Flutter SDK

Integrating PayHere with your Flutter App is super easy with our PayHere Flutter SDK. You just have to include the package in your project dependencies, call its methods to initiate a payment and fetch the payment status just after the payment. The beauty is, this SDK allows you to accept a payment within your app, without redirecting your app user to the web browser.

Usage

1. Include PayHere Mobile SDK in your App

Open your Flutter project's pubspec.yaml file and add the PayHere Flutter SDK dependency.

dependencies:
  payhere_mobilesdk_flutter: ^1.0.0

Then run the following commands in your Flutter project directory.

flutter pub get

2. Android Pre-requisites

a. Add the PayHere Android SDK's Maven repository

Open up the (outermost) build.gradle file in your Android project and add the repository.

allprojects {
    repositories {
        mavenLocal()
        maven {
            url  "https://dl.bintray.com/payhere/payhere-android-payment"
        }
    }
}

b. Allow Manifest attribute merge

Open up the AndroidManifest.xml file in your Anrdoid project and make the following changes.

i. Declare the Android tools namespace in the <manifest> element.

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.domain.name"
    xmlns:tools="http://schemas.android.com/tools">

ii. Add the replace merge rule for the android:allowBackup attribute in the <application> element.

<application tools:replace="android:allowBackup">

3. iOS Pre-requisites

Run the following command in your iOS Project.

pod install

4. Whitelist Mobile App Package Name

a. Login to your PayHere Merchant Account and navigate to Settings > Domains and Credentials.

b. Click the 'Add Domain/App' button.

c. Select 'App' from the first dropdown.

d. Add your Flutter App package name (e.g. lk.bhasha.helakuru).

e. Take note of the hash value in the last field. This is your Merchant Secret for this specific mobile App. You will need this in Step 5.

f. Click 'Request to Approve'.

If you are using a PayHere Live Merchant Account, your App Package Name must be manually reviewed by our operations team. Please allow upto a day for this review process to complete.

For more information, please contact techsupport@payhere.lk

5. Initiate a Payment Request to PayHere Payment Gateway ###

a. One-time Payment Request

Creates a one-time payment request charged only once. To capture the payment details from your server, read our docs.

import 'package:payhere_mobilesdk_flutter/payhere_mobilesdk_flutter.dart';

Map paymentObject = {
  "sandbox": true,                 // true if using Sandbox Merchant ID
  "merchant_id": "1211149",        // Replace your Merchant ID
  "merchant_secret": "xyz",        // See step 4e
  "notify_url": "http://sample.com/notify",
  "order_id": "ItemNo12345",
  "items": "Hello from Flutter!",
  "amount": "50.00",
  "currency": "LKR",
  "first_name": "Saman",
  "last_name": "Perera",
  "email": "samanp@gmail.com",
  "phone": "0771234567",
  "address": "No.1, Galle Road",
  "city": "Colombo",
  "country": "Sri Lanka",
  "delivery_address": "No. 46, Galle road, Kalutara South",
  "delivery_city": "Kalutara",
  "delivery_country": "Sri Lanka",
  "custom_1": "",
  "custom_2": ""
};  

PayHere.startPayment(
  paymentObject, (paymentId) {
    print("One Time Payment Success. Payment Id: $paymentId");
  }, (error) { 
    print("One Time Payment Failed. Error: $error");
  }, () { 
    print("One Time Payment Dismissed");
  }
);
b. Recurring Payment Request

Creates a subscription payment that is charged at a fixed frequency. To capture the payment details from your server, read our docs.

Read more about Recurring Payments in our docs.

import 'package:payhere_mobilesdk_flutter/payhere_mobilesdk_flutter.dart';

Map paymentObject = {
  "sandbox": true,                 // true if using Sandbox Merchant ID
  "merchant_id": "1211149",        // Replace your Merchant ID
  "merchant_secret": "xyz",        // See step 4e
  "notify_url": "http://sample.com/notify",
  "order_id": "ItemNo12345",
  "items": "Hello from Flutter!",
  "amount": "50.00",
  "recurrence": "1 Month",         // Recurring payment frequency
  "duration": "1 Year",            // Recurring payment duration
  "currency": "LKR",
  "first_name": "Saman",
  "last_name": "Perera",
  "email": "samanp@gmail.com",
  "phone": "0771234567",
  "address": "No.1, Galle Road",
  "city": "Colombo",
  "country": "Sri Lanka",
  "delivery_address": "No. 46, Galle road, Kalutara South",
  "delivery_city": "Kalutara",
  "delivery_country": "Sri Lanka",
  "custom_1": "",
  "custom_2": ""
};

PayHere.startPayment(
  paymentObject, (paymentId) {
    print("Recurring Payment Success. Payment Id: $paymentId");
  }, (error) { 
    print("Recurring Payment Failed. Error: $error");
  }, () { 
    print("Recurring Payment Dismissed");
  }
);
c. Preapproval Request

Tokenize customer card details for later usage with the PayHere Charging API. To capture the payment details from your server, read our docs.

Read more about Automated Charging in our docs.

import 'package:payhere_mobilesdk_flutter/payhere_mobilesdk_flutter.dart';

Map paymentObject = {
  "sandbox": true,                 // true if using Sandbox Merchant ID
  "preapprove": true,              // Required
  "merchant_id": "1211149",        // Replace your Merchant ID
  "merchant_secret": "xyz",        // See step 4e
  "notify_url": "http://sample.com/notify",
  "order_id": "ItemNo12345",
  "items": "Hello from Flutter!",
  "currency": "LKR",
  "first_name": "Saman",
  "last_name": "Perera",
  "email": "samanp@gmail.com",
  "phone": "0771234567",
  "address": "No.1, Galle Road",
  "city": "Colombo",
  "country": "Sri Lanka",
};

PayHere.startPayment(
  paymentObject, (paymentId) {
    print("Tokenization Payment Success. Payment Id: $paymentId");
  }, (error) { 
    print("Tokenization Payment Failed. Error: $error");
  }, () { 
    print("Tokenization Payment Dismissed");
  }
);

FAQ

What versions of Flutter are supported?

Flutter versions above 1.20.0 are supported.

What versions of iOS are supported?

The iOS component for this SDK supports iOS Versions above 11.0.

What versions of Android are supported? ####

The Android component for this SDK supports Android Versions above API Level 17.

What are the parameters for the PayHere.startPayment method?

PayHere.startPayment(
  paymentObject, 
  onCompletedHandler,
  onErrorHandler,
  onDismissedHandler
);
  • paymentObject - Object The payment parameters as a Map<String, dynamic>.

  • onCompletedHandler - Function Called with the PayHere Payment ID (String) as a parameter, for succesful payments.

  • onErrorHandler - Function Called with the Error (String) as a parameter, when an error occurs.

  • onDismissedHandler - Function Called with no parameters, when the payment popup is closed before payments are processed.

How to get payment details such as payment method, status, card holder etc.?

You must setup a Server Endpoint that accepts the asynchronous PayHere Payment Notification POST request, and pass its URL to the notify_url parameter of the paymentObject.

Each payment request type (one-time/recurring/pre-approval) sends a different payment notification. Study the following sections for more information.

I have a different question. Where should I raise my issues?

  1. You can raise issues directly at the Issues section for the SDK's GitHub page.
  2. You can contact a PayHere Developer for technical support by mailing your issue and relevant code/screenshots to techsupport@payhere.lk

Libraries

payhere_mobilesdk_flutter