Pay-Button-iOS

Integrating iOS Pay Button SDK in your application

Introduction

Before diving into the development process, it's essential to establish the prerequisites and criteria necessary for a successful build. In this step, we'll outline the specific iOS requirements, including the minimum SDK version and other important details you need to consider. Let's ensure your project is set up for success from the very beginning.

Sample Demo

Step 1: Requirements

We support from iOS 13.0+
Swift Version 5.0+
Objective-C

Step 2: Get Your Public Keys

While you can certainly use the sandbox keys available within our sample app which you can get by following the installation process, however, we highly recommend visiting our onboarding page, there you'll have the opportunity to register your package name and acquire your essential Tap Key for activating Pay-Button-iOS integration.

Step 3: Installation

Swift Package Manager

Open your project's settings.
Navigate to Package Dependencies
Add a new package
Paste PayButton-iOS package url :https://github.com/Tap-Payments/Pay-Button-iOS.git
Add to the target.

CocoaPods

Add this to your pod file:
pod Pay-Button-iOS
Run this in terminal :

pod install
pod update

Sometimes while using Cocoapods, in Xcode beta versions you may face Sandbox deny errors when running app on Simulator. To solve this simply:
- Go to the build settings
- Mark all
- Set ENABLE_USER_SCRIPT_SANDBOXING to NO

Step 4: Integrating Pay-Button-iOS

This integration offers two distinct options: a simple integration designed for rapid development and streamlined merchant requirements, and an advanced integration that adds extra features for a more dynamic payment integration experience.

Integration Flow

Noting that in iOS, you have the ability to create the UI part of the PayButton-iOS by creating it as normal view in your storyboard then implement the functionality through code or fully create it by code. Below we will describe both flows:

You will have to create a variable of type PayButtonView, which can be done in one of two ways:
- Created in the storyboard and then linked to a variable in code.
- Created totally within the code.
Once you create the variable in any way, you will have to follow these steps:
- Create the parameters.
- Pass the parameters to the variable.
- Implement PayButtonDelegate protocol, which allows you to get notified by different events fired from within the PayButton-iOS SDK, also called callback functions.

Initialising the UI

🚧 Note: You can initialise the PayButton-iOS SDK either using Storyboard for the UIView then implementing the functionality through code or directly create everything through Code as provided below.

Using Storyboard

Creating the PayButtonView in storyboard
1. Drag and drop a UIView inside the UIViewController you want in the Storyboard.
2. Declare as of type PayButtonView
3. Make an IBOutlet to the UIViewController.
Accessing the PayButtonView created in storyboard in your code 3. Create an IBOutlet from the created view above to your UIViewController

 /// The outlet from the created view above
@IBOutlet weak var payButton: PayButtonView!

Using Code to create the PayButtonView

Creating the PayButtonView from code
1. Head to your UIViewController where you want to display the PayButtonView as a subview.
2. Import PayButton-iOS as follows import Pay_Button_iOS at the top of your UIViewController.
3. Create a class variable **var** payButton: PayButtonView = .init() /// An instance of the pay button
4. In the coming code sample, we will show how to create the view and how to set its layout constraints to take full width as recommended.

.
.
.
// Add it as a subview
view.addSubview(payButton)
// Make it adjusts to constraints at run time
payButton.translatesAutoresizingMaskIntoConstraints = **false**
// Set the constraints as recommended by us to have full width + leading & trailing paddings.
// Let us center vertically for demo purposes
// Height is to be set to 48
NSLayoutConstraint.activate([
payButton.leadingAnchor.constraint(equalTo: **self**.view.leadingAnchor, constant: 10),
payButton.trailingAnchor.constraint(equalTo: **self**.view.trailingAnchor, constant: -10),
payButton.centerYAnchor.constraint(equalTo: **self**.view.centerYAnchor)])
.
.

Simple Integration

Here, you'll discover a comprehensive table featuring the parameters applicable to the simple integration. Additionally, you'll explore the various methods for integrating the SDK, either using storyboard to create the layout and then implementing the controllers functionalities by code, or directly using code. Furthermore, you'll gain insights into how to receive the callback notifications.

Parameters

Each parameter is linked to the reference section, which provides a more in depth explanation of it.

