export interface TransportOptions {
    url?: string;
    /**
     * WebSocket URL
     * NOTE: WebSocket functionality is currently not supported.
     * This field is kept for backward compatibility only.
     * Please use HTTP transport (via url field) for API calls.
     */
    websocket?: string;
    transport?: string | unknown;
    /**
     * HTTPS/TLS options (Node.js only; browser fetch does not support custom CA).
     * When set, requests use undici Agent with these options for certificate verification.
     */
    httpsOptions?: {
        rejectUnauthorized?: boolean;
        ca?: string | Buffer | string[];
    };
    [key: string]: unknown;
}
export interface JsonRpcRequest {
    id: number;
    method: string;
    params: unknown[];
    jsonrpc?: string;
}
export interface JsonRpcResponse {
    id: number;
    result: unknown;
    error?: {
        code: number;
        message: string;
        data?: unknown;
    };
}
export interface Transport {
    options: TransportOptions;
    start(): Promise<void>;
    stop(): Promise<void>;
    setOptions(options: TransportOptions): void;
    send(api: string, data: unknown, callback: (error: Error | null, result?: unknown) => void): void | Promise<void>;
}