/**
 * Budget manager for x402-cfo agent.
 *
 * Enforces spending limits across multiple time windows (per-request,
 * hourly, daily, session). Uses a rolling-window ledger to track
 * spend in real-time and reject requests that would exceed limits.
 *
 * All amounts are tracked as integer cents internally to avoid
 * floating-point drift.
 */
export interface BudgetLimits {
    /** Max spend per individual request, in dollars (e.g. 2.00) */
    maxPerRequest?: number;
    /** Max spend per rolling hour, in dollars */
    hourly?: number;
    /** Max spend per rolling 24h, in dollars */
    daily?: number;
    /** Max total spend for this session (agent lifetime), in dollars */
    session?: number;
}
export interface BudgetStatus {
    /** Total spent this session, dollars */
    sessionSpent: string;
    /** Spent in the current rolling hour, dollars */
    hourlySpent: string;
    /** Spent in the current rolling 24h, dollars */
    dailySpent: string;
    /** Remaining session budget (null if no limit) */
    sessionRemaining: string | null;
    /** Remaining hourly budget (null if no limit) */
    hourlyRemaining: string | null;
    /** Remaining daily budget (null if no limit) */
    dailyRemaining: string | null;
}
export type BudgetDenialReason = 'exceeds_per_request_limit' | 'exceeds_hourly_limit' | 'exceeds_daily_limit' | 'exceeds_session_limit';
export interface BudgetDecision {
    allowed: boolean;
    reason?: BudgetDenialReason;
    /** Human-readable explanation */
    message?: string;
}
export declare class Budget {
    private limits;
    private entries;
    private sessionSpentCents;
    constructor(limits?: BudgetLimits);
    /**
     * Check if a proposed spend amount is allowed under current limits.
     * Does NOT record the spend — call record() after payment succeeds.
     */
    check(amountDollars: number): BudgetDecision;
    /** Record a successful spend. */
    record(amountDollars: number, timestamp?: number): void;
    /** Get current budget status. */
    status(): BudgetStatus;
    private spentSince;
}
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