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Polkadart

Type generator

Type generation is a crucial part of working with Polkadot and Polkadot based chains. Each network has its own set of types, APIs, extrinsics and Polkadart provides a way to generate these types for you. This makes it easier to work with any chains with the security of type-safety and auto-completion.

Generating types

We will use Polkadart CLI to generate the types for us, add the following configuration at the end of your pubspec file.

pubspec.yaml
polkadart:
  output_dir: lib/generated
  chains:
    polkadot: wss://rpc.polkadot.io
    kusama: wss://kusama-rpc.polkadot.io

Now let’s generate the types:

Terminal window
dart run polkadart_cli:generate -v

You will see that a folder lib/generated was created for you with everything you need to start working with Polkadot and Kusama.