# Polkadot Implementation of a https://polkadot.network node in Rust based on the Substrate framework. > **NOTE:** In 2018, we split our implementation of "Polkadot" from its development framework > "Substrate". See the [Substrate][substrate-repo] repo for git history prior to 2018. [substrate-repo]: https://github.com/paritytech/substrate This repo contains runtimes for the Polkadot, Kusama, and Westend networks. The README provides information about installing the `polkadot` binary and developing on the codebase. For more specific guides, like how to be a validator, see the [Polkadot Wiki](https://wiki.polkadot.network/docs/en/). ## Installation If you just wish to run a Polkadot node without compiling it yourself, you may either run the latest binary from our [releases](https://github.com/paritytech/polkadot/releases) page, or install Polkadot from one of our package repositories. Installation from the debian or rpm repositories will create a `systemd` service that can be used to run a Polkadot node. This is disabled by default, and can be started by running `systemctl start polkadot` on demand (use `systemctl enable polkadot` to make it auto-start after reboot). By default, it will run as the `polkadot` user. Command-line flags passed to the binary can be customised by editing `/etc/default/polkadot`. This file will not be overwritten on updating polkadot. You may also just run the node directly from the command-line. ### Debian-based (Debian, Ubuntu) Currently supports Debian 10 (Buster) and Ubuntu 20.04 (Focal), and derivatives. Run the following commands as the `root` user. ``` # Import the security@parity.io GPG key gpg --recv-keys --keyserver hkps://keys.mailvelope.com 9D4B2B6EB8F97156D19669A9FF0812D491B96798 gpg --export 9D4B2B6EB8F97156D19669A9FF0812D491B96798 > /usr/share/keyrings/parity.gpg # Add the Parity repository and update the package index echo 'deb [signed-by=/usr/share/keyrings/parity.gpg] https://releases.parity.io/deb release main' > /etc/apt/sources.list.d/parity.list apt update # Install polkadot apt install polkadot ``` ### RPM-based (Fedora, CentOS) Currently supports Fedora 32 and CentOS 8, and derivatives. ``` # Install dnf-plugins-core (This might already be installed) dnf install dnf-plugins-core # Add the repository and enable it dnf config-manager --add-repo https://releases.parity.io/rpm/polkadot.repo dnf config-manager --set-enabled polkadot # Install polkadot (You may have to confirm the import of the GPG key, which # should have the following fingerprint: 9D4B2B6EB8F97156D19669A9FF0812D491B96798) dnf install polkadot ``` ## Building ### Install via Cargo If you want to install Polkadot in your PATH, you can do so with with: ```bash cargo install --git https://github.com/paritytech/polkadot --tag polkadot ``` ### Build from Source If you'd like to build from source, first install Rust. You may need to add Cargo's bin directory to your PATH environment variable. Restarting your computer will do this for you automatically. ```bash curl https://sh.rustup.rs -sSf | sh ``` If you already have Rust installed, make sure you're using the latest version by running: ```bash rustup update ``` Once done, finish installing the support software: ```bash sudo apt install build-essential git clang libclang-dev pkg-config libssl-dev ``` Build the client by cloning this repository and running the following commands from the root directory of the repo: ```bash git checkout ./scripts/init.sh cargo build --release ``` ## Networks This repo supports runtimes for Polkadot, Kusama, and Westend. ### Connect to Polkadot Mainnet Connect to the global Polkadot Mainnet network by running: ```bash ./target/release/polkadot --chain=polkadot ``` You can see your node on [telemetry] (set a custom name with `--name "my custom name"`). [telemetry]: https://telemetry.polkadot.io/#list/Polkadot ### Connect to the "Kusama" Canary Network Connect to the global Kusama canary network by running: ```bash ./target/release/polkadot --chain=kusama ``` You can see your node on [telemetry] (set a custom name with `--name "my custom name"`). [telemetry]: https://telemetry.polkadot.io/#list/Kusama ### Connect to the Westend Testnet Connect to the global Westend testnet by running: ```bash ./target/release/polkadot --chain=westend ``` You can see your node on [telemetry] (set a custom name with `--name "my custom name"`). [telemetry]: https://telemetry.polkadot.io/#list/Westend ### Obtaining DOTs If you want to do anything on Polkadot, Kusama, or Westend, then you'll need to get an account and some DOT, KSM, or WND tokens, respectively. See the [claims instructions](https://claims.polkadot.network/) for Polkadot if you have DOTs to claim. For Westend's WND tokens, see the faucet [instructions](https://wiki.polkadot.network/docs/en/learn-DOT#getting-westies) on the Wiki. ## Hacking on Polkadot If you'd actually like hack on Polkadot, you can grab the source code and build it. Ensure you have Rust and the support software installed. This script will install or update Rust and install the required dependencies (this may take up to 30 minutes on Mac machines): ```bash curl https://getsubstrate.io -sSf | bash -s -- --fast ``` Then, grab the Polkadot source code: ```bash git clone https://github.com/paritytech/polkadot.git cd polkadot ``` Then build the code. You will need to build in release mode (`--release`) to start a network. Only use debug mode for development (faster compile times for development and testing). ```bash ./scripts/init.sh # Install WebAssembly. Update Rust cargo build # Builds all native code ``` You can run the tests if you like: ```bash cargo test --all ``` You can start a development chain with: ```bash cargo run -- --dev ``` Detailed logs may be shown by running the node with the following environment variables set: ```bash RUST_LOG=debug RUST_BACKTRACE=1 cargo run -- --dev ``` ### Development You can run a simple single-node development "network" on your machine by running: ```bash polkadot --dev ``` You can muck around by heading to https://polkadot.js.org/apps and choose "Local Node" from the Settings menu. ### Local Two-node Testnet If you want to see the multi-node consensus algorithm in action locally, then you can create a local testnet. You'll need two terminals open. In one, run: ```bash polkadot --chain=polkadot-local --alice -d /tmp/alice ``` And in the other, run: ```bash polkadot --chain=polkadot-local --bob -d /tmp/bob --port 30334 --bootnodes '/ip4/127.0.0.1/tcp/30333/p2p/ALICE_BOOTNODE_ID_HERE' ``` Ensure you replace `ALICE_BOOTNODE_ID_HERE` with the node ID from the output of the first terminal. ### Using Docker [Using Docker](doc/docker.md) ### Shell Completion [Shell Completion](doc/shell-completion.md) ## Contributing ### Contributing Guidelines [Contribution Guidelines](CONTRIBUTING.md) ### Contributor Code of Conduct [Code of Conduct](CODE_OF_CONDUCT.md) ## License Polkadot is [GPL 3.0 licensed](LICENSE). ## Important Notice https://polkadot.network/testnetdisclaimer