System for Managing Migrations

[mzabaluev]

We should capture and develop the ideas on how should we migrate across changes in data formats and features in our network.
Below is an updating list of formats and interface points that may need to be upgraded in the future.

Protocols and data formats

What	Proposed migration mechanism
Encoding of "blobs" on the DA	On-chain parameters keyed by change height, voted by governance. In centralized stage, MIP-13
DaDB (synced height and executed blocks)	Versioned migrations in the DB
DA light node gRPC protocol	Common gRPC/Protobuf versioning conventions
Movement chain configuration	On-chain governance
Local node configuration	No migrations, node operator responsible for updating
Changes in Aptos VM, storage, and transaction formats	#476

External chain layers

We may need to manage changes that are rolled out on blockchain networks that Movement relies on, but does not control:

• Celestia DA
• Ethereum