Relay Chain Template

Polkadot version v0.9.26 Rust version: 1.64-nightly

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.

curl https://sh.rustup.rs -sSf | sh

If you already have Rust installed, make sure you're using the latest version by running:

rustup update

Once done, finish installing the support software:

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:

./scripts/init.sh
cargo build --release

Note that compilation is a memory intensive process. We recommend having 4 GiB of physical RAM or swap available (keep in mind that if a build hits swap it tends to be very slow).

Hacking on Template

If you'd actually like to hack on Template, you can clone 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):

curl https://getsubstrate.io -sSf | bash -s -- --fast

Then, grab the Relay Template source code:

git clone https://github.com/fennsaji/relay-chain-template.git
cd relay-chain-template

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).

./scripts/init.sh   # Install WebAssembly. Update Rust
cargo build # Builds all native code

You can run the tests if you like:

cargo test --all --release

You can start a development chain with:

cargo run -- --dev

Detailed logs may be shown by running the node with the following environment variables set:

RUST_LOG=debug RUST_BACKTRACE=1 cargo run -- --dev

Development

You can run a simple single-node development "network" on your machine by running:

.target/release/relay-template --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:

.target/release/relay-template --chain=relay-template-local --alice -d /tmp/alice

And in the other, run:

.target/release/relay-template --chain=relay-template-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.

Monitoring

Setup Prometheus and Grafana.

Once you set this up you can take a look at the Grafana dashboards that we currently maintain.