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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.
Burrow has three primary aims:
To be a good compliant and simple EVM library friendly towards integrators (see for example https://github.com/hyperledger/sawtooth-seth)
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.
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: https://github.com/hyperledger/burrow
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:
Vent - an EVM event to SQL database mapping layer - currently under development.
For previous versions of standalone Burrow you can find:
docker images: https://hub.docker.com/r/hyperledger/burrow
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: https://github.com/helm/charts/tree/master/incubator/burrow.
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.
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