metamask-extension/shared/constants/keyring.ts

import { HardwareKeyringType } from './hardware-wallets';

/**
 * These are the keyrings that are managed entirely by MetaMask.
 */
export enum InternalKeyringType {
  hdKeyTree = 'HD Key Tree',
  imported = 'Simple Key Pair',
}

/**
 * All keyrings supported by MetaMask.
 */
export const KeyringType = {
  ...HardwareKeyringType,
  ...InternalKeyringType,
};