hyperledger/sawtooth-validator repository overview

The Sawtooth Validator is the core component for running a Sawtooth Distributed Ledger. It orchestrates transaction processing, communication among peers within a network, and consensus between peers, regarding the outcome of the transactions.

Transaction processing is managed through a local component network. Each node in the network requires a transaction processor for a given family to be connected on this local network.
Network communication is handled via a Gossip protocol Consensus is handled by the PoET consensus algorithm

Learn more at: https://sawtooth.hyperledger.org/docs/core/releases/latest/app_developers_guide.html⁠