import type { ExchangeAdapter, SpotAdapter } from "./exchanges/index.js";
export interface LiquidityCheck {
    /** Max executable size (base) within slippage tolerance */
    maxSize: number;
    /** Estimated avg fill price for the given size */
    avgFillPrice: number;
    /** Estimated slippage % vs mid price */
    slippagePct: number;
    /** Total depth in USD on the relevant side */
    depthUsd: number;
    /** Whether the full requested size can be filled */
    canFillFull: boolean;
    /** Recommended size (capped by liquidity) */
    recommendedSize: number;
}
/**
 * Walk through orderbook levels and compute how much can be filled
 * within the given slippage tolerance.
 *
 * @param levels - [[price, size], ...] from getOrderbook (asks for buy, bids for sell)
 * @param maxSlippagePct - max acceptable slippage from best price (default 0.5%)
 * @param requestedSizeUsd - desired position size in USD
 */
export declare function computeExecutableSize(levels: [string, string][], requestedSizeUsd: number, maxSlippagePct?: number): LiquidityCheck;
/**
 * Check liquidity on both sides for an arb entry.
 * Returns adjusted size or 0 if not viable.
 */
export declare function checkArbLiquidity(longAdapter: ExchangeAdapter, shortAdapter: ExchangeAdapter, symbol: string, sizeUsd: number, maxSlippagePct?: number, log?: (msg: string) => void): Promise<{
    viable: boolean;
    adjustedSizeUsd: number;
    longSlippage: number;
    shortSlippage: number;
}>;
/**
 * Check liquidity for a spot+perp arb pair.
 * Spot side uses asks (for buy) or bids (for sell).
 * Perp side uses bids (for short entry) or asks (for long entry).
 */
export declare function checkSpotPerpLiquidity(spotAdapter: SpotAdapter, perpAdapter: ExchangeAdapter, spotSymbol: string, perpSymbol: string, sizeUsd: number, maxSlippagePct?: number, log?: (msg: string) => void): Promise<{
    viable: boolean;
    adjustedSizeUsd: number;
    spotSlippage: number;
    perpSlippage: number;
}>;