git a/stripe/src/main/java/com/stripe/android/PaymentSessionConfig.kt b/stripe/src/main/java/com/stripe/android/PaymentSessionConfig.kt
index a7d9df094d3..d94de88b667 100644
--- a/stripe/src/main/java/com/stripe/android/PaymentSessionConfig.kt
+++ b/stripe/src/main/java/com/stripe/android/PaymentSessionConfig.kt
@@ -12,7 +12,7 @@ import kotlinx.android.parcel.Parcelize
  * Configuration for [PaymentSession].
  */
 @Parcelize
-data class PaymentSessionConfig internal constructor(
+data class PaymentSessionConfig private constructor(
     val hiddenShippingInfoFields: List<String> = emptyList(),
     val optionalShippingInfoFields: List<String> = emptyList(),
     val prepopulatedShippingInfo: ShippingInformation? = null,
diff --git a/stripe/src/main/java/com/stripe/android/ResultWrapper.kt b/stripe/src/main/java/com/stripe/android/ResultWrapper.kt
index de3644d615a..98a90148adc 100644
--- a/stripe/src/main/java/com/stripe/android/ResultWrapper.kt
+++ b/stripe/src/main/java/com/stripe/android/ResultWrapper.kt
@@ -1,6 +1,6 @@
 package com.stripe.android
 
-internal data class ResultWrapper<ResultType> constructor(
+internal data class ResultWrapper<ResultType> private constructor(
     val result: ResultType? = null,
     val error: Exception? = null
 ) {
diff --git a/stripe/src/main/java/com/stripe/android/StripeUid.kt b/stripe/src/main/java/com/stripe/android/StripeUid.kt
index b704f952911..237eb6db2d6 100644
--- a/stripe/src/main/java/com/stripe/android/StripeUid.kt
+++ b/stripe/src/main/java/com/stripe/android/StripeUid.kt
@@ -1,6 +1,6 @@
 package com.stripe.android
 
-internal data class StripeUid constructor(val value: String) {
+internal data class StripeUid private constructor(val value: String) {
     companion object {
         @JvmStatic
         fun create(uid: String): StripeUid {
diff --git a/stripe/src/main/java/com/stripe/android/model/AccountParams.kt b/stripe/src/main/java/com/stripe/android/model/AccountParams.kt
index 74212ba9d34..a7646f27a6e 100644
--- a/stripe/src/main/java/com/stripe/android/model/AccountParams.kt
+++ b/stripe/src/main/java/com/stripe/android/model/AccountParams.kt
@@ -3,7 +3,7 @@ package com.stripe.android.model
 /**
  * Represents a grouping of parameters needed to create a Token for a Connect account on the server.
  */
-data class AccountParams internal constructor(
+data class AccountParams private constructor(
     private val businessType: BusinessType?,
     private val businessData: Map<String, Any>?,
     private val tosShownAndAccepted: Boolean
diff --git a/stripe/src/main/java/com/stripe/android/model/Address.kt b/stripe/src/main/java/com/stripe/android/model/Address.kt
index c371edb9810..d9ce375d187 100644
--- a/stripe/src/main/java/com/stripe/android/model/Address.kt
+++ b/stripe/src/main/java/com/stripe/android/model/Address.kt
@@ -12,7 +12,7 @@ import org.json.JSONObject
  * object in the Source api.
  */
 @Parcelize
-data class Address internal constructor(
+data class Address private constructor(
     val city: String?,
     val country: String?,
     val line1: String?,
diff --git a/stripe/src/main/java/com/stripe/android/model/Card.kt b/stripe/src/main/java/com/stripe/android/model/Card.kt
index cc87a614569..1bb840a9197 100644
--- a/stripe/src/main/java/com/stripe/android/model/Card.kt
+++ b/stripe/src/main/java/com/stripe/android/model/Card.kt
@@ -19,7 +19,7 @@ import org.json.JSONObject
 /**
  * A model object representing a Card in the Android SDK.
  */
-data class Card internal constructor(
+data class Card private constructor(
 
