export interface ChannelMessage {
    userId?: string;
    channel?: string;
    text: string;
    messageId?: string;
}
export declare abstract class BaseChannel {
    protected onMessageCallback?: (msg: ChannelMessage) => Promise<string>;
    onMessage(cb: (msg: ChannelMessage) => Promise<string>): void;
    abstract start(): Promise<void>;
    abstract stop(): Promise<void>;
}
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