Practical Byzantine Fault Tolerance can be a consensus algorithm released from the late 90s by Barbara Liskov and Miguel Castro. pBFT was designed to work proficiently in asynchronous(no upper sure on when the response for the ask for will be gained) programs. It really is optimized for reduced overhead https://financefeeds.com/avail-goes-full-stack-to-capture-300bn-global-blockchain-infra-market/