sample provider using config

couchdb.provider.ts

import { FactoryProvider, Logger } from "@nestjs/common";
import {Configuration, DocumentScope} from 'nano'
import nano = require("nano");
import { ConfigType } from "@nestjs/config";
import databaseConfig from "../database.config";
import { User } from "src/user/user";

export const userDocScopeFactory: FactoryProvider = {
    provide: 'UserDocumentScope',
    useFactory: async (dbConfig: ConfigType<typeof databaseConfig>):Promise<DocumentScope<User>> => {
        const log = new Logger('userDocScopeFactory',true);

        const opts: Configuration = {
            url: `http://${dbConfig.url}:${dbConfig.port}`,
            requestDefaults:{
                auth:{
                    pass:dbConfig.password,
                    user:dbConfig.user
                }
            },
            log: (id, args) => {
                log.debug(`ID : ${JSON.stringify(id)} -> args ${args}`)
            },
        }

        return nano(opts).use('_users');
    },
    inject:[databaseConfig.KEY]
}