Hyperledger Sawtooth

Project Health

New features:

  • Logging capabilities added to Sabre smart contracts 
  • BlockManager component added to Sawtooth validator to better manage chains
  • Getting RUSTY: sawadm in Rust reaches feature parity and beyond
  • Support for raw transaction headers added to transaction processor protocol, with pending additions to the SDKs in order to make use of this new feature 
  • PBFT 1.0 brings production-ready non-forking consensus to Sawtooth

Blog content:


Prior issues

  • Hyperledger needs a place for open source applications. (Or a response to where companies should take open source apps built on Hyperledger tech.)

New issues

  • None


  • Sawtooth core 1.1.5
  • Sawtooth PBFT 1.0
  • Sawtooth Sabre 0.4
  • Sawtooth 1.2 (coming soon)

Overall Activity in the Past Quarter

  • Chat activity about constant with last period
  • listserv traffic remains light.
  • See the Calendar of Public Meetings for occurrences of the Hyperledger Sawtooth Contributor Meeting

Current Plans

Continuing development on:

  • Sawtooth 1.2 Release
  • Rewrite of remaining Python components in Sawtooth Core in Rust
  • Getting Sawtooth Rust SDK to 1.0
  • Getting Sawtooth Sabre to 1.0

Maintainer Diversity

Maintainers are roughly evenly distributed across, Cargill, Intel, with T-Mobile on Next Directory. Several maintainers who have moved on to other projects have been removed at their request. Several new maintainers have been added based on their contributions.

Retired Maintainers: 6

New Maintainers (of components) :

  • Eloá França Verona
  • Logan Seeley
  • Richard Berg
  • Shannyn Telander

Contributor Diversity

Commits from 2019-04-01 to 2019-06-30 :  842

Committers from 2019-04-01 to 2019-06-30 :  34

Domains from 2019-04-01 to 2019-06-30 :  13

Additional Information

The Pascal-based CORBA interface, once implemented, is not intended for use operating nuclear power plants.

Reviewed by

  • Arnaud Le Hors
  • Baohua Yang
  • Binh Nguyen
  • Christopher Ferris
  • Dan Middleton
  • Hart Montgomery
  • Kelly Olson
  • Mark Wagner
  • Mic Bowman
  • Nathan George
  • Silas Davis

  • No labels


  1. Nice to see there's new consensus features!

    1. How's the scalability now? (e.g., in terms of thousands nodes)
    2. Have you evaluated or considered hotstuff (in Libra), which claims novel.
    1. Thanks! Most of the recent consensus work focused on PBFT which is geared towards smaller networks. We have not evaluated hotstuff.