# Telegram Authentication Module
This Python package provides an authentication mechanism for Telegram web apps. It implements the algorithm for validating data received from a Telegram web app, ensuring the authenticity and integrity of the data. For detailed information on validating data received via a web app, please refer to the [official Telegram documentation](https://core.telegram.org/bots/webapps#validating-data-received-via-the-web-app).
## Installation
To use this module, you need to have Python 3.x installed. Install the necessary dependencies using pip:
```bash
pip install telegram_webapps_authentication
```
## Example
Here is an example of how to use the `Authenticator` class with FastAPI:
```python
from typing import Optional
from fastapi import FastAPI, HTTPException, Header, Depends
from pydantic import BaseModel
from telegram_webapps_authentication import Authenticator, TelegramUser
app = FastAPI()
BOT_TOKEN = "YOUR_BOT_TOKEN" # Replace it with your real telegram bot token
authenticator = Authenticator(BOT_TOKEN)
class Message(BaseModel):
text: str
@app.get("/validate")
def validate_init_data(authorization: Optional[str] = Header()):
try:
if authenticator.validate_init_data(authorization):
initial_data = authenticator.get_initial_data(authorization)
return {"message": initial_data.dict()}
else:
raise HTTPException(status_code=400, detail="Data is not valid")
except Exception as e:
raise HTTPException(status_code=400, detail=str(e))
@app.get("/get_user")
def get_user_instance(authorization: Optional[str] = Header()):
user = authenticator.get_telegram_user(authorization)
return user
@app.post("/message")
async def send_message(
message: Message,
user: TelegramUser = Depends(authenticator.get_telegram_user),
):
"""
Your backend logic
"""
...
```
# Documentation
## Data Models
### `TelegramUser`
Represents a Telegram user.
- **Attributes:**
- `id` (int): User ID.
- `first_name` (str): User's first name.
- `last_name` (str): User's last name.
- `username` (str): User's username.
- `language_code` (str): User's language code.
### `InitialData`
Represents the initial data received from Telegram.
- **Attributes:**
- `query_id` (str): Unique query ID.
- `user` (`TelegramUser`): User information.
- `auth_date` (str): Authentication date.
- `hash` (str): Hash for data validation.
## `Authenticator` Class
The `Authenticator` class provides methods for handling and validating the initial data from Telegram.
### `__init__(self, bot_token: str)`
Initializes the `Authenticator` with a bot token.
- **Args:**
- `bot_token` (str): Token for the Telegram bot.
### `initial_data_parse(self, init_data: str) -> Dict[str, Any]`
Parses the initial data from a query string format into a dictionary.
- **Args:**
- `init_data` (str): Initial data in query string format.
- **Returns:**
- `Dict[str, Any]`: Parsed data as a dictionary.
- **Raises:**
- `ValueError`: If any required keys are missing in the data.
### `initial_data_prepare(self, init_data_dict: Dict[str, Any]) -> str`
Prepares the cleaned data string by excluding the 'hash' key and sorting the remaining key-value pairs.
- **Args:**
- `init_data_dict` (Dict[str, Any]): Dictionary of initial data.
- **Returns:**
- `str`: Prepared data string.
- **Raises:**
- `ValueError`: If `init_data_dict` is empty or if no data is available after excluding the 'hash' key.
- `TypeError`: If any value is not a string.
### `extract_user_data(self, init_data: str) -> Dict[str, str]`
Extracts user-specific data from the initial data.
- **Args:**
- `init_data` (str): Initial data in query string format.
- **Returns:**
- `Dict[str, str]`: Extracted user data.
- **Raises:**
- `ValueError`: If 'user' key is missing in initial data or if user data is not valid JSON.
### `validate_init_data(self, init_data: str) -> bool`
Validates the initial data by comparing the provided hash with the computed hash.
- **Args:**
- `init_data` (str): Initial data in query string format.
- **Returns:**
- `bool`: True if the data is valid, False otherwise.
