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Burrow is a permissively licensed (Apache 2.0) EVM smart contract machine and Byzantine Fault Tolerant permissioned ledger that uses Tendermint consensus and implements some novel extensions to the EVM whilst remaining EVM-compliant. It provides EVM execution within the Ethereum account model and an internal token to meter computation in the permissioned setting with transactions finality.  Burrow is named after the trans-dimensional intergalactic tubules used by marmots to communicate.

Key Characteristics

Burrow has three primary aims:

  • To be a fast, light, lean single-process full Tendermint/EVM permissioned ledger with transaction finality

  • To provide a practical base for EVM extensions in a many-chain world

Burrow is not trying to be:

  • Highly pluggable (see Sawtooth or Fabric)

  • Hard to deploy


Documentation is available on the main repo of Burrow and burrow.js. Having gone through a period of consolidation we need help creating more high quality general tutorial documentation and specific task/component documentation.

Project Management

Burrow is being heavily tested as the core of the Agreements Network. It sits at the intersections of a number of emerging technologies:

- EVM contracts and host-native code contracts - Public permissioned networks - permissioned Ethereum and public Tendermint/Cosmos - Layer 2 scaling - acting as a side-chain or state channel

We aim to provide a robust blockchain node for running multiple interconnected chains in a many-chain world. As well as blurring the public/private chain divide.



Burrow's repository is on github here:

The Burrow binary contains everything you need to specify, configure, run, and deploy smart contracts to a chain.

  • burrow spec - for describing template genesis state

  • burrow configure - for realising a specific configuration (including key generation)

  • burrow keys - both a standalone key signing daemon and key generation tool

  • burrow deploy - a declarative Solidity compilation, chain management, testing, and smart contract deployment tool

  • burrow dump - a forensics, auditing, and data extraction tool

  • burrow snatives - a tool for interacting with Burrow's 'secure natives' - host code that is callable as if it were an EVM contract

  • burrow start - for starting a blockchain node

For deploying contracts you will need a local installation of Solidity.

Monax maintains Bosmarmot a satellite monorepo to Burrow that contains:

  • burrow.js - a Javascript client library for interacting with Burrow smart contracts

  • Vent - an EVM event to SQL database mapping layer - currently under development.

For previous versions of standalone Burrow you can find:


Burrow can be deployed in any environment but we have focussed on deploying related sets of validators (or validator pools) using Kubernetes/Helm and you can find helm charts here:


Please fork, branch, and make pull requests to the develop branch.

Our build, CI, and testing process is executed via our Makefile, see the comments there for details.

License Scans

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Mailing List

Chat (for questions and ephemeral discussions)


Quarterly updates




Burrow was approved for incubation on the 6th of April 2017 by the Hyperledger TSC.

Space contributors



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