2021 Q2 Hyperledger Burrow

Created by Silas Davis, last modified by David Enyeart on Jul 29, 2021

Project Health

Burrow is doing better than ever before. We’ve added some significant features and random people from the internet are fixing our off-by-ones . We also have a new team, Damascus Mile, with funding from the UK Cabinet Office who are building out a logistics platform on top of Burrow.

Required Information

  1. Have you switched from master to main in all your repos ? yes
  2. Have you implemented repolinter.json in all your repos ? yes

Questions/Issues for the TSC

No issues, but would like to call out Typescript code generation (AKA solts) along with the improved Javascript/Typescript client gives a vastly   improved application-building experience (here is an example of the generated code ). @hyperledger/burrow now exposes a `build` function that takes a Solidity source tree and generates strongly typed bindings for Burrow that embed the contract bytecode, ABI, metadata, and allows you to deploy the contract, stream events, and call functions all via a strongly typed interfaces. Kudos to  Gregory Hill for building the original solts.

Um, as ever, this is not very well documented ¯\_(ツ)_/¯ .


  • 0.31.1 - Web3 and Vent fixes
  • 0.31.2 - Dump/restore fixes
  • 0.31.3 - Dump/restore improvements
  • 0.32.0 - Burrow.js rewrite in Typescript, better ABI library, core state cache concurrency fix
  • 0.32.1 - Improved errors and Javascript type coercion
  • 0.33.0 - Introduced Solidity-to-Typescript client-side code generation, fixed client-side events, fixed finite stream bounds
  • 0.33.1 - Inline JS source maps and fixed BytesNN typing
  • 0.34.0 - Simplified JS codegen Provider interface (supporting other implementations), codegen fixes

See https://github.com/hyperledger/burrow/blob/main/CHANGELOG.md for more details.

Overall Activity in the Past Quarter

Chat remains relatively quiet generating a handful of messages per month. Github has seen some small but deep patches which seems to indicate there is some ‘serious’ usage going on. Damascus Mile has chosen to use Burrow as an ideal ‘root stock’ for their logistics project - hopefully evidence of Burrow’s effort to be extensible and modular. Development activity has picked up quite a bit over previous two quarters.

Current Plans

Two major roadmap items are in play:

  1. State-splitting - providing a better way to divide account state while preserving commitments/proofs. Also the possibility of projecting out some state in an ‘export’ while preserving proofs. The relevance being around state channels/optimistic roll-ups where we would like to be able to provide a more granular subset of state than our current single global state root allows.
  2. Providing more practical support for WASM contracts (including AssemblyScript being given our Typescript leanings) by providing client library support and doing more testing.

Maintainer Diversity

We have added Ommi Shimizu from Monax.

Active Maintainers

Contributor Diversity

We have had around five new individual contributors this quarter and interest in using us from Damascus Mile.

Reviewed By


Is there an LFX insights link?

Posted by shemnon at Jun 02, 2021 17:12

Insights (linuxfoundation.org)  for April and May 2021

Posted by tkuhrt at Jun 02, 2021 17:46

Are we not requiring the report to have it in-report anymore?

Posted by shemnon at Jun 02, 2021 17:48