f7f4067968
Rework the internal plumbing of the server. This change does not modify the
exported interfaces or semantics of the package, and all the existing tests
still pass.
The main changes here are to:
- Simplify the interface for subscription indexing with a typed index rather
than a single nested map.
- Ensure orderly shutdown of channels, so that there is no longer a dynamic
race with concurrent publishers & subscribers at shutdown.
- Remove a layer of indirection between publishers and subscribers. This mainly
helps legibility.
- Remove order dependencies between registration and delivery.
- Add documentation comments where they seemed helpful, and clarified the
existing comments where it was practical.
Although performance was not a primary goal of this change, the simplifications
did very slightly reduce memory use and increase throughput on the existing
benchmarks, though the delta is not statistically significant.
BENCHMARK BEFORE AFTER SPEEDUP (%) B/op (B) B/op (A)
Benchmark10Clients-12 5947 5566 6.4 2017 1942
Benchmark100Clients-12 6111 5762 5.7 1992 1910
Benchmark1000Clients-12 6983 6344 9.2 2046 1959
Tendermint
Byzantine-Fault Tolerant State Machines. Or Blockchain, for short.
| Branch | Tests | Coverage | Linting |
|---|---|---|---|
| master |  |
 |
 |
Tendermint Core 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.
For protocol details, see the specification.
For detailed analysis of the consensus protocol, including safety and liveness proofs, see our recent paper, "The latest gossip on BFT consensus".
Releases
Please do not depend on master as your production branch. Use releases instead.
Tendermint has been in the production of private and public environments, most notably the blockchains of the Cosmos Network. we haven't released v1.0 yet since we are making breaking changes to the protocol and the APIs. See below for more details about versioning.
In any case, if you intend to run Tendermint in production, we're happy to help. You can contact us over email or join the chat.
More on how releases are conducted can be found here.
Security
To report a security vulnerability, see our bug bounty program. For examples of the kinds of bugs we're looking for, see our security policy.
We also maintain a dedicated mailing list for security updates. We will only ever use this mailing list to notify you of vulnerabilities and fixes in Tendermint Core. You can subscribe here.
Minimum requirements
| Requirement | Notes |
|---|---|
| Go version | Go1.16 or higher |
Documentation
Complete documentation can be found on the website.
Install
See the install instructions.
Quick Start
- Single node
- Local cluster using docker-compose
- Remote cluster using Terraform and Ansible
- Join the Cosmos testnet
Contributing
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, watch the Developer Sessions, and familiarize yourself with our Architectural Decision Records.
Versioning
Semantic Versioning
Tendermint uses Semantic Versioning to determine when and how the version changes. According to SemVer, anything in the public API can change at any time before version 1.0.0
To provide some stability to users of 0.X.X versions of Tendermint, the MINOR version is used to signal breaking changes across Tendermint's API. This API includes all publicly exposed types, functions, and methods in non-internal Go packages as well as the types and methods accessible via the Tendermint RPC interface.
Breaking changes to these public APIs will be documented in the CHANGELOG.
Upgrades
In an effort to avoid accumulating technical debt prior to 1.0.0, we do not guarantee that breaking changes (ie. bumps in the MINOR version) will work with existing Tendermint blockchains. In these cases you will have to start a new blockchain, or write something custom to get the old data into the new chain. However, any bump in the PATCH version should be compatible with existing blockchain histories.
For more information on upgrading, see UPGRADING.md.
Supported Versions
Because we are a small core team, we only ship patch updates, including security updates, to the most recent minor release and the second-most recent minor release. Consequently, we strongly recommend keeping Tendermint up-to-date. Upgrading instructions can be found in UPGRADING.md.
Resources
Tendermint Core
We keep a public up-to-date version of our roadmap here
For details about the blockchain data structures and the p2p protocols, see the Tendermint specification.
For details on using the software, see the documentation which is also hosted at: https://docs.tendermint.com/master/
Tools
Benchmarking is provided by tm-load-test.
Additional tooling can be found in /docs/tools.
Applications
- Cosmos SDK; a cryptocurrency application framework
- Ethermint; Ethereum on Tendermint
- Many more
Research
- The latest gossip on BFT consensus
- Master's Thesis on Tendermint
- Original Whitepaper: "Tendermint: Consensus Without Mining"
- Tendermint Core Blog
- Cosmos Blog
Join us!
Tendermint Core is maintained by Interchain GmbH. If you'd like to work full-time on Tendermint Core, we're hiring!
Funding for Tendermint Core development comes primarily from the Interchain Foundation, a Swiss non-profit. The Tendermint trademark is owned by Tendermint Inc., the for-profit entity that also maintains tendermint.com.