/**
 * Checks account id check sum
 *
 * @throws InvalidAccountIDError
 */
export declare const checkAccountId: (accountId: string) => void;
/**
 * Checks if a given string (or undefined) is a valid ICP account identifier.
 *
 * It uses the `checkAccountId` function to validate the checksum, but it does not throw an error.
 *
 * @param {string | undefined} address The putative ICP account identifier.
 */
export declare const isIcpAccountIdentifier: (address: string | undefined) => boolean;