contract signature part is done

core/apps/contracts/serializers/contract_signature.py

@@ -0,0 +1,34 @@
+from django.utils import timezone
+
+from rest_framework import serializers
+
+from core.apps.contracts.models.contract import ContractSignature, ContractSignatureCode
+
+
+class ContractSignatureListSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = ContractSignature
+        fields = [
+            'id', 'status', 'signature_type', 'is_signature'
+        ]
+    
+
+class ContractSignatureSerializer(serializers.Serializer):
+    code = serializers.IntegerField()
+    signature_id = serializers.UUIDField()
+
+    def validate(self, data):
+        user = self.context.get('user')
+        signature = ContractSignature.objects.filter(id=data.get('signature_id')).first()
+        if not signature:
+            raise serializers.ValidationError({"detail": "contract signature not found"})
+        if signature.contract_side.user != user:
+            raise serializers.ValidationError({'detail': 'this is not your code'})
+        signature_code = ContractSignatureCode.objects.filter(signature=signature, code=data.get('code')).first()
+        if not signature_code:
+            raise serializers.ValidationError({'detail': 'invalid code'})
+        if signature_code.expiration_time < timezone.now():
+            raise serializers.ValidationError({"detail": 'code is expired'})
+        data['contract'] = signature.contract_side.contract
+        data['contract_signature'] = signature
+        return data