/**
 * StrictDB Logger — Structured operation logging
 *
 * Emits operation events with timing, receipt, and optionally the native query.
 */
import type { OperationReceipt } from './types.js';
import type { StrictDBEventEmitter } from './events.js';
export interface LoggerConfig {
    enabled: boolean;
    verbose: boolean;
    slowQueryMs: number;
}
export declare class StrictDBLogger {
    private config;
    private emitter;
    constructor(config: LoggerConfig, emitter: StrictDBEventEmitter);
    /**
     * Log a completed operation.
     */
    logOperation(receipt: OperationReceipt, _nativeQuery?: string | object): void;
}
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