import { IFeeConfig, ITokenPair, Mutable, TransactionInput, TransactionOutput } from './types';
export declare const ERROR_MSG: {
    INVALID_FEE_CONFIG: string;
    INVALID_FEE_PERCENT: string;
    INVALID_TOKEN_PAIR: string;
    INVALID_BRIDGE_TOKEN_PAIR: string;
    INVALID_PROVIDER_TYPE: string;
    INVALID_WIDGET_VERSION: string;
};
export declare const isObject: (obj: any) => boolean;
export declare const isNumberOrNumberString: (val: any) => boolean;
export declare const verifyPercent: (feePercent: string | number) => boolean;
export declare const checkFeeConfig: (feeConfig: IFeeConfig) => string;
export declare const verifyChainId: (chainId: string | number) => boolean;
export declare const isSameChain: (tokenPair: ITokenPair) => boolean;
export declare const checkTokenPairChain: (tokenPair: ITokenPair) => boolean;
export declare const verifyWidgetParams: ({ widgetVersion, feeConfig, tokenPair, bridgeTokenPair, providerType }: {
    widgetVersion: any;
    feeConfig?: {};
    tokenPair: any;
    bridgeTokenPair: any;
    providerType: any;
}) => boolean;
export declare function txInputParamsFormatter(options: TransactionInput): Mutable<TransactionOutput>;