first commit

core/apps/shared/utils/settings.py

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+from core.apps.shared.models import OptionsModel
+from typing import Optional
+from django.utils.translation import gettext_lazy as _
+
+
+def get_config(settings: str, key: str, default=None) -> Optional[str]:
+    config = OptionsModel.objects.filter(settings__key=settings, key=key)
+    if not config.exists():
+        return default
+    return config.first().value
+
+
+def get_exchange_rate():
+    exchange_rate = get_config("currency", "exchange_rate")
+    if exchange_rate is None:
+        raise Exception(_("USD kursi kiritilmagan iltimos adminga murojat qiling"))
+    return float(exchange_rate[0])