import { type RouteOption } from "zrouter-sdk";
/**
 * Fetch routes from the zrouter-api HTTP service.
 * Returns RouteOption[] sorted best-first, or null on failure.
 */
export declare function fetchApiRoutes(params: {
    chainId: number;
    tokenIn: {
        address: string;
        id?: bigint;
    };
    tokenOut: {
        address: string;
        id?: bigint;
    };
    side: string;
    amount: bigint;
    owner: string;
    slippageBps?: number;
}): Promise<RouteOption[] | null>;
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