implement balance getting

uncloud_pay/serializers.py

@@ -5,6 +5,7 @@ from django.utils.translation import gettext_lazy as _
 
 from .models import *
 import uncloud_pay.stripe as uncloud_stripe
+from uncloud import AMOUNT_DECIMALS, AMOUNT_MAX_DIGITS
 
 ###
 # 2020-12 Checked code
@@ -32,29 +33,13 @@ class PaymentSerializer(serializers.ModelSerializer):
 
         return data
 
+class BalanceSerializer(serializers.Serializer):
+    balance = serializers.DecimalField(max_digits=AMOUNT_MAX_DIGITS, decimal_places=AMOUNT_DECIMALS)
+
 
 ################################################################################
 # Unchecked code
 
-###
-# Payments and Payment Methods.
-
-
-class UpdatePaymentMethodSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = PaymentMethod
-        fields = ['description', 'primary']
-
-class ChargePaymentMethodSerializer(serializers.Serializer):
-    amount = serializers.DecimalField(max_digits=10, decimal_places=2)
-
-class CreatePaymentMethodSerializer(serializers.ModelSerializer):
-    please_visit = serializers.CharField(read_only=True)
-
-    class Meta:
-        model = PaymentMethod
-        fields = ['source', 'description', 'primary', 'please_visit']
-
 
 ###
 # Orders & Products.