fix: add necessary supporting code for funding update

src/backend/src/services/GetUserService.js

@@ -17,6 +17,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
+const { Actor } = require("./auth/Actor");
 const BaseService = require("./BaseService");
 const { DB_READ } = require("./database/consts");
 
@@ -78,6 +79,13 @@ class GetUserService extends BaseService {
         await svc_whoami.get_details({ user }, user);
         return user;
     }
+    
+    async refresh_actor (actor) {
+        if ( actor.type.user ) {
+            actor.type.user = await this.get_user({ username: actor.type.user.username });
+        }
+        return actor;
+    }
 
     async get_user_ (options) {
         const services = this.services;

src/backend/src/services/drivers/CostService.js

@@ -55,6 +55,15 @@ class CostService extends BaseService {
         });
         await svc_event.emit('credit.record-cost', event);
     }
+    async record_funding_update ({ old_amount, new_amount }) {
+        const svc_event = this.services.get('event');
+        const event = {
+            actor: Context.get('actor'),
+            old_amount,
+            new_amount,
+        };
+        await svc_event.emit('credit.funding-update', event);
+    }
 }
 
 module.exports = {