import { Global, Module } from '@nestjs/common';
import { CryptoService } from './crypto.service';

/**
 * CryptoModule — the platform's single AES-256-GCM provider for credentials
 * that have to be replayed against a third party and therefore cannot be
 * hashed.
 *
 * Global on purpose. Before this module existed the provider lived in
 * CalendarModule, so SettingsModule, DkvModule, TendersModule and LdapModule
 * each imported CalendarModule just to reach it — an import that suggested a
 * dependency on calendars where there was none. Making it global removes that
 * false coupling instead of moving it to a different host module.
 */
@Global()
@Module({
  providers: [CryptoService],
  exports: [CryptoService],
})
export class CryptoModule {}