Transaction not identical after serialize/deserialize

[jbencin]

What version of Stacks.js are you using?

4.3.8

Describe the bug

Serializing and the deserializing a transaction does not quite result in the same transaction. For example, this following vitest unit test will fail:

test('StacksTransaction serialize/deserialize', async () => {
  const options = { /* ... */ };
  const tx = await makeUnsignedSTXTokenTransfer(options);
  const tx_encoded = tx.serialize();
  const tx_decoded = deserializeTransaction(tx_encoded);

  expect(tx_decoded).toEqual(tx);
})

The reason it fails is that the memo.content field will have a large array of null bytes:

content: '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'

When it should be an empty string:

content: ''

How to reproduce

See example unit test above

Expected behavior

memo.content should deserialize to en empty string, and the deserialized StacksTransaction should deep equal the initial StacksTransaction

Additional context

This is using NodeJS 20.7.0