fix

app/Repositories/MetaRepository.php

@@ -8,6 +8,7 @@
 namespace App\Repositories;
 
 use App\Models\Meta;
+use BaconQrCode\Encoder\QrCode;
 use Dingo\Api\Http\Response;
 use Illuminate\Support\Carbon;
 use Illuminate\Support\Facades\DB;
@@ -66,6 +67,7 @@ class MetaRepository {
             $meta = $this->meta->create($data);
 
             DB::commit();
+            QrCode::size(200)->generate("http://trace.uptoyo.com/".$meta['patch_num'],public_path().'/qrcodes/'.$meta['patch_num'].'.png');
             return Response::create();
         }catch (QueryException $exception){
             DB::rollBack();

app/Transformers/MetaTransformer.php

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