/**
 * Known error codes thrown by the SDK.
 *
 * Use these constants for typed `catch` handling instead of comparing raw strings.
 *
 * @example
 * ```typescript
 * import { ConnectError, ConnectErrorCode } from "vana-cli/core";
 *
 * try {
 *   await getData({ privateKey, grant });
 * } catch (err) {
 *   if (err instanceof ConnectError && err.code === ConnectErrorCode.SERVER_NOT_FOUND) {
 *     // handle missing server
 *   }
 * }
 * ```
 */
export declare const ConnectErrorCode: {
    readonly SESSION_INIT_FAILED: "SESSION_INIT_FAILED";
    readonly SESSION_EXPIRED: "SESSION_EXPIRED";
    readonly POLL_FAILED: "POLL_FAILED";
    readonly POLL_TIMEOUT: "POLL_TIMEOUT";
    readonly SERVER_NOT_FOUND: "SERVER_NOT_FOUND";
    readonly GATEWAY_ERROR: "GATEWAY_ERROR";
    readonly DATA_FETCH_FAILED: "DATA_FETCH_FAILED";
    readonly LIST_SCOPES_FAILED: "LIST_SCOPES_FAILED";
    readonly LIST_VERSIONS_FAILED: "LIST_VERSIONS_FAILED";
    readonly CONFIG_INVALID: "CONFIG_INVALID";
    readonly WEBHOOK_INVALID: "WEBHOOK_INVALID";
};
/** Union type of all known error code string values. */
export type ConnectErrorCode = (typeof ConnectErrorCode)[keyof typeof ConnectErrorCode];
/**
 * Error class thrown by all SDK operations.
 *
 * Includes a typed {@link code} for programmatic handling and an optional
 * {@link statusCode} from HTTP responses.
 */
export declare class ConnectError extends Error {
    /** Machine-readable error code. One of {@link ConnectErrorCode} or an arbitrary server-returned string. */
    readonly code: ConnectErrorCode | (string & {});
    /** HTTP status code from the upstream response, if applicable. */
    readonly statusCode?: number;
    constructor(message: string, code: ConnectErrorCode | (string & {}), statusCode?: number);
}
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