export type Sleep = (milliseconds: number) => Promise<void>;
export declare const realSleep: Sleep;
export declare const RETRYABLE_STATUS_CODES: ReadonlySet<number>;
export declare const COMMENT_CREATE_RETRY_MAX_RETRIES = 3;
export declare const COMMENT_CREATE_RETRY_BASE_BACKOFF_MS = 250;
export declare const COMMENT_CREATE_RETRY_TOTAL_BACKOFF_CAP_MS = 5000;
export declare function commentCreateWithDedupRetry(commentBody: string, fetchExisting: () => Promise<ReadonlyArray<{
    text: string;
    createdAt: Date;
}>>, postComment: () => Promise<void>, clock: () => Date, sleep: Sleep, windowMs?: number | null): Promise<void>;
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