import * as plugins from '../../plugins.js';
export interface IEmailTrafficBucketCounts {
    sent: number;
    received: number;
    failed: number;
}
export interface IEmailTrafficBucketSnapshot extends IEmailTrafficBucketCounts {
    bucketStart: number;
}
export declare class EmailTrafficBucketDoc extends plugins.smartdata.SmartDataDbDoc<EmailTrafficBucketDoc, EmailTrafficBucketDoc> implements IEmailTrafficBucketSnapshot {
    id: string;
    bucketStart: number;
    sent: number;
    received: number;
    failed: number;
    createdAt: number;
    updatedAt: number;
    constructor();
    private static getNativeCollection;
    private static validateSnapshot;
    /** Persist retry-safe absolute monotonic counters. */
    static persistAbsolute(snapshotsArg: IEmailTrafficBucketSnapshot[]): Promise<void>;
    static loadSince(cutoffArg: number): Promise<IEmailTrafficBucketSnapshot[]>;
    static pruneBefore(cutoffArg: number): Promise<number>;
}