feat(checkout): send referrer domain to create the widget URL (#2740)

Author: jeetparikh

packages/checkout/sdk/src/fiatRamp/fiatRamp.ts

@@ -50,6 +50,7 @@ export class FiatRampService {
     )) as OnRampConfig;
 
     const createWidgetUrl = `${IMMUTABLE_API_BASE_URL[this.config.environment]}/checkout/v1/widget-url`;
+
     let widgetParams: Record<string, any> = {
       api_key: onRampConfig[OnRampProvider.TRANSAK].publishableApiKey,
       network: 'immutablezkevm',
@@ -60,6 +61,7 @@ export class FiatRampService {
       theme_color: 'FFFFFF', // this only controls the background colour of the Buy button
       default_crypto_currency: params.tokenSymbol || 'IMX',
       hide_menu: !(params.showMenu ?? true),
+      referrer_domain: window.location.origin,
     };
 
     if (params.isPassport && params.email) {

packages/checkout/widgets-lib/src/components/Transak/useTransakIframe.ts

@@ -109,6 +109,7 @@ export const useTransakIframe = (props: UseTransakIframeProps) => {
         exchange_screen_title: exchangeScreenTitle,
         wallet_address: walletAddress,
         partner_order_id: partnerOrderId,
+        referrer_domain: window.location.origin,
       };
 
       if (email) {