one/src/platform/secure-store/types.ts

One is a React framework for web, iOS, and Android apps.

// expo-secure-store's SecureStoreOptions, with its numeric
// KeychainAccessibilityConstant values as a lowercase string union.
export type SecureStoreAccessibility =
  | 'afterFirstUnlock'
  | 'afterFirstUnlockThisDeviceOnly'
  | 'always'
  | 'alwaysThisDeviceOnly'
  | 'whenPasscodeSetThisDeviceOnly'
  | 'whenUnlocked'
  | 'whenUnlockedThisDeviceOnly'

export interface SecureStoreOptions {
  /**
   * ios: the keychain item's service (kSecAttrService). android: the
   * AndroidKeyStore key alias. an item set with a service is read and
   * deleted with the same service.
   */
  keychainService?: string
  /** ios only: when the item is accessible (kSecAttrAccessible). default 'whenUnlocked' */
  keychainAccessible?: SecureStoreAccessibility
  /**
   * require biometric authentication to read or write the item. ios uses a
   * biometryCurrentSet access control; android uses a user-authentication
   * bound AndroidKeyStore key, invalidated when biometrics change. on
   * android the prompt needs a foreground activity, so the sync verbs throw
   * for an authenticated item instead of prompting.
   */
  requireAuthentication?: boolean
  /** message shown while requireAuthentication prompts */
  authenticationPrompt?: string
  /** ios only: the keychain access group the item belongs to */
  accessGroup?: string
}