Parameter	Description	Required	Type	Sample
operator	It has the key obtained after registering your package name, also known as Public key. Also, the hashString value which is used to validate live charges.	True	`Dictionary`	`let operator:[String:Any]: ["publicKey":"pk_test_YhUjg9PNT8oDlKJ1aE2fMRz7", "hashString":""]`
order	Order details linked to the charfe.	True	`Dictionary`	`let order:[String:String] = ["id":"", "amount":1, "currency":"SAR", "description": " description","reference":"","metadata":[:]]`
customer	Customer details for charge process.	True	`Dictionary`	`let customer = ["id":"","name":[["lang":"en","first":"TAP","middle":"","last":"PAYMENTS"]], "contact":["email":"[email protected]", "phone":["countryCode":"+965","number":"88888888"]]]`

Configuring the Pay-Button-iOS SDK

After creating the UI using any of the previously mentioned ways, it is time to pass the parameters needed for the SDK to work as expected and serve your need correctly.

Creating the parameters
To allow flexibility and to ease the integration, your application will only has to pass the parameters as a Dictionary[String:Any] .
First, let us create the required parameters:

/// The minimum needed configuration dictionary
    let parameters: [String: Any] =
      [
      "operator": ["publicKey": "pk_test_HJN863LmO15EtDgo9cqK7sjS", "hashString": ""],
      "order": [
        "id": "",
        "amount": 0.1,
        "currency": "BHD",
        "description": "description",
        "reference": ""
      ],
      "customer": [
        "id": "",
        "name": [["lang": "en", "first": "TAP", "middle": "", "last": "PAYMENTS"]],
        "contact": [
          "email": "[email protected]",
          "phone": ["countryCode": "+965", "number": "88888888"],
        ],
      ],
    ]

Pass these parameters to the created Button variable before as follows

// We provide the button view the needed parameters and we assign ourselves optionally to be the delegate, where we can listen to callbacks. Also, we have to pass which button type we want to display.
payButton.initPayButton(configDict: self.parameters, delegate: self, payButtonType: .BenefitPay)

Full code snippet for creating the parameters + passing it PayButton variable

import Pay_Button_iOS
import UIKit

class ViewController: UIViewController {

  /// Create a class variable to hold your  pay button
  var  payButton: PayButtonView = .init()
  /// The minimum needed configuration dictionary
  let parameters: [String: Any] =
    [
      "operator": ["publicKey": "pk_test_HJN863LmO15EtDgo9cqK7sjS", "hashString": ""],
      "order": [
        "id": "",
        "amount": 0.1,
        "currency": "BHD",
        "description": "description",
        "reference": "",
      ],
      "customer": [
        "id": "",
        "name": [["lang": "en", "first": "TAP", "middle": "", "last": "PAYMENTS"]],
        "contact": [
          "email": "[email protected]",
          "phone": ["countryCode": "+965", "number": "88888888"],
        ],
      ],
    ]

  override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.

    // Add it as a subview
    view.addSubview(payButton)
    // Make it adjusts to constraints at run time
    payButton.translatesAutoresizingMaskIntoConstraints = false
    // Set the constraints as recommended by us to have full width + leading & trailing paddings.
    // Let us center vertically for demo purposes
    // Height is to be set to 48
    NSLayoutConstraint.activate([
      payButton.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 10),
      payButton.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: -10),
      payButton.centerYAnchor.constraint(equalTo: self.view.centerYAnchor),
    ])

    // let us configure the button
	payButton.initPayButton(configDict: self.parameters, delegate: self, payButtonType: 	.BenefitPay)

  }

}

extension ViewController: PayButtonDelegate {

}

Receiving Callback Notifications

Now we have created the UI and the parameters required to to correctly display PayButton form. For the best experience, your class will have to implement PayButtonDelegate protocol, which is a set of optional callbacks, that will be fired based on different events from within the pay button. This will help you in deciding the logic you need to do upon receiving each event. Kindly follow the below steps in order to complete the mentioned flow:

Go back to UIViewController/UiView file you want to get the callbacks into.
Head to the class declaration line
Add PayButtonDelegate
Override the required callbacks as follows:

