Add PreCheckoutQueryEvent handling

src/TgBotLib/Classes/Utilities.php

@@ -101,6 +101,11 @@
                 return UpdateEventType::PAID_MEDIA_PURCHASED;
             }
 
+            if($update->getPreCheckoutQuery() !== null)
+            {
+                return UpdateEventType::PRE_CHECKOUT_QUERY;
+            }
+
             return UpdateEventType::UPDATE_EVENT;
         }
     }

src/TgBotLib/Enums/UpdateEventType.php

@@ -10,6 +10,7 @@
     use TgBotLib\Events\PollAnswerEvent;
     use TgBotLib\Events\PollEvent;
     use TgBotLib\Events\PaidMediaPurchasedEvent;
+    use TgBotLib\Events\PreCheckoutQueryEvent;
     use TgBotLib\Events\RemovedChatBoostEvent;
 
     enum UpdateEventType : string
@@ -23,4 +24,5 @@
         case POLL_ANSWER = PollAnswerEvent::class;
         case POLL = PollEvent::class;
         case PAID_MEDIA_PURCHASED = PaidMediaPurchasedEvent::class;
+        case PRE_CHECKOUT_QUERY = PreCheckoutQueryEvent::class;
     }

src/TgBotLib/Events/PreCheckoutQueryEvent.php

@@ -0,0 +1,29 @@
+<?php
+
+    namespace TgBotLib\Events;
+
+    use TgBotLib\Abstracts\UpdateEvent;
+    use TgBotLib\Bot;
+    use TgBotLib\Enums\UpdateEventType;
+    use TgBotLib\Objects\Payments\PreCheckoutQuery;
+
+    abstract class PreCheckoutQueryEvent extends UpdateEvent
+    {
+        /**
+         * @inheritDoc
+         */
+        public static function getEventType(): UpdateEventType
+        {
+            return UpdateEventType::PRE_CHECKOUT_QUERY;
+        }
+
+        /**
+         * New incoming pre-checkout query. Contains full information about checkout
+         *
+         * @return PreCheckoutQuery
+         */
+        protected function getPreCheckoutQuery(): PreCheckoutQuery
+        {
+            return $this->update->getPreCheckoutQuery();
+        }
+    }