Practical Byzantine Fault Tolerance is a consensus algorithm introduced within the late 90s by Barbara Liskov and Miguel Castro. pBFT was designed to work efficiently in asynchronous(no higher sure on when the reaction to your ask for will be gained) programs. It can be optimized for very low overhead https://financefeeds.com/garanti-bbva-kripto-selects-wyden-for-digital-asset-trading-infrastructure/