xstate-awaitable-send

An awaitable xstate Interpreter#send made for use in backend applications with request-response communication (e.g. Node servers such as fastify, express and koa).

It will wait until any internal invocations of services have completed and resolve either (a) when it reaches a StateNode that is 'final', (b) when it is waiting for further events from the user, or (c) when the current StateNode has no more events that can cause transitions.

import { createAwaitableSend } from "xstate-awaitable-send";

import { asyncMachine } from "./asyncMachine";

export async function doThing(currentState) {
  const send = createAwaitableSend(
    interpret(asyncMachine).start(State.create(currentState))
  );

  const [state] = await send("YOUR_EVENT");

  // ...
}

// ...