import { Keys } from "koishi";
export type GachaLevel = 'S' | 'R' | 'N';
declare const probability: {
    readonly activity: readonly [151, 1282, 8567];
    readonly weapon: readonly [156, 1498, 8346];
    readonly permanent: readonly [213, 1387, 8400];
};
export type GachaPool = Keys<typeof probability>;
export declare function gachaSelect(pool: GachaPool): GachaLevel;
export {};