How to Add Token Swaps to a Telegram Bot

Telegram has over 1 billion monthly active users, and crypto trading bots are one of the fastest-growing categories on the platform. Bots like Banana Gun and Trojan have processed over $40 billion in cumulative swap volume, proving that users want to trade tokens without leaving their chat window. Adding token swaps to your own Telegram bot is simpler than you think: a single GET request to swapapi.dev returns ready-to-execute calldata, no API key required. This guide walks you through building a Telegram bot in TypeScript that fetches swap quotes, displays them to users, and submits on-chain transactions — all from a /swap command. What You'll Need Before you start, make sure you have: Node.js 18+ installed A Telegram account to create a bot via BotFather ethers.js v6 for on-chain transaction signing grammY — a TypeScript-first Telegram bot framework A wallet private key for signing (use a test wallet with small amounts) Basic TypeScript and Ethereum knowledge