Byzantine-Fault Tolerant State Machine Replication. Or Blockchain, for short.
Branch | Tests | Linting |
---|---|---|
main | ||
v1.x | ||
v0.38.x | ||
v0.37.x | ||
v0.34.x |
CometBFT is a Byzantine Fault Tolerant (BFT) middleware that takes a state transition machine - written in any programming language - and securely replicates it on many machines.
It is a fork of Tendermint Core and implements the Tendermint consensus algorithm.
For protocol details, refer to the CometBFT Specification.
For detailed analysis of the consensus protocol, including safety and liveness proofs, read our paper, "The latest gossip on BFT consensus".
Complete documentation can be found on the website.
Please do not depend on main
as your production branch, as it may receive
significant breaking changes at any time. Use
releases instead.
If you intend to run CometBFT in production, we're happy to help. To contact us, in order of preference:
#cometbft
More on how releases are conducted can be found here.
Please see SECURITY.md.
CometBFT version | Requirement | Version | Tested with |
---|---|---|---|
main | Go version | 1.22 or higher | 1.22 |
v1.x | Go version | 1.22 or higher | 1.22 |
v0.38.x | Go version | 1.21 or higher | 1.22 |
v0.37.x | Go version | 1.20 or higher | 1.22 |
v0.34.x | Go version | 1.20 or higher | 1.20 |
See the install guide.
Please abide by the Code of Conduct in all interactions.
Before contributing to the project, please take a look at the contributing guidelines and the style guide. You may also find it helpful to read the specifications, and familiarize yourself with our Architectural Decision Records (ADRs) and Request For Comments (RFCs).
As of v1, CometBFT uses the following approach to versioning:
We do not guarantee compatibility between major releases of CometBFT. Minor releases of the same major release series (v1.1, v1.2, etc.) should, unless otherwise specified, be compatible with each other. Patch releases of the same minor release series (v1.0.1, v1.0.2, etc.) are guaranteed to be compatible with each other.
For more detailed information on upgrading from one version to another, see UPGRADING.md.
Because we are a small core team, we have limited capacity to ship patch updates, including security updates. Consequently, we strongly recommend keeping CometBFT up-to-date. Upgrading instructions can be found in UPGRADING.md.
Currently supported versions include:
Below are links to the original Tendermint consensus algorithm and relevant whitepapers, which CometBFT will continue to build on.
CometBFT is currently maintained by Informal Systems. If you'd like to work full-time on CometBFT, we're hiring!
Funding for CometBFT development comes primarily from the Interchain Foundation, a Swiss non-profit. Informal Systems also maintains cometbft.com.