     /**
      * @return the [number] of this card
diff --git a/stripe/src/main/java/com/stripe/android/model/ConfirmPaymentIntentParams.kt b/stripe/src/main/java/com/stripe/android/model/ConfirmPaymentIntentParams.kt
index cd48892e181..b5af19e2291 100644
--- a/stripe/src/main/java/com/stripe/android/model/ConfirmPaymentIntentParams.kt
+++ b/stripe/src/main/java/com/stripe/android/model/ConfirmPaymentIntentParams.kt
@@ -5,7 +5,7 @@ import com.stripe.android.ObjectBuilder
 import com.stripe.android.model.ConfirmStripeIntentParams.Companion.API_PARAM_CLIENT_SECRET
 import com.stripe.android.model.ConfirmStripeIntentParams.Companion.API_PARAM_USE_STRIPE_SDK
 
-data class ConfirmPaymentIntentParams internal constructor(
+data class ConfirmPaymentIntentParams private constructor(
     val paymentMethodCreateParams: PaymentMethodCreateParams?,
     val paymentMethodId: String?,
     val sourceParams: SourceParams?,
@@ -81,25 +81,24 @@ data class ConfirmPaymentIntentParams internal constructor(
             }
     }
 
-    @VisibleForTesting
-    internal class Builder
     /**
      * Sets the client secret that is used to authenticate actions on this PaymentIntent
      * @param clientSecret client secret associated with this PaymentIntent
      */
-    internal constructor(
+    @VisibleForTesting
+    internal class Builder internal constructor(
         internal val clientSecret: String
     ) : ObjectBuilder<ConfirmPaymentIntentParams> {
-        internal var paymentMethodCreateParams: PaymentMethodCreateParams? = null
-        internal var paymentMethodId: String? = null
-        internal var sourceParams: SourceParams? = null
-        internal var sourceId: String? = null
+        private var paymentMethodCreateParams: PaymentMethodCreateParams? = null
+        private var paymentMethodId: String? = null
+        private var sourceParams: SourceParams? = null
+        private var sourceId: String? = null
 
-        internal var extraParams: Map<String, Any>? = null
-        internal var returnUrl: String? = null
+        private var extraParams: Map<String, Any>? = null
+        private var returnUrl: String? = null
 
-        internal var savePaymentMethod: Boolean = false
-        internal var shouldUseSdk: Boolean = false
+        private var savePaymentMethod: Boolean = false
+        private var shouldUseSdk: Boolean = false
 
         /**
          * Sets the PaymentMethod data that will be included with this PaymentIntent
diff --git a/stripe/src/main/java/com/stripe/android/model/ConfirmSetupIntentParams.kt b/stripe/src/main/java/com/stripe/android/model/ConfirmSetupIntentParams.kt
index 46858f948ad..4a2d4917914 100644
--- a/stripe/src/main/java/com/stripe/android/model/ConfirmSetupIntentParams.kt
+++ b/stripe/src/main/java/com/stripe/android/model/ConfirmSetupIntentParams.kt
@@ -8,7 +8,7 @@ import com.stripe.android.model.ConfirmStripeIntentParams.Companion.API_PARAM_PA
 import com.stripe.android.model.ConfirmStripeIntentParams.Companion.API_PARAM_RETURN_URL
 import com.stripe.android.model.ConfirmStripeIntentParams.Companion.API_PARAM_USE_STRIPE_SDK
 
