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khushal
2025-01-03 18:33:26 +05:30
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utils_v2/trading/zerodha_kite/controllers/__init__.py
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utils_v2/trading/zerodha_kite/controllers/async_zerodha_kite.py
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"""
AUTHOR:
Khushal P Soonderji
DATE:
Friday, 27th Dec., 2024
OBJECTIVE:
To provide a way to interface with Zerodha's Kite API in an asynchronous manner. Zerodha provides a great client
library, but it works only in sync mode. Here we will try to build an asynchronous version of the same for
more advance use cases.
REFERENCES:
01. Official documentation: https://kite.trade/docs/connect/v3/
DOWNLOADS:
N/A
"""
# *****************************************************************************************************************
# ***** ****
# *** IMPORT ***
# ***** ****
# *****************************************************************************************************************
# To make sibling directories accessible for imports:
import sys
sys.path.append(".")
sys.path.append("..")
# System-level activities:
import io
import os
# My utils:
from utils_v2.string import json
from utils_v2.system import files
from utils_v2.security.hash import Hasher
from utils_v2.date_time import date_time
# Data models:
from utils_v2.trading.zerodha_kite.models.api_call import ZerodhaKiteApiResponse
from utils_v2.trading.zerodha_kite.models.auth_tokens import ZerodhaKiteAuthTokens
# To make API calls:
import httpx
# To work with date and time:
import datetime
# For working with datatypes:
from typing import Literal, List
# For debugging:
from icecream import IceCreamDebugger
import inspect
# *****************************************************************************************************************
# ***** ****
# *** MACROS / ONE-TIME INIT ***
# ***** ****
# *****************************************************************************************************************
# --- Nothing Yet
# *****************************************************************************************************************
# ***** ****
# *** VARIABLES ***
# ***** ****
# *****************************************************************************************************************
# --- Nothing Yet
# *****************************************************************************************************************
# ***** ****
# *** FUNCTIONS ***
# ***** ****
# *****************************************************************************************************************
# --- Nothing Yet
# *****************************************************************************************************************
# ***** ****
# *** CLASSES ***
# ***** ****
# *****************************************************************************************************************
class AsyncZerodhaKite:
def __init__(
self,
api_key: str,
api_secret: str,
http_client: httpx.AsyncClient = None,
debug = True,
debug_prefix = "Z-Kite | ",
debug_only_errors = True
):
"""
To initialize the instance of this Telegram messenger.
:param api_key: The API key that identifies your app. Note that this doesn't change in the lifecycle of the app.
:param api_secret: The API secret to access your app. Note that this can be changed from the API portal. This is
meant to be kept more secure than the simple API key.
:param http_client: An instance of 'httpx' library's AsyncClient. If not given, one will be instantiated
internally. It is recommended that, for multi-bot use cases, you provide a common HTTP client from outside.
:param debug: Whether, or not, you would like to show debugging messages on the terminal.
:param debug_prefix: The prefix string to identify the debugging messages.
:param debug_only_errors: Whether you would like to show all debugging messages or just error messages.
"""
# Prepare the debugging utility:
self._debug_prefix = debug_prefix
self._printer = IceCreamDebugger(prefix = debug_prefix, includeContext = True)
if not debug: self._printer.disable()
self._debug_only_errors = debug_only_errors
# Accept the input configuration:
self.__api_key = api_key
self.__api_secret = api_secret
self.__request_token = None
self.__access_token = None
self.__checksum = None
# Accept/create an HTTP client to work with:
if http_client: self.__http_client = http_client
else: self.__http_client = httpx.AsyncClient(
limits = httpx.Limits(
max_connections = 100, # ............ Maximum number of connections allowed in the pool.
max_keepalive_connections = 50, # ... Maximum number of connections that can be kept alive.
),
timeout = httpx.Timeout(
pool = 120.0, # .... Time to wait for a free connection from the pool.
connect = 5.0, # ... Time to wait for establishing a connection to the server.
write = 10.0, # .... Time to wait for sending data.
read = 120.0 # ..... Time to wait for receiving data.
)
)
def enable_debug(self):
self._printer.enable()
def disable_debug(self):
self._printer.disable()
def debug_only_errors(self):
self._debug_only_errors = True
def debug_everything(self):
self._debug_only_errors = False
# ┏┓┏┓┳ ┏┓ ┓┓•
# ┣┫┃┃┃ ┃ ┏┓┃┃┓┏┓┏┓
# ┛┗┣┛┻ ┗┛┗┻┗┗┗┛┗┗┫
# ┛
async def __get(
self,
url: str,
headers: dict = None,
params: dict = None
) -> ZerodhaKiteApiResponse:
"""
To call an API using the GET method.
:param url: The URL to call.
:param headers: The headers to pass.
:param params: The params to send in the query string itself.
