Check client's IP in payeer's handler

app/Http/Controllers/BillingController.php

@@ -155,6 +155,13 @@ class BillingController extends Controller
 
 	//This needs to check the ip of the sender
 	public function processPayeer(Request $request) {
+		$allowed = ['185.71.65.92', '185.71.65.189', '149.202.17.210'];
+		$ipAddress = $request->ip();
+
+		if ($ipAddress !in_array($allowed)){
+			abort(401);
+		}
+
 		$secret = config('services.payeer.secret');
 		$arHash = [$request->m_operation_id,
 			$request->m_operation_ps,
@@ -167,6 +174,7 @@ class BillingController extends Controller
 			$request->m_desc,
 			$request->m_status
 		];
+
 		if (isset($request->m_params)) {
 			$arHash[] = $request->m_params;
 		}