EthModule with web3 provider

eth.module.ts

import { NgModule, ModuleWithProviders, Type } from '@angular/core';
import { CommonModule } from '@angular/common';
// Web3
import { WEB3 } from './tokens';
const Web3 = require('web3');

// Services
import { AccountsService } from './eth.services';

@NgModule({
 imports: [CommonModule],
 declarations: [],
 providers: [ AccountsService , {
         provide: WEB3,
         useFactory: (provider: any) => new Web3(Web3.givenProvider || "ws://localhost:8546"),
  }]
})
export class EthereumModule {}