export interface ScryptPassParams {
    password: string;
    salt: string;
    dkLen?: number;
}
export interface EncryptParams {
    phrase: string;
    password: string;
    salt?: string;
    nonce?: Uint8Array;
}
export interface EncryptResponse {
    encryptedPhrase: string;
    salt: string;
}
export interface DecryptParams {
    phrase: string;
    password: string;
    salt: string;
}
export declare const RECOVERY_CODE_NBITS = 160;
export declare const RECOVERY_CODE_NWORDS: number;
export declare const SALT_BYTES = 32;
export declare const NONCE_BYTES: number;
export declare const LOCAL_KEY_BYTES: number;
export declare const CRYPTO_V1 = 1;
export declare const CURRENT_CRYPTO_VERSION = 1;
export declare const KEY_LEN: number;
/**
 * Encrypt a phrase using scrypt.
 * @async
 * @param {Object} params Params object
 * @param {string} params.phrase Phrase to be encrypted
 * @param {string} params.password A password to encrypt the string with.
 * @param {string} [params.salt] A static salt. Use only for unit tests.
 * @param {string} [params.nonce] A static nonce. Use only for unit tests.
 */
export declare function encrypt(params: EncryptParams): Promise<EncryptResponse>;
export declare function decrypt(params: DecryptParams): Promise<string>;