CometBFT

CometBFT is a Byzantine fault tolerant consensus engine that replicates a state machine deterministically across many nodes. It is the engine layer underneath application-specific blockchains, handling networking, consensus, and ordering so the application only has to define state transitions. It is a fork and successor to Tendermint Core.

Applications connect over the Application Blockchain Interface (ABCI) and can be written in any language. ABCI++ extends that interface, adding hooks to customize each step of the consensus process, and the engine targets throughput of up to 10k transactions per second.

It powers the Cosmos stack and chains built on the Cosmos SDK. Quick start paths cover a single local node and a multi-node cluster via docker-compose.