This is the lib used for users who want to connect to the Impetus Substrate chain. Based on @polkadot/typegen to to generate type definitions that can be used to decorate the @polkadot/api. It uses both types defined for the specific chain as well as the chain metadata to generate TypeScript interfaces. This means that interfaces such as api.query., api.tx. and api.consts.* will be decorated based on chain-specific information, instead of an un-augmented catch-all definition.
Install dependencies with npm:
npm install impetus-typegenFor simple usage, we have added the src/index.ts file that show how the metadata and types actually decorate the API. In addition, we also have setup instructions included here.
import 'impetus-typegen';
Then you can query some information from impetus chain, e.g: We can simple index data of first round impetus:
export async function indexRoundInfo(): Promise<void> {
let roundInfo = await api.query.luckyNumber.lottery(0);
const { start, minPrice, rate } = roundInfo.unwrap();
console.log(`Round 0 start at ${start} with min price for buy ${minPrice}. We can easy win with rate ${rate}`);
}
Start your source and enjoy. Just a really simple walk-through to customizing the API TypeScript definitions for impetus chain. Please reach out us at https://github.com/dnt-team/impetus-typegen if you have any question
Generate metadata.json from blockchain: curl -H "Content-Type: application/json" -d '{"id":"1", "jsonrpc":"2.0", "method": "state_getMetadata", "params":[]}' http://localhost:9944