Payments

Server Integration

Go

Integration Steps

Integration Steps

Integrate your Go-based website with our SDK to start accepting payments using the Curlec Payment Gateway.

Start accepting domestic payments from customers on your website using the Curlec Payment Gateway. Curlec has developed the Standard Checkout method and manages it. You can configure payment methods, orders, company logo and also select custom colour based on your convenience. Curlec supports these

payment methods

.

Checkout screen as configured using Curlec for accepting payments

GitHub Repository

Download the latest

razorpay-go.zip

file from GitHub. It is pre-compiled to include all dependencies.

Project Structure

Before you begin, we recommend you check that your project contains the following files:

Before you proceed:

1. Build Integration

Integrate with your Go-based website.

2. Test Integration

Test the integration by making a test payment.

3. Go-live Checklist

Check the go-live checklist.

1. Build Integration

1.1 Create an Order in Server

Order is an important step in the payment process.

  • An order should be created for every payment.
  • You can create an order using the

    Orders API

    in the app.js file. It is a server-side API call. Know how to

    authenticate

    Orders API.
  • The order_id received in the response should be passed to checkout in the index.html file. This ties the Order with the payment and secures the request from being tampered.

1.1.1 Sample Code

Create a file, for example, main.go and add the API code given below:

client := razorpay.NewClient("YOUR_KEY_ID", "YOUR_SECRET")


data := map[string]interface{}{
"amount": 50000, // Amount is in sen. Default currency is MYR. Hence, 50000 refers to 50000 sen.
"currency": "MYR",
"receipt": "some_receipt_id", 
}
body, err := client.Order.Create(data, nil)

1.1.2 Request Parameters

Here is the list of parameters for creating an order:

amount

mandatory

integer The amount to be paid by the customer in sen. For example, if the amount is RM 500.00, enter 50000.

currency

mandatory

string The currency in which the payment should be made by the customer. Length must be of 3 characters.

receipt

optional

string Your receipt id for this order should be passed here. Maximum length is 40 characters.

notes

optional

json object Key-value pair that can be used to store additional information about the entity. Maximum 15 key-value pairs, 256 characters (maximum) each. For example, "note_key": "Beam me up Scotty”.

partial_payment

optional

boolean Indicates whether the customer can make a partial payment. Possible values:

  • true: The customer can make partial payments.
  • false (default): The customer cannot make partial payments.

first_payment_min_amount

optional

integer Minimum amount that must be paid by the customer as the first partial payment. For example, if an amount of RM 7,000.00 is to be received from the customer in two installments of #1 - RM 5,000.00, #2 - RM 2,000.00 then you can set this value as 500000. This parameter should be passed only if partial_payment is true.

Know more about

Orders API

.

1.1.3 Response Parameters

Descriptions for the response parameters are present in the

Orders Entity

table.

1.1.4 Error Response Parameters

The error response parameters are available in the

API Reference Guide

.

1.2 Add Checkout Options

Add the Curlec Checkout options in your project. For example, if you are using HTML for your frontend, create a page called app.html and add the Pay button on your web page using the checkout code and either the callback URL or handler function.

1.2.1 Callback URL or Handler Function

Handy Tips

For FPX payments, you must use the Callback URL sample code for checkout. You should send the following parameters along with the other checkout parameters:

  • callback_url with the URL to which customers should be redirected after payment completion.
  • redirect with the value as true.

1.2.2 Code to Add Pay Button

Copy-paste the parameters as options in your code:

<button id="rzp-button1">Pay with Curlec</button>
<script src="https://checkout.razorpay.com/v1/checkout.js"></script>
<script>
var options = {
    "key": "YOUR_KEY_ID", // Enter the Key ID generated from the Dashboard
    "amount": "50000", // Amount is in sen. Default currency is MYR. Hence, 50000 refers to 50000 sen.
    "currency": "MYR",
    "name": "Acme Corp",
    "description": "Test Transaction",
    "image": "https://example.com/your_logo",
    "order_id": "order_IluGWxBm9U8zJ8", //This is a sample Order ID. Pass the `id` obtained in the response of Step 1
    "callback_url": "https://eneqd3r9zrjok.x.pipedream.net/",
    "redirect": true,
    "prefill": {
        "name": "Siti Aisyah",
        "email": "siti.aisyah@example.com",
        "contact": "+601113455567"
    },
    "notes": {
        "address": "Curlec Corporate Office"
    },
    "theme": {
        "color": "#3399cc"
    }
};
var rzp1 = new Razorpay(options);
document.getElementById('rzp-button1').onclick = function(e){
    rzp1.open();
    e.preventDefault();
}
</script>

Handy Tips

Test your integration using these

test cards

.

