SOURCE

interface myService {
  getIndexInfo(obj: {
    name: string,
    id: string
  }) : Promise < any >
}
class IndexService implements myService {
  async getIndexInfo(obj: {
    name: string,
    id: string
  }) : Promise < any > {
    return new Promise((resolve, reject) => {
      resolve(obj);
    });
  }
}

let service = new IndexService();
async function getResult() {
  let result = await service.getIndexInfo({
    name: 'xiaoming',
    id: 'ssss'
  });
  console.log(result);
}