import type * as Webhooks from '../../internal/Webhooks.js';
import type * as Db from '../Db.js';
import type * as db_Schema from '../Schema.js';
/** Columns of the `webhook_queue_completions` table, derived from `Schema.WebhookQueueCompletion`. */
export type Table = db_Schema.WebhookQueueCompletion;
/** A terminal delivery-obligation outcome. */
export type TerminalStatus = db_Schema.WebhookQueueCompletion['status'];
/**
 * Reads the unexpired completion for a reference, if any. Rows are written by
 * the queue-event terminal transition and only ever read for dedupe.
 */
export declare function get(db: Db.Db, reference: Webhooks.QueueReference, now: string): Promise<Table | null>;
/** Deletes expired completions, bounded per call; expiry is filtered at query time, so pruning is space-only. */
export declare function pruneExpired(db: Db.Db, now: string): Promise<number>;
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