iOS SDK

import SezzleMerchantSDK

@main
class AppDelegate: UIResponder, UIApplicationDelegate {
    func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {
        SezzleSDK.shared.configure(
            publicKey: "sz_pub_your_key_here",
            environment: .production  // use .sandbox for testing
        )
        return true
    }
}

import SezzleMerchantSDK

let promoView = SezzlePromotionalView(
    amountInCents: 9999,  // $99.99
    presentingFrom: self   // UIViewController for modal presentation
)
view.addSubview(promoView)

promoView.update(amountInCents: 14999)  // price changed to $149.99

SezzlePromotionalView(
    amountInCents: Int,
    currency: String = "USD",
    style: SezzlePromotionalStyle = .light,
    widgetConfig: SezzleWidgetConfig = .default,
    presentingFrom viewController: UIViewController
)

let config = SezzleWidgetConfig(
    longTermConfig: SezzleLongTermConfig(
        minPriceInCents: 25_000  // $250+ shows monthly payments
    )
)

let promoView = SezzlePromotionalView(
    amountInCents: 79900,
    widgetConfig: config,
    presentingFrom: self
)

SezzlePromoDataHandler.getMessage(amountInCents: 9999) { attributedString in
    myLabel.attributedText = attributedString
}

let checkout = SezzleCheckout(
    customer: SezzleCustomer(
        email: "customer@example.com",
        firstName: "Jane",
        lastName: "Doe",
        phone: "+15551234567",
        billingAddress: SezzleAddress(
            street: "123 Main St",
            city: "Minneapolis",
            state: "MN",
            postalCode: "55401",
            countryCode: "US"
        )
    ),
    order: SezzleOrder(
        referenceId: "order-12345",
        description: "Wireless Earbuds",
        amount: SezzleAmount(amountInCents: 4599, currency: "USD"),
        items: [
            SezzleItem(
                name: "Wireless Earbuds",
                sku: "WE-001",
                quantity: 1,
                price: SezzleAmount(amountInCents: 3999, currency: "USD")
            )
        ],
        taxAmount: SezzleAmount(amountInCents: 350, currency: "USD"),
        shippingAmount: SezzleAmount(amountInCents: 250, currency: "USD")
    )
)

SezzleSDK.shared.startCheckout(
    checkout,
    from: self,            // presenting UIViewController
    delegate: self,        // SezzleCheckoutDelegate
    mode: .systemBrowser   // or .webView
)

extension ProductViewController: SezzleCheckoutDelegate {

    func checkoutDidComplete(result: SezzleCheckoutResult) {
        // For this flow, `result.orderUUID` is populated.
        // (For the server-driven flow, see Section 8.)
        if let orderUUID = result.orderUUID {
            // Send orderUUID to your backend to capture payment
            // POST /v2/order/{orderUUID}/capture
            print("Order completed: \(orderUUID)")
        }
    }

    func checkoutDidCancel() {
        // Customer closed checkout without completing
        print("Checkout cancelled")
    }

    func checkoutDidFail(error: SezzleError) {
        // Handle the error
        switch error {
        case .networkError(let underlying):
            print("Network error: \(underlying)")
        case .apiError(let statusCode, let message):
            print("API error \(statusCode): \(message)")
        case .browserDismissed:
            print("Browser dismissed")
        case .notConfigured:
            print("SDK not configured")
        case .invalidResponse:
            print("Invalid response")
        }
    }
}

SezzleSDK.shared.startCheckout(
    checkout,
    from: self,
    delegate: self,
    mode: .webView
)

let promoView = SezzlePromotionalView(
    amountInCents: 9999,
    style: .dark,  // force dark style
    presentingFrom: self
)

SezzleSDK.shared.startCheckout(
    checkoutURL: URL(string: checkoutURL)!,                              // from order.checkout_url (String → URL)
    completeURL: URL(string: "yourapp-sezzle://checkout/done")!,         // matches your server's complete_url.href
    cancelURL:   URL(string: "yourapp-sezzle://checkout/cancelled")!,    // matches your server's cancel_url.href
    from: self,
    delegate: self,
    mode: .webView   // or .systemBrowser
)

func checkoutDidComplete(result: SezzleCheckoutResult) {
    guard let callbackURL = result.callbackURL else { return }
    let orderRef = URLComponents(url: callbackURL, resolvingAgainstBaseURL: false)?
        .queryItems?
        .first(where: { $0.name == "orderRef" })?
        .value
    // Look up orderRef in your backend, then call /v2/order/{order.uuid}/capture
}

SezzleSDK.shared.configure(
    publicKey: "sz_pub_your_sandbox_key",
    environment: .sandbox
)