The Go implementation of the libp2p Networking Stack.

Table of Contents

• Background
• Usage
  • Examples
• Development
  • Using the go-libp2p Workspace
  • Tests
  • Packages
• Contribute
• Supported Go Versions

Background

libp2p is a networking stack and library modularized out of The IPFS Project, and bundled separately for other tools to use.

libp2p is the product of a long, and arduous quest of understanding -- a deep dive into the internet's network stack, and plentiful peer-to-peer protocols from the past. Building large-scale peer-to-peer systems has been complex and difficult in the last 15 years, and libp2p is a way to fix that. It is a "network stack" -- a protocol suite -- that cleanly separates concerns, and enables sophisticated applications to only use the protocols they absolutely need, without giving up interoperability and upgradeability. libp2p grew out of IPFS, but it is built so that lots of people can use it, for lots of different projects.

To learn more, check out the following resources:

• Our documentation
• Our community discussion forum
• The libp2p Specification
• js-libp2p implementation
• rust-libp2p implementation

Usage

This repository (go-libp2p) serves as the entrypoint to the universe of modules that compose the Go implementation of the libp2p stack.

You can start using go-libp2p in your Go application simply by adding imports from our repos, e.g.:

import "github.com/libp2p/go-libp2p"

Examples

Examples can be found in the examples folder.

Development

Using the go-libp2p Workspace

While developing, you may need to make changes to several modules at once, or you may want changes made locally in one module to be available for import by another.

The go-libp2p workspace provides a developer-oriented view of the modules that comprise go-libp2p.

Using the tooling in the workspace repository, you can checkout all of go-libp2p's module repos and enter "local mode", which adds replace directives to the go.mod files in each local working copy. When you build locally, the libp2p depdendencies will be resolved from your local working copies.

Once you've committed your changes, you can switch back to "remote mode", which removes the replace directives and pulls imports from the main go module cache.

See the workspace repo for more information.

Tests

go test ./... will run all tests in the repo.

Packages

This table is generated using the module package-table with package-table --data=package-list.json.

List of packages currently in existence for libp2p:

Name	CI/Travis	Coverage	Description
Libp2p
go-libp2p			go-libp2p entry point
go-libp2p-core			core interfaces, types, and abstractions
go-libp2p-blankhost			minimal implementation of the "host" interface
Network
go-libp2p-swarm			reference implementation of network state machine
Transport
go-ws-transport			WebSocket transport
go-tcp-transport			TCP transport
go-libp2p-quic-transport			QUIC transport
go-udp-transport			UDP transport
go-utp-transport			uTorrent transport (UTP)
go-libp2p-circuit			relay transport
go-libp2p-transport-upgrader			upgrades multiaddr-net connections into full libp2p transports
go-libp2p-reuseport-transport			partial transport for building transports that reuse ports
Encrypted Channels
go-libp2p-noise			Noise crypto channel
go-libp2p-tls			TLS 1.3+ crypto channel
go-conn-security-multistream			multistream multiplexed meta crypto channel
Private Network
go-libp2p-pnet			reference private networking implementation
Stream Muxers
go-libp2p-yamux			YAMUX stream multiplexer
go-libp2p-mplex			MPLEX stream multiplexer
NAT Traversal
go-libp2p-nat
Peerstore
go-libp2p-peerstore			reference implementation of peer metadata storage component
Connection Manager
go-libp2p-connmgr			reference implementation of connection manager
Routing
go-libp2p-record			record type and validator logic
go-libp2p-kad-dht			Kademlia-like router
go-libp2p-kbucket			Kademlia routing table helper types
go-libp2p-coral-dht			Router based on Coral DHT
go-libp2p-pubsub-router			record-store over pubsub adapter
Consensus
go-libp2p-consensus			consensus protocols interfaces
go-libp2p-raft			consensus implementation over raft
Pubsub
go-libp2p-pubsub			multiple pubsub over libp2p implementations
RPC
go-libp2p-gorpc			a simple RPC library for libp2p
Utilities/miscellaneous
go-libp2p-loggables			logging helpers
go-maddr-filter			multiaddr filtering helpers
go-libp2p-netutil			misc utilities
go-msgio			length prefixed data channel
go-addr-util			address utilities for libp2p swarm
go-buffer-pool			a variable size buffer pool for go
go-libp2p-routing-helpers			routing helpers
go-reuseport			enables reuse of addresses
go-sockaddr			utils for sockaddr conversions
go-flow-metrics			metrics library
go-libp2p-gostream			Go 'net' wrappers for libp2p
go-libp2p-http			HTTP on top of libp2p streams
Testing and examples
go-libp2p-testing			a collection of testing utilities for libp2p

Contribute

go-libp2p is part of The IPFS Project, and is MIT-licensed open source software. We welcome contributions big and small! Take a look at the community contributing notes. Please make sure to check the issues. Search the closed ones before reporting things, and help us with the open ones.

Guidelines:

• read the libp2p spec
• ask questions or talk about things in our discussion forums, or open an issue for bug reports, or #libp2p on freenode.
• ensure you are able to contribute (no legal issues please -- we use the DCO)
• get in touch with @marten-seemann about how best to contribute
• have fun!

There's a few things you can do right now to help out:

• Go through the modules below and check out existing issues. This would be especially useful for modules in active development. Some knowledge of IPFS/libp2p may be required, as well as the infrasture behind it - for instance, you may need to read up on p2p and more complex operations like muxing to be able to help technically.
• Perform code reviews.
• Add tests. There can never be enough tests.

Supported Go Versions

We test against and support the two most recent major releases of Go. This is informed by Go's own security policy.