-data class ConfirmSetupIntentParams internal constructor(
+data class ConfirmSetupIntentParams private constructor(
     override val clientSecret: String,
     private val paymentMethodId: String?,
     val paymentMethodCreateParams: PaymentMethodCreateParams?,
diff --git a/stripe/src/main/java/com/stripe/android/model/Customer.kt b/stripe/src/main/java/com/stripe/android/model/Customer.kt
index 1dca0220a60..66840cc9a68 100644
--- a/stripe/src/main/java/com/stripe/android/model/Customer.kt
+++ b/stripe/src/main/java/com/stripe/android/model/Customer.kt
@@ -10,7 +10,7 @@ import org.json.JSONObject
 /**
  * Model for a Stripe Customer object
  */
-data class Customer internal constructor(
+data class Customer private constructor(
     val id: String?,
     val defaultSource: String?,
     val shippingInformation: ShippingInformation?,
diff --git a/stripe/src/main/java/com/stripe/android/model/CustomerSource.kt b/stripe/src/main/java/com/stripe/android/model/CustomerSource.kt
index 535d9189d2c..11b53467b7f 100644
--- a/stripe/src/main/java/com/stripe/android/model/CustomerSource.kt
+++ b/stripe/src/main/java/com/stripe/android/model/CustomerSource.kt
@@ -6,7 +6,7 @@ import org.json.JSONObject
 /**
  * Model of the "data" object inside a [Customer] "source" object.
  */
-data class CustomerSource internal constructor(
+data class CustomerSource private constructor(
     private val stripePaymentSource: StripePaymentSource
 ) : StripeModel(), StripePaymentSource {
 
diff --git a/stripe/src/main/java/com/stripe/android/model/PaymentIntent.kt b/stripe/src/main/java/com/stripe/android/model/PaymentIntent.kt
index fcd9512ce35..8757bd61f18 100644
--- a/stripe/src/main/java/com/stripe/android/model/PaymentIntent.kt
+++ b/stripe/src/main/java/com/stripe/android/model/PaymentIntent.kt
@@ -15,7 +15,7 @@ import org.json.JSONObject
  * - [Payment Intents Overview](https://stripe.com/docs/payments/payment-intents)
  * - [PaymentIntents API](https://stripe.com/docs/api/payment_intents)
  */
-data class PaymentIntent internal constructor(
+data class PaymentIntent private constructor(
     /**
      * @return Unique identifier for the object.
      */
@@ -141,7 +141,9 @@ data class PaymentIntent internal constructor(
         get() = if (nextAction == null || StripeIntent.NextActionType.UseStripeSdk !== nextActionType) {
             null
         } else {
-            StripeIntent.SdkData(nextAction[StripeIntent.NextActionType.UseStripeSdk.code] as Map<String, *>)
+            StripeIntent.SdkData(
+                nextAction[StripeIntent.NextActionType.UseStripeSdk.code] as Map<String, *>
+            )
         }
 
     override val redirectData: StripeIntent.RedirectData?
@@ -184,7 +186,7 @@ data class PaymentIntent internal constructor(
      *
      * See [last_payment_error](https://stripe.com/docs/api/payment_intents/object#payment_intent_object-last_payment_error).
      */
-    data class Error internal constructor(
+    data class Error private constructor(
 
         /**
          * For card errors, the ID of the failed charge.
diff --git a/stripe/src/main/java/com/stripe/android/model/PaymentMethodCreateParams.kt b/stripe/src/main/java/com/stripe/android/model/PaymentMethodCreateParams.kt
index 78c14958ac9..4e7038a6644 100644
--- a/stripe/src/main/java/com/stripe/android/model/PaymentMethodCreateParams.kt
+++ b/stripe/src/main/java/com/stripe/android/model/PaymentMethodCreateParams.kt
@@ -14,7 +14,7 @@ import org.json.JSONObject
  *
  * See [PaymentMethod] for API object.
  */
-data class PaymentMethodCreateParams internal constructor(
+data class PaymentMethodCreateParams private constructor(
     internal val type: Type,
     private val card: Card? = null,
     private val ideal: Ideal? = null,
@@ -107,7 +107,7 @@ data class PaymentMethodCreateParams internal constructor(
         SepaDebit("sepa_debit", true)
     }
 
