@ledgerhq/live-common/src/platform/JSONRPCServer.ts

Common ground for the Ledger Live apps

import { useEffect, useRef, useCallback } from "react";
import { JSONRPCServer, JSONRPCServerAndClient, JSONRPCClient } from "json-rpc-2.0";
type LedgerLiveAPIHandlers = Record<string, (any) => any>;
type SendFunc = (request: any) => Promise<void>;
export const useJSONRPCServer = (
  handlers: LedgerLiveAPIHandlers,
  send: SendFunc,
): Array<SendFunc> => {
  const serverRef: {
    current: null | JSONRPCServerAndClient;
  } = useRef(null);

  useEffect(() => {
    const server = new JSONRPCServerAndClient(new JSONRPCServer(), new JSONRPCClient(send));
    const methodIds = Object.keys(handlers);
    methodIds.forEach((methodId: string) => {
      server.addMethod(methodId, handlers[methodId]);
    });
    serverRef.current = server;
  }, [send, handlers]);
  const receive = useCallback(async (request: any) => {
    if (serverRef.current) {
      await serverRef.current.receiveAndSend(request);
    }
  }, []);

  return [receive];
};