Add metric for indexed cadence block height

peterargue commented 1 month ago

Closes: #570

Description

Add metric for latest cadence block height

For contributor use:

[x] Targeted PR against master branch
[x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
[x] Code follows the standards mentioned here.
[x] Updated relevant documentation
[x] Re-reviewed Files changed in the Github PR explorer
[x] Added appropriate labels

Summary by CodeRabbit

New Features
- Introduced a new method to index Cadence block heights, enhancing metrics collection capabilities.
- Added functionality to the event processing engine to track Cadence heights alongside existing metrics.
Bug Fixes
- Improved the handling of Cadence height events in the metrics collector.

coderabbitai[bot] commented 1 month ago

Walkthrough

The changes introduce a new method, CadenceHeightIndexed, to the Collector interface and its implementation in metrics/collector.go, allowing for the tracking of Cadence block heights. A corresponding gauge, cadenceBlockHeight, is added to monitor this metric. Additionally, the nopCollector in metrics/nop.go is updated to include the new method. The processEvents method in services/ingestion/engine.go is modified to call the new method, enabling the indexing of Cadence heights during event processing.

Changes

Files	Change Summary
metrics/collector.go	Added method `CadenceHeightIndexed(height uint64)` to `Collector` interface; introduced `cadenceBlockHeight` gauge in `DefaultCollector`.
metrics/nop.go	Added method `CadenceHeightIndexed(uint64)` to `nopCollector` struct.
services/ingestion/engine.go	Modified `processEvents` method to call `e.collector.CadenceHeightIndexed(events.CadenceHeight())`.

Assessment against linked issues

Objective	Addressed	Explanation
Add metric for cadence block height (#570)	✅

🐰 In the meadow where bunnies play,
A new height metric has come to stay.
With cadence tracked, we hop with glee,
Collecting data, as happy as can be!
Metrics grow, our joy is bright,
Hopping high, in the moonlight! 🌙✨

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peterargue commented 1 month ago

LGTM! 👏 Left just a comment/question, regarding the intention of this metric.

Oops. I was too fast on the merge and didn't see your comment. I opened https://github.com/onflow/flow-evm-gateway/pull/589 to address it.

onflow / flow-evm-gateway