wormhole-explorer/blockchain-watcher/TODO.md

Each blockchain has three watchers,

• A websocket watcher for low latency
• A querying watcher
• And a sequence gap watcher

These three watchers all invoke the same handler callback.

The handler callback is responsible for:

• Providing the watchers with the necessary query filter information
• parsing the event into a persistence object
• invoking the persistence manager

The persistence manager is responsible for:

• Inserting records into the database in a safe manner, which takes into account that items will be seen multiple times.
• Last write wins should be the approach taken here.