nim-libp2p/README.md

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<h1 align="center">
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<a href="https://libp2p.io"><img width="250" src="./.assets/full-logo.svg?raw=true" alt="nim-libp2p logo" /></a>
</h1>
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<h3 align="center">The Nim implementation of the libp2p Networking Stack.</h3>
<p align="center">
<a href="https://github.com/status-im/nim-libp2p/actions"><img src="https://github.com/status-im/nim-libp2p/actions/workflows/ci.yml/badge.svg" /></a>
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<a href="https://opensource.org/licenses/Apache-2.0"><img src="https://img.shields.io/badge/License-Apache%202.0-blue.svg" /></a>
<a href="https://opensource.org/licenses/MIT"><img src="https://img.shields.io/badge/License-MIT-blue.svg" /></a>
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</p>
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## Introduction
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An implementation of [libp2p](https://libp2p.io/) in [Nim](https://nim-lang.org/).
# Table of Contents
- [Background](#background)
- [Install](#install)
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- [Getting Started](#getting-started)
- [Modules](#modules)
- [Users](#users)
- [Development](#development)
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- [Contribute](#contribute)
- [Core Developers](#core-developers)
- [License](#license)
## Background
libp2p is a networking stack and library modularized out of [The IPFS Project](https://github.com/ipfs/ipfs), 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 the 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 suite of networking protocols 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.
- Learn more about libp2p at [**libp2p.io**](https://libp2p.io) and follow our evolving documentation efforts at [**docs.libp2p.io**](https://docs.libp2p.io).
- [Here](https://github.com/libp2p/libp2p#description) is an overview of libp2p and its implementations in other programming languages.
## Install
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**Prerequisite**
- [Nim](https://nim-lang.org/install.html)
```
nimble install libp2p
```
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## Getting Started
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You'll find the documentation [here].(https://status-im.github.io/nim-libp2p/docs/)
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**Go Daemon:**
Please find the installation and usage intructions in [daemonapi.md](examples/go-daemon/daemonapi.md).
## Modules
List of packages modules implemented in nim-libp2p:
| Name | Description |
| ---------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| **Libp2p** | |
| [libp2p](libp2p/switch.nim) | The core of the project |
| [connmanager](libp2p/connmanager.nim) | Connection manager |
| [identify / push identify](libp2p/protocols/identify.nim) | [Identify](https://docs.libp2p.io/concepts/protocols/#identify) protocol |
| [ping](libp2p/protocols/ping.nim) | [Ping](https://docs.libp2p.io/concepts/protocols/#ping) protocol |
| [libp2p-daemon-client](libp2p/daemon/daemonapi.nim) | [go-daemon](https://github.com/libp2p/go-libp2p-daemon) nim wrapper |
| [interop-libp2p](tests/testinterop.nim) | Interop tests |
| **Transports** | |
| [libp2p-tcp](libp2p/transports/tcptransport.nim) | TCP transport |
| [libp2p-ws](libp2p/transports/wstransport.nim) | WebSocket & WebSocket Secure transport |
| **Secure Channels** | |
| [libp2p-secio](libp2p/protocols/secure/secio.nim) | [Secio](https://docs.libp2p.io/concepts/protocols/#secio) secure channel |
| [libp2p-noise](libp2p/protocols/secure/noise.nim) | [Noise](https://github.com/libp2p/specs/tree/master/noise) secure channel |
| [libp2p-plaintext](libp2p/protocols/secure/plaintext.nim) | [Plain Text](https://github.com/libp2p/specs/tree/master/plaintext) for development purposes |
| **Stream Multiplexers** | |
| [libp2p-mplex](libp2p/muxers/mplex/mplex.nim) | [MPlex](https://github.com/libp2p/specs/tree/master/mplex) multiplexer |
| **Data Types** | |
| [peer-id](libp2p/peerid.nim) | [Cryptographic identifiers](https://docs.libp2p.io/concepts/peer-id/) |
| [peer-store](libp2p/peerstore.nim) | ["Phone book" of known peers](https://docs.libp2p.io/concepts/peer-id/#peerinfo) |
| [multiaddress](libp2p/multiaddress.nim) | [Composable network addresses](https://github.com/multiformats/multiaddr) |
| [signed envelope](libp2p/signed_envelope.nim) | [Signed generic data container](https://github.com/libp2p/specs/blob/master/RFC/0002-signed-envelopes.md) |
| [routing record](libp2p/routing_record.nim) | [Signed peer dialing informations](https://github.com/libp2p/specs/blob/master/RFC/0003-routing-records.md) |
| **Utilities** | |
| [libp2p-crypto](libp2p/crypto) | Cryptographic backend |
| [libp2p-crypto-secp256k1](libp2p/crypto/secp.nim) | |
| **Pubsub** | |
| [libp2p-pubsub](libp2p/protocols/pubsub/pubsub.nim) | Pub-Sub generic interface |
| [libp2p-floodsub](libp2p/protocols/pubsub/floodsub.nim) | FloodSub implementation |
| [libp2p-gossipsub](libp2p/protocols/pubsub/gossipsub.nim) | [GossipSub](https://docs.libp2p.io/concepts/publish-subscribe/) implementation |
## Users
nim-libp2p is used by:
- [Nimbus](https://github.com/status-im/nimbus-eth2), an Ethereum client
- [nwaku](https://github.com/status-im/nwaku), a decentralized messaging application
- [nim-codex](https://github.com/status-im/nim-codex), a decentralized storage application
- (open a pull request if you want to be included here)
## Development
**Clone and Install dependencies:**
```sh
git clone https://github.com/status-im/nim-libp2p
cd nim-libp2p
nimble install
```
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**Run unit tests**
```sh
# run all the unit tests
nimble test
```
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### Contribute
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The libp2p implementation in Nim is a work in progress. We welcome contributors to help out! Specifically, you can:
- Go through the modules 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 infrastructure behind it.
