No Share is a custom datatype and is encoded like described in the extension spec.
Is implemented here: share-accounting-ext/src/data_types.rs at 281c1cbc4f9a07b21a443753a525197dc5d8e18c · demand-open-source/share-accounting-ext · GitHub
yeah I was making some confusion there, thanks for the clarification!
edited those questions out of my previous message to avoid further propagating my misunderstanding