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Aptos is a Layer 1 Proof-of-Stake (PoS) blockchain that employs a novel smart contract programming language called Move, a Rust-based programming language that was independently developed by Meta (formerly Facebook)’s Diem blockchain engineers, envisioning a blockchain that brings mainstream adoption to web3 and empowers an ecosystem of DApps to solve real-world user problems.
Aptos uses two consensus protocols – Proof-of-Stake and AptosBFT.
AptosBFT is quite similar to DiemBFT, originally developed for Diem. “BFT '' means ‘Byzantine Fault-Tolerant,’ and a network is said to be Byzantine fault-tolerant if it can continue to operate normally even if some of its members go offline or turn malicious. It is a custom-made consensus algorithm based on the HotStuff protocol. While there are a lot of background technicalities around how the protocol secures the network, the algorithm analyzes the on-chain state and automatically updates leader rotations to adjust for non-responsive validators without human intervention.
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