TypeError Base64 is not a function when using Buffer.from in Node 4.3

Question

I am debugging a lambda function locally on Node 4.3 using the standard Amazon Machine Image (linux x64)

When I run the program, I get an error in a function that is

Answer 1

I finally found an answer on Stack Overflow that answers this question.

NodeJS: How to decode base64 encoded string back to binary?

In node 5.3 & below, you need to use the buffer constructor (ie: new Buffer) instead of Buffer.from