Lachesis Consensus Protocol and Fantom Opera Platform

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Added to collectionTop 100 Computer Science Papers 2021

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Lachesis Consensus Protocol and Fantom Opera Platform

Lachesis: Scalable Asynchronous BFT on DAG Streams

We introduce a new protocol, so-called lachesis, for distributed networks achieving byzantine fault tolerance (bft)~\cite{lachesis01}.

Each node in lachesis protocol operates on a local block dag, namely \emph{opera dag}.

Aiming for a low time to finality (ttf) for transactions, our general modelconsiders dag streams of high speed but asynchronous events.

Our general model of trustless system leverages participants'stake as their validating power~\cite{stakedag}.

Our novel consensus algorithm uses lamport timestamps, graph layering and concurrent common knowledge to guarantee a consistent total ordering of event blocks and transactions.

We integrate proof-of-stake (pos) into a dag model in lachesis protocol to improve performance and security.

We also propose a model to improve stake decentralization, and network safety and liveness.

Built on our novel lachesis protocol, fantom s opera platform is a public, leaderless, asynchronous, layer-1 blockchain with guaranteed deterministic finality.

Authors

Quan Nguyen, Andre Cronje, Michael Kong, Egor Lysenko, Alex Guzev

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