socialmohansingh / swift-iap

IAP

An ios package for in app purchase integration.

Integration

1. Xcode -> File -> Swift Packages -> Add Package Dependencies
2. put https://git.ebpearls.com/ios-packages/iap.git and follow the prompts.

Usage

1. Determine product identifiers used in your app and create enum value for them using IAPProductIdentifiable protocol.

       enum IAPIdentifiers: IAPProductIdentifiable, CaseIterable {
       case yearly
       case monthly
       
       var term: PaymentTerm {
           switch self {
           case .yearly: return .yearly
           case .monthly: return .monthly
           }
       }
       
       var identifier: String {
           switch self {
           case .yearly: return "YEARLY_SUBSCRIPTION_IDENTIFIER"
           case .monthly: return "MONTHLY_SUBSCRIPTION_IDENTIFIER"
           }
       }
   }

2. Listen for the product info.

       // listen for products fetch result
       IAP.shared.products.receive(on: RunLoop.main).sink { [weak self] products in
           guard let self = self else { return }
           // STORE FOR YOUR USAGE WITHIN APP, These are the instance of IAPProduct
       }.store(in: &bag)

3. Pass the identifiers to IAP class so that their details are retrieved from appstore and the result are listened from step 2.

       IAP.shared.setProducts(availableProducts: Constant.IAPIdentifiers.allCases)

4. For purchasing

       IAP.shared.purchase(product: /*IAPProduct*/)

5. Listen for the purchasing states

       // states when purchase is in progress
       IAP.shared.productPurchaseState.receive(on: RunLoop.main).sink { [weak self] state in
           guard let self = self else { return }
           switch state {
           case .failed(let error):
               /// handle errors properly
           case .purchased(let inAppPurchase):
               /// The purchase info is received here if completed
           default: break
           }
       }.store(in: &viewModel.bag)

6. Validating and other logic are handled by server. We can fetch latest receipt to be able to restore in server using following method from IAP.

       public func fetchLatestReceipt(force: Bool = false, completion: @escaping (_ receiptData: Data?, _ error: ReceiptError?) -> Void)