feat: drive visible payment methods from enabled providers

backend/internal/service/payment_config_limits.go

@@ -20,18 +20,7 @@ func (s *PaymentConfigService) GetAvailableMethodLimits(ctx context.Context) (*M
 		return nil, fmt.Errorf("query provider instances: %w", err)
 	}
 	typeInstances := pcGroupByPaymentType(instances)
-	if s.settingRepo != nil {
-		vals, err := s.settingRepo.GetMultiple(ctx, []string{
-			SettingPaymentVisibleMethodAlipayEnabled,
-			SettingPaymentVisibleMethodAlipaySource,
-			SettingPaymentVisibleMethodWxpayEnabled,
-			SettingPaymentVisibleMethodWxpaySource,
-		})
-		if err != nil {
-			return nil, fmt.Errorf("query visible method settings: %w", err)
-		}
-		typeInstances = pcApplyVisibleMethodRouting(typeInstances, vals, buildVisibleMethodSourceAvailability(instances))
-	}
+	typeInstances = pcApplyEnabledVisibleMethodInstances(typeInstances, instances)
 	resp := &MethodLimitsResponse{
 		Methods: make(map[string]MethodLimits, len(typeInstances)),
 	}
@@ -43,6 +32,27 @@ func (s *PaymentConfigService) GetAvailableMethodLimits(ctx context.Context) (*M
 	return resp, nil
 }
 
+func pcApplyEnabledVisibleMethodInstances(typeInstances map[string][]*dbent.PaymentProviderInstance, instances []*dbent.PaymentProviderInstance) map[string][]*dbent.PaymentProviderInstance {
+	if len(typeInstances) == 0 {
+		return typeInstances
+	}
+
+	filtered := make(map[string][]*dbent.PaymentProviderInstance, len(typeInstances))
+	for paymentType, groupedInstances := range typeInstances {
+		filtered[paymentType] = groupedInstances
+	}
+
+	for _, method := range []string{payment.TypeAlipay, payment.TypeWxpay} {
+		matching := filterEnabledVisibleMethodInstances(instances, method)
+		if len(matching) != 1 {
+			delete(filtered, method)
+			continue
+		}
+		filtered[method] = []*dbent.PaymentProviderInstance{matching[0]}
+	}
+	return filtered
+}
+
 func pcApplyVisibleMethodRouting(typeInstances map[string][]*dbent.PaymentProviderInstance, vals map[string]string, available map[string]bool) map[string][]*dbent.PaymentProviderInstance {
 	if len(typeInstances) == 0 {
 		return typeInstances