feat: updates

app/Models/Sale.php

@@ -4,8 +4,14 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\MorphToMany;
 
 class Sale extends Model
 {
     use HasFactory;
+
+    public function transactions(): MorphToMany
+    {
+        return $this->morphToMany(Transaction::class, 'transactionable');
+    }
 }