- **Perform code reviews**. Feel free to let us know if you found anything that can a) speed up the project development b) ensure better quality and c) reduce possible future bugs.
- **Add tests**. Help nim-libp2p to be more robust by adding more tests to the [tests folder](tests/).
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The code follows the [Status Nim Style Guide](https://status-im.github.io/nim-style-guide/).
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### Core Developers
[@cheatfate](https://github.com/cheatfate), [Dmitriy Ryajov](https://github.com/dryajov), [Tanguy](https://github.com/Menduist), [Zahary Karadjov](https://github.com/zah)
### Tips and tricks
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**enable expensive metrics:**
```bash
nim c -d:libp2p_expensive_metrics some_file.nim
```
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**use identify metrics**
add metrics into chronosstream to identify peers agents (#458) * add metrics into chronosstream to identify peers agents * avoid too many agent strings * use gauge instead of counter for stream metrics * filter identity on / * also track bytes traffic * fix identity tracking closeimpl call * add gossip rpc metrics * fix missing metrics inclusions * metrics fixes and additions * add a KnownLibP2PAgents strdefine * enforse toLowerAscii to agent names (metrics) * incoming rpc metrics * fix silly mistake in rpc metrics * fix agent metrics logic * libp2p_gossipsub_failed_publish metric * message ids metrics * libp2p_pubsub_broadcast_ihave metric improvement * refactor expensive gossip metrics * more detailed metrics * metrics improvements * remove generic metrics for `set` users * small fixes, add debug counters * fix counter and add missing subs metrics! * agent metrics behind -d:libp2p_agents_metrics * remove testing related code from this PR * small rebroadcast metric fix * fix small mistake * add some guide to the readme in order to use new metrics * add libp2p_gossipsub_peers_scores metric * add protobuf metrics to understand bytes traffic precisely * refactor gossipsub metrics * remove unused variable * add more metrics, refactor rebalance metrics * avoid bad metric concurrent states * use a stack structure for gossip mesh metrics * refine sub metrics * add received subs metrics fixes * measure handlers of known topics * sub/unsub counter * unsubscribeAll log unknown topics * expose a way to specify known topics at runtime
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```bash
nim c -d:libp2p_agents_metrics -d:KnownLibP2PAgents=nimbus,lighthouse,prysm,teku some_file.nim
```
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**specify gossipsub specific topics to measure**
add metrics into chronosstream to identify peers agents (#458) * add metrics into chronosstream to identify peers agents * avoid too many agent strings * use gauge instead of counter for stream metrics * filter identity on / * also track bytes traffic * fix identity tracking closeimpl call * add gossip rpc metrics * fix missing metrics inclusions * metrics fixes and additions * add a KnownLibP2PAgents strdefine * enforse toLowerAscii to agent names (metrics) * incoming rpc metrics * fix silly mistake in rpc metrics * fix agent metrics logic * libp2p_gossipsub_failed_publish metric * message ids metrics * libp2p_pubsub_broadcast_ihave metric improvement * refactor expensive gossip metrics * more detailed metrics * metrics improvements * remove generic metrics for `set` users * small fixes, add debug counters * fix counter and add missing subs metrics! * agent metrics behind -d:libp2p_agents_metrics * remove testing related code from this PR * small rebroadcast metric fix * fix small mistake * add some guide to the readme in order to use new metrics * add libp2p_gossipsub_peers_scores metric * add protobuf metrics to understand bytes traffic precisely * refactor gossipsub metrics * remove unused variable * add more metrics, refactor rebalance metrics * avoid bad metric concurrent states * use a stack structure for gossip mesh metrics * refine sub metrics * add received subs metrics fixes * measure handlers of known topics * sub/unsub counter * unsubscribeAll log unknown topics * expose a way to specify known topics at runtime
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```bash
nim c -d:KnownLibP2PTopics=topic1,topic2,topic3 some_file.nim
```
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## License
Licensed and distributed under either of
* MIT license: [LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT
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or
* Apache License, Version 2.0, ([LICENSE-APACHEv2](LICENSE-APACHEv2) or http://www.apache.org/licenses/LICENSE-2.0)
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at your option. These files may not be copied, modified, or distributed except according to those terms.