Polymarket-Kalshi 15-min BTC Arbitrage Bot

This TypeScript/ FastAPI bot monitors real-time prices across Polymarket and Kalshi for 15-minute Bitcoin (BTC) prediction markets. When a price discrepancy exceeds the exchange fee threshold (net arbitrage edge), it simultaneously buys on the undervalued exchange and sells on the overvalued one, locking in a risk-free spread. The strategy uses a spread-maker approach to minimize slippage and includes risk control parameters such as maximum position size and auto-hedging. It supports both market and limit orders, with a focus on net-of-fees profitability. Verified results are not publicly available, but the 3-star GitHub repo indicates some community interest. Key risks include execution latency, exchange API outages, and sudden fee changes.