-    data class Card internal constructor(
+    data class Card private constructor(
         private val number: String? = null,
         private val expiryMonth: Int? = null,
         private val expiryYear: Int? = null,
@@ -182,7 +182,7 @@ data class PaymentMethodCreateParams internal constructor(
         }
     }
 
-    data class Ideal internal constructor(private val bank: String?) : StripeParamsModel {
+    data class Ideal private constructor(private val bank: String?) : StripeParamsModel {
         override fun toParamMap(): Map<String, Any> {
             return bank?.let { mapOf(FIELD_BANK to it) }.orEmpty()
         }
@@ -205,7 +205,7 @@ data class PaymentMethodCreateParams internal constructor(
         }
     }
 
-    data class Fpx internal constructor(private val bank: String?) : StripeParamsModel {
+    data class Fpx private constructor(private val bank: String?) : StripeParamsModel {
         override fun toParamMap(): Map<String, Any> {
             return bank?.let {
                 mapOf(FIELD_BANK to it)
@@ -230,7 +230,7 @@ data class PaymentMethodCreateParams internal constructor(
         }
     }
 
-    data class SepaDebit internal constructor(private val iban: String?) : StripeParamsModel {
+    data class SepaDebit private constructor(private val iban: String?) : StripeParamsModel {
         override fun toParamMap(): Map<String, Any> {
             return iban?.let {
                 mapOf(FIELD_IBAN to it)
diff --git a/stripe/src/main/java/com/stripe/android/model/SetupIntent.kt b/stripe/src/main/java/com/stripe/android/model/SetupIntent.kt
index 9430f846be5..1d533391887 100644
--- a/stripe/src/main/java/com/stripe/android/model/SetupIntent.kt
+++ b/stripe/src/main/java/com/stripe/android/model/SetupIntent.kt
@@ -10,7 +10,7 @@ import org.json.JSONObject
  * A SetupIntent guides you through the process of setting up a customer's payment credentials for
  * future payments.
  */
-data class SetupIntent internal constructor(
+data class SetupIntent private constructor(
 
     /**
      * @return Unique identifier for the object.
@@ -137,7 +137,7 @@ data class SetupIntent internal constructor(
      *
      * See [last_setup_error](https://stripe.com/docs/api/setup_intents/object#setup_intent_object-last_setup_error).
      */
-    data class Error internal constructor(
+    data class Error private constructor(
 
         /**
          * For some errors that could be handled programmatically, a short string indicating the
diff --git a/stripe/src/main/java/com/stripe/android/model/Source.kt b/stripe/src/main/java/com/stripe/android/model/Source.kt
index e71f6539393..6d338f87def 100644
--- a/stripe/src/main/java/com/stripe/android/model/Source.kt
+++ b/stripe/src/main/java/com/stripe/android/model/Source.kt
@@ -13,7 +13,7 @@ import org.json.JSONObject
  *
  * See [Sources API Reference](https://stripe.com/docs/api/sources/object).
  */
-data class Source internal constructor(
+data class Source private constructor(
     override val id: String?,
     val amount: Long?,
     val clientSecret: String?,
diff --git a/stripe/src/main/java/com/stripe/android/model/SourceCardData.kt b/stripe/src/main/java/com/stripe/android/model/SourceCardData.kt
index cdbaeb55bda..4dcf954ac4e 100644
--- a/stripe/src/main/java/com/stripe/android/model/SourceCardData.kt
+++ b/stripe/src/main/java/com/stripe/android/model/SourceCardData.kt
@@ -11,7 +11,7 @@ import org.json.JSONObject
  * Model for data contained in the SourceTypeData of a Card Source.
  */
 @Suppress("MemberVisibilityCanBePrivate")
-data class SourceCardData internal constructor(
+data class SourceCardData private constructor(
     val addressLine1Check: String?,
     val addressZipCheck: String?,
 
