import { DatabaseService } from '../database/database.service.js';
export type TokenUsageSource = 'chat' | 'scheduled_task';
export interface RecordTokenUsageDto {
    sessionId: string;
    source: TokenUsageSource;
    taskId?: string;
    executionId?: string;
    promptTokens: number;
    completionTokens: number;
}
export interface TokenUsageTotal {
    totalPromptTokens: number;
    totalCompletionTokens: number;
    totalTokens: number;
}
export declare class UsageService {
    private readonly db;
    constructor(db: DatabaseService);
    recordUsage(dto: RecordTokenUsageDto): void;
    getTotal(): TokenUsageTotal;
}