Tendermint

Byzantine-Fault Tolerant State Machine Replication. Or Blockchain for short.

Branch	Tests	Coverage
master
develop

NOTE: This is alpha software. Please contact us if you intend to run it in production.

Tendermint Core is 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.

Security

To report a security vulnerability, see our bug bounty program.

For examples of the kinds of bugs we're looking for, see SECURITY.md

Minimum requirements

Requirement	Notes
Go version	Go1.9 or higher

Install

See the install instructions

Quick Start

• Single node
• Local cluster using docker-compose
• Remote cluster using terraform and ansible

Resources

Tendermint Core

For more, Read The Docs. Additional information about some - and eventually all - of the sub-projects below, can be found at Read The Docs.

Sub-projects

• ABCI, the Application Blockchain Interface
• Go-Wire, a deterministic serialization library
• Go-Crypto, an elliptic curve cryptography library
• TmLibs, an assortment of Go libraries used internally
• IAVL, Merkleized IAVL+ Tree implementation

Tools

• Deployment, Benchmarking, and Monitoring

Applications

• Cosmos SDK; a cryptocurrency application framework
• Ethermint; Ethereum on Tendermint
• Many more

More

• Master's Thesis on Tendermint
• Original Whitepaper
• Tendermint Blog
• Cosmos Blog

Contributing

Yay open source! Please see our contributing guidelines.

Versioning

SemVer

Tendermint uses SemVer 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 Tendermint users in these 0.X.X days, the MINOR version is used to signal breaking changes across a subset of the total public API. This subset includes all interfaces exposed to other processes (cli, rpc, p2p, etc.), but does not include the in-process Go APIs.

That said, breaking changes in the following packages will be documented in the CHANGELOG even if they don't lead to MINOR version bumps:

• types
• rpc/client
• config
• node

Exported objects in these packages that are not covered by the versioning scheme are explicitly marked by // UNSTABLE in their go doc comment and may change at any time. Functions, types, and values in any other package may also change at any time.

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 histories (if not please open an issue).

Code of Conduct

Please read, understand and adhere to our code of conduct.