Display welcome notification when user connects external wallet

Author: emerick

app/brave_generated_resources.grd

@@ -645,6 +645,12 @@ Or change later at <ph name="SETTINGS_EXTENIONS_LINK">$2<ex>brave://settings/ext
       <message name="IDS_BRAVE_ADS_NOTIFICATION_AD_ACCESSIBLE_NAME" desc="Text to be spoken when a notification ad is shown">
         Brave Notification Ad
       </message>
+      <message name="IDS_BRAVE_ADS_NOTIFICATION_EXTERNAL_WALLET_CONNECTED_TITLE" desc="The notification title to show when an external wallet is connected">
+        &#x1F389; You're now earning for Brave Ads!
+      </message>
+      <message name="IDS_BRAVE_ADS_NOTIFICATION_EXTERNAL_WALLET_CONNECTED_BODY" desc="The notification body to show when an external wallet is connected">
+        For example, you earn whenever a notification like this appears on your screen. You don't need to click to earn.
+      </message>
 
       <!-- Brave Search -->
       <message name="IDS_SETTINGS_WEB_DISCOVERY_LABEL" desc="Description that shows settings for toggle Web Discovery">

components/brave_ads/browser/ads_service_impl.cc

@@ -60,6 +60,7 @@
 #include "brave/components/brave_rewards/common/pref_names.h"
 #include "brave/components/brave_rewards/common/rewards_flags.h"
 #include "brave/components/l10n/common/locale_util.h"
+#include "brave/components/l10n/common/localization_util.h"
 #include "brave/grit/brave_generated_resources.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
@@ -2101,6 +2102,22 @@ void AdsServiceImpl::OnRewardsWalletUpdated() {
 
 void AdsServiceImpl::OnExternalWalletConnected() {
   SetBooleanPref(prefs::kShouldMigrateVerifiedRewardsUser, true);
+
+#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
+  if (!IsEnabled() || !CheckIfCanShowNotificationAds()) {
+    return;
+  }
+
+  base::Value::Dict dict;
+  dict.Set("title",
+           brave_l10n::GetLocalizedResourceUTF16String(
+               IDS_BRAVE_ADS_NOTIFICATION_EXTERNAL_WALLET_CONNECTED_TITLE));
+  dict.Set("body",
+           brave_l10n::GetLocalizedResourceUTF16String(
+               IDS_BRAVE_ADS_NOTIFICATION_EXTERNAL_WALLET_CONNECTED_BODY));
+  dict.Set("uuid", base::GUID::GenerateRandomV4().AsLowercaseString());
+  ShowNotificationAd(std::move(dict));
+#endif
 }
 
 void AdsServiceImpl::OnCompleteReset(const bool success) {