declare class ConfigManager {
    #private;
    /**
     * The number of hashing rounds to use for password hashing.
     * This value is read from the `AuthCrypto_ROUNDS` environment variable.
     * If the value is not a valid number or is less than one, a `SyntaxError` will be thrown.
     * If the value is not set, `undefined` will be returned.
     * @returns {number | undefined} The number of hashing rounds to use.
     */
    get hashingRounds(): number | undefined;
    /**
     * Sets the number of hashing rounds for AuthCrypto. This value must be a positive integer of at least 1.
     * @throws {TypeError} If the number of rounds is not a valid number.
     * @throws {RangeError} If the number of rounds is less than 1.
     * @param {number} r The number of hashing rounds to set.
     */
    set hashingRounds(r: number);
    /**
     * The minimum length of a password for AuthCrypto.
     * This value is read from the `AuthCrypto_PASSWORDS_MIN` environment variable.
     * If the value is not a valid number or is less than 8, a `SyntaxError` or `RangeError` will be thrown.
     * If the value is not set, `undefined` will be returned.
     * @returns {number | undefined} The minimum length of a password.
     */
    get minPasswordLength(): number | undefined;
    /**
     * Sets the minimum length of a password for AuthCrypto. This value must be a positive integer of at least 8.
     * @throws {TypeError} If the min password length is not a valid number.
     * @throws {RangeError} If the min password length is less than 8.
     * @param {number} min The minimum length of a password to set.
     */
    set minPasswordLength(min: number);
    /**
     * The maximum length of a password for AuthCrypto.
     * This value is read from the `AuthCrypto_PASSWORDS_MAX` environment variable.
     * If the value is not a valid number or is greater than 32, a `SyntaxError` or `RangeError` will be thrown.
     * If the value is not set, `undefined` will be returned.
     * @returns {number | undefined} The maximum length of a password.
     */
    get maxPasswordLength(): number | undefined;
    /**
     * Sets the maximum length of a password for AuthCrypto. This value must be a positive integer of at most 32.
     * @throws {TypeError} If the max password length is not a valid number.
     * @throws {RangeError} If the max password length is greater than 32.
     * @param {number} max The maximum length of a password to set.
     */
    set maxPasswordLength(max: number);
    /**
     * Returns the secret key used to sign and verify JSON Web Tokens.
     * This value is read from the `AuthCrypto_JWT_SECRET` environment variable.
     * If the value is not a valid string or is not at least 64 bytes long for HS512, a `TypeError` will be thrown.
     * If the value is not set, `undefined` will be returned.
     * @returns {string | undefined} The secret key used for JWT signing and verification.
     */
    get jwtSecret(): string | undefined;
    /**
     * Sets the secret key used to sign and verify JSON Web Tokens.
     * This value must be a string and at least 64 bytes long for HS512.
     * @throws {TypeError} If the JWT secret is not a string.
     * @throws {Error} If the JWT secret is less than 64 bytes long.
     * @param {string} secret The secret key used to sign and verify JSON Web Tokens.
     */
    set jwtSecret(secret: string);
    /**
     * Sets the configuration options for AuthCrypto.
     * @param {Configs} configs An object with the configuration options.
     * @throws {TypeError} If the config is not an object.
     * @throws {Error} If any of the required properties are missing from the config object.
     */
    set(configs: Configs): void;
}
interface Configs {
    minPasswordLength: number;
    maxPasswordLength: number;
    jwtSecret: string;
    hashingRounds: number;
}
export default ConfigManager;