A Flutter plugin for making payments via Paystack Payment Gateway - Compatible on Android, iOS and Web.

Special Features

  • Split payment

  • Subscription payment

Other Features

  • Mobile Money

  • VISA

  • Bank

  • Bank Transfer

  • USSD

  • QR

  • Split Payments

  • Subscriptions

Getting started

Before getting started, ensure you have successfully created an account on paystack and you have your public key ready. Vist paystack.com to setup your account.

A. FOR WEB COMPATIBILITY: Ensure you do the following

  1. Create a file on your web folder and call it "paystack_interop.js"

  2. Copy and paste the code below on the created folder

function paystackPopUp(publicKey, email, amount, ref,plan,currency, onClosed, callback) {
  let handler = PaystackPop.setup({
    key: publicKey,
    email: email,
    amount: amount,
    ref: ref,
    plan: plan,
    currency: currency,
    onClose: function () {
      alert("Window closed.");
      onClosed();
    },
    callback: function (response) {
      callback();
      let message = "Payment complete! Reference: " + response.reference;
      alert(message);
    },
  });
  return handler.openIframe();
}
  1. In your web/index.html file add the following code at the top of the body tag section
<body>
<script src="https://js.paystack.co/v1/inline.js"></script>
<script src="paystack_interop.js"></script>
...
...
</body>

Split Payments

You can split your payment into single or multiple subaccounts.

Here is how you can do that:

  • Single Split Payment

In your "paystack_interop.js" file, you can add:

 let handler = PaystackPop.setup({
        key: publicKey,
        email: email,
        amount: amount,
        ref: ref,
        currency: currency,
        onClose: function () {
            alert("Window closed.");
            onClosed();
        },
        callback: function (response) {
            callback();
            let message = "Payment complete! Reference: " + response.reference;
            alert(message);
        },
        //* NEW LINES
        //* Required
        subaccount: "<CODE_ID_OF_SUBACCOUNT>"  // It looks like "ACCT_osl1da48je0lez6"
        //* Optional
        transaction_charge: "2500" // If you want to override the percentage and use the flat fee.
        //* Optional
        bearer: "subaccount" // Decide who will bear Paystack transaction charges between account and subaccount. Defaults to account
        //* End of Subaccount
          });
    return handler.openIframe();
  • Multi Split Payment

In your "paystack_interop.js" file, you can add:

 let handler = PaystackPop.setup({
        key: publicKey,
        email: email,
        amount: amount,
        ref: ref,
        currency: currency,
        onClose: function () {
            alert("Window closed.");
            onClosed();
        },
        callback: function (response) {
            callback();
            let message = "Payment complete! Reference: " + response.reference;
            alert(message);
        },
        //* NEW LINES
        //* Required
        split_code: "<CODE_ID_OF_SUBACCOUNT>"  // It looks like "SPL_98WF13Eb3w. The split code of the transaction split"
        //* End of Subaccount
          });
    return handler.openIframe();

Subscriptions

You can also get subscription payments also.

Here is how you can do that: In your "paystack_interop.js" file, you can add:

 let handler = PaystackPop.setup({
        key: publicKey,
        email: email,
        amount: amount,
        ref: ref,
        currency: currency,
        onClose: function () {
            alert("Window closed.");
            onClosed();
        },
        callback: function (response) {
            callback();
            let message = "Payment complete! Reference: " + response.reference;
            alert(message);
        },
        //* NEW LINES
        //* Required
        plan: "<PLAN_CODE>"  // Plan code generated from creating a plan. This makes the payment become a subscription payment
        //* Optional
        quantity: "10" // Used to apply a multiple to the amount returned by the plan code above.
        //* End of Subaccount
          });
    return handler.openIframe();

B. FOR ANDROID COMPATIBILITY: Ensure your minSdkVersion is 19 or higher

defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId '...'
        minSdkVersion 19 // Ensure this line is 19 or higher
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

C. NO SETUP REQUIRED for iOS

Some important parameters

  • publicKey is required for web only
  • secretKey is required for Mobile only
  • context is required for Mobile only
  • amount should be multiplied by 100 eg amount * 100
  • onClose is called when the user cancels a transaction or when there is a failed transaction
  • onSuccess is called on successful transactions
  • callBackURL is required for Mobile only. Users are redirected to this URL after payment is successful, this helps close the session. The URL is setup in your Dashboard and then provided here.
  • plan is for options of making payments to plan subscriptions
  • currency is the payment currency of amount. Defaults to NGN i.e Naira.

Usage

     FlutterPaystackPlus.openPaystackPopup(
      publicKey: '-Your-public-key-',
      customerEmail: 'youremail@gmail.com',
      context:context,
      secretKey:'-Your-secret-key-',
      plan:'-Your-plan-configured-from-your-dashboard-',
      amount: (amount * 100).toString(),
      reference: DateTime.now().millisecondsSinceEpoch.toString(),
      callBackUrl: "[GET IT FROM YOUR PAYSTACK DASHBOARD]",
      onClosed: () {
        debugPrint('Could\'nt finish payment');
      },
      onSuccess: () async {
        debugPrint('successful payment');
      },
    );

Contributor(s)

I would like to express my appreciation to Daniel Kabu Asare for his invaluable work on the pay_with_paystack package, which provided the foundational insights for building the mobile platform of this package.

I extend my gratitude to George Ikwegbu Chinedu for his significant contributions to this project, particularly for enhancing the subscription functionalities tailored for mobile platforms.

I would like to express my gratitude to Jeremiah Oluwaseun Erinola for his invaluable contribution, which laid the foundation for implementing the split payment and subscription functionalities.

Special thanks to Kelvin Osei Poku for expanding the currency option to the web

Additional information

Please feel very free to contribute. Experienced an issue or want to report a bug? Please, feel free to report it. Remember to be as descriptive as possible. Thank you.

Libraries

flutter_paystack_plus