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Polkadart

Polkadart API

The Polkadart API is the main package polkadart which provides tools to connect and interact with the Polkadot or Substrate chains. It abstracts the complexities of the network protocols and offers straightforward APIs.

Installation

Add the following to your pubspec.yaml file:

pubspec.yaml
dependencies:
  polkadart: ^0.4.7

Now run:

Terminal window
dart pub get

Usage

demo.dart
import 'dart:typed_data';
import 'package:convert/convert.dart';
import 'package:polkadart/apis/apis.dart';
import 'package:polkadart/polkadart.dart' show Provider, StateApi;


void main() async {
  final polkadart =
      Provider.fromUri(Uri.parse('wss://rpc.matrix.canary.enjin.io'));
  final state = StateApi(polkadart);
  final runtimeVersion = await state.getRuntimeVersion();
  print(runtimeVersion.toJson());


  final author = AuthorApi(polkadart);
  final extrinsic = hex.decode(
      '350284004ea987928399dfe5b94bf7d37995850a21067bfa4549fa83b40250ee635fc06400036990f9642741b00d3484d2e5bd7cba6fa2eea682f6b6c612e47c204f09b0838c171ba42feae5bea1c48a48213cba42a5d590e1c07d1213d263a258f23f5102001c000a07004ea987928399dfe5b94bf7d37995850a21067bfa4549fa83b40250ee635fc064025a6202');


  final submit = await author.submitAndWatchExtrinsic(extrinsic as Uint8List,
      (data) => print('From here: ${data.type} - ${data.value}'));
  print(submit);


    await polkadot.disconnect();
}