EndpointAvailability

[auricom]

Overview

[gemini-code-assist]

Summary of Changes

Hello @auricom, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the monitoring capabilities for JSON-RPC endpoints by introducing a dedicated metric for tracking endpoint availability and refining the existing request duration metrics. These changes provide more granular insights into the health and performance of connected EVM nodes, allowing for better operational visibility and faster detection of potential issues.

Highlights

• Endpoint Availability Monitoring: Introduced a new endpoint_availability metric to track the reachability status of JSON-RPC endpoints, providing clear visibility into their operational state.
• Enhanced RPC Duration Metrics: Replaced the static JsonRpcRequestSloSeconds gauge with a more dynamic JsonRpcRequestDurationSummary metric, which offers percentile-based duration tracking over a rolling window for JSON-RPC requests.
• RPC URL Exposure: Added a GetRPCURL method to the EVM client, enabling monitoring functions to retrieve and use the specific RPC URL when recording endpoint availability.
• Tooling Configuration: A new mise.toml file was added to configure the mise tool (formerly rtx) to specify the latest Go version for development environments.

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[gemini-code-assist]

Code Review

This pull request introduces metrics for endpoint availability and improves JSON-RPC request duration monitoring by using a summary for percentile tracking instead of a static SLO gauge. The changes are logical and well-implemented. I've provided two suggestions for improvement: one to enhance build reproducibility by pinning the Go version in mise.toml, and another to refactor a small piece of code in internal/jsonrpc/monitor.go to be more concise and adhere to the DRY principle.

[gemini-code-assist]

The logic for recording endpoint