Integrate UPI Payment Gateway Using SDK In Flutter

Prepare to boost the revenue of your app by using the most secure and reliable payment system. Follow this step-by-step guide and begin accepting payments with ease!

This blog will discuss the integration of UPI Payment Gateway Utilizing SDK In Flutter. We will also create a demonstration program, and explore ways to integrate the UPI payment gateways using SDK within your Flutter application.

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Introduction

In the current fast-paced world of digital providing secure and seamless payment options in the mobile application is vital to enhance user experience while driving growth for businesses. In the past, Unified Payments Interface (UPI) has revolutionized the way we pay for digital transactions in India and provides a quick and effective way for customers to transfer funds and pay payments immediately. By adding an UPI payment gateway in Flutter allows your users to perform easy transactions, whether it’s to purchase products, pay bills or for transferring money.

This detailed article will guide you through the steps of adding an UPI payment gateway in your Flutter application. No matter if you’re a veteran developer or are just beginning to get started using Flutter, this article will give you step-by-step directions and the best practices to set up UPI payments with success. After reading this article you’ll have a thorough knowledge of how to provide an effortless payment experience for your customers while maintaining the highest security standards.

Understanding UPI and its Significance

Unified Payment Interface (UPI) is a revolutionary system for payment that lets users connect multiple banks to a single mobile app. This allows seamless transfer of funds as well as transactions between individuals and companies, eliminating the requirement for traditional banking techniques.

UPI is available 24/7, which enables immediate transfers. It is gaining immense recognition due to its ease of use and security. The integration of UPI to your Flutter application allows customers to conduct transactions without hassle which improves the level of satisfaction and engagement of customers. This section will give you an in-depth review of UPI as well as its function and the reasons it’s a game changer in the field of digital payments.

Choosing the Right UPI SDK

The selection of a suitable UPI Software Development Kit (SDK) is essential. Check out SDK alternatives like Paytm, Razorpay, and BharatPe and evaluate aspects such as the complexity of integration, the quality of documentation as well as community support and compatibility with the Flutter project.

Setting Up Your Flutter Project

Start your Flutter project by either creating a new app or by modifying an existing app. Make sure you have Flutter installed, as is Dart. both installed and then configure your project with the dependencies required within pubspec.yaml. pubspec.yaml file.

Gradle Setup

In the build.gradle of the app module, add this dependency below to install the EasyUpiPayment libraries into the application.

                        
                            dependencies {
                                implementation "dev.shreyaspatil.EasyUpiPayment:EasyUpiPayment:3.0.3"
                             }
                             
                        
                        

debugConfig, update the minSdkVersion to 19

                    
                        dependencies {
                            implementation "dev.shreyaspatil.EasyUpiPayment:EasyUpiPayment:3.0.3"
                         }
                         
                    
                 

Installing the UPI SDK

• Integrate your chosen UPI SDK into your project by adding the SDK dependency to the pubspec.yaml file.
• I used easy_upi_payment for the demo project.
• Run the flutter pub command to install the dependency, making the SDK’s functionalities available in your Flutter app.

                    
                        dependencies:
                        flutter:
                          sdk: flutter
                       easy_upi_payment: 
                         
                    
                    

The startPayment() method is likely designed to initiate a UPI payment transaction within a Flutter app.

                    
                        ref.read(mainStateProvider.notifier).startPayment(
                            EasyUpiPaymentModel(
                              payeeVpa: payeeVpaController.text,
                              payeeName: payeeNameController.text,
                              amount: double.parse(amountController.text),
                              description: descriptionController.text,
                            ),
                          );
                       
                    
                    

We pass an object of EasyUpiPaymentModel as a parameter of the startPayment() method.

                    
                        class EasyUpiPaymentModel 
                        {
                        final String payeeVpa;
                         final String payeeName;
                         final String? payeeMerchantCode;
                         final String? transactionId;
                         final String? transactionRefId;
                         final String? description;
                         final double amount;
                         const EasyUpiPaymentModel({
                           required this.payeeVpa,
                           required this.payeeName,
                           required this.amount,
                           required this.description,
                           this.payeeMerchantCode,
                           this.transactionId,
                           this.transactionRefId,
                         });
                        }
                        
                    
                    

TransactionDetailModel as the return from the startPayment() method.

                    
                        Future startPayment(
                            EasyUpiPaymentModel easyUpiPaymentModel,
                           ) {
                            throw UnimplementedError('startPayment() has not been implemented.');
                           }
                           
                    

TransactionDetailModel

                    
                        class TransactionDetailModel {
                            final String? transactionId;
                            final String? responseCode;
                            final String? approvalRefNo;
                            final String? transactionRefId;
                            final String? amount;
                          
                          const TransactionDetailModel({
                            required this.transactionId,
                            required this.responseCode,
                            required this.approvalRefNo,
                            required this.transactionRefId,
                            required this.amount,
                          });
                          }
                         
                         
                         
                           
                    

Parameters Of TransactionDetailModel

We are able to modify and use these fields according to our particular requirements within our interface for users. This is why the UPI payment system has been effortlessly integrated in our Android application, which ensures an efficient and smooth user experience .