Use Virtual Objects in Governance

[Chris-Hibbert]

What is the Problem Being Solved?

For MainNet 1, we must support durable objects for restart and upgrade. This is part way to #5200

Description of the Design

Collect a catalogue of all the persistent data types in Governance, and convert them to Virtual Objects.

Security Considerations

Trust paging of defineKind APIs.

Test Plan

Presumably extensive.

[Tartuffo]

Does need collections, just virtual objects for durability.

[Chris-Hibbert]

A quick survey of current storage:

BinaryVoteCounter

  /** @type {Store<Handle<'Voter'>,RecordedBallot> } */
  const allBallots = makeStore('voterHandle');

The counter itself is an object with state
question, isOpen, questionSpec, outcomePromise, tallyPromise

Committee (and shareHolders)

  /** @type {Store<Handle<'Question'>, QuestionRecord>} */
  const allQuestions = makeStore('Question');

invitations is an array

The committee itself is an object with state:
subscription, publication, committeeName, publicFacet

contractGovernor has no stores, but it has state itself

governParams

  const voteCounters = new WeakSet();

  let poserFacet;
  let currentInvitation;

paramManager

  const namesToParams = makeStore('Parameter Name');
  const { publication, subscription } = makeSubscriptionKit();
  const updateFns = {};

[turadg]

With #7657 it's mostly durable. Any work now will be on making it fully durable, not virtual,

• use Durable objects for governance #5200