/**
 * Generates a random RFC 4122 version 4 UUID.
 * The UUID is generated using a cryptographic pseudorandom number generator.
 */
export declare function generateUUID(): string;
/**
 * Generates a UUID-style ID.
 * @deprecated Use `generateUUID` instead.
 */
export declare function generateId(): string;
/** Default length if ID produced by `generateShortId`. */
export declare const DEFAULT_SHORT_ID_LENGTH = 18;
/**
 * Generates an ID of the given `length` using lowercase latin letters and digits.
 * If the 'prefix' provided replaces the first generated characters with the prefix.
 * If the 'prefixToAvoid' provided, ensures the generated ID does not start with this prefix.
 * When both 'prefix' and 'prefixToAvoid' are provided, 'prefixToAvoid' must be longer than 'prefix'.
 */
export declare function generateShortId(length?: number, prefix?: string, prefixToAvoid?: string): string;
/**
 * Generates a set of unique IDs under the same behavior as `generateShortId`.
 *
 * @param length The length of the ID to be generated. Default is 18.
 * @param prefix The prefix of the generated ID. Default is an empty string.
 * @param count The number of IDs to be generated.
 */
export declare function generateShortIds({ count, length, prefix }: GenerateShortIdsOptions): string[];
/**
 * Options for generating multiple short IDs.
 */
export interface GenerateShortIdsOptions {
    /** The number of IDs to generate. */
    count: number;
    /**
     * The length of each generated ID.
     * @default DEFAULT_SHORT_ID_LENGTH.
     */
    length?: number;
    /**
     * A string that must be a predefined prefix for each ID. Replaces the first generated characters.
     * @default - no prefix.
     */
    prefix?: string;
}