import * as Domain from "../../domain";
import { Task } from "../../utils";
/**
 * Define the structure of a Connection
 *
 * Connections are used to capture Protocol specific behaviours and metadata
 */
export interface Connection {
    /**
     * unique identifer for the connection
     */
    uri: string;
    /**
     * current condition of the connection
     */
    state: Connection.State;
    /**
     * handle delivering a Message to the connected entity
     */
    send: (protocol: Connection.Protocol, ctx: Task.Context<any>) => Promise<any | undefined>;
    /**
     * called when a Message is received from this connection
     */
    receive?: (protocol: Connection.Protocol, ctx: Task.Context<any>) => Promise<void>;
    /**
     * handle any desired teardown
     */
    close?: () => Promise<void>;
}
export declare namespace Connection {
    type Protocol = Domain.Message | Domain.ApiRequest | any;
    enum State {
        UNKNOWN = 0,
        NEW = 1,
        REQUESTED = 2,
        DENIED = 3,
        GRANTED = 4,
        CLOSED = 5,
        BROKEN = 6
    }
}