1.2.3 Checkout Options

key

mandatory

string API Key ID generated from the Curlec Dashboard.

amount

mandatory

integer The amount to be paid by the customer in sen. For example, if the amount is RM 500.00, enter 50000.

currency

mandatory

string The currency in which the payment should be made by the customer. Length must be of 3 characters.

name

mandatory

string Your Business/Enterprise name shown on the Checkout form. For example, Acme Corp.

description

optional

string Description of the purchase item shown on the Checkout form. It should start with an alphanumeric character.

image

optional

string Link to an image (usually your business logo) shown on the Checkout form. Can also be a base64 string if you are not loading the image from a network.

order_id

mandatory

string Order ID generated via

Orders API

.

prefill

object You can prefill the following details at Checkout.

Boost Conversions and Minimise Drop-offs

  • Autofill customer contact details, especially phone number to ease form completion. Include customer’s phone number in the contact parameter of the JSON request's prefill object. Format: +(country code)(phone number). Example: “contact": "+601113455567").
  • This is not applicable if you do not collect customer contact details on your website before checkout, have Shopify stores or use any of the no-code apps.

name

optional

string Cardholder's name to be pre-filled if customer is to make card payments on Checkout. For example, Siti Aisyah.

email

optional

string Email address of the customer.

contact

optional

string Phone number of the customer. The expected format of the phone number is + {country code}{phone number}. If the country code is not specified, 60 will be used as the default value. This is particularly important while prefilling contact of customers with phone numbers issued outside Malaysia. Examples:

  • +14155552671 (a valid non-Malaysian number)
  • +601113455567 (a valid Malaysian number).
    If 1113455567 is entered without the country code, +60 is added to it as +601113455567.

method

optional

string Pre-selection of the payment method for the customer. Will only work if contact and email are also pre-filled.
Possible value is card.

notes

optional

object Set of key-value pairs that can be used to store additional information about the payment. It can hold a maximum of 15 key-value pairs, each 256 characters long (maximum).

theme

object Thematic options to modify the appearance of Checkout.

hide_topbar

optional

boolean Used to display or hide the top bar on the Checkout form. This bar shows the selected payment method, phone number and gives the customer the option to navigate back to the start of the Checkout form. Possible values:

  • true: Hides the top bar
  • false (default): Displays the top bar.

color

optional

string Enter your brand colour's HEX code to alter the text, payment method icons and CTA (call-to-action) button colour of the Checkout form.

backdrop_color

optional

string Enter a HEX code to change the Checkout's backdrop colour.

modal

object Options to handle the Checkout modal.

backdropclose

optional

boolean Indicates whether clicking the translucent blank space outside the Checkout form should close the form. Possible values:

  • true: Closes the form when your customer clicks outside the checkout form.
  • false (default): Does not close the form when customer clicks outside the checkout form.

escape

optional

boolean Indicates whether pressing the escape key should close the Checkout form. Possible values:

  • true (default): Closes the form when the customer presses the escape key.
  • false: Does not close the form when the customer presses the escape key.

handleback

optional

boolean Determines whether Checkout must behave similar to the browser when back button is pressed. Possible values:

  • true (default): Checkout behaves similarly to the browser. That is, when the browser's back button is pressed, the Checkout also simulates a back press. This happens as long as the Checkout modal is open.
  • false: Checkout does not simulate a back press when browser's back button is pressed.

confirm_close

optional

boolean Determines whether a confirmation dialog box should be shown if customers attempts to close Checkout. Possible values:

  • true: Confirmation dialog box is shown.
  • false (default): Confirmation dialog box is not shown.

ondismiss

optional

function Used to track the status of Checkout. You can pass a modal object with ondismiss: function()\{\} as options. This function is called when the modal is closed by the user.

animation

optional

boolean Shows an animation before loading of Checkout. Possible values:

  • true(default): Animation appears.
  • false: Animation does not appear.

subscription_id

optional

string If you are accepting recurring payments using Curlec Checkout, you should pass the relevant subscription_id to the Checkout. Know more about

Subscriptions on Checkout

.

subscription_card_change

optional

boolean Permit or restrict customer from changing the card linked to the subscription. You can also do this from the

hosted page

. Possible values:
  • true: Allow the customer to change the card from Checkout.
  • false (default): Do not allow the customer to change the card from Checkout.

