Coverage for django_napse/api/orders/serializers/order_serializer.py: 58%

1from rest_framework import serializers 

2 

3from django_napse.core.models import Order 

4from django_napse.utils.constants import SIDES 

5 

6 

7class OrderSerializer(serializers.ModelSerializer): 

8 """. 

9 

10 { 

11 "side": "BUY", 

12 "completed": true, 

13 "spent": { 

14 "ticker": "BTC", 

15 "amount": 0.1, 

16 "price": 1, 

17 "value": 0.1, 

18 }, 

19 "received": { 

20 "ticker": "MATIC", 

21 "amount": 995, 

22 "price": 0.0001, 

23 "value": 0.095, 

24 }, 

25 "fees": { 

26 "ticker": "BTC", 

27 "amount": 5, 

28 "price": 0.0001, 

29 "value": 0.05, 

30 }, 

31 "created_at": "2021-09-01T12:00:00Z", 

32 } 

33 """ 

34 

35 spent = serializers.SerializerMethodField() 

36 received = serializers.SerializerMethodField() 

37 fees = serializers.SerializerMethodField() 

38 

39 class Meta: 

40 model = Order 

41 fields = [ 

42 "side", 

43 "completed", 

44 "spent", 

45 "received", 

46 "fees", 

47 "created_at", 

48 ] 

49 read_only_fields = fields 

50 

51 def get_spent(self, instance): 

52 """Return spend informations.""" 

53 exit_amount = instance.exit_amount_quote if instance.side == SIDES.BUY else instance.exit_amount_base 

54 amount = instance.debited_amount - exit_amount 

55 ticker = instance.tickers_info().get("spent_ticker") 

56 return { 

57 "ticker": ticker, 

58 "amount": amount, 

59 "price": 1, 

60 "value": amount, 

61 } 

62 

63 def get_received(self, instance): 

64 """Rerturn receive informations.""" 

65 amount = instance.exit_amount_base if instance.side == SIDES.BUY else instance.exit_amount_quote 

66 ticker = instance.tickers_info().get("received_ticker") 

67 price = instance.price 

68 return { 

69 "ticker": ticker, 

70 "amount": amount, 

71 "price": price, 

72 "value": amount * price, 

73 } 

74 

75 def get_fees(self, instance): 

76 return { 

77 "ticker": instance.fee_ticker, 

78 "amount": instance.fees, 

79 "value": instance.fees * instance.price, 

80 } 

81 

82 def save(self, **kwargs): 

83 error_msg: str = "It's impossible to create ormodify an order." 

84 raise serializers.ValidationError(error_msg)