Note that if you want to run (e.g. for testing) Sway smart contracts, a Fuel Core full node is required. Otherwise, the Sway toolchain is sufficient to compile Sway smart contracts.


A prerequisite for installing and using Sway is the Rust toolchain. Platform-specific instructions can be found here.

Installing fuel-core may require installing additional system dependencies. See here for instructions.

Installing from Cargo

The Sway toolchain and Fuel Core full node can be installed with:

cargo install forc fuel-core

forc and fuel-core are built and tested against the stable Rust toolchain version 1.58 or later. If your install fails the first time, use rustup update and try again.

There is no guarantee that either package will work with the nightly Rust toolchain, so ensure you are using stable with:

rustup default stable

Updating forc

You can update forc and fuel-core with:

cargo install forc fuel-core

Installing forc Plugins

The Fuel ecosystem has a few plugins which can be easily installed via cargo.

Note, forc detects anything in your path prefixed with forc- as a plugin. Use forc plugins to see what you currently have installed.

# Sway Formatter
cargo install forc-fmt

# Block Explorer
cargo install forc-explore

# Forc Language Server
cargo install forc-lsp

Building from Source

The Sway toolchain can be built from source by following instructions at

The Fuel Core full node implementation can be built from source by following instructions at

Enable tab completion for Bash, Fish, Zsh, or PowerShell

forc now supports generating completion scripts for Bash, Fish, Zsh, and PowerShell. See forc completions --help for full details, but the gist is as simple as using one of the following:

# Bash
$ forc completions --shell=bash > ~/.local/share/bash-completion/completions/forc

# Bash (macOS/Homebrew)
$ forc completions --shell=bash > $(brew --prefix)/etc/bash_completion.d/forc.bash-completion

# Fish
$ mkdir -p ~/.config/fish/completions
$ forc completions --shell=fish > ~/.config/fish/completions/

# Zsh
$ forc completions --shell=zsh > ~/.zfunc/_forc

# PowerShell v5.0+
$ forc completions --shell=powershell >> $PROFILE.CurrentUserCurrentHost
# or
$ forc completions --shell=powershell | Out-String | Invoke-Expression

Once the completions have been generated and properly installed, close and reopen your terminal for the new completions to take effect.