Sergei / Add redirect_from query param (#7456)

* feat: add redirect_from query param

* chore: empty

* feat: add util function to add query param

themes/gatsby-theme-deriv/src/common/utility.ts

@@ -395,8 +395,9 @@ export const useCallbackRef = (callback: () => void) => {
 
 const getSubdomain = () => isBrowser() && window.location.hostname.split('.')[0]
 
-export const isEuDomain = () => !!eu_domains.some((eu_sub_domain) => eu_sub_domain.test(getSubdomain()))
-
+export const isEuDomain = () =>
+    !!eu_domains.some((eu_sub_domain) => eu_sub_domain.test(getSubdomain()))
+
 export const isLocalhost = () => !!(isBrowser() && process.env.NODE_ENV === 'development')
 
 export const isTestlink = () =>
@@ -455,3 +456,9 @@ export const getP2PCookie = () => {
     const p2p_validity = Cookies.get('is_p2p_disabled')
     return p2p_validity
 }
+
+export const addQueryParam = (link: string, param: string, value: string) => {
+    const url = new URL(link)
+    url.searchParams.set(param, value)
+    return url.toString()
+}

themes/gatsby-theme-deriv/src/components/custom/utils.tsx

@@ -1,5 +1,10 @@
 import { deriv_app_url } from 'common/constants'
-import { getDerivAppLocalizedURL, getLanguage, redirectToTradingPlatform } from 'common/utility'
+import {
+    addQueryParam,
+    getDerivAppLocalizedURL,
+    getLanguage,
+    redirectToTradingPlatform,
+} from 'common/utility'
 
 export const handleGetTrading = () => {
     const sub_url = redirectToTradingPlatform()
@@ -15,5 +20,6 @@ export const handleRedirectToTradersHub = () => {
         `${deriv_app_url}/appstore/traders-hub`,
         getLanguage(),
     )
-    window.location.href = trading_hub_url_localized
+    const redirect_link = addQueryParam(trading_hub_url_localized, 'redirect_from', 'deriv_com')
+    window.location.href = redirect_link
 }