fix

app/Transformers/MetaTransformer.php

@@ -39,7 +39,7 @@ class MetaTransformer extends TransformerAbstract
             "trans_id" => $meta['trans_id'],
             "block_height" => $meta['block_height'],
             "block_time" => $meta['block_time'],
-            "qrcode" => QrCode::size(200)->generate("http://trace.uptoyo.com/".$meta['patch_num']),
+            "qrcode" => QrCode::format('png')->size(200)->generate("http://trace.uptoyo.com/".$meta['patch_num']),
             "created_at" => Carbon::parse($meta['created_at'])->toDateTimeString(),
             "updated_at" => Carbon::parse($meta['updated_at'])->toDateTimeString(),
         ];