  ///  Will be fired whenever there is an error related to the button connectivity or apis
  ///  - Parameter  data: includes a JSON format for the error description and error
  func onError(data: String) {
	print("\n\n========\n\nonError \(data))")
  }
	///  Will be fired whenever the charge is completed, regardless of its status.
	///  - Parameter  data: includes a JSON format for the charge details
  func onSuccess(data: String) {
	print("\n\n========\n\nonSuccess \(data))")
  }
  ///  Will be fired whenever the pay button is rendered and loaded
  func onReady() {
    print("\n\n========\n\nonReady")
  }

Full code snippet for creating the parameters + passing it PayButton variable + Listening to callbacks

import Pay_Button_iOS
import UIKit

class ViewController: UIViewController {

  var payButton: PayButtonView = .init()

  /// The minimum needed configuration dictionary
  let parameters: [String: Any] =
    [
      "operator": ["publicKey": "pk_test_HJN863LmO15EtDgo9cqK7sjS", "hashString": ""],
      "order": [
        "id": "",
        "amount": 0.1,
        "currency": "BHD",
        "description": "description",
        "reference": "",
      ],
      "customer": [
        "id": "",
        "name": [["lang": "en", "first": "TAP", "middle": "", "last": "PAYMENTS"]],
        "contact": [
          "email": "[email protected]",
          "phone": ["countryCode": "+965", "number": "88888888"],
        ],
      ],
    ]

  override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    addButtonView()
    payButton.initPayButton(configDict: self.parameters, delegate: self, payButtonType: .BenefitPay)
  }

  func addButtonView() {
    // Add it as a subview
    view.addSubview(payButton)
    // Make it adjusts to constraints at run time
    payButton.translatesAutoresizingMaskIntoConstraints = false
    // Set the constraints as recommended by us to have full width + leading & trailing paddings.
    // Let us center vertically for demo purposes
    // Height is to be set to 48
    NSLayoutConstraint.activate([
      payButton.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 10),
      payButton.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: -10),
      payButton.centerYAnchor.constraint(equalTo: self.view.centerYAnchor),
    ])
  }

}

extension ViewController: PayButtonDelegate {
  ///  Will be fired whenever there is an error related to the button connectivity or apis
  ///  - Parameter  data: includes a JSON format for the error description and error
  func onError(data: String) {
    print("\n\n========\n\nonError \(data))")
  }
  ///  Will be fired whenever the charge is completed, regardless of its status.
  ///  - Parameter  data: includes a JSON format for the charge details
  func onSuccess(data: String) {
    print("\n\n========\n\nonSuccess \(data))")
  }
  ///  Will be fired whenever the pay button is rendered and loaded
  func onReady() {
    print("\n\n========\n\nonReady")
  }
}

Advanced Integration

The advanced configuration for the PayButton-iOS integration not only has all the features available in the simple integration but also introduces new capabilities, providing merchants with maximum flexibility. You can find a code below, where you'll discover comprehensive guidance on implementing the advanced flow as well as a complete description of each parameter.

Parameters

Each parameter is linked to the reference section, which provides a more in depth explanation of it.

Configuration	Description	Required	Type	Sample
operator	It has the key obtained after registering your package name, also known as Public key. Also, the hashString value which is used to validate live charges.	True	`Dictionary`	`let operator:[String:Any]: ["publicKey":"pk_test_YhUjg9PNT8oDlKJ1aE2fMRz7", "hashString":""]`
scope	Intention of the pay button (optional.)	False	`String`	`let scope:String = "charge"`
transaction	Transaction details linked to the charge.	True	`Dictionary`	`let transaction:[String:Any] = ["authentication":true,"authorize":["type":"VOID","time":12],"paymentAgreement": ["id": "","contract": ["id": ""]], "reference":"trx", "metadata":[:]]`
order	Order details linked to the charge.	True	`Dictionary`	`let order:[String:String] = ["id":"", "amount":1, "currency":"SAR", "description": " description","reference":"","metadata":[:]]`
invoice	Invoice id to link to the order (optional).	False	`Dictionary`	`let invoice:[String:String] = ["id":""]`
merchant	Merchant id obtained after registering your bundle id.	True	`Dictionary`	`let merchant:[String:String] = ["id":""]`
customer	Customer details for charge process.	True	`Dictionary`	`let customer:[String:Any] = ["id":"", "name":[["lang":"en","first":"TAP","middle":"","last":"PAYMENTS"]], "contact":["email":"[email protected]", "phone":["countryCode":"+965","number":"88888888"]]]`
interface	Look and feel related configurations (optional).	False	`Dictionary`	`let interface:[String:String] = ["locale": "en", "theme": "light", "edges": "curved", "colorStyle": "colored", "loader": true]`
post	Webhook for server-to-server updates (optional).	False	`Dictionary`	`let post:[String:String] = ["url":""]`

