Test code

import { Collection, Filter, FindCursor, MongoClient, OptionalId, WithId } from 'mongodb';
const uri = 'mongodb://127.1:27017/';
const client = new MongoClient(uri);
client.connect();
const db = client.db('SMokeBot');

export class DB {

  collection: Collection<Document>
  constructor(collName: string) {
    this.collection = db.collection(collName);
  }

  async addOne(obj: OptionalId<Document>): Promise<void> {
    await this.collection.insertOne(obj);
  };

  async deleteOne(findParams: Filter<Document>): Promise<void> {
    const find: WithId<Document> = (await this.collection.findOne(findParams))!;
    await this.collection.deleteOne(find);
  };

  async editOne(findParam: Filter<Document>, pValue: any, pName: string): Promise<void>  {
    const user: WithId<Document> | null = await this.collection.findOne(findParam);
    const param = {};
    param[pName] = pValue;
    await this.collection.updateOne({ _id: user!._id }, { $set: param });
  };

  async find(findParams: Filter<Document>): Promise<WithId<Document>> {
    return new Promise(async(resolve: (value: WithId<Document> | PromiseLike<WithId<Document>>) => void , reject: (reason?: any) => void): Promise<void> => {
      const find: WithId<Document> | null = await this.collection.findOne(findParams);
      resolve(JSON.parse(String(find)));
    });
  };

  async getAll(): Promise<WithId<Document>>  {
    return new Promise(async (resolve: (value: WithId<Document> | PromiseLike<WithId<Document>>) => void, reject: (reason?: any) => void): Promise<void> => {
      const cursor: FindCursor<WithId<Document>> = await this.collection.find();
      const find: WithId<Document>[] = await cursor.toArray();
      resolve(JSON.parse(String(find)));
    });
  };
}