Promise waterfall

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How to structure nested Promises 2 answers

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You've got a promise anti pattern happening. You can return promises from promises to avoid nesting the promises like you've done.

promiseOne()
    .then(() => promiseTwo())
    .then(() => promiseThree())
    .then(() => promiseFour());

By the way Node supports the built in Promise constructor.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise

const promise = new Promise((resolve, reject) => {
    // do something and then resolve
    resolve();
})
promise().then(() => { ... });

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