Initialisation of the input

You can use a Dictionary to send data to our SDK. The benefit is that you can generate this data from one of your APIs. If we make updates to the configurations, you can update your API, avoiding the need to update your app on the App Store.

  /// The   configuration dictionary
  let parameters: [String: Any] =  
  [
      "operator": ["publicKey": "pk_test_6jdl4Qo0FYOSXmrZTR1U5EHp", "hashString": ""],
      "scope": "charge",
      "transaction": [
        "authentication": true,
        "authorize": [
          "type": "VOID",
          "time": 12,
        ],
        "paymentAgreement": [
          "id": "",
          "contract": ["id": ""],
        ],
        "reference": "trx",
        "metadata": [:],
      ],
      "order": [
        "id": "",
        "amount": 0.1,
        "currency": "KWD",
        "description": "Authentication description",
        "reference": "ordRef",
        "metadata": [:],
      ],
      "invoice": ["id": ""],
      "merchant": ["id": ""],
      "customer": [
        "id": "",
        "name": [["lang": "en", "first": "TAP", "middle": "", "last": "PAYMENTS"]],
        "contact": [
          "email": "[email protected]",
          "phone": ["countryCode": "+965", "number": "88888888"],
        ],
      ],
      "interface": [
        "locale": "en",
        "theme": UIView().traitCollection.userInterfaceStyle == .dark ? "dark" : "light",
        "edges": "curved",
        "colorStyle": UIView().traitCollection.userInterfaceStyle == .dark
          ? "monochrome" : "colored",
        "loader": true,
      ],
      "post": ["url": ""],
    ]

Receiving Callback Notifications (Advanced Version)

The below will allow the integrators to get notified from events fired from the PayButton.

  ///  Will be fired whenever there is an error related to the button connectivity or apis
  ///  - Parameter  data: includes a JSON format for the error description and error
  func onError(data: String) {
	print("\n\n========\n\nonError \(data))")
  }
	///  Will be fired whenever the charge is completed, regardless of its status.
	///  - Parameter  data: includes a JSON format for the charge details
  func onSuccess(data: String) {
	print("\n\n========\n\nonSuccess \(data))")
  }

	///  Will be fired whenever the order is created. use it, if you want to retrieve its data from your backend for state manegement purposes
	///  - Parameter  data: Order id.
  func onOrderCreated(data: String) {
	print("\n\n========\n\nonOrderCreated \(data))")
  }
	///  Will be fired whenever the charge is created. use it, if you want to retrieve its data from your backend for state manegement purposes
	///  - Parameter  data: json data representing the charge model.

  func onChargeCreated(data: String) {
	print("\n\n========\n\nonChargeCreated \(data))")
  }
  ///  Will be fired whenever the pay button is rendered and loaded
  func onReady() {
    print("\n\n========\n\nonReady")
  }
  ///  Will be fired whenever the customer clicked on the benefit pay button. Now the button will be in loading state to render the pay popup
  func onClicked() {
    print("\n\n========\n\nonClicked")
  }
  
  ///  Will be fired whenever the customer cancels the payment. This will reload the button once again
  func onCanceled() {
    print("\n\n========\n\nonCanceled")
  }

Full Code Sample

Once all of the above steps are successfully completed, your UIViewController file should look like this:

import Pay_Button_iOS
import UIKit

class ViewController: UIViewController {

  var payButton: PayButtonView = .init()