callback_url

optional

string Customers will be redirected to this URL on successful payment. Ensure that the domain of the Callback URL is allowlisted. This parameter is mandatory for FPX payments.

redirect

optional

boolean Determines whether to post a response to the event handler post payment completion or redirect to Callback URL. callback_url and redirect parameters are mandatory for FPX payments. Possible values:

  • true: Customer is redirected to the specified callback URL in case of payment failure. For FPX payments, the redirect parameter should always be sent as true.
  • false (default): Customer is shown the Checkout popup to retry the payment.

customer_id

optional

string Unique identifier of customer.

remember_customer

optional

boolean Determines whether to allow saving of cards. Can also be configured via the

Dashboard

. Possible values:
  • true: Enables card saving feature.
  • false (default): Disables card saving feature.

timeout

optional

integer Sets a timeout on Checkout, in seconds. After the specified time limit, the customer will not be able to use Checkout.

readonly

object Marks fields as read-only.

contact

optional

boolean Used to set the contact field as readonly. Possible values:

  • true: Customer will not be able to edit this field.
  • false (default): Customer will be able to edit this field.

email

optional

boolean Used to set the email field as readonly. Possible values:

  • true: Customer will not be able to edit this field.
  • false (default): Customer will be able to edit this field.

name

optional

boolean Used to set the name field as readonly. Possible values:

  • true: Customer will not be able to edit this field.
  • false (default): Customer will be able to edit this field.

hidden

object Hides the contact details.

contact

optional

boolean Used to set the contact field as optional. Possible values:

  • true: Customer will not be able to view this field.
  • false (default): Customer will be able to view this field.

email

optional

boolean Used to set the email field as optional. Possible values:

  • true: Customer will not be able to view this field.
  • false (default): Customer will be able to view this field.

allow_rotation

optional

boolean Used to rotate payment page as per screen orientation. Applicable from Android SDK version 1.6.4 and above. Possible values:

  • true: Payment page can be rotated.
  • false (default): Payment page cannot be rotated.

config

optional

object Parameters that enable configuration of checkout display language.

display

object Child parameter that enables configuration of checkout display language.

language

string The language in which checkout should be displayed. Possible value is en: English.

Handy Tips

The open method of the Razorpay object (rzp1.open()) must be invoked by your site's JavaScript, which may or may not be a user-driven action such as a click.

1.2.4 Handle Payment Success and Failure

The way the Payment Success and Failure scenarios are handled depends on the

Checkout Sample Code

you used in the last step.

Checkout with Callback URL

If you used the sample code with the callback URL:

Razorpay makes a POST call to the callback URL with the razorpay_payment_id, razorpay_order_id and razorpay_signature in the response object of the successful payment. Only successful authorisations are auto-submitted.

Checkout with Handler Function

If you used the sample code with the handler function:

The customer sees your website page. The checkout returns the response object of the successful payment (razorpay_payment_id, razorpay_order_id and razorpay_signature). Collect these and send them to your server.

Use the Success/Failure Handling code given below:

"handler": function (response){
    alert(response.razorpay_payment_id);
    alert(response.razorpay_order_id);
    alert(response.razorpay_signature)}

1.2.5 Configure Payment Methods (Optional)

Multiple payment methods are available on Curlec Standard Checkout.

  • The payment methods are fixed and cannot be changed.
  • You can configure the order or make certain payment methods prominent. Know more about configuring payment methods. Know more about

    configuring payment methods

    .

1.3 Store Fields in Server

A successful payment returns the following fields to the Checkout form.

  • You need to store these fields in your server.
  • You can confirm the authenticity of these details by verifying the signature in the next step.

razorpay_payment_id

string Unique identifier for the payment returned by Checkout only for successful payments.

razorpay_order_id

string Unique identifier for the order returned by Checkout.

razorpay_signature

string Signature returned by the Checkout. This is used to verify the payment.

1.4 Verify Payment Signature

This is a mandatory step to confirm the authenticity of the details returned to the Checkout form for successful payments.

To verify the razorpay_signature returned to you by the Checkout form:

  1. Create a signature in your server using the following attributes:

  2. Use the SHA256 algorithm, the razorpay_payment_id and the order_id to construct an HMAC hex digest as shown below:

    generated_signature = hmac_sha256(order_id + "|" + razorpay_payment_id, secret);
    

        if (generated_signature == razorpay_signature) {
        payment is successful
        }

  3. If the signature you generate on your server matches the razorpay_signature returned to you by the Checkout form, the payment received is from an authentic source.

