perry/example-code/blockchain-demo/test_callback19.ts at main · yumin-chen/perry · GitHub

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import { EventEmitter } from 'events';

interface ProcessedEvent {
  network: string;
}

class Inner extends EventEmitter {
  private network: string;

  constructor(network: string) {
    super();
    this.network = network;
  }

  public connect(): void {
    const event: ProcessedEvent = {
      network: this.network
    };
    this.emit('event', event);
  }
}

class Outer extends EventEmitter {
  public initialize(): void {
    const networks = ['ethereum'];

    networks.map((network) => {
      const connection = new Inner(network);

      connection.on('event', (event) => {
        this.emit('event', event);
      });

      connection.connect();
    });
  }
}

const outer = new Outer();
outer.initialize();
console.log("Test");