  /// The minimum needed configuration dictionary
  let parameters: [String: Any] =
    [
      "operator": ["publicKey": "pk_test_6jdl4Qo0FYOSXmrZTR1U5EHp", "hashString": ""],
      "scope": "charge",
      "transaction": [
        "authentication": true,
        "authorize": [
          "type": "VOID",
          "time": 12,
        ],
        "paymentAgreement": [
          "id": "",
          "contract": ["id": ""],
        ],
        "reference": "trx",
        "metadata": [:],
      ],
      "order": [
        "id": "",
        "amount": 0.1,
        "currency": "KWD",
        "description": "Authentication description",
        "reference": "ordRef",
        "metadata": [:],
      ],
      "invoice": ["id": ""],
      "merchant": ["id": ""],
      "customer": [
        "id": "",
        "name": [["lang": "en", "first": "TAP", "middle": "", "last": "PAYMENTS"]],
        "contact": [
          "email": "[email protected]",
          "phone": ["countryCode": "+965", "number": "88888888"],
        ],
      ],
      "interface": [
        "locale": "en",
        "theme": UIView().traitCollection.userInterfaceStyle == .dark ? "dark" : "light",
        "edges": "curved",
        "colorStyle": UIView().traitCollection.userInterfaceStyle == .dark
          ? "monochrome" : "colored",
        "loader": true,
      ],
      "post": ["url": ""],
    ]

  override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    addButtonView()
    payButton.initPayButton(configDict: self.parameters, delegate: self, payButtonType: .BenefitPay)
  }

  func addButtonView() {
    // Add it as a subview
    view.addSubview(payButton)
    // Make it adjusts to constraints at run time
    payButton.translatesAutoresizingMaskIntoConstraints = false
    // Set the constraints as recommended by us to have full width + leading & trailing paddings.
    // Let us center vertically for demo purposes
    // Height is to be set to 48
    NSLayoutConstraint.activate([
      payButton.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 10),
      payButton.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: -10),
      payButton.centerYAnchor.constraint(equalTo: self.view.centerYAnchor),
    ])
  }

}

extension ViewController: PayButtonDelegate {
  func onError(data: String) {
    //print("CardWebSDKExample onError \(data)")
    print("\n\n========\n\nonError \(data)")
  }

  func onSuccess(data: String) {
    print("\n\n========\n\nonSuccess \(data)")
  }

  func onOrderCreated(data: String) {
    //print("CardWebSDKExample onError \(data)")
    print("\n\n========\n\nonOrderCreated \(data)")
  }

  func onChargeCreated(data: String) {
    //print("CardWebSDKExample onError \(data)")
    print("\n\n========\n\nonChargeCreated \(data)")
  }

  func onReady() {
    //print("CardWebSDKExample onReady")
    print("\n\n========\n\nonReady")
  }

  func onClicked() {
    //print("CardWebSDKExample onFocus")
    print("\n\n========\n\nonClicked")
  }

  func onCanceled() {
    print("\n\n========\n\nonCanceled")
  }
}

Parameters Reference

Below you will find more details about each parameter shared in the above tables that will help you easily integrate PayButton-iOS SDK.

operator

Definition: It links the payment gateway to your merchant account with Tap, in order to know your business name, logo, etc...
Type: string (required)
Fields:
- publicKey
  Definition: This is a unique public key that you will receive after creating an account with Tap which is considered a reference to identify you as a merchant. You will receive 2 public keys, one for sandbox/testing and another one for production.
Example:

let operator:[String:Any]: ["publicKey":"pk_test_YhUjg9PNT8oDlKJ1aE2fMRz7", "hashString":""]

scope

Definition: The scope of the current charge.
Type: string (optional)
Values:
- charge
  Definition: The scope/intention of the current order to charge the customer. Default
- authorize
  Definition: The scope/intention of the current order to authorize an amount from the customer.
Example:

let scope:string= "charge"

order

Definition: This defined the details of the order that you are trying to purchase, in which you need to specify some details like the id, amount, currency ...
Type: Dictionary, (required)
Fields:
- id
  Definition: Pass the order ID created for the order you are trying to purchase, which will be available in your database.
  Note: This field can be empty
- currency
  Definition: The currency which is linked to the order being paid.
- amount
  Definition: The order amount to be paid by the customer.
  Note: Minimum amount to be added is 0.1.
- description
  Definition: Order details, which defines what the customer is paying for or the description of the service you are providing.
- reference
  Definition: This will be the order reference present in your database in which the paying is being done for.
Example:

