import type { Pool } from "pg";
import type { CandidateLifecycleState, CorrectionCandidate, CorrectionCandidateStore } from "../correction.js";
/**
 * Durable, cross-process `CorrectionCandidateStore` backed by
 * `remem.correction_candidates` (migration 0007). `update` uses
 * `SELECT ... FOR UPDATE` inside a transaction, so a concurrent `update` on
 * the same id blocks until this one commits or rolls back -- the same
 * atomicity guarantee `InMemoryCorrectionCandidateStore` gets for free from
 * JS's single-threaded execution, extended across processes.
 */
export declare class PostgresCorrectionCandidateStore implements CorrectionCandidateStore {
    private readonly pool;
    private readonly providerId;
    constructor(pool: Pool, providerId: string);
    insert(candidate: CorrectionCandidate): Promise<void>;
    get(candidateId: string): Promise<CorrectionCandidate | undefined>;
    list(filter?: {
        state?: CandidateLifecycleState;
    }): Promise<CorrectionCandidate[]>;
    update(candidateId: string, mutate: (candidate: CorrectionCandidate) => CorrectionCandidate): Promise<CorrectionCandidate>;
}