import { SmrtClassOptions } from '@happyvertical/smrt-core';
import { CampaignChannelCollection, CampaignCollection, CampaignMetricSnapshotCollection } from '../collections/index.js';
import { BudgetPacingResult } from '../types.js';
/** Computes spend-to-budget pacing from immutable snapshots; stores nothing. */
export declare class BudgetPacingService {
    private readonly campaigns;
    private readonly channels;
    private readonly snapshots;
    constructor(campaigns: CampaignCollection, channels: CampaignChannelCollection, snapshots: CampaignMetricSnapshotCollection);
    static create(classOptions?: SmrtClassOptions): Promise<BudgetPacingService>;
    getCampaignPacing(campaignId: string, at?: Date): Promise<BudgetPacingResult>;
    getChannelPacing(campaignChannelId: string, at?: Date): Promise<BudgetPacingResult>;
    /**
     * Prefer a campaign rollup for each exact reporting period, while retaining
     * channel evidence for periods that do not yet have a rollup. This prevents
     * double counting without dropping earlier/later channel-only periods.
     */
    private selectCampaignEvidence;
    private periodKey;
}
export default BudgetPacingService;
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