Small proof-of-concept to show sponsored transactions in Substrate.

Use the following command to build the node without launching it:

cargo build --release

After you build the project, you can use the following command to explore its parameters and subcommands:

./target/release/spontra -h

You can generate and view the Rust Docs for this template with this command:

cargo +nightly doc --open

The following command starts a single-node development chain that doesn't persist state:

./target/release/spontra --dev

To purge the development chain's state, run the following command:

./target/release/spontra purge-chain --dev

To start the development chain with detailed logging, run the following command:

RUST_BACKTRACE=1 ./target/release/spontra -ldebug --dev

Development chains:

• Maintain state in a tmp folder while the node is running.
• Use the Alice and Bob accounts as default validator authorities.
• Use the Alice account as the default sudo account.
• Are preconfigured with a genesis state (/node/src/chain_spec.rs) that includes several prefunded development accounts.

To persist chain state between runs, specify a base path by running a command similar to the following:

// Create a folder to use as the db base path
$ mkdir my-chain-state

// Use of that folder to store the chain state
$ ./target/release/spontra --dev --base-path ./my-chain-state/

// Check the folder structure created inside the base path after running the chain
$ ls ./my-chain-state
chains
$ ls ./my-chain-state/chains/
dev
$ ls ./my-chain-state/chains/dev
db keystore network

After you start the node template locally, you can interact with it using the hosted version of the Polkadot/Substrate Portal front-end by connecting to the local node endpoint. A hosted version is also available on IPFS (redirect) here or IPNS (direct) here. You can also find the source code and instructions for hosting your own instance on the polkadot-js/apps repository.

If you want to see the multi-node consensus algorithm in action, see Simulate a network.

Please follow the Substrate Docker instructions here to build the Docker container with the Substrate Node Template binary.