19 lines
598 B
Markdown
19 lines
598 B
Markdown
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Each blockchain has three watchers,
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- A websocket watcher for low latency
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- A querying watcher
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- And a sequence gap watcher
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These three watchers all invoke the same handler callback.
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The handler callback is responsible for:
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- Providing the watchers with the necessary query filter information
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- parsing the event into a persistence object
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- invoking the persistence manager
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The persistence manager is responsible for:
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- Inserting records into the database in a safe manner, which takes into account that items will be seen multiple times.
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- Last write wins should be the approach taken here.
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