diff --git a/stripe/src/main/java/com/stripe/android/model/SourceCodeVerification.kt b/stripe/src/main/java/com/stripe/android/model/SourceCodeVerification.kt
index 917167d889d..49f978424a8 100644
--- a/stripe/src/main/java/com/stripe/android/model/SourceCodeVerification.kt
+++ b/stripe/src/main/java/com/stripe/android/model/SourceCodeVerification.kt
@@ -10,7 +10,7 @@ import org.json.JSONObject
  *
  * *Not* source code verification.
  */
-data class SourceCodeVerification constructor(
+data class SourceCodeVerification private constructor(
     val attemptsRemaining: Int,
     @param:Status @field:Status @get:Status val status: String?
 ) : StripeModel() {
diff --git a/stripe/src/main/java/com/stripe/android/model/SourceOwner.kt b/stripe/src/main/java/com/stripe/android/model/SourceOwner.kt
index 5d64a35ec8d..9f0a23b1147 100644
--- a/stripe/src/main/java/com/stripe/android/model/SourceOwner.kt
+++ b/stripe/src/main/java/com/stripe/android/model/SourceOwner.kt
@@ -8,7 +8,7 @@ import org.json.JSONObject
  * Model for a [owner](https://stripe.com/docs/api#source_object-owner) object
  * in the Source api.
  */
-data class SourceOwner constructor(
+data class SourceOwner private constructor(
     val address: Address?,
     val email: String?,
     val name: String?,
diff --git a/stripe/src/main/java/com/stripe/android/model/SourceReceiver.kt b/stripe/src/main/java/com/stripe/android/model/SourceReceiver.kt
index 4d61623aaeb..a9f39c123db 100644
--- a/stripe/src/main/java/com/stripe/android/model/SourceReceiver.kt
+++ b/stripe/src/main/java/com/stripe/android/model/SourceReceiver.kt
@@ -8,7 +8,7 @@ import org.json.JSONObject
  * [receiver](https://stripe.com/docs/api/sources/object#source_object-receiver) object
  * in the Sources API. Present if the [Source] is a receiver.
  */
-data class SourceReceiver constructor(
+data class SourceReceiver private constructor(
     val address: String?,
     val amountCharged: Long,
     val amountReceived: Long,
diff --git a/stripe/src/main/java/com/stripe/android/model/SourceRedirect.kt b/stripe/src/main/java/com/stripe/android/model/SourceRedirect.kt
index 63bb173f6a1..1719f577c50 100644
--- a/stripe/src/main/java/com/stripe/android/model/SourceRedirect.kt
+++ b/stripe/src/main/java/com/stripe/android/model/SourceRedirect.kt
@@ -10,7 +10,7 @@ import org.json.JSONObject
  * Model for a [redirect](https://stripe.com/docs/api/sources/object#source_object-redirect) object
  * in the Sources API.
  */
-data class SourceRedirect constructor(
+data class SourceRedirect private constructor(
     val returnUrl: String?,
     @param:Status @field:Status @get:Status val status: String?,
     val url: String?
diff --git a/stripe/src/main/java/com/stripe/android/model/SourceSepaDebitData.kt b/stripe/src/main/java/com/stripe/android/model/SourceSepaDebitData.kt
index 7d1c7287e4c..0cd6ab2cf29 100644
--- a/stripe/src/main/java/com/stripe/android/model/SourceSepaDebitData.kt
+++ b/stripe/src/main/java/com/stripe/android/model/SourceSepaDebitData.kt
@@ -8,7 +8,7 @@ import org.json.JSONObject
 /**
  * Model for the SourceTypeData contained in a SEPA Debit Source object.
  */
-data class SourceSepaDebitData internal constructor(
+data class SourceSepaDebitData private constructor(
     val bankCode: String?,
     val branchCode: String?,
     val country: String?,
diff --git a/stripe/src/main/java/com/stripe/android/model/Stripe3ds2AuthResult.kt b/stripe/src/main/java/com/stripe/android/model/Stripe3ds2AuthResult.kt
index a49417a073b..b9b19a80efd 100644
--- a/stripe/src/main/java/com/stripe/android/model/Stripe3ds2AuthResult.kt
+++ b/stripe/src/main/java/com/stripe/android/model/Stripe3ds2AuthResult.kt
@@ -6,7 +6,7 @@ import org.json.JSONArray
 import org.json.JSONException
 import org.json.JSONObject
 
