Build cross chain bridge with Moralis

Hi. I am following this tutorial to make a cross chain bride. I have some question just want to ask

  1. What is unpkg.com/[email protected]/dist/moralis.js:1 and what should I do if it did not work!

  2. I can not defined: childTokenAddress, sideBridgeAddress, mainTokenAddress
    ,mainBridgeAddress

Anyone can give me some advise in this case.
Thank you

You need to use moralis-v1 SDK, not 2.0 (2.6.0).

You can check the project repo to compare your code if you are getting variable is not defined errors.