A module to provide the URI of an Ethereum node

provider.module.ts

import { NgModule, ModuleWithProviders, InjectionToken} from '@angular/core';

export const URL = new InjectionToken<string>('url');
@NgModule({
  imports: [HttpClientModule]
})
export class ProviderModule {
  static init(url: string): ModuleWithProviders {
    return {
      ngModule: ProviderModule,
      providers: [{ provide: URL, useValue: url }]
    };
  };
}