/**
 * MockExchange — deterministic in-memory exchange used by tests and dev mode.
 *
 * Implements the same `ExchangeClient` contract (src/trading/exchange.ts) a
 * real adapter would, so the agent flow can be verified end-to-end without
 * hitting a network or placing real orders. Fills land at the requested
 * price (no slippage) with a configured taker fee in basis points; no
 * latency is simulated.
 *
 * The fee it CHARGES is the exact bps fee; the fee it ESTIMATES is that
 * number rounded up to the cent — the same ceiling/actual split a real venue
 * exhibits, so the engine's fill-fee invariant is exercised honestly here.
 */
import type { Fill } from './portfolio.js';
import type { ExchangeClient, ExchangeOrder } from './exchange.js';
export type { ExchangeClient, ExchangeOrder } from './exchange.js';
export interface MockExchangeOptions {
    prices: Record<string, number>;
    feeBps: number;
}
export declare class MockExchange implements ExchangeClient {
    private prices;
    private feeBps;
    constructor(opts: MockExchangeOptions);
    /** Update the synthetic price book (e.g. to simulate a move in tests). */
    setPrice(symbol: string, priceUsd: number): void;
    estimateFee(order: ExchangeOrder): number;
    placeOrder(order: ExchangeOrder): Promise<Fill>;
    getPrice(symbol: string): Promise<number | null>;
}
/** Fill construction shared by the paper adapters: echo the order, attach the fee. */
export declare function paperFill(order: ExchangeOrder, feeUsd: number): Fill;