import * as TE from 'fp-ts/lib/TaskEither';
export declare enum ErrorType {
    Internal = "Internal",
    API = "API",
    Cancelled = "Cancelled"
}
export declare type AppError<T = ErrorType> = {
    readonly type: T;
};
export declare type CancelledError = AppError<ErrorType.Cancelled>;
export declare type InternalError = AppError<ErrorType.Internal> & {
    readonly message: string;
    readonly rootCause?: Error;
};
export declare type ApiError<T> = AppError<ErrorType.API> & {
    readonly code: T;
};
export declare const cancelledError: CancelledError;
export declare const internalError: (message: string, rootCause?: Error | undefined) => InternalError;
export declare const apiError: <T>(code: T) => ApiError<T>;
export declare type TaskEitherError<T> = TE.TaskEither<AppError, T>;
export declare type TaskExecutor<P, T> = (params: P) => TaskEitherError<T>;
export declare type TaskLoader<T> = () => TaskEitherError<T>;