export interface IFlow<T> {
    (value: T, onFlowBack?: IFlowBack<T>): void;
    run: <T>(type: string, value?: T, context?: any) => Promise<T>;
    reset: (type: string, value?: T, context?: any) => void;
    return: (value: T) => void;
    set: (key: string, value: any) => void;
    get: (key: string, defaultValue?: any) => any;
    catch: (handler: IIntermediateErrorHandler) => any;
}
export interface IIntermediateErrorHandler {
    (err: any, orginalCallback: ICallback): void;
}
export declare type IFlowBack<T = any> = (result: T, flow: (value: any) => void) => void;
export declare type ISkill<T = any> = (type: string, value: T, flow: IFlow<T>) => void;
export interface ITrackerArg {
    skill: string;
    type: string;
    time: number;
    value: any;
    id: string;
    parents: (string | number)[];
}
export declare type ITracker = (arg: ITrackerArg) => void;
export declare type IPosition = 'START' | 'BEFORE' | 'AFTER' | 'END';
export interface IOptions {
    tracker?: ITracker;
    [s: string]: any;
}
export interface ICallback {
    (err: any): void;
    (err: undefined, result: any): void;
}
export declare type ICallbacks = ICallback | [IErrorCallback, ISuccessCallback];
export interface ISuccessCallback {
    (result: any): void;
}
export interface IErrorCallback {
    (err: any): void;
}
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