dexfather 0.4.0

Python SDK for the DexFather Bot API — build bots for the Dexster platform

DexFather

Python SDK for the Dexster Bot API

Build bots for the Dexster social trading platform with an async-first, fully typed Python SDK.

Install

pip install dexfather

Quick Start

import os
from dexfather import DexFatherBot

bot = DexFatherBot(os.environ["DEXSTER_BOT_TOKEN"])

@bot.command("start")
async def on_start(update, bot):
    await bot.send_message(
        update.message.chat.id,
        "Hello! I'm alive.",
    )

@bot.on_message()
async def on_echo(update, bot):
    await bot.send_message(
        update.message.chat.id,
        f"You said: {update.message.text}",
    )

bot.run_polling()

Features

• Async/await -- built on httpx for non-blocking I/O
• Rich object models -- Pydantic v2 models for every API type (messages, users, chats, polls, etc.)
• Exception hierarchy -- BadRequest, Unauthorized, Forbidden, NotFound, RateLimited for precise error handling
• Automatic retries -- exponential backoff with jitter via tenacity
• Middleware pipeline -- plug in logging, timing, rate limiting, or custom pre/post processing
• Keyboard builders -- InlineKeyboardBuilder with fluent chaining and adjust() layout
• Conversation state machine -- ConversationHandler for multi-step flows with optional server-side persistence
• Inline queries -- handle @botusername inline queries with 20+ result types (article, photo, gif, video, audio, document, location, venue, contact + 8 cached variants)
• File uploads -- upload files via uploadFile API, get dxf_ file_ids, send by file_id with get_file()
• Composable filters -- TEXT & ~COMMAND, PHOTO | VIDEO, ChatType.PRIVATE, Regex(r"pattern") with boolean algebra
• Reactions -- handle incoming message_reaction updates with MessageReactionUpdated type
• Live location -- send, update, and stop live locations with send_location(), edit_message_live_location(), stop_message_live_location()
• Test utilities -- MockBot and TestClient for unit testing without a live server
• Full type hints -- py.typed marker for mypy/pyright support
• Multiple transports -- polling, WebSocket, and webhook (with Starlette/Uvicorn)

Token Format

Bot tokens use the dxt_<base64url> format. You receive one when creating a bot through @DexFather on Dexster.

Documentation

• Getting Started -- 5-minute tutorial from zero to working bot
• Examples -- Echo bot, keyboard bot, conversation bot, inline bot, admin bot, polls, webhooks
• API Reference -- Generated pdoc HTML covering all public classes and methods

Guides

• Keyboards & Buttons -- Inline keyboards, reply keyboards, button styling
• Inline Mode -- Handle @botusername inline queries
• Callbacks -- Callback query handling and patterns
• Chat Management -- Banning, promoting, permissions
• Conversations -- Multi-step conversation state machine
• Middleware -- Custom pre/post processing pipeline
• File Uploads -- Upload files, file_id system, send by file_id
• Reactions & Updates -- Reactions API and new update types
• Composable Filters -- Boolean filter composition for message handlers
• Live Location -- Real-time location sharing
• Testing -- Unit test your bot with MockBot and TestClient
• Migration from Telegram -- Side-by-side porting guide with 75+ method mappings

Examples

Example	Description
echo_bot.py	Minimal echo bot
keyboard_bot.py	Inline and reply keyboards
conversation_bot.py	Multi-step conversation state machine
inline_bot.py	Inline query handler
poll_bot.py	Creating and managing polls
admin_bot.py	Chat administration commands
menu_bot.py	Bot menu and commands
webhook_bot.py	Webhook mode with Starlette
file_upload_bot.py	File upload and file_id usage
reaction_bot.py	Reactions and reaction updates
filter_bot.py	Composable filter expressions
live_location_bot.py	Live location tracking
demo_bot.py	Full-featured demo covering all SDK capabilities

Requirements

• Python 3.9+
• Dependencies: httpx, pydantic, tenacity, structlog
• Optional: uvicorn + starlette for webhook mode (pip install dexfather[webhook])

License

MIT