import type { UnixUnit } from "../validate/isValidUnixUnit.js";
/**
 * Return whether `value1` and `value2` represent the same instant.
 *
 * - Uses Temporal.Instant.compare to check equality.
 * - Returns false if either input is invalid.
 *
 * @param value1 first unix epoch value
 * @param value2 second unix epoch value
 * @param options epoch unit and options
 * @returns `true` if `value1` and `value2` are equal, otherwise `false`
 *
 * @example areUnixEqual(1706659200, 1706659200) // true
 * @example areUnixEqual(1706659200, 1704067200) // false
 * @example areUnixEqual(1706659200, 1706659200000, { epochUnit: "seconds" }) // true
 * @example areUnixEqual(1706659200, 1706659200000) // false
 * @example areUnixEqual(-86400000, 0) // false (1969-12-31 is not equal to 1970-01-01)
 */
export declare function areUnixEqual(value1: number, value2: number, options?: {
    epochUnit?: UnixUnit;
}): boolean;