Add Crypto to PaymentSheet (#4480)

## Summary
Add Crypto to PaymentSheet

## Motivation
Add Crypto to PaymentSheet

## Testing
Added tests + tested with Basic Non-Card Payment Examples project

## Changelog
See diff

---------

Co-authored-by: David Estes <[email protected]>

Author: ericzhang-stripe

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## X.Y.Z 2025-XX-YY
 ### PaymentSheet
 * [Fixed] Fixed an issue in Embedded Payment Element (private beta) where the row could be selected even though there's no valid payment option.
+* [Added] Support for Crypto in PaymentSheet
 
 ## 24.6.0 2025-02-18
 * [Fixed] The SDK and example apps now compile in Xcode 16.2

Example/PaymentSheet Example/PaymentSheetUITest/EmbeddedUITest.swift

@@ -667,7 +667,10 @@ class EmbeddedUITests: PaymentSheetUITestCase {
         app.buttons["Present embedded payment element"].waitForExistenceAndTap()
 
         app.buttons["Apple Pay"].waitForExistenceAndTap()
+        app.swipeUp() // scroll to see the checkout button
+        XCTAssertTrue(app.buttons["Checkout"].waitForExistence(timeout: 10))
         app.buttons["Checkout"].waitForExistenceAndTap()
+        XCTAssertTrue(app.buttons["Checkout"].isEnabled)
         payWithApplePay()
         XCTAssertTrue(app.staticTexts["Success!"].waitForExistence(timeout: 10))
 
@@ -1018,6 +1021,7 @@ class EmbeddedUITests: PaymentSheetUITestCase {
         XCTAssertTrue(app.staticTexts["Add card"].waitForExistence(timeout: 10))
         continueButton.tap()
 
+        app.swipeUp() // scroll to see the confirm button
         let confirmButton = app.buttons["Confirm Payment"]
         XCTAssertTrue(confirmButton.waitForExistenceAndTap())
 

Example/PaymentSheet Example/PaymentSheetUITest/PaymentSheetLPMUITest.swift

@@ -207,6 +207,25 @@ class PaymentSheetStandardLPMUIOneTests: PaymentSheetStandardLPMUICase {
         XCTAssertTrue(app.staticTexts["Success!"].waitForExistence(timeout: 15.0))
     }
 
+    func testCryptoPaymentMethod() throws {
+        var settings = PaymentSheetTestPlaygroundSettings.defaultValues()
+        settings.layout = .horizontal
+        settings.currency = .usd
+        settings.merchantCountryCode = .US
+        loadPlayground(app, settings)
+        app.buttons["Present PaymentSheet"].tap()
+
+        // Select Crypto
+        tapPaymentMethod("Crypto")
+
+        // Pay
+        app.buttons["Pay $50.99"].waitForExistenceAndTap()
+        webviewAuthorizePaymentButton.waitForExistenceAndTap(timeout: 10)
+
+        // Close the webview, Crypto's test playground is out of scope
+        app.otherElements["TopBrowserBar"].buttons["Close"].waitForExistenceAndTap(timeout: 10)
+    }
+
     func testZipPaymentMethod() throws {
         var settings = PaymentSheetTestPlaygroundSettings.defaultValues()
         settings.layout = .horizontal

StripePaymentSheet/StripePaymentSheet/Resources/JSON/form_specs.json

@@ -877,7 +877,34 @@
                 }
             }
         }
-    },      
+    },
+    {
+        "type": "crypto",
+        "async": false,
+        "selector_icon": {
+            "light_theme_png": "https://js.stripe.com/v3/fingerprinted/img/payment-methods/[email protected]",
+            "light_theme_svg": "https://js.stripe.com/v3/fingerprinted/img/payment-methods/icon-pm-crypto-15fd4ffeafd1b13e40688c8a06d79ba4.svg",
+            "dark_theme_png": "https://js.stripe.com/v3/fingerprinted/img/payment-methods/[email protected]",
+            "dark_theme_svg": "https://js.stripe.com/v3/fingerprinted/img/payment-methods/icon-pm-crypto_dark-f19bb5c5400c6cde94dd53b7f1ce7217.svg"
+        },
+        "fields": [
+        ],
+        "next_action_spec": {
+            "confirm_response_status_specs": {
+                "requires_action": {
+                    "type": "redirect_to_url"
+                }
+          },
+            "post_confirm_handling_pi_status_specs": {
+                "succeeded": {
+                    "type": "finished"
+                },
+                "requires_action": {
+                    "type": "canceled"
+                }
+            }
+        }
+    },
     {
         "type": "mobilepay",
         "async": false,

StripePaymentSheet/StripePaymentSheet/Source/PaymentSheet/PaymentMethodType.swift

@@ -317,7 +317,7 @@ extension PaymentSheet {
                         return []
                     case .alipay, .EPS, .FPX, .giropay, .grabPay, .netBanking, .payPal, .przelewy24, .klarna,
                             .bancontact, .iDEAL, .cashApp, .affirm, .zip, .revolutPay, .amazonPay, .alma,
-                            .mobilePay, .swish, .twint, .sunbit, .billie, .satispay:
+                            .mobilePay, .swish, .twint, .sunbit, .billie, .satispay, .crypto:
                         return [.returnURL]
                     case .USBankAccount:
                         return [
@@ -330,7 +330,7 @@ extension PaymentSheet {
                         return [.returnURL, .userSupportsDelayedPaymentMethods]
                     case .afterpayClearpay:
                         return [.returnURL, .shippingAddress]
-                    case .link, .unknown, .crypto:
+                    case .link, .unknown:
                         return [.unsupported]
                     @unknown default:
                         return [.unsupported]

StripePaymentSheet/StripePaymentSheet/Source/PaymentSheet/PaymentSheet+PaymentMethodAvailability.swift

@@ -35,6 +35,7 @@ extension PaymentSheet {
         .sunbit,
         .billie,
         .satispay,
+        .crypto,
         .boleto,
         .swish,
         .twint,
@@ -59,17 +60,17 @@ extension PaymentSheet {
         guard elementsSession.supportsLink else {
             return false
         }
-        
+
         // Disable Link if the merchant is using card brand filtering
         guard configuration.cardBrandAcceptance == .all else {
            return false
         }
-        
+
         // Disable Link if the merchant is using billing address collection API
         guard !configuration.requiresBillingDetailCollection() else {
           return false
         }
-        
+
         return true
     }
 

StripePaymentSheet/StripePaymentSheetTests/PaymentSheet/PaymentSheetLPMConfirmFlowTests.swift

@@ -227,6 +227,16 @@ final class PaymentSheet_LPM_ConfirmFlowTests: STPNetworkStubbingTestCase {
         }
     }
 
+    func testCryptoConfirmFlows() async throws {
+        try await _testConfirm(intentKinds: [.paymentIntent],
+                               currency: "USD",
+                               paymentMethodType: .crypto,
+                               merchantCountry: .US) { form in
+            // Crypto has no input fields
+            XCTAssertEqual(form.getAllUnwrappedSubElements().count, 1)
+        }
+    }
+
     func testAlipayConfirmFlows() async throws {
         try await _testConfirm(intentKinds: [.paymentIntent],
                                currency: "USD",