let order: [String: String] = [
    "id": "", "amount": 1, "currency": "SAR", "description": "Authentication description",
    "reference": "",
  ]

transaction

Definition: This defined the details of the order that you are trying to purchase, in which you need to specify some details like the reference, scope...
Type: Dictionary, (optional)
Fields:
- authentication
  Definition: If true, this means that the payment will not be accepted if it is card based and the card is not supporting 3DS.
  Note: Default is true.
- authorize
  Definition: Defines the authorize details if the scope is set to authorize. Note, that not all buttons support authorize scope.
  - Fields:
    - type:
      - Definition: An enum to define the post action of the authorize.
      - Values:
        
        VOID // Will release the held amount
        
        CAPTURE // Will charge the held amount
    - time:
      - Definition: An hour based time to perform the post authorize action.
- paymentAgreement
  Definition: If you have created an agreement before, and you want to use it in this transaction pass its id here. Note: It can be empty. Only, related to card based buttons.
- reference
  Definition: This will be the transaction reference present in your database in which the paying is being done for.
Example:

let transaction: [String: Any] = [
  "authentication": true,
  "authorize": [
    "type": "VOID",
    "time": 12,
  ],
  "paymentAgreement": [
    "id": "",
    "contract": ["id": ""],
  ],
  "reference": "trx",
  "metadata": [:],
]

merchant

Definition: It is the Merchant id that you get from our onboarding team. This will be used as reference for your account in Tap.
Type: Dictionary (required)
Fields:
- id
  Definition: Generated once your account with Tap is created, which is unique for every merchant.
  Example:

	let merchant:[String:String] = ["id":""]

invoice

Definition: After the token is generated, you can use it to pay for any invoice. Each invoice will have an invoice ID which you can add here using the SDK.
Note: An invoice will first show you a receipt/summary of the order you are going to pay for as well as the amount, currency, and any related field before actually opening the payment form and completing the payment.
Type: Dictionary (optional)
Fields:
- id
  Definition: Unique Invoice ID which we are trying to pay.
  Example:

let invoice:[String:String] = ["id":""]

customer

Definition: Here, you will collect the information of the customer that is paying..
Type: Dictionary (required)
Fields:
- id
  Definition: This is an optional field that you do not have before the charge is processed. But, after the charge, then you will receive the customer ID in the response which can be handled in the onSuccess callback function.
- name
  Definition: Full Name of the customer paying.
  Fields:
  1. lang
    Definition: Language chosen to write the customer name.
  2. first
    Definition: Customer's first name.
  3. middle
    Definition: Customer's middle name.
  4. last
    Definition: Customer's last name.
- contact
  Definition: The customer's contact information like email address and phone number.
  Note: The contact information has to either have the email address or the phone details of the customers or both but it should not be empty.
  Fields:
  1. email
    Definition: Customer's email address
    Note: The email is of type string.
  2. phone
    Definition: Customer's Phone number details
    1. countryCode
    2. number
Example:

let customer: [String: Any] = [
      "id": "", "name": [["lang": "en", "first": "TAP", "middle": "", "last": "PAYMENTS"]],
      "contact": [
        "email": "[email protected]", "phone": ["countryCode": "+965", "number": "88888888"],
      ],
    ]

interface

Definition: This will help you control the layout (UI) of the payment form, like changing the theme light to dark, the language used (en or ar), ...
Type: Dictionary (optional)
Fields:
- loader
  Definition: A boolean to indicate wether or not you want to show a loading view on top of the benefit button while it is performing api requests.
- locale
  Definition: The language of the pay button. Accepted values as of now are:
  Possible Values:
  1. en(for english)
  2. ar(for arabic).
- theme
  Definition: The display styling of the pay button. Accepted values as of now are:
  Options:
  1. light
  2. dark
  3. dynamic ( follow the device's display style )
- edges
  Definition: Control the edges of the payment form.
  Possible Values:
  1. curved
  2. flat
- colorStyle
  Definition: How do you want the icons rendered inside the pay button Possible Values:
  1. colored
  2. monochrome
Example:

let interface: [String: String] = [
      "locale": "en", "theme": "light", "edges": "curved",
      "colorStyle": "colored", "loader": true,
    ]

post

Definition: Here you can pass the webhook URL you have, in order to receive notifications of the results of each Transaction happening on your application.
Type: Dictionary (optional)
Fields:
- url
  Definition: The webhook server's URL that you want to receive notifications on.
  Example:

let post:[String:String] = ["url":""]

