Mir and Trantor

Alongside the scaling framework, the IPC project is developing high-performance consensus protocols that are suitable for subnet use.
Beyond their function as a scaling tool, IPC subnets will be deployed to meet the requirements of applications that cannot be run on the Filecoin rootnet. The combination of Mir and Trantor provides a high-performance consensus mechanism with faster finality and higher throughput. Moreover, Trantor can be further configured for each subnet.

Mir framework

Mir is a framework for implementing, debugging, and analyzing distributed protocols. It is organized as a library that provides abstractions representing different components of a distributed system and an engine to orchestrate their interaction.
The goal of Mir is to enable the implementation of distributed protocols in a way that is agnostic to network transport, storage, and cryptographic primitives. These components of a distributed protocol implementation are encapsulated in abstractions with well-defined interfaces. While Mir provides some out-of-the-box implementations, users are free to define their own.
Mir is used as a scalable and efficient consensus layer in Filecoin subnets. Learn more at GitHub.

Trantor consensus protocol

Trantor is a modern, multi-leader, Byzantine fault-tolerant (BFT) protocol. It was inspired by recently proposed, high-throughput, BFT consensus protocols, namely ISS and Narwahl. Trantor iterates through instances of PBFT with immediate finality, each block containing an ordered list of decided transactions and a certificate for verification, with every nth block containing a checkpoint of the state.
Learn more on GitHub.
To stay updated on Mir and Trantor development, join the #mir-dev channel in the Filecoin Slack workspace.