-internal data class Stripe3ds2AuthResult constructor(
+internal data class Stripe3ds2AuthResult private constructor(
     val id: String?,
     private val objectType: String?,
     val ares: Ares?,
@@ -79,7 +79,7 @@ internal data class Stripe3ds2AuthResult constructor(
         }
     }
 
-    data class Ares constructor(
+    data class Ares private constructor(
         val threeDSServerTransId: String?,
         private val acsChallengeMandated: String?,
         val acsSignedContent: String?,
@@ -218,7 +218,7 @@ internal data class Stripe3ds2AuthResult constructor(
         }
     }
 
-    data class MessageExtension constructor(
+    data class MessageExtension private constructor(
         // The name of the extension data set as defined by the extension owner.
         val name: String?,
 
@@ -307,7 +307,7 @@ internal data class Stripe3ds2AuthResult constructor(
         }
     }
 
-    data class ThreeDS2Error constructor(
+    data class ThreeDS2Error private constructor(
         val threeDSServerTransId: String?,
         val acsTransId: String?,
         val dsTransId: String?,
@@ -457,10 +457,11 @@ internal data class Stripe3ds2AuthResult constructor(
                         Ares.fromJson(authResultJson.optJSONObject(FIELD_ARES))
                 )
                 .setError(
-                    if (authResultJson.isNull(FIELD_ERROR))
+                    if (authResultJson.isNull(FIELD_ERROR)) {
                         null
-                    else
+                    } else {
                         ThreeDS2Error.fromJson(authResultJson.optJSONObject(FIELD_ERROR))
+                    }
                 )
                 .setFallbackRedirectUrl(
                     if (authResultJson.isNull(FIELD_FALLBACK_REDIRECT_URL))
diff --git a/stripe/src/main/java/com/stripe/android/model/StripeIntent.kt b/stripe/src/main/java/com/stripe/android/model/StripeIntent.kt
index 2be6c77427e..d2b7e225621 100644
--- a/stripe/src/main/java/com/stripe/android/model/StripeIntent.kt
+++ b/stripe/src/main/java/com/stripe/android/model/StripeIntent.kt
@@ -114,7 +114,7 @@ interface StripeIntent {
         }
     }
 
-    data class RedirectData internal constructor(
+    data class RedirectData private constructor(
         /**
          * See [PaymentIntent.next_action.redirect_to_url.url](https://stripe.com/docs/api/payment_intents/object#payment_intent_object-next_action-redirect_to_url-url)
          */
diff --git a/stripe/src/main/java/com/stripe/android/model/Token.kt b/stripe/src/main/java/com/stripe/android/model/Token.kt
index d7c18e30e55..e1dc13e94f9 100644
--- a/stripe/src/main/java/com/stripe/android/model/Token.kt
+++ b/stripe/src/main/java/com/stripe/android/model/Token.kt
@@ -11,7 +11,7 @@ import org.json.JSONObject
  * account details or personally identifiable information (PII), directly from your customers in a
  * secure manner. A Token representing this information is returned to you to use.
  */
-data class Token internal constructor(
+data class Token private constructor(
 
     /**
      * @return the Token id
diff --git a/stripe/src/main/java/com/stripe/android/model/wallets/AmexExpressCheckoutWallet.kt b/stripe/src/main/java/com/stripe/android/model/wallets/AmexExpressCheckoutWallet.kt
index 0556130bdb7..1f15c511e12 100644
--- a/stripe/src/main/java/com/stripe/android/model/wallets/AmexExpressCheckoutWallet.kt
+++ b/stripe/src/main/java/com/stripe/android/model/wallets/AmexExpressCheckoutWallet.kt
@@ -3,7 +3,7 @@ package com.stripe.android.model.wallets
 import kotlinx.android.parcel.Parcelize
 
