import { UnsignedOrder } from '../order-signing';
import { CowEnv } from '../common';
import { SupportedChainId } from '../chains';
import { EthFlowOrderExistsCallback } from './types';
export declare function calculateUniqueOrderId(chainId: SupportedChainId, order: UnsignedOrder, checkEthFlowOrderExists?: EthFlowOrderExistsCallback, env?: CowEnv): Promise<string>;