Lightning is the open-source Rust implementation of Fleek Network.

Lightning - Fleek Network Node

This repository contains the source code for the implementation of Fleek Network.

Here is the directory schema:

lightning
├── lib
│   ├── affair
│   ├── atomo
│   ├── blake3-stream
│   ├── blake3-tree
│   ├── fleek-crypto
│   ├── hp-fixed
│   ├── ink-quill
│   ├── sdk
│   ├── sdk-macros
│   └── simulon
├── core
│   ├── application
│   ├── blockstore
│   ├── consensus
│   ├── handshake
│   ├── interfaces
│   ├── mock
│   ├── node
│   ├── notifier
│   ├── origin-arweave
│   ├── origin-filecoin
│   ├── origin-ipfs
│   ├── pod
│   ├── rep-collector
│   ├── reputation
│   ├── rpc
│   ├── signer
│   ├── table
│   ├── test-utils
│   └── topology
└── services
    └── cdn

There are 3 top level directories lib & core and services:

1. lib: Any open source libraries we create to solve our own problems, these libraries are released with the friendly licenses with the Rust ecosystem (MIT | Apache).

2. core: This is all of the implementation of the core protocol, the main crate is node which contains our most important and released main.rs. Another important crate that is advised to everyone to get familiar with is interfaces which contains the top-down specification of all of the project.

3. services: Our services which we build using the SDK.

Interfaces

The design pattern adopted for this software is highly inspired by the Object-Oriented model described by Alan Kay, which may be a bit different from OOP that grew to fame due to Java.

In a nutshell this is similar to the same idea, and we represent different units of computation and process as objects that communicate with each other by message passing.

Rust Version

To get the best of the ecosystem by default the nightly version of Rust is set in the rust-toolchain file, the version in use is nightly-2023-07-01, which is the version used by the rustfmt project itself which is a good sign of reliability.

This is set so that the default that the IDEs will pick and default invocation of cargo fmt is consistent between everyone and also we get to use some of the nightly options when it comes to clippy and fmt.

But this does not mean we're going to use this for building and releasing the binary, building the binary for any actual use cases should use the cargo +stable build command and the coming scripts and CI config will ease this process. Our MSRV (Minimum Supported Rust Version) is 1.75.

So in summary: We use the default that is set in the rust-toolchain to have consistent formatting of the code. And does not necessarily indicate that it is the version of the compiler we are going to use for builds, which should be rust stable and at a minimum version 1.75.

Development

To run the node and perform a simple healthcheck, do the following:

# Start the node up
$ cargo run -r -- run

# In another terminal, send a request to the ping rpc endpoint
$ curl -X POST -H "Content-Type: application/json" -d '{
      "jsonrpc": "2.0",
      "method": "flk_ping",
      "params": [],
      "id": 1
    }' http://127.0.0.1:4069/rpc/v0
# Response: {"jsonrpc":"2.0","result":"pong","id":1}

Nix

The project provides a nix flake for a determanistic development and build environment.

Nix (with flakes enabled) can be easily installed with https://github.com/DeterminateSystems/nix-installer

curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install

Development shell

A development environment can be used with:

nix develop github:fleek-network/lightning

# For a local repo
nix develop .

Build

The project can be built in a pure offline environment with:

nix build github:fleek-network/lightning

# For a local repo
nix build .

Shell environment

A shell can also be spawned with the lightning-node binary provided in the path:

Note: until we provide a cachix cache from ci, the node will be built locally before entering the shell

nix shell github:fleek-network/lightning

# For a local repo
nix shell .

The binary can also be ran directly:

nix run github:fleek-network/lightning -- run -v

# For a local repo
nix run . -- run -v