cashfree_pg 0.0.3+3

A Flutter plugin for Cashfree PG integration. It opens the payment page in a flutter_webview.

Cashfree PG Flutter SDK

Integration Steps

Step 1: Add Dependency

Open the pubspec.yaml file located inside the app folder, and add cashfree_pg: under dependencies.

 cashfree_pg: 0.0.3+3

Step 2: Add permissions (Android)

The Cashfree PG SDK requires that you add the INTERNET permission in your Android Manifest file.

<manifest ...>
 <uses-permission android:name="android.permission.INTERNET" />
<application ...>

Step 3: Generate Token (From Backend)

You will need to generate a token from your backend and pass it to app while initiating payments. For generating token you need to use our token generation API. Please take care that this API is called only from your as it uses secretKey. Thus this API should never be called from App.

Request Description

You need to send orderId, orderCurrency and orderAmount as a JSON object to the API endpoint and in response a token will received. Please see the description of request below.

curl -XPOST -H 'Content-Type: application/json'
-H 'x-client-id: <YOUR_APP_ID>'
-H 'x-client-secret: <YOUR_SECRET_KEY>'
-d '{
 "orderId": "<ORDER_ID>",
 "orderAmount":<ORDER_AMOUNT>,
 "orderCurrency": "INR"
}' 'https://test.cashfree.com/api/v2/cftoken/order'

Request Example

Replace YOUR_APP_ID and YOUR_SECRET_KEY with actual values.

curl -XPOST -H 'Content-Type: application/json' -H 'x-client-id: YOUR_APP_ID' -H 'x-client-secret: YOUR_SECRET_KEY' -d '{
 "orderId": "Order0001",
 "orderAmount":1,
 "orderCurrency":"INR"
}' 'https://test.cashfree.com/api/v2/cftoken/order'

Response Example

{
"status": "OK",
"message": "Token generated",
"cftoken": "v79JCN4MzUIJiOicGbhJCLiQ1VKJiOiAXe0Jye.s79BTM0AjNwUDN1EjOiAHelJCLiIlTJJiOik3YuVmcyV3QyVGZy9mIsEjOiQnb19WbBJXZkJ3biwiIxADMwIXZkJ3TiojIklkclRmcvJye.K3NKICVS5DcEzXm2VQUO_ZagtWMIKKXzYOqPZ4x0r2P_N3-PRu2mowm-8UXoyqAgsG"
}

The "cftoken" is the token that is used authenticate your payment request that will be covered in the next step.

Step 4: Initiate Payment

• App passes the order info and the token to the SDK
• Customer is shown the payment screen where he completes the payment
• Once the payment is complete SDK verifies the payment
• App receives the response from SDK and handles it appropriately

NOTE

• The order details passed during the token generation and the payment initiation should match. Otherwise you'll get a"invalid order details" error.
• Wrong appId and token will result in "Unable to authenticate merchant" error. The token generated for payment is valid for 5 mins within which the payment has to be initiated. Otherwise you'll get a "Invalid token" error.

Payment modes

Web Checkout Integration

How to integrate

For both the modes (normal and seamless) you need to invoke the doPayment() method. However, there are a few extra parameters you need to pass incase of seamless mode.

doPayment

Future<dynamic> doPayment(Map<String, dynamic> inputs)

Initiates the payment in a webview. The customer will be taken to the payment page on cashfree server where they will have the option of paying through any payment option that is activated on their account. Once the payment is done the webview will close and the response will be delivered in the callback.

Parameters:

• context BuildContext object of the widget.

• params A map of all the relevant parameters described in the Request Params section below.

• token The token generated from Step 4.

• stage Value should be either "TEST" or "PROD" for testing server or production server respectively.

Sample Code

CashfreePGSDK.doPayment(inputParams)
        .then((value) => value?.forEach((key, value) {
              print("$key : $value");
              //Do something with the result
            }));

Request Parameters

Parameter	Required	Description
stage	Yes	Environment - TEST or PROD
appId	Yes	Your app id
orderId	Yes	Order/Invoice Id
orderAmount	Yes	Bill amount of the order
orderNote	No	A help text to make customers know more about the order
orderCurrency	Yes	Currency code of the order. Default is INR.
customerName	No	Name of the customer
customerPhone	Yes	Phone number of customer
customerEmail	Yes	Email id of the customer
tokenData	Yes	Token generated from step 4
notifyUrl	No	Notification URL for server-server communication. Useful when user’s connection drops after completing payment.
paymentModes	No	Allowed payment modes for this order. Available values: cc, dc, nb, paypal, upi, wallet. Leave it blank if you want to display all modes

Response parameters

These parameters are sent as extras to the onActivityResult(). They contain the details of the transaction.

Parameter	Description
orderId	Order id for which transaction has been processed. Ex: GZ-212
orderAmount	Amount of the order. Ex: 256.00
paymentMode	Payment mode of the transaction.
referenceId	Cashfree generated unique transaction Id. Ex: 140388038803
txStatus	Payment status for that order. Values can be : SUCCESS, FLAGGED, PENDING, FAILED, CANCELLED.
paymentMode	Payment mode used by customer to make the payment. Ex: DEBIT_CARD, MobiKwik, etc
txMsg	Message related to the transaction. Will have the reason, if payment failed
txTime	Time of the transaction
type	Fixed value : CashFreeResponse. To identify the response is from cashfree SDK.
signature	Response signature, more here.

NOTE

• There can be scenarios where the SDK is not able to verify the payment within a short period of time. The status of such orders will be PENDING.
• If the WebView is closing as soon as it opens then most probably something is wrong with the input passed to the SDK. Please check your inputs and if you still need further help reach out to us at [e-mail].