/**
 * A transactionId - alias for string
 * @category Database
 */
export type TransactionId = string;
/**
 * Represents an error thrown during an RPC (Remote Procedure Call) made by the Squid SDK.
 *
 * This error contains detailed HTTP-level information such as the status code, response body,
 * headers, and the request URL, allowing for better debugging and error handling in client code.
 */
export declare class SquidClientError<BodyType = unknown> extends Error {
    readonly statusCode: number;
    readonly url?: string | undefined;
    readonly headers?: Record<string, string> | undefined;
    readonly body?: BodyType | undefined;
    /**
     * Creates a new `SquidClientError` instance.
     *
     * @param message - A custom error message.
     * @param statusCode - The HTTP status code returned by the server (e.g., 400, 403, 422).
     * @param url - The URL that was called when the error occurred.
     * @param headers - The HTTP response headers.
     * @param body - The parsed body of the error response.
     */
    constructor(message: string, statusCode: number, url?: string | undefined, headers?: Record<string, string> | undefined, body?: BodyType | undefined);
}