export declare const DEFAULT_XO_SALT = "cash.xo.default_salt_for_encryption_aabbccddeeff00112233445566778899";
export type EncrypterOpts = {
    algorithm: string;
    keyLength: number;
    salt: Uint8Array;
    ivLength: number;
    iterations: number;
};
export declare class Encrypter {
    private key;
    opts: EncrypterOpts;
    constructor(key: CryptoKey, opts: EncrypterOpts);
    static fromBytes(key: Uint8Array, opts?: Partial<EncrypterOpts>): Promise<Encrypter>;
    static fromPassphrase(passphrase: string, opts?: Partial<EncrypterOpts>): Promise<Encrypter>;
    encrypt(payload: Uint8Array | string): Promise<Uint8Array>;
    decrypt(payload: Uint8Array | string): Promise<Uint8Array>;
}