Available Button Types

BenefitPay
KNET
Benefit
FAWRY
PAYPAL
TABBY
GOOGLEPAY

Generate the hash string

Import the Crypto import CryptoKit
Copy this helper method code

/**
     This is a helper method showing how can you generate a hash string when performing live charges
     - Parameter publicKey:             The Tap public key for you as a merchant pk_.....
     - Parameter secretKey:             The Tap secret key for you as a merchant sk_.....
     - Parameter amount:                The amount you are passing to the SDK, ot the amount you used in the order if you created the order before.
     - Parameter currency:              The currency code you are passing to the SDK, ot the currency code you used in the order if you created the order before. PS: It is the capital case of the 3 iso country code ex: SAR, KWD.
     - Parameter post:                  The post url you are passing to the SDK, ot the post url you pass within the Charge API. If you are not using postUrl please pass it as empty string
     - Parameter transactionReference:  The reference.trasnsaction you are passing to the SDK(not all SDKs supports this,) or the reference.trasnsaction  you pass within the Charge API. If you are not using reference.trasnsaction please pass it as empty string
     */
    func generateTapHashString(publicKey:String, secretKey:String, amount:Double, currency:String, postUrl:String = "", transactionReference:String = "") -> String {
        // Let us generate our encryption key
        let key = SymmetricKey(data: Data(secretKey.utf8))
		// For amounts, you will need to make sure they are formatted in a way to have the correct number of decimal points. For BHD we need them to have 3 decimal points
	    // We will need to format it based on the currency's decimal points
	    let numberFormatter = NumberFormatter()
	    numberFormatter.numberStyle = .currency
	    numberFormatter.currencySymbol = ""
	    numberFormatter.currencyCode = currency
	    let formattedAmount: String = numberFormatter.string(for: amount) ?? ""
        // Let us format the string that we will hash
        let toBeHashed = "x_publickey\(publicKey)x_amount\(formattedAmount)x_currency\(currency)x_transaction\(transactionReference)x_post\(postUrl)"
        // let us generate the hash string now using the HMAC SHA256 algorithm
        let signature = HMAC<SHA256>.authenticationCode(for: Data(toBeHashed.utf8), using: key)
        let hashedString = Data(signature).map { String(format: "%02hhx", $0) }.joined()
        return hashedString
    }

Call it as follows:

let hashString:String = generateTapHashString(publicKey: publicKey, secretKey: secretString, amount: amount, currency: currency, postUrl: postUrl, transactionReference: transactionReference)

Pass it within the operator model

let operatorModel:[String:String] = ["publicKey": "pk_test_HJN863LmO15EtDgo9cqK7sjS", "hashString": hashString]

Name		Name	Last commit message	Last commit date
Latest commit History 13 Commits
.swiftpm/xcode		.swiftpm/xcode
PayButtonSDK		PayButtonSDK
Sources/Pay-Button-iOS		Sources/Pay-Button-iOS
Tests/Pay-Button-iOSTests		Tests/Pay-Button-iOSTests
LICENSE		LICENSE
Package.resolved		Package.resolved
Package.swift		Package.swift
Pay-Button-iOS.podspec		Pay-Button-iOS.podspec
README.md		README.md

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Tap-Payments/Pay-Button-iOS

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Pay-Button-iOS

Introduction

Sample Demo

Step 1: Requirements

Step 2: Get Your Public Keys

Step 3: Installation

Swift Package Manager

CocoaPods

Step 4: Integrating Pay-Button-iOS

Integration Flow

Initialising the UI

Using Storyboard

Using Code to create the PayButtonView

Simple Integration

Parameters

Configuring the Pay-Button-iOS SDK

Receiving Callback Notifications

Advanced Integration

Parameters

Initialisation of the input

Receiving Callback Notifications (Advanced Version)

Full Code Sample

Parameters Reference

operator

scope

order

transaction

merchant

invoice

customer

interface

post

Available Button Types

Generate the hash string

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