feat: billing guest access

external/billing/billing_client.py

@@ -0,0 +1,27 @@
+import aiohttp
+
+from .schemas import *
+
+
+class BillingClient:
+    def __init__(self, api_key: str):
+        self.api_key = api_key
+        self.headers = {
+            'Authorization': f'Bearer {self.api_key}'
+        }
+        self.base_url = 'https://billing.denco.store'
+
+    async def _method(self, http_method, method, **kwargs):
+        async with aiohttp.ClientSession(headers=self.headers) as session:
+            async with session.request(http_method, self.base_url + method, **kwargs) as response:
+                return await response.json()
+
+    async def create(self, request: CreateBillRequestSchema) -> CreateBillingResponseSchema:
+        json_data = request.model_dump()
+        response = await self._method('POST', '/create', json=json_data)
+        return CreateBillingResponseSchema.model_validate(response)
+
+    async def notify_received(self, request: NotifyReceivedBillRequestSchema) -> NotifyReceivedBillResponseSchema:
+        json_data = request.model_dump()
+        response = await self._method('POST', '/notify-received', json=json_data)
+        return NotifyReceivedBillResponseSchema.model_validate(response)