/**
 * Base error class for all MSG91 SDK errors
 */
export declare class Msg91Error extends Error {
    readonly code?: string | undefined;
    readonly statusCode?: number | undefined;
    constructor(message: string, code?: string | undefined, statusCode?: number | undefined);
}
/**
 * Error thrown when the MSG91 API returns an error response
 */
export declare class Msg91ApiError extends Msg91Error {
    readonly requestId?: string | undefined;
    constructor(message: string, statusCode?: number, requestId?: string | undefined);
}
/**
 * Error thrown for input validation failures
 */
export declare class Msg91ValidationError extends Msg91Error {
    readonly field?: string | undefined;
    constructor(message: string, field?: string | undefined);
}
/**
 * Error thrown for network/connection issues
 */
export declare class Msg91NetworkError extends Msg91Error {
    constructor(message: string);
}
/**
 * Error thrown when rate limited by MSG91 API
 */
export declare class Msg91RateLimitError extends Msg91Error {
    constructor(message: string, statusCode: number);
}
/**
 * Error thrown for configuration issues
 */
export declare class Msg91ConfigError extends Msg91Error {
    constructor(message: string);
}
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