import { SwapRequestParam } from '../../types';
import { ButterTransactionResponse } from '../../types/responseTypes';
export declare class ButterSwap {
    /**
     * The BridgeToken method is used to bridge token from one chain to another.
     * see {@link BridgeRequestParam} for detail
     * @param token source token, aka token that user provide
     * @param toAddress target chain receiving address
     * @param swapRoute best cross-chain swap route, see {@link ButterCrossChainRoute}
     * @param options of bridging, check {@link SwapOptions} for more details
     * @return ButterTransactionResponse
     */
    omnichainSwap({ fromAddress, fromToken, toAddress, toToken, amountIn, swapRouteStr, slippage, options, }: SwapRequestParam): Promise<ButterTransactionResponse>;
    gasEstimateSwap({ fromAddress, fromToken, toAddress, toToken, amountIn, swapRouteStr, slippage, options, }: SwapRequestParam): Promise<string>;
}