export type JsonRpcFetchPort = (input: string | URL | Request, init?: RequestInit) => Promise<Response>;
export declare class JsonRpcClientError extends Error {
    readonly method: string;
    readonly code?: number;
    readonly data?: unknown;
    constructor(input: {
        readonly method: string;
        readonly message: string;
        readonly code?: number;
        readonly data?: unknown;
        readonly cause?: unknown;
    });
}
export declare function requestJsonRpc(input: {
    readonly fetch: JsonRpcFetchPort;
    readonly url: string;
    readonly method: string;
    readonly params: readonly unknown[];
}): Promise<unknown>;
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