fix: include paintKit in gen code for sticker slab keychains

Author: vlydev

src/GenCode.php

@@ -59,6 +59,9 @@ private static function serializeStickerPairs(array $stickers, ?int $padTo): arr
             foreach ($filtered as $s) {
                 $result[] = (string) $s->stickerId;
                 $result[] = self::formatFloat($s->wear ?? 0.0);
+                if ($s->paintKit !== null) {
+                    $result[] = (string) $s->paintKit;
+                }
             }
         }
 

tests/GenCodeTest.php

@@ -309,6 +309,57 @@ public function testRoundtripWithKeychain(): void
         $this->assertSame(36, $parsed->keychains[0]->stickerId);
     }
 
+    // -----------------------------------------------------------------------
+    // toGenCode — keychain paintKit
+    // -----------------------------------------------------------------------
+
+    public function testToGenCodeKeychainWithPaintKitAppendsPaintKit(): void
+    {
+        $item = new ItemPreviewData(
+            defindex: 1355,
+            paintindex: 0,
+            paintseed: 0,
+            paintwear: 0.0,
+            keychains: [new Sticker(slot: 0, stickerId: 37, wear: 0.0, paintKit: 929)],
+        );
+        $code = GenCode::toGenCode($item, '');
+        $tokens = explode(' ', $code);
+        // last three tokens should be: 37 0 929
+        $this->assertSame('37', $tokens[count($tokens) - 3]);
+        $this->assertSame('0', $tokens[count($tokens) - 2]);
+        $this->assertSame('929', $tokens[count($tokens) - 1]);
+    }
+
+    public function testToGenCodeKeychainWithoutPaintKitNoExtraToken(): void
+    {
+        $item = new ItemPreviewData(
+            defindex: 7,
+            paintindex: 0,
+            paintseed: 0,
+            paintwear: 0.0,
+            keychains: [new Sticker(slot: 0, stickerId: 36, wear: 0.0)],
+        );
+        $code = GenCode::toGenCode($item, '');
+        $tokens = explode(' ', $code);
+        // last two tokens should be: 36 0
+        $this->assertSame('36', $tokens[count($tokens) - 2]);
+        $this->assertSame('0', $tokens[count($tokens) - 1]);
+    }
+
+    // -----------------------------------------------------------------------
+    // genCodeFromLink — sticker slab
+    // -----------------------------------------------------------------------
+
+    public function testGenCodeFromLinkSlabUrlEndsWithPaintKit(): void
+    {
+        $slabUrl = 'steam://run/730//+csgo_econ_action_preview%20819181994A8BA181A982B189E981F181238086898191A4E1208698F309C9';
+        $code = GenCode::genCodeFromLink($slabUrl, '');
+        $tokens = explode(' ', $code);
+        $this->assertSame('37', $tokens[count($tokens) - 3]);
+        $this->assertSame('0', $tokens[count($tokens) - 2]);
+        $this->assertSame('929', $tokens[count($tokens) - 1]);
+    }
+
     // -----------------------------------------------------------------------
     // genCodeFromLink
     // -----------------------------------------------------------------------