export interface RuleStats {
    fired: number;
    bytesIn: number;
    bytesOut: number;
    matchNoReduction: number;
    firstSeen: string;
    lastSeen: string;
}
export interface StatsState {
    rules: Record<string, RuleStats>;
}
export declare const DEFAULT_STATS_PATH: string;
export declare function _resetWarnedForTest(): void;
export declare function readStats(statsPath?: string): StatsState;
export declare function mergeRecord(state: StatsState, ruleName: string, bytesIn: number, bytesOut: number, timestamp: string): StatsState;
export declare function writeStats(state: StatsState, statsPath?: string): void;
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