Sway Playground

Sway Playground enables developers to build simple sway contracts in the browser with no installation of tools. This tool is inspired by the Ethereum remix tool or the Rust Playground.

Try it Now!

sway-playground.org

How it Works

Sway Playground has a simple multi-threaded Rocket backend server which creates a temp project per compile request, builds the project, removes the temp files and returns the output.

The frontend uses React and typescript with Ace editor.

Sway Documentation

For user documentation, including installing release builds, see the Sway Book: https://fuellabs.github.io/sway/latest/.

Building from Source

This section is for developing the Sway Playground. For developing contracts and using Sway, see the above documentation section.

Dependencies

Sway Playground is built in Rust and Javascript. To begin, install the Rust toolchain following instructions at https://www.rust-lang.org/tools/install. Then configure your Rust toolchain to use Rust stable:

rustup default stable

If not already done, add the Cargo bin directory to your PATH by adding the following line to ~/.profile and restarting the shell session.

export PATH="${HOME}/.cargo/bin:${PATH}"

Building Sway Playground

Clone the repository and build the Sway toolchain:

git clone git@github.com:FuelLabs/sway-playground.git
cd sway-playground
cargo build

Confirm the Sway Playground built successfully:

cargo run --bin sway-playground

Running the Sway Compiler Server

The server is a simple Hyper server for now.

cargo run

Alternatively, it can be run locally with Docker, as it is in the deployed environment.

# forc is not fully supported on arm linux, see https://github.com/FuelLabs/sway/issues/5760
docker buildx build --platform linux/amd64 -f deployment/Dockerfile .
docker run -p 8080:8080 -d <image-sha>

Running the Frontend

The frontend is just a simple static frontend and can be hosted anywhere.

cd app
npm start

This will open http://localhost:3000 in your browser. By default, it will use the production backend endpoint.

To test against the backend running locally, you can use the environment variable REACT_APP_LOCAL_SERVER when you start the app, like this:

REACT_APP_LOCAL_SERVER=true npm start

Contributing to Sway

We welcome contributions to Sway Playground, for general contributing guidelines please consult the Sway Contributing Documentation for now.

Please see the Contributing To Sway section of the Sway book for guidelines and instructions to help you get started.

Todo

• UI design in line with other Fuel apps.
• Ace Editor support for Sway syntax highlighting.
• Ensuring IO non-blocking (not sure if the server is truly non-blocking and multi-threaded), might need tokio IO.
• Better CI to always make available the latest stable version of Sway.
• Support for deploying and testing contracts.
• React unit tests.