Open source. Open possibilities.

FlashLoanArbitrage is a Node.js bot and smart contract for DeFi flash-loan arbitrage. The README says goflash.js monitors ETH/USDC prices on Chainlink, Uniswap V2, SushiSwap, Curve and Balancer, waits for a 0.9% spread, and triggers a contract that borrows USDC, trades ETH, repays the loan and converts profit back to ETH.

CCXT is a unified crypto trading API library supporting 100+ exchanges and prediction markets across JavaScript, TypeScript, Python, C#, PHP, Go, Java and Rust, with normalized REST and WebSocket access for market data and algorithmic trading.