export interface JsonRpcError {
    code: number;
    message: string;
    data?: unknown;
}
export interface JsonRpcRequest {
    jsonrpc: '2.0';
    id?: string | number | null;
    method: string;
    params?: Record<string, unknown>;
}
export type JsonRpcResponse = {
    jsonrpc: '2.0';
    id: string | number | null;
    result: unknown;
} | {
    jsonrpc: '2.0';
    id: string | number | null;
    error: JsonRpcError;
};
export interface Channel {
    closed: boolean;
    addEventListener(event: 'close', listener: () => void): () => void;
    addEventListener(event: 'response', listener: (response: JsonRpcResponse) => void): () => void;
    send(request: JsonRpcRequest): Promise<void>;
    close(): Promise<void>;
}
export interface Transport {
    establishChannel(): Promise<Channel>;
}
export declare const isJsonRpcRequest: (message: unknown) => message is JsonRpcRequest;
export declare const isJsonRpcResponse: (message: unknown) => message is JsonRpcResponse;