Is it possible to use async await in rules?

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Question: Is it possible to use async await in rules?

Answer:

Yes, you can use async/await in a rule.

You can use it in a function that you define, or you can use it directly in the top-level function.

In a function within the rule:

In this example, we create a getEcho function that we can define as async.

function (user, context, callback) {
  const axios = require("axios");
  const getEcho = async () => {
    try {
      const resultA = await axios.get("https://postman-echo.com/get?foo1=bar1");
      console.log(resultA.data);
      const resultB = await axios.get(`https://postman-echo.com/get?foo2=${resultA.data.args.foo1}`);
      console.log(resultB.data);
    } catch (error) {
      console.error(error);
      throw error;
    }
  };
  getEcho()
    .then(() => callback(null, user, context))
    .catch((e) => callback(new Error("Error echoing " + e.msg)));
}

In the top level function:

In this example, we define the top-level function as async.

async function (user, context, callback) {
  const axios = require("axios");
  try {
    const resultA = await axios.get("https://postman-echo.com/get?foo1=bar1");
    console.log(resultA.data);
    const resultB = await axios.get(`https://postman-echo.com/get?foo2=${resultA.data.args.foo1}`);
    console.log(resultB.data);
  } catch (error) {
    callback(new Error("Error echoing " + error.msg));
  }
  return callback(null, user, context);
}

Supporting Documentation:

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