watcher-ts/packages/lighthouse-watcher/src/client.ts

//
// Copyright 2021 Vulcanize, Inc.
//

import { gql } from '@apollo/client/core';
import { GraphQLClient, GraphQLConfig } from '@vulcanize/ipld-eth-client';

import { subscribeEvents } from './queries';

export class Client {
  _config: GraphQLConfig;
  _client: GraphQLClient;

  constructor (config: GraphQLConfig) {
    this._config = config;

    this._client = new GraphQLClient(config);
  }

  async watchEvents (onNext: (value: any) => void): Promise<ZenObservable.Subscription> {
    return this._client.subscribe(
      gql(subscribeEvents),
      ({ data }) => {
        onNext(data.onEvent);
      }
    );
  }
}