:return: A structured response that includes the raw response, the exception (if any), and so on.
"""
# Prepare the structure of the response:
api_response = ZerodhaKiteApiResponse(
action = inspect.stack()[1].function,
url = url,
method = "GET"
)
try:
# Make the API call:
response = await self.__http_client.get(
url = url,
headers = headers,
params = params
)
# Note down the results:
api_response.response = response
api_response.httpCode = response.status_code
api_response.message = response.reason_phrase
# Check for errors:
await api_response.note_error()
# If something goes wrong:
except Exception as exception:
api_response.exception = exception
api_response.message = str(exception)
self._printer(exception, api_response.url, api_response.method, headers, params)
# Done here:
return api_response
async def __post(
self,
url: str,
headers: dict = None,
json: dict = None,
data: dict = None,
params: dict = None,
content: str | bytes = None,
files: dict = None
) -> ZerodhaKiteApiResponse:
"""
To call an API using the POST method.
:param url: The URL to call.
:param headers: The headers to pass.
:param json: The params to send in the JSON body.
:param data: The params to send in the form-data in the body.
:param params: The params to send in the query string itself.
:param content: The raw content to be sent in the body (typically as an octet-stream).
:param files: Any file that you may want to send.
:return: A structured response that includes the raw response, the exception (if any), and so on.
"""
# Prepare the structure of the response:
api_response = ZerodhaKiteApiResponse(
action = inspect.stack()[1].function,
url = url,
method = "POST"
)
try:
# Make the API call:
response = await self.__http_client.post(
url = url,
headers = headers,
json = json,
data = data,
params = params,
content = content,
files = files
)
# Note down the results:
api_response.response = response
api_response.httpCode = response.status_code
api_response.message = response.reason_phrase
# Check for errors:
await api_response.note_error()
# If something goes wrong:
except Exception as exception:
api_response.exception = exception
api_response.message = str(exception)
self._printer(exception, api_response.url, api_response.method, headers, json, data)
# Done here:
return api_response
# ┏┓ ┓
# ┣┫┓┏╋┣┓
# ┛┗┗┻┗┛┗
@property
def login_url(self) -> str:
"""
Generate the login URL that the user can use to log in to his Zerodha account for this app.
DOCUMENTATION:
01. https://kite.trade/docs/connect/v3/user/
:return: The login URL that the user must use.
"""
return f"https://kite.zerodha.com/connect/login?api_key={self.__api_key}"
def set_request_token(
self,
request_token: str
) -> None:
"""
When the user authorizes the login flow, Zerodha's serve will send you a GET request on the callback URL that
you set on the PI portal for your app. This callback will have, among other things, a 'request_token'. The
request token is valid only for a very short period, and must be used to get a longer token called
'access_token' for actual activities. A checksum is needed for verification. Read about it in the official
documentation on Kite's API docs.
DOCUMENTATION:
01. https://kite.trade/docs/connect/v3/user/
:param request_token: The request token received from Zerodha when the user logs in.
:return: None.
"""
self.__request_token = request_token
hasher = Hasher()
hasher.update(self.__api_key + request_token + self.__api_secret)
self.__checksum = hasher.hexdigest()
async def generate_session(
self,
raise_exception = False
) -> ZerodhaKiteAuthTokens | None:
"""
Once we have the 'request_token' from Zerodha's callback, we must generate a session by fetching an access
token. The access token will be used to perform most of the actual activities.
DOCUMENTATION:
01. https://kite.trade/docs/connect/v3/user/
:return: Either the auth-token model of Zerodha, or null if the process failed.
"""
# Start by assuming failure:
session = None
# Try to get a session from Zerodha:
client_response = await self.__post(
url = r"https://api.kite.trade/session/token",
headers = {"X-Kite-Version": "3"},
data = {
"api_key": self.__api_key,
"request_token": self.__request_token,
"checksum": self.__checksum
}
)
# If the API call was successful, we have a valid session:
if client_response.success:
client_json = await client_response.get_json()
self.__access_token = client_json["data"]["access_token"]
print(client_response.to_markdown())
print("CLIENT RESPONSE;", json.to_string(await client_response.get_json()))
print(json.to_string(client_response.model_dump(), default = str))
# *****************************************************************************************************************
# ***** ****
# *** MAIN PROGRAM ***
# ***** ****
# *****************************************************************************************************************
if __name__ == "__main__":
import asyncio
async def main():
# Read the credentials:
creds = json.from_file(r"../../../../creds/zerodha/api.json")
# Create the client:
my_kite = AsyncZerodhaKite(
api_key = creds["apiKey"],
api_secret = creds["apiSecret"]
)
# Login flow:
print("LOGIN URL:", my_kite.login_url)
my_kite.set_request_token(input("Request Token: "))
await my_kite.generate_session()
asyncio.run(main())