/** Token bucket rate limiter for throttling target calls. */
export interface RateLimiter {
    /** Acquire a token. Resolves when a request slot is available. Supports AbortSignal for cancellation. */
    readonly acquire: (signal?: AbortSignal) => Promise<void>;
    /** Release resources (clear timers, reject pending acquisitions). */
    readonly dispose: () => void;
}
/** Options for creating a token bucket rate limiter. */
export interface TokenBucketOptions {
    /** Maximum number of target calls allowed per minute. */
    readonly maxRequestsPerMinute: number;
}
/** Creates a token bucket rate limiter that spaces target calls at fixed intervals. Queued acquisitions are processed FIFO. Call `dispose()` to clear timers and reject pending acquisitions. */
export declare function createTokenBucketLimiter(options: TokenBucketOptions): RateLimiter;
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