Practical Byzantine Fault Tolerance can be a consensus algorithm introduced during the late 90s by Barbara Liskov and Miguel Castro. pBFT was designed to work proficiently in asynchronous(no upper certain on when the reaction for the ask for will be received) systems. It is actually optimized for small overhead https://financefeeds.com/metaplanet-surpasses-10000-btc-in-holdings-overtaking-copyright/