import ErrorCode from './ErrorCode.js';
export declare class ParameterRequiredException extends Error {
    code: ErrorCode;
    constructor(name: string);
}
export declare class SignMessageException extends Error {
    code: ErrorCode;
    constructor();
}
declare const _default: {
    ParameterRequiredException: typeof ParameterRequiredException;
    SignMessageException: typeof SignMessageException;
};
export default _default;