Practical Byzantine Fault Tolerance is usually a consensus algorithm launched in the late 90s by Barbara Liskov and Miguel Castro. pBFT was designed to work competently in asynchronous(no upper bound on when the reaction to your ask for will be been given) methods. It's optimized for low overhead time. https://financefeeds.com/pretiorates-thoughts-85-the-oil-heat-wave-that-could-ice-the-market/