/**
 * Base custom error for the SDK. All other custom errors should extend this.
 */
export declare class SdkError extends Error {
    name: string;
    /** Optional stable, machine-readable error code. */
    code?: string | undefined;
    /**
     * @param message - Human-readable error description.
     * @param code - Optional stable, machine-readable error code.
     */
    constructor(message: string, code?: string);
}
/**
 * Error specifically for issues related to authentication.
 */
export declare class AuthError extends SdkError {
    name: string;
    /**
     * @param message - Human-readable error description.
     * @param code - Optional stable, machine-readable error code.
     */
    constructor(message: string, code?: string);
}
/**
 * Error for network-related issues (e.g., API unreachable, bad response).
 */
export declare class NetworkError extends SdkError {
    name: string;
    /** HTTP status code associated with the failed response, when available. */
    status?: number | undefined;
    /**
     * @param message - Human-readable error description.
     * @param status - HTTP status code associated with the failed response.
     * @param code - Optional stable, machine-readable error code.
     */
    constructor(message: string, status?: number, code?: string);
}
/**
 * Asserts that the current environment is a browser.
 * Throws `SdkError` with code `BROWSER_ONLY` when `window` is undefined.
 *
 * @param api - Name of the API that requires a browser (used in the error message).
 */
export declare function assertBrowser(api: string): void;
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