/**
 * Base error class for App SDK errors
 */
export declare class AppSDKError extends Error {
    readonly code: string;
    constructor(message: string, code: string);
}
/**
 * Error thrown when input validation fails
 */
export declare class ValidationError extends AppSDKError {
    readonly details: unknown;
    constructor(message: string, details?: unknown);
}
export declare const FunctionCallErrorCode: {
    readonly UnprocessableEntity: 1;
    readonly BadRequest: 2;
    readonly NotFound: 3;
    readonly Conflict: 4;
    readonly Internal: -32603;
};
export type FunctionCallErrorCode = (typeof FunctionCallErrorCode)[keyof typeof FunctionCallErrorCode];
export interface FunctionCallErrorOptions {
    data?: unknown;
    type?: string;
}
/**
 * Error returned to Channel.io as a JSON-RPC function error.
 *
 * Throw this from a function handler when the function call itself should fail
 * with an application-level JSON-RPC error instead of an HTTP 500.
 */
export declare class FunctionCallError extends AppSDKError {
    readonly rpcCode: number;
    readonly data: unknown;
    readonly type: string | undefined;
    constructor(message: string, rpcCode: number, options?: FunctionCallErrorOptions);
    toResponse(): {
        code: number;
        message: string;
        data?: unknown;
        type?: string;
    };
}
export declare class FunctionCallNotFoundError extends FunctionCallError {
    constructor(message?: string, options?: FunctionCallErrorOptions);
}
/**
 * Error thrown when a function is not found
 */
export declare class FunctionNotFoundError extends AppSDKError {
    readonly methodName: string;
    constructor(methodName: string);
}
/**
 * Error thrown when an extension is not found
 */
export declare class ExtensionNotFoundError extends AppSDKError {
    readonly extensionName: string;
    constructor(extensionName: string);
}
/**
 * Error thrown when configuration is invalid
 */
export declare class ConfigurationError extends AppSDKError {
    constructor(message: string);
}
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