export declare type MaimaiDXLamps = "FAILED" | "CLEAR" | "FULL COMBO" | "FULL COMBO+" | "ALL PERFECT" | "ALL PERFECT+";
/**
 * Calculate maimai DX Splash+ (and newer) rate for a score.
 *
 * @param score - The score to calculate the rate for.
 * @param internalChartLevel - The internal decimal level of the chart the score was achieved on.
 * @param lamp - The lamp for this score. Since maimai DX CiRCLE, there is a 1 rating bonus
 * for ALL PERFECT/ALL PERFECT+ scores.
 */
export declare function calculate(score: number, internalChartLevel: number, lamp?: MaimaiDXLamps): number;