Implementing code-less metadata updater and updating dependencies

[liarco]

The new TemplatedMetadataUpdater allows to deploy this solution without touching a single line of code in most of the cases (even when shuffling the tokens).

Usage

The new METADATA_TEMPLATE env variable can be set to null (metadata is kept as is) or a JSON object that is used in order to update the metadata for each token.

Some placeholder keys are also provided for dynamic replacement:

• {TOKEN_ID}
• {INT_TOKEN_ID}: a value matching this string exactly will be replaced with the token ID as an integer value
• {ASSET_URI}: please remember that the "image" key is already replaced by default! TemplatedMetadataUpdater

Example:

In a collection where tokens have been shuffled (e.g. token number 1234 becomes 5678), you may have the need to update that ID in some properties such as name.

Original metadata:

{
  ..
  "name": "My awesome token (#1234)"
  ..
}

Metadata template:

{
  "name": "My awesome token (#{TOKEN_ID})"
}

App output:

{
  ..
  "name": "My awesome token (#4567)"
  ..
}