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Published: Jan 15, 2024 License: Apache-2.0

README

Tendermint

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Byzantine-Fault Tolerant State Machines. Or Blockchain, for short.

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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.

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 is being used in production in both private and public environments, most notably the blockchains of the Cosmos Network. However, we are still making breaking changes to the protocol and the APIs and have not yet released v1.0. 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.

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 Go1.15 or higher

Documentation

Complete documentation can be found on the website.

Install

See the install instructions.

Quick Start

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 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 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:

  • crypto
  • config
  • libs
    • bech32
    • bits
    • bytes
    • json
    • log
    • math
    • net
    • os
    • protoio
    • rand
    • sync
    • strings
    • service
  • node
  • rpc/client
  • types
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

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
Research

Directories

Path Synopsis
abci
server
Package server is used to start a new ABCI server.
Package server is used to start a new ABCI server.
Package Behaviour provides a mechanism for reactors to report behaviour of peers.
Package Behaviour provides a mechanism for reactors to report behaviour of peers.
v0
v1
v2
cmd
merkle
Package merkle computes a deterministic minimal height Merkle tree hash.
Package merkle computes a deterministic minimal height Merkle tree hash.
xchacha20poly1305
Package xchacha20poly1305 creates an AEAD using hchacha, chacha, and poly1305 This allows for randomized nonces to be used in conjunction with chacha.
Package xchacha20poly1305 creates an AEAD using hchacha, chacha, and poly1305 This allows for randomized nonces to be used in conjunction with chacha.
Package evidence handles all evidence storage and gossiping from detection to block proposal.
Package evidence handles all evidence storage and gossiping from detection to block proposal.
libs
cli
events
Package events - Pub-Sub in go with event caching
Package events - Pub-Sub in go with event caching
flowrate
Package flowrate provides the tools for monitoring and limiting the flow rate of an arbitrary data stream.
Package flowrate provides the tools for monitoring and limiting the flow rate of an arbitrary data stream.
json
Package json provides functions for marshaling and unmarshaling JSON in a format that is backwards-compatible with Amino JSON encoding.
Package json provides functions for marshaling and unmarshaling JSON in a format that is backwards-compatible with Amino JSON encoding.
log
net
os
pubsub
Package pubsub implements a pub-sub model with a single publisher (Server) and multiple subscribers (clients).
Package pubsub implements a pub-sub model with a single publisher (Server) and multiple subscribers (clients).
pubsub/query
Package query provides a parser for a custom query format:
Package query provides a parser for a custom query format:
package light provides a light client implementation.
package light provides a light client implementation.
rpc
TODO: Better handle abci client errors.
TODO: Better handle abci client errors.
Package node is the main entry point, where the Node struct, which represents a full node, is defined.
Package node is the main entry point, where the Node struct, which represents a full node, is defined.
p2p
pex
upnp
Taken from taipei-torrent.
Taken from taipei-torrent.
Package privval provides different implementations of the types.PrivValidator.
Package privval provides different implementations of the types.PrivValidator.
proto
rpc
core
Package core defines the Tendermint RPC endpoints.
Package core defines the Tendermint RPC endpoints.
jsonrpc
HTTP RPC server supporting calls via uri params, jsonrpc over HTTP, and jsonrpc over websockets
HTTP RPC server supporting calls via uri params, jsonrpc over HTTP, and jsonrpc over websockets
jsonrpc/server
Commons for HTTP handling
Commons for HTTP handling
scripts
indexer/sink/psql
Package psql implements an event sink backed by a PostgreSQL database.
Package psql implements an event sink backed by a PostgreSQL database.
test
app
e2e/app
nolint: gosec
nolint: gosec
e2e/generator
nolint: gosec
nolint: gosec
e2e/node
nolint: goconst
nolint: goconst
e2e/pkg
nolint: gosec
nolint: gosec
e2e/runner
nolint: gosec
nolint: gosec
fuzz/p2p/addrbook
nolint: gosec
nolint: gosec
nolint: gosec
fuzz/p2p/pex/init-corpus
nolint: gosec
nolint: gosec
nolint: gosec
tools

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