import type { TradingRuntime } from "../trading.js";
export type SpotSide = "buy" | "sell";
export type GridSide = "long" | "short" | "neutral";
export type StrategyLog = (message: string) => void;
export declare function elapsedSeconds(startedAt: number): number;
export declare function round(value: number, digits?: number): number;
export declare function quantizeDown(value: number, step: number): number;
export declare function sleep(ms: number): Promise<void>;
export declare function createSignalState(): {
    isRunning(): boolean;
    dispose(): void;
};
export declare function safeMidPrice(runtime: TradingRuntime, poolKey: string): Promise<number | undefined>;
export declare function logStrategy(prefix: string, message: string, log: StrategyLog): void;