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The native SDKs provide a convenient way to retrieve all stored payment methods for a specific buyer, filtered by the checkout’s currency and country. This allows you to display previously saved payment methods to returning customers for a faster checkout experience.

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Use cases

List buyer payment methods to:
  • Display saved payment methods to returning customers
  • Allow buyers to select from their stored cards and payment methods
  • Filter payment methods by country and currency for the current checkout
  • Show payment method details (last 4 digits, expiration date, card brand)
  • Sort payment methods by last used date or other criteria

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Implementation

Create a request with buyer identification (buyer ID or external identifier) and optional filters to retrieve stored payment methods. 
let gr4vy = try Gr4vy(
    gr4vyId: "example",
    token: "your_jwt_token",
    merchantId: "merchant_123", // Set the default merchant ID
    server: .sandbox,
    debugMode: true
)

// Create payment methods criteria
let paymentMethods = Gr4vyBuyersPaymentMethods(
    buyerId: "buyer_123",
    buyerExternalIdentifier: "external_456",
    sortBy: .lastUsedAt,
    orderBy: .desc,
    country: "US",
    currency: "USD"
)

// Create request
let request = Gr4vyBuyersPaymentMethodsRequest(
    paymentMethods: paymentMethods,
    merchantId: "merchant_123", // Optional
    timeout: 30.0
)

// Async/await
do {
    let paymentMethodsList = try await gr4vy.paymentMethods.list(request: request)
    print("Found \(paymentMethodsList.count) payment methods")
} catch {
    print("Error fetching payment methods: \(error)")
}

// Completion handler
gr4vy.paymentMethods.list(request: request) { result in
    switch result {
    case .success(let paymentMethodsList):
        print("Found \(paymentMethodsList.count) payment methods")
    case .failure(let error):
        print("Error fetching payment methods: \(error)")
    }
}

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Best practices

  • Buyer identification: Use either buyerId (internal Gr4vy ID) or buyerExternalIdentifier (your system’s ID) to identify the buyer.
  • Filter appropriately: Apply country and currency filters to show only payment methods relevant to the current transaction.
  • Sort by usage: Sort by lastUsedAt to show the most recently used payment methods first for better user experience.
  • Error handling: Always handle network and HTTP errors gracefully and show appropriate messages to users.
  • Timeout configuration: Use custom timeouts for payment methods requests if your network conditions require it.
  • Display clearly: Show payment method details (card brand, last 4 digits, expiration date) to help users identify their preferred method.