Pre-requisites

XCode 13 or newer
Cocoapods

Create a Payment Token

A payment token represents an order or a purchase. The first step to open a Layer payment page on your website or checkout page is to create a payment_token.

A payment_token can be created by referring to the create payment token API. This API should always be called from your server. You will receive payment_token as a response from the create payment token API.

Installation

OpenPayment is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'OpenPayment'

then run

pod install

Initializing OpenPayment

You can see below code, these are minimum and mandatory calls to enable payment processing. If any of it is missed then an error will be generated.

  let openPaymentBuilderObj = OpenPaymentBuilder()
 openPaymentBuilderObj.setAccessKey("accessToken")
 openPaymentBuilderObj.setEnvironment(.Sandbox)
 openPaymentBuilderObj.setPaymentToken("paymentToken")
 openPaymentBuilderObj.setErrorColor("colorhexcode") // Optional
 openPaymentBuilderObj.setLogoUrl("Your LogoURL") // Optional
 openPaymentBuilderObj.setBgColor("colorhexcode") // Optional

 let openPaymentOBj = openPaymentBuilderObj.buildObject()
 
 openPaymentOBj.setBaseViewController(self)

Calls and Descriptions

Method	Mandatory	Description
setAccessKey()	(Y)	Access key is a unique key which you can generate from your Open dashboard.
setEnvironment()	(Y)	Following ENUM can be passed to this method. .SANDBOX .LIVE
setPaymentToken()	(Y)	To create the token using Create Payment Token API.
setErrorColor()		Error color (icons/ error lines / error messages) of Layer will be changed to this . Example: #83025c
setLogoUrl()		Logo is changed to image source passed.
setBgColor()		Main color of Layer will be changed to this . Example: #f8c5c5

Implement Delegate

To start the payment, first set OpenPayment delegate to get payment status

 openPaymentOBj.delegate = self

Proceed to Payment

To start the payment, just call startPayment() method of OpenPayment and after that transaction will get started.

openPaymentOBj.startPayment()

Description:

onPaymentCompleted() - This method is invoked when a transaction is completed. It may either captured, failed, pending and cancelled.

onPaymentError(): - Integration errors.

Getting Transaction Details

To get details of transactions, we have a callback method onPaymentCompleted() with a parameter of TransactionDetails.
To get details, below method of TransactionDetails are useful:

transactionDetails.paymentId
transactionDetails.paymentTokenId
transactionDetails.status
Call the webhook URL to get the complete response of the transactions.