/**
 * Error classes for the Slack connector
 *
 * Provides typed errors for Slack connection and message handling failures.
 */
/**
 * Error codes for Slack connector operations
 */
export declare enum SlackErrorCode {
    CONNECTION_FAILED = "SLACK_CONNECTION_FAILED",
    ALREADY_CONNECTED = "SLACK_ALREADY_CONNECTED",
    MISSING_TOKEN = "SLACK_MISSING_TOKEN",
    INVALID_TOKEN = "SLACK_INVALID_TOKEN",
    MESSAGE_SEND_FAILED = "SLACK_MESSAGE_SEND_FAILED",
    SOCKET_MODE_ERROR = "SLACK_SOCKET_MODE_ERROR"
}
/**
 * Base error class for Slack connector operations
 */
export declare class SlackConnectorError extends Error {
    readonly code: SlackErrorCode;
    constructor(message: string, code: SlackErrorCode, options?: {
        cause?: Error;
    });
}
/**
 * Error thrown when connection to Slack fails
 */
export declare class SlackConnectionError extends SlackConnectorError {
    constructor(message: string, options?: {
        cause?: Error;
    });
}
/**
 * Error thrown when attempting to connect while already connected
 */
export declare class AlreadyConnectedError extends SlackConnectorError {
    constructor();
}
/**
 * Error thrown when bot or app token is missing
 */
export declare class MissingTokenError extends SlackConnectorError {
    readonly tokenType: "bot" | "app";
    constructor(tokenType: "bot" | "app", envVar: string);
}
/**
 * Error thrown when a token is invalid
 */
export declare class InvalidTokenError extends SlackConnectorError {
    constructor(message: string, options?: {
        cause?: Error;
    });
}
/**
 * Type guard to check if an error is a SlackConnectorError
 */
export declare function isSlackConnectorError(error: unknown): error is SlackConnectorError;
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