 @Parcelize
-data class AmexExpressCheckoutWallet internal constructor(
+data class AmexExpressCheckoutWallet private constructor(
     val dynamicLast4: String?
 ) : Wallet(Type.AmexExpressCheckout) {
 
diff --git a/stripe/src/main/java/com/stripe/android/model/wallets/ApplePayWallet.kt b/stripe/src/main/java/com/stripe/android/model/wallets/ApplePayWallet.kt
index 75ee739baeb..434d64dacbe 100644
--- a/stripe/src/main/java/com/stripe/android/model/wallets/ApplePayWallet.kt
+++ b/stripe/src/main/java/com/stripe/android/model/wallets/ApplePayWallet.kt
@@ -3,7 +3,7 @@ package com.stripe.android.model.wallets
 import kotlinx.android.parcel.Parcelize
 
 @Parcelize
-data class ApplePayWallet internal constructor(
+data class ApplePayWallet private constructor(
     val dynamicLast4: String?
 ) : Wallet(Type.ApplePay) {
 
diff --git a/stripe/src/main/java/com/stripe/android/model/wallets/GooglePayWallet.kt b/stripe/src/main/java/com/stripe/android/model/wallets/GooglePayWallet.kt
index b26c358d148..fa360e1d8a6 100644
--- a/stripe/src/main/java/com/stripe/android/model/wallets/GooglePayWallet.kt
+++ b/stripe/src/main/java/com/stripe/android/model/wallets/GooglePayWallet.kt
@@ -4,7 +4,7 @@ import android.os.Parcelable
 import kotlinx.android.parcel.Parcelize
 
 @Parcelize
-data class GooglePayWallet internal constructor(
+data class GooglePayWallet private constructor(
     val dynamicLast4: String?
 ) : Wallet(Type.GooglePay), Parcelable {
     internal class Builder : Wallet.Builder<GooglePayWallet>() {
diff --git a/stripe/src/main/java/com/stripe/android/model/wallets/MasterpassWallet.kt b/stripe/src/main/java/com/stripe/android/model/wallets/MasterpassWallet.kt
index c92ad85ceb8..99426fe17f2 100644
--- a/stripe/src/main/java/com/stripe/android/model/wallets/MasterpassWallet.kt
+++ b/stripe/src/main/java/com/stripe/android/model/wallets/MasterpassWallet.kt
@@ -5,7 +5,7 @@ import kotlinx.android.parcel.Parcelize
 import org.json.JSONObject
 
 @Parcelize
-data class MasterpassWallet internal constructor(
+data class MasterpassWallet private constructor(
     val billingAddress: Address?,
     val email: String?,
     val name: String?,
diff --git a/stripe/src/main/java/com/stripe/android/model/wallets/SamsungPayWallet.kt b/stripe/src/main/java/com/stripe/android/model/wallets/SamsungPayWallet.kt
index 7f622fd1db7..6dd6e7f9ce5 100644
--- a/stripe/src/main/java/com/stripe/android/model/wallets/SamsungPayWallet.kt
+++ b/stripe/src/main/java/com/stripe/android/model/wallets/SamsungPayWallet.kt
@@ -3,7 +3,7 @@ package com.stripe.android.model.wallets
 import kotlinx.android.parcel.Parcelize
 
