/**
 * PostgresAuditSink — durable AuditSink adapter backed by PostgreSQL.
 *
 * Companion schema: src/manifest/audit/sinks/postgres.sql.
 * Uses the `pg` client (already a Manifest dependency for stores.node.ts).
 *
 * Idempotency: enforced at the SQL layer via
 *   INSERT … ON CONFLICT (record_id) DO NOTHING
 * so retries from a buggy upstream consumer never double-write.
 *
 * Transactionality: this adapter inserts on its own connection by default.
 * Callers who need audit emission inside a larger transaction should pass
 * a PoolClient already bound to that transaction via `client`.
 *
 * DO NOT import this file in browser code — it requires `pg`.
 */
import type { Pool, PoolClient } from 'pg';
import type { AuditRecord, AuditSink } from '../audit-sink';
export interface PostgresAuditSinkOptions {
    /** A pg Pool. The sink does NOT own the pool's lifecycle. */
    pool: Pool;
    /** Table name override. Default: `manifest_audit_records`. */
    tableName?: string;
}
export declare class PostgresAuditSink implements AuditSink {
    private pool;
    private tableName;
    constructor(opts: PostgresAuditSinkOptions);
    emit(record: AuditRecord, client?: PoolClient): Promise<void>;
}
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