Issue MPT with Metadata (JavaScript)

Creates a sample MPT issuance with metadata encoded as JSON according to the XLS-89 standard.

Quick setup and usage:

npm i
node issue-mpt-with-metadata.js

The script should output a validated transaction and end with a line such as the following:

MPToken created successfully with issuance ID 005073C721E14A7613BAAF5E0B1A253459832FF8D0D81278.