declare class AlipayCrypto<T extends Options = Options> {
  defaults: PickPartial<OauthCommonOptions, 'app_id' | 'sign' | 'timestamp'>
  options: T
  constructor(options: T)
  serializedParams(data: SignOptions, encrypt?: boolean): string
  encrypt(initial: string, privateKey?: string): string
  encrypt<T extends SignOptions = SignOptions>(initial: T, privateKey?: string): string
  md5<T extends Record<string, unknown> = Record<string, unknown>>(data: string | T): string
}
export default AlipayCrypto

export declare interface OauthCodeOptions {
  grant_type: 'authorization_code'
  code: string
}

export declare interface OauthCommonOptions {
  app_id: string
  method: 'alipay.system.oauth.token'
  format?: 'JSON'
  charset: 'utf-8' | 'gbk' | 'gb2312'
  sign_type: 'RSA' | 'RSA2'
  sign: string
  timestamp: string
  version: '1.0' | string
  app_auth_token?: string
}

export declare type OauthOptions = OauthCodeOptions | OauthRefreshOptions

export declare interface OauthRefreshOptions {
  grant_type: 'refresh_token'
  refresh_token: string
}

export declare type PickPartial<T, K extends keyof T> = {
  [P in K]?: T[P]
} & Omit<T, K>

export declare type SerializeParams = Omit<Required<SignOptions>, 'sign'>

export declare interface SignOptions extends OauthCommonOptions {
  biz_content?: string
}