- **Raises:**
- `ValueError`: If 'hash' key is not found in `init_data`.
### `get_telegram_user(self, init_data: str) -> TelegramUser`
Extracts and returns a `TelegramUser` object from the initial data.
- **Args:**
- `init_data` (str): Initial data in query string format.
- **Returns:**
- `TelegramUser`: Extracted Telegram user information.
- **Raises:**
- `ValueError`: If `init_data` is not valid.
### `get_initial_data(self, init_data: str) -> InitialData`
Extracts and returns an `InitialData` object from the initial data.
- **Args:**
- `init_data` (str): Initial data in query string format.
- **Returns:**
- `InitialData`: Extracted initial data information.
- **Raises:**
- `ValueError`: If `init_data` is not valid.
### `encode_init_data(self, data: str) -> str`
Encodes initial data to base64 format.
- **Args:**
- `data` (str): Data to be encoded.
- **Returns:**
- `str`: Base64 encoded data.
### `decode_init_data(self, encoded_data: str) -> str`
Decodes initial data from base64 format.
- **Args:**
- `encoded_data` (str): Base64 encoded data.
- **Returns:**
- `str`: Decoded data.
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"description": "# Telegram Authentication Module\r\n\r\nThis Python package provides an authentication mechanism for Telegram web apps. It implements the algorithm for validating data received from a Telegram web app, ensuring the authenticity and integrity of the data. For detailed information on validating data received via a web app, please refer to the [official Telegram documentation](https://core.telegram.org/bots/webapps#validating-data-received-via-the-web-app).\r\n\r\n## Installation\r\n\r\nTo use this module, you need to have Python 3.x installed. Install the necessary dependencies using pip:\r\n\r\n```bash\r\npip install telegram_webapps_authentication\r\n```\r\n## Example\r\n\r\nHere is an example of how to use the `Authenticator` class with FastAPI:\r\n\r\n```python\r\nfrom typing import Optional\r\n\r\nfrom fastapi import FastAPI, HTTPException, Header, Depends\r\nfrom pydantic import BaseModel\r\n\r\nfrom telegram_webapps_authentication import Authenticator, TelegramUser\r\n\r\napp = FastAPI()\r\n\r\nBOT_TOKEN = \"YOUR_BOT_TOKEN\" # Replace it with your real telegram bot token\r\nauthenticator = Authenticator(BOT_TOKEN)\r\n\r\nclass Message(BaseModel):\r\n text: str\r\n\r\n@app.get(\"/validate\")\r\ndef validate_init_data(authorization: Optional[str] = Header()):\r\n try:\r\n if authenticator.validate_init_data(authorization):\r\n initial_data = authenticator.get_initial_data(authorization)\r\n return {\"message\": initial_data.dict()}\r\n else:\r\n raise HTTPException(status_code=400, detail=\"Data is not valid\")\r\n except Exception as e:\r\n raise HTTPException(status_code=400, detail=str(e))\r\n\r\n@app.get(\"/get_user\")\r\ndef get_user_instance(authorization: Optional[str] = Header()):\r\n user = authenticator.get_telegram_user(authorization)\r\n return user\r\n\r\n@app.post(\"/message\")\r\nasync def send_message(\r\n message: Message,\r\n user: TelegramUser = Depends(authenticator.get_telegram_user),\r\n):\r\n \"\"\"\r\n Your backend logic\r\n \"\"\"\r\n ...\r\n```\r\n\r\n# Documentation\r\n\r\n## Data Models\r\n\r\n### `TelegramUser`\r\n\r\nRepresents a Telegram user.\r\n\r\n- **Attributes:**\r\n - `id` (int): User ID.\r\n - `first_name` (str): User's first name.\r\n - `last_name` (str): User's last name.\r\n - `username` (str): User's username.\r\n - `language_code` (str): User's language code.