import { TezosToolkitConfigError, NetworkError } from '@taquito/core';
/**
 *  @category Error
 *  @description Error that indicates undefined confirmation has not been specified or configured
 */
export declare class ConfirmationUndefinedError extends TezosToolkitConfigError {
    constructor();
}
/**
 *  @category Error
 *  @description Error that indicates a generic failure when trying to fetch an observable
 */
export declare class ObservableError extends NetworkError {
    readonly message: string;
    constructor(message: string);
}