export declare type GraphNode = string;
export interface IGraphEdge {
    from: GraphNode;
    to: GraphNode;
    cost: number;
}
export declare type GoalFunction = (_: GraphNode) => boolean;
export declare type Goal = GraphNode | GoalFunction;
export interface IAstarOptions<T extends IGraphEdge> {
    exitArcsForNodeId?: (f: GraphNode) => T[];
    h?: (f: GraphNode, t: GraphNode) => number;
}
export interface IGraphPath<T extends IGraphEdge = IGraphEdge> {
    cost: number;
    path: T[];
}
export declare class Astar<T extends IGraphEdge = IGraphEdge> {
    constructor(customCallbackFuncs?: IAstarOptions<T>);
    h(from: GraphNode, to: GraphNode): number;
    lookupH(from: GraphNode, to: GraphNode): Promise<number>;
    exactMatchGoalFunc(goalNodeId: GraphNode): (testNodeId: string) => Promise<boolean>;
    cleanGoalFunc(goalOrGoalFunc: Goal): (testNodeId: string) => Promise<boolean>;
    exitArcsForNodeId(nodeId: GraphNode): T[];
    lookupExitArcsForNodeId(nodeId: GraphNode): Promise<T[]>;
    private findPathGenerator(startNodeId, goalOrGoalFunc);
    findPath(startNodeId: GraphNode, goalFunc: Goal): Promise<IGraphPath<T>>;
    static Debug: () => typeof Astar;
}