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Joystream Substrate Runtime
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Latest commit ae76fc4 Apr 28, 2019

Joystream Runtime

Joystream Runtime

The runtime is the code that defines the consensus rules of the Joystream protocol. It is compiled to WASM and lives on chain. Full nodes execute the code's logic to validate transactions and blocks on the blockchain.

The joystream runtime builds on substrate v1.0 and adds additional functionality:


To compile the runtime you will need some tools such as: Rust, llvm and openssl. You can install most of the dependencies with:

curl -sSf | bash

Getting Started - Building the WASM runtime

git clone
cd substrate-runtime-joystream/

This produces the WASM "blob" output in:


See deployment for notes on how to deploy this runtime on a live system.


Deploying the compiled runtime on a live system can be done in one of two ways:

  1. Joystream runtime upgrade proposals which will be voted on by the council. When the Joystream platform is live, this will be the only way to upgrade the chain's runtime code.

  2. During development and testnet phases, we can send an extrinsic (transaction signed with the sudo key) invoking conesnsus::setCode(). This can be done either from the UI/extrinsics app, or directly with an admin script.

Running the tests

cargo test

Coding style

We use rustfmt to format the source code for consistency.

rustfmt can be installed with rustup:

rustup component add rustfmt

Running rustfmt can be applied to all source files recursing subfolders:

rustfmt src/*.*

Built With


Please read for details on our code of conduct, and the process for submitting pull requests to us.


Versioning of the runtime is set in src/ For detailed information about how to set correct version numbers when developing a new runtime, see this


See also the list of contributors who participated in this project.


This project is licensed under the GPLv3 License - see the LICENSE file for details


Thanks to the whole Parity Tech team for making substrate and helping on riot chat with tips, suggestions, tutorials and answering all our questions during development.

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