Generate Signature on Your Server

Use the code given below to generate signature on your server:

import ( razorpay "github.com/razorpay/razorpay-go" )
client := razorpay.NewClient("YOUR_KEY_ID", "YOUR_SECRET")




params := map[string]interface{}{
"razorpay_order_id": "order_IEIaMR65cu6nz3",
"razorpay_payment_id": "pay_IH4NVgf4Dreq1l",
}




signature := "0d4e745a1838664ad6c9c9902212a32d627d68e917290b0ad5f08ff4561bc50f";
secret := "EnLs21M47BllR3X8PSFtjtbd";
utils.VerifyPaymentSignature(params, signature, secret)

1.5 Verify Payment Status

Handy Tips

On the Dashboard, ensure that the payment status is captured. Refer to the payment capture settings page to know how to

capture payments automatically

.

You can track the payment status in three ways:

To verify the payment status from the Dashboard:

  1. Log in to the

    Dashboard

    and navigate to Transactions → Payments.
  2. Check if a Payment Id has been generated and note the status. In case of a successful payment, the status is marked as Captured.
Check if the payment id is generated and the status is captured

2. Test Integration

After the integration is complete, a Pay button appears on your webpage/app.

Click the button and make a test transaction to ensure the integration is working as expected. You can start accepting actual payments from your customers once the test transaction is successful.

You can make test payments using one of the payment methods configured at the Checkout.

Watch Out!

This is a mock payment page that uses your test API keys, test card and payment details.

  • Ensure you have entered only your

    Test Mode API keys

    in the Checkout code.
  • No real money is deducted due to the usage of test API keys. This is a simulated transaction.

Supported Payment Methods

Following are all the payment modes that the customer can use to complete the payment on the Checkout.

Following are the payment methods supported as configured at Curlec Checkout.

FPX

You can select any of the listed banks. After choosing a bank, Curlec will redirect to a mock page where you can make the payment a success or a failure. Since this is Test Mode, we will not redirect you to the bank login portals.

Wallet

You can select any of the listed wallets. After choosing a wallet, you will be redirected to a mock page where you can make the payment success or a failure. Since this is Test Mode, we will not redirect you to the wallet login portals.

We support

GrabPay

wallet.

Watch Out!

iOS integration for Touch'n Go wallet is currently unavailable. We will be adding support for it soon.

Cards

You can use one of the following test cards to test transactions for your integration in Test Mode.

  • Use any valid expiration date in the future in the MM/YY format.
  • Use any random CVV to create a successful payment.

Check the list of

supported card networks

.

3. Go-live Checklist

Check the go-live checklist for Curlec Web Standard Checkout integration. Consider these steps before taking the integration live.

3.1 Accept Live Payments

You can perform an end-to-end simulation of funds flow in the Test Mode. Once confident that the integration is working as expected, switch to the Live Mode and start accepting payments from customers.

Watch Out!

Ensure you are switching your test API keys with API keys generated in Live Mode.

To generate API Keys in Live Mode on your Curlec Dashboard:

  1. Log in to the

    Curlec Dashboard

    and switch to Live Mode on the menu.
  2. Navigate to Account & Settings → API Keys → Generate Key to generate the API Key for Live Mode.
  3. Download the keys and save them securely.
  4. Replace the Test API Key with the Live Key in the Checkout code and start accepting actual payments.

3.2 Payment Capture

After payment is authorized, you need to capture it to settle the amount to your bank account as per the settlement schedule. Payments that are not captured are auto-refunded after a fixed time.

Watch Out

  • You should deliver the products or services to your customers only after the payment is captured. Curlec automatically refunds all the uncaptured payments.
  • You can track the payment status using our

    Fetch a Payment API

    or webhooks.

How to Capture Payments

  • Auto-capture payments (recommended)
    Authorized payments can be automatically captured. You can auto-capture all payments

    using global settings

    on the Curlec Dashboard.

Watch Out!

Payment capture settings work only if you have integrated with Orders API on your server side. Know more about the

Orders API

.

  • Manually capture payments
    Each authorized payment can also be captured individually. You can manually capture payments using:

Know more about

Capture Settings for payments

.

3.3 Set Up Webhooks

Ensure you have

set up webhooks

in the live mode and configured the events for which you want to receive notifications.

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