 @Parcelize
-data class SamsungPayWallet internal constructor(
+data class SamsungPayWallet private constructor(
     val dynamicLast4: String?
 ) : Wallet(Type.SamsungPay) {
     internal class Builder : Wallet.Builder<SamsungPayWallet>() {
diff --git a/stripe/src/main/java/com/stripe/android/model/wallets/VisaCheckoutWallet.kt b/stripe/src/main/java/com/stripe/android/model/wallets/VisaCheckoutWallet.kt
index f3ddb84dcce..d943837474c 100644
--- a/stripe/src/main/java/com/stripe/android/model/wallets/VisaCheckoutWallet.kt
+++ b/stripe/src/main/java/com/stripe/android/model/wallets/VisaCheckoutWallet.kt
@@ -5,7 +5,7 @@ import kotlinx.android.parcel.Parcelize
 import org.json.JSONObject
 
 @Parcelize
-data class VisaCheckoutWallet internal constructor(
+data class VisaCheckoutWallet private constructor(
     val billingAddress: Address?,
     val email: String?,
     val name: String?,
diff --git a/stripe/src/main/java/com/stripe/android/model/wallets/Wallet.kt b/stripe/src/main/java/com/stripe/android/model/wallets/Wallet.kt
index 84d3caf62fb..9ccede8e030 100644
--- a/stripe/src/main/java/com/stripe/android/model/wallets/Wallet.kt
+++ b/stripe/src/main/java/com/stripe/android/model/wallets/Wallet.kt
@@ -37,7 +37,7 @@ abstract class Wallet internal constructor(
     }
 
     @Parcelize
-    data class Address internal constructor(
+    data class Address private constructor(
         val city: String?,
         val country: String?,
         val line1: String?,
diff --git a/stripe/src/main/java/com/stripe/android/view/AddPaymentMethodActivityStarter.kt b/stripe/src/main/java/com/stripe/android/view/AddPaymentMethodActivityStarter.kt
index 3e6087d956c..196c718e0e0 100644
--- a/stripe/src/main/java/com/stripe/android/view/AddPaymentMethodActivityStarter.kt
+++ b/stripe/src/main/java/com/stripe/android/view/AddPaymentMethodActivityStarter.kt
@@ -27,7 +27,7 @@ class AddPaymentMethodActivityStarter internal constructor(
     REQUEST_CODE
 ) {
     @Parcelize
-    data class Args internal constructor(
+    data class Args private constructor(
         internal val shouldAttachToCustomer: Boolean,
         internal val shouldRequirePostalCode: Boolean,
         internal val isPaymentSessionActive: Boolean,
diff --git a/stripe/src/main/java/com/stripe/android/view/PaymentFlowActivityStarter.kt b/stripe/src/main/java/com/stripe/android/view/PaymentFlowActivityStarter.kt
index 95e995f9483..fca348c44b6 100644
--- a/stripe/src/main/java/com/stripe/android/view/PaymentFlowActivityStarter.kt
+++ b/stripe/src/main/java/com/stripe/android/view/PaymentFlowActivityStarter.kt
@@ -20,7 +20,7 @@ class PaymentFlowActivityStarter :
     )
 
     @Parcelize
-    data class Args internal constructor(
+    data class Args private constructor(
         internal val paymentSessionConfig: PaymentSessionConfig,
         internal val paymentSessionData: PaymentSessionData?,
         internal val isPaymentSessionActive: Boolean
diff --git a/stripe/src/main/java/com/stripe/android/view/PaymentMethodsActivityStarter.kt b/stripe/src/main/java/com/stripe/android/view/PaymentMethodsActivityStarter.kt
index b3375a220c8..d346d1f3b83 100644
--- a/stripe/src/main/java/com/stripe/android/view/PaymentMethodsActivityStarter.kt
+++ b/stripe/src/main/java/com/stripe/android/view/PaymentMethodsActivityStarter.kt
@@ -38,7 +38,7 @@ class PaymentMethodsActivityStarter : ActivityStarter<PaymentMethodsActivity, Ar
     )
 
     @Parcelize
-    data class Args internal constructor(
+    data class Args private constructor(
         internal val initialPaymentMethodId: String?,
         val shouldRequirePostalCode: Boolean,
         @LayoutRes val addPaymentMethodFooter: Int,