Fixed 'Unhandled Exception: type 'Null' is not a subtype of type 'FutureOr<ChargeResponse>''

README.md

@@ -1,49 +1,61 @@
 
 <p align="center">  
-   <img title="Flutterwave" height="200" src="https://flutterwave.com/images/logo-colored.svg" width="50%"/>  
+   <img title="Flutterwave" height="200" src="https://flutterwave.com/images/logo/full.svg" width="50%"/>
 </p>  
 
-# Flutterwave Flutter Standard SDK
+# Flutterwave Flutter SDK (Standard)
 
-## Table of Contents
+The Flutter library helps you create seamless payment experiences in your dart mobile app. By connecting to our modal, you can start collecting payment in no time.
 
-- [About](#about)
-- [Getting Started](#getting-started)
-- [Usage](#usage)
-- [Deployment](#deployment)
-- [Built Using](#build-tools)
-- [References](#references)
-- [Support](#support)
 
-<a id="about"></a>
-## About
-Flutterwave's Flutter SDK is Flutterwave's offical flutter sdk to integrate Flutterwave's [Standard](https://developer.flutterwave.com/docs/flutterwave-standard) payment into your flutter app. It comes with a ready made Drop In UI.
+Available features include:
 
+- Collections: Card, Account, Mobile money, Bank Transfers, USSD, Barter.
+- Recurring payments: Tokenization and Subscriptions.
+- Split payments
 
 
-<a id="getting-started"></a>
+## Table of Contents
 
-## Getting Started
+1. [Requirements](#requirements)
+2. [Installation](#installation)
+3. [Usage](#usage)
+4. [Support](#support)
+5. [Contribution guidelines](#contribution-guidelines)
+6. [License](#license)
 
-These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See [deployment](#deployment) for notes on how to deploy the project on a live system.  
-See [references](#references) for links to dashboard and API documentation.
 
 ## Requirements
-- Ensure you have your test (and live) [API keys](https://developer.flutterwave.com/docs/api-keys).   
-  ``` Flutter version >= 1.17.0 Flutterwave version 3 API keys ```
 
-## Installation Add the dependency
+1. Flutterwave for business [API Keys](https://developer.flutterwave.com/docs/integration-guides/authentication)
+2. Supported Flutter version >= 1.17.0
+
+
+## Installation
 
-In your `pubspec.yaml` file add:
+1. Add the dependency to your project. In your `pubspec.yaml` file add: `flutterwave_standard: 1.0.2`
+2. Run `flutter pub get`
 
-1. `flutterwave_standard: ^1.0.4`
-2. run `flutter pub get`  
-   <a id="usage"></a>
 
 ## Usage
 
-Create a `Flutterwave` instance by calling the constructor `Flutterwave` The constructor accepts a mandatory instance of the following:  
-the calling `Context` , `publicKey`, `Customer`, `amount`, `currency`, `email`, `fullName`, `txRef`, `isDebug`, `paymentOptions`, and `Customization` . It returns an instance of `Flutterwave` which we then call the `async` method `.charge()` on.
+### Initializing a Flutterwave instance
+
+To create an instance, you should call the Flutterwave constructor. This constructor accepts a mandatory instance of the following:
+
+- The calling `Context`
+-  `publicKey`
+-  `Customer`
+-  `amount`
+-  `currency`
+-  `email`
+-  `fullName`
+-  `txRef`
+-  `isDebug`
+-  `paymentOptions`
+-  `Customization` 
+
+It returns an instance of Flutterwave which we then call the async method `.charge()` on.
 
     _handlePaymentInitialization() async { 
     final style = FlutterwaveStyle(
@@ -86,10 +98,9 @@ the calling `Context` , `publicKey`, `Customer`, `amount`, `currency`, `email`,
 		    ); 
 		} 
 
-### 2. Handle the response
+### Handling the response
 
-Calling the `.charge()` method returns a `Future`  
-of `ChargeResponse` which we await for the actual response as seen above.
+Calling the `.charge()` method returns a Future of `ChargeResponse` which we await for the actual response as seen above.
 
 
 
@@ -105,45 +116,34 @@ of `ChargeResponse` which we await for the actual response as seen above.
 	  // User cancelled 
 	 }
 
-#### Please note that:
-- `ChargeResponse` can be null, depending on if the user cancels  
-  the transaction by pressing back.
-- You need to check the status of the transaction from the instance of `ChargeResponse` returned from calling `.charge()`, the `status`, `success` and `txRef` are successful and correct before providing value to the customer
+#### Note
 
->  **PLEASE NOTE**
+ 1. `ChargeResponse` can be null if a user cancels the transaction by pressing back.
+ 2. You need to confirm the transaction is succesful. Ensure that the txRef, amount, and status are correct and successful. Be sure to [verify the transaction details](https://developer.flutterwave.com/docs/verifications/transaction) before providing value.
 
-> We advise you to do a further verification of transaction's details on your server to be sure everything checks out before providing service.  
-<a id="deployment"></a>
 
+## Support
 
-##Testing
-`pub run test`
+For additional assistance using this library, contact the developer experience (DX) team via [email](mailto:[email protected]) or on [slack](https://bit.ly/34Vkzcg). 
 
-## Debugging Errors
-We understand that you may run into some errors while integrating our library. You can read more about our error messages [here](https://developer.flutterwave.com/docs/integration-guides/errors).
+You can also follow us [@FlutterwaveEng](https://twitter.com/FlutterwaveEng) and let us know what you think 😊.
 
-For `authorization` and `validation` error responses, double-check your API keys and request. If you get a `server` error, kindly engage the team for support.
 
-<a id="support"></a>
-## Support For additional assistance using this library, contact the developer experience (DX) team via [email](mailto:[email protected]) or on [slack](https://bit.ly/34Vkzcg).
+## Contribution guidelines
 
-You can also follow us [@FlutterwaveEng](https://twitter.com/FlutterwaveEng) and let us know what you think 😊
+Read more about our community contribution guidelines [here](/CONTRIBUTING).
 
-## Contribution guidelines
-Read more about our community contribution guidelines [here](https://www.notion.so/flutterwavego/Community-contribution-guide-ca1d8a876ba04d45ab4b663c758ae42a).
 
 ## License
-By contributing to the Flutter library, you agree that your contributions will be licensed under its [MIT license](https://opensource.org/licenses/MIT).
+
+By contributing to the Flutter library, you agree that your contributions will be licensed under its [MIT license](/LICENSE).
+
+Copyright (c) Flutterwave Inc.
+
 
 ## Built Using
+
 - [flutter](https://flutter.dev/)
 - [http](https://pub.dev/packages/http)
 - [flutter_inappwebview](https://pub.dev/packages/flutter_inappwebview)
 - [fluttertoast](https://pub.dev/packages/fluttertoast)
-
-<a id="references"></a>
-## Flutterwave API  References
-
-- [Flutterwave API Doc](https://developer.flutterwave.com/docs)
-- [Flutterwave Inline Payment Doc](https://developer.flutterwave.com/docs/flutterwave-inline)
-- [Flutterwave Dashboard](https://dashboard.flutterwave.com/login)

lib/core/flutterwave.dart

@@ -43,7 +43,7 @@ class Flutterwave {
 
 
   /// Starts Standard Transaction
-  Future<ChargeResponse> charge() async {
+  Future<ChargeResponse?> charge() async {
     final request = StandardRequest(
         txRef: txRef,
         amount: amount,