export interface LimitNginMemoryAlgorithm<T> {
    shouldBlock(key: string): boolean;
    getState(key: string): T | undefined;
    getRemaining(key: string): number;
    getResetMs(key: string): number;
    cleanUp(): void;
}
export type TokenBucketEntry = {
    tokens: number;
    lastRefillTs: number;
};
export type SlidingCounterEntry = {
    currentWindowStart: number;
    currentCount: number;
    previousCount: number;
};
export declare class MemTokenBucket implements LimitNginMemoryAlgorithm<TokenBucketEntry> {
    private store;
    private capacity;
    private intervalMs;
    private refillRatePerMs;
    private cleanupTimer;
    constructor(capacity: number, intervalInMs: number);
    getState(key: string): TokenBucketEntry | undefined;
    shouldBlock(key: string): boolean;
    getRemaining(key: string): number;
    getResetMs(key: string): number;
    cleanUp(): void;
}
export declare class MemSlidingWindowCounter implements LimitNginMemoryAlgorithm<SlidingCounterEntry> {
    private store;
    private capacity;
    private intervalMs;
    private cleanupTimer;
    constructor(allowedNoOfRequests: number, intervalInMs: number);
    getState(key: string): SlidingCounterEntry | undefined;
    shouldBlock(key: string): boolean;
    getRemaining(key: string): number;
    getResetMs(key: string): number;
    cleanUp(): void;
}
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