\r\n\r\n### `InitialData`\r\n\r\nRepresents the initial data received from Telegram.\r\n\r\n- **Attributes:**\r\n - `query_id` (str): Unique query ID.\r\n - `user` (`TelegramUser`): User information.\r\n - `auth_date` (str): Authentication date.\r\n - `hash` (str): Hash for data validation.\r\n\r\n## `Authenticator` Class\r\n\r\nThe `Authenticator` class provides methods for handling and validating the initial data from Telegram.\r\n\r\n### `__init__(self, bot_token: str)`\r\n\r\nInitializes the `Authenticator` with a bot token.\r\n\r\n- **Args:**\r\n - `bot_token` (str): Token for the Telegram bot.\r\n\r\n### `initial_data_parse(self, init_data: str) -> Dict[str, Any]`\r\n\r\nParses the initial data from a query string format into a dictionary.\r\n\r\n- **Args:**\r\n - `init_data` (str): Initial data in query string format.\r\n- **Returns:**\r\n - `Dict[str, Any]`: Parsed data as a dictionary.\r\n- **Raises:**\r\n - `ValueError`: If any required keys are missing in the data.\r\n\r\n### `initial_data_prepare(self, init_data_dict: Dict[str, Any]) -> str`\r\n\r\nPrepares the cleaned data string by excluding the 'hash' key and sorting the remaining key-value pairs.\r\n\r\n- **Args:**\r\n - `init_data_dict` (Dict[str, Any]): Dictionary of initial data.\r\n- **Returns:**\r\n - `str`: Prepared data string.\r\n- **Raises:**\r\n - `ValueError`: If `init_data_dict` is empty or if no data is available after excluding the 'hash' key.\r\n - `TypeError`: If any value is not a string.\r\n\r\n### `extract_user_data(self, init_data: str) -> Dict[str, str]`\r\n\r\nExtracts user-specific data from the initial data.\r\n\r\n- **Args:**\r\n - `init_data` (str): Initial data in query string format.\r\n- **Returns:**\r\n - `Dict[str, str]`: Extracted user data.\r\n- **Raises:**\r\n - `ValueError`: If 'user' key is missing in initial data or if user data is not valid JSON.\r\n\r\n### `validate_init_data(self, init_data: str) -> bool`\r\n\r\nValidates the initial data by comparing the provided hash with the computed hash.\r\n\r\n- **Args:**\r\n - `init_data` (str): Initial data in query string format.\r\n- **Returns:**\r\n - `bool`: True if the data is valid, False otherwise.\r\n- **Raises:**\r\n - `ValueError`: If 'hash' key is not found in `init_data`.\r\n\r\n### `get_telegram_user(self, init_data: str) -> TelegramUser`\r\n\r\nExtracts and returns a `TelegramUser` object from the initial data.\r\n\r\n- **Args:**\r\n - `init_data` (str): Initial data in query string format.\r\n- **Returns:**\r\n - `TelegramUser`: Extracted Telegram user information.\r\n- **Raises:**\r\n - `ValueError`: If `init_data` is not valid.\r\n\r\n### `get_initial_data(self, init_data: str) -> InitialData`\r\n\r\nExtracts and returns an `InitialData` object from the initial data.\r\n\r\n- **Args:**\r\n - `init_data` (str): Initial data in query string format.\r\n- **Returns:**\r\n - `InitialData`: Extracted initial data information.\r\n- **Raises:**\r\n - `ValueError`: If `init_data` is not valid.\r\n\r\n### `encode_init_data(self, data: str) -> str`\r\n\r\nEncodes initial data to base64 format.\r\n\r\n- **Args:**\r\n - `data` (str): Data to be encoded.\r\n- **Returns:**\r\n - `str`: Base64 encoded data.\r\n\r\n### `decode_init_data(self, encoded_data: str) -> str`\r\n\r\nDecodes initial data from base64 format.\r\n\r\n- **Args:**\r\n - `encoded_data` (str): Base64 encoded data.\r\n- **Returns:**\r\n - `str`: Decoded data.\r\n",
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