/** @module checksum */
import { Trytes } from '../../types';
export declare const errors: {
    INVALID_ADDRESS: string;
    INVALID_CHECKSUM: string;
    INVALID_TRYTES: string;
    INVALID_CHECKSUM_LENGTH: string;
};
/**
 * This method takes 81 trytes, which could be an address or a seed, generates the [checksum](https://docs.iota.org/docs/getting-started/0.1/clients/checksums) and appends it to the trytes.
 *
 * To generate a checksum that is less than 9 trytes long, make sure to set the `isAddress` argument to false.
 *
 * ## Related methods
 *
 * To generate an address, use the [`getNewAddress()`]{@link #module_core.getNewAddress} method.
 *
 * @method addChecksum
 *
 * @summary Generates a checksum and appends it to the given trytes.
 *
 * @memberof module:checksum
 *
 * @param {string} input - 81 trytes to which to append the checksum
 *
 * @param {number} [checksumLength=9] - Length of the checksum to generate
 *
 * @param {boolean} [isAddress=true] - Whether the input is an address
 *
 * @example
 * ```js
 * let addressWithChecksum = Checksum.addChecksum('ADDRESS...');
 * ```
 *
 * @returns {string} The original trytes with an appended checksum.
 *
 * @throws {errors.INVALID_ADDRESS}: Make sure that the given address is 90 trytes long.
 * @throws {errors.INVALID_TRYTES}: Make sure that the `input` argument contains only [trytes](https://docs.iota.org/docs/getting-started/0.1/introduction/ternary)
 * @throws {errors.INVALID_CHECKSUM_LENGTH}: Make sure that the `checksumLength` argument is a number greater than or equal to 3. If the `isAddress` argument is set to true, make sure that the `checksumLength` argument is 9.
 */
export declare function addChecksum(input: Trytes, checksumLength?: number, isAddress?: boolean): Trytes;
/**
 * This method takes an address of 90 trytes, and removes the last 9 trytes to return the address without a checksum.
 *
 * ## Related methods
 *
 * To generate an address, use the [`getNewAddress()`]{@link #module_core.getNewAddress} method.
 * To add a checksum to an address, use the [`addChecksum()`]{@link #module_checksum.addChecksum} method.
 *
 * @method removeChecksum
 *
 * @summary Removes the checksum from the given address.
 *
 * @memberof module:checksum
 *
 * @param {string} input - Address from which to remove the checksum
 *
 * @example
 * ```js
 * let addressWithoutChecksum = Checksum.removeChecksum('ADDRESS...');
 * ```
 *
 * @returns {string} The original address without the appended checksum.
 *
 * @throws {errors.INVALID_ADDRESS}: Make sure that the given address is 90 trytes long.
 */
export declare function removeChecksum(input: Trytes): Trytes;
/**
 * This method takes an address of 90 trytes, and checks if the checksum is valid.
 *
 * ## Related methods
 *
 * To generate an address, use the [`getNewAddress()`]{@link #module_core.getNewAddress} method.
 * To add a checksum to an address, use the [`addChecksum()`]{@link #module_checksum.addChecksum} method.
 *
 * @method isValidChecksum
 *
 * @summary Validates the checksum of an address.
 *
 * @memberof module:checksum
 *
 * @param {string} addressWithChecksum - Address with a checksum
 *
 * @example
 * ```js
 * let valid = Checksum.isValidChecksum('ADDRESS...');
 * ```
 *
 * @returns {boolean} Whether the checksum is valid.
 *
 * @throws {errors.INVALID_ADDRESS}: Make sure that the given address is 90 trytes long.
 */
export declare const isValidChecksum: (addressWithChecksum: string) => boolean;