export declare const DEFAULT_TTL_MS = 86400000;
export declare const DEFAULT_CAP_PER_ENDPOINT = 1000;
export interface ReceivedMessageCorrelationCacheOptions {
    ttlMs?: number;
    capPerEndpoint?: number;
    now?: () => number;
}
export type ReplyAwareResolve = {
    ok: true;
} | {
    ok: false;
    reason: "unknown_correlation_id" | "wrong_endpoint" | "ttl_expired";
};
export interface ReceivedMessageCorrelationCache {
    record(endpoint_id: string, correlation_id: string): void;
    resolve(endpoint_id: string, correlation_id: string): ReplyAwareResolve;
    size(): number;
    sizeForEndpoint(endpoint_id: string): number;
    sweep(now?: number): number;
    forgetEndpoint(endpoint_id: string): void;
}
export declare function createReceivedMessageCorrelationCache(opts?: ReceivedMessageCorrelationCacheOptions): ReceivedMessageCorrelationCache;
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