/**
 * RiskEngine — pre-trade guardrails the agent must clear before an order
 * touches the exchange. Pure function style: the engine holds only config;
 * Portfolio state is passed in per call so the same engine is reusable.
 *
 * Guardrails enforced:
 *  - Input validation: qty, price and notional must be finite and positive;
 *    a buy's estimated fee must be finite and non-negative. Fails CLOSED —
 *    NaN can never pass a `>` comparison and slip through a cap.
 *  - Cash sufficiency for buys: notional + estimated exchange fee must fit
 *    the cash balance (compared at CASH_EPSILON_USD precision).
 *  - Per-position cap (USD notional any single symbol may hold)
 *  - Total exposure cap (sum of all open positions' notional)
 *  - Sells: the position must exist and the sale must not exceed it; an
 *    estimated fee, when supplied, must not consume the whole proceeds.
 *
 * Exit orders (sells of existing positions) bypass exposure caps — a paranoid
 * cap could otherwise trap the agent in a losing position it wants to exit.
 *
 * This is the documented last line of defense (docs/CONVICTIONS.md #5): the
 * LLM-facing tool validates too, but every order through TradingEngine —
 * buys AND sells — is re-evaluated here by code.
 */
import type { Portfolio } from './portfolio.js';
import type { ExchangeOrder } from './exchange.js';
export interface RiskConfig {
    maxPositionUsd: number;
    maxTotalExposureUsd: number;
}
/**
 * A buy MUST carry the estimated fee — omitting it is a type error, not a
 * silent fee-blind check. A sell MAY carry one (the engine quotes it) so the
 * "fee eats the whole sale" case is caught before the order is placed.
 */
export type OrderRequest = (Omit<ExchangeOrder, 'side'> & {
    side: 'buy';
    feeUsd: number;
}) | (Omit<ExchangeOrder, 'side'> & {
    side: 'sell';
    feeUsd?: number;
});
export interface RiskDecision {
    allowed: boolean;
    reason?: string;
}
export declare class RiskEngine {
    private config;
    constructor(config: RiskConfig);
    check(portfolio: Portfolio, order: OrderRequest): RiskDecision;
    private checkSell;
    private checkBuy;
}