import { TransferStep } from './types';
/**
 * Pack a uint16 array into a hex string (big‑endian, no padding).
 */
export declare function packCoordinates(coords: number[]): string;
/**
 * Build a sorted vertex list plus index lookup for quick coordinate mapping.
 */
export declare function transformToFlowVertices(transfers: TransferStep[], from: string, to: string): {
    sorted: string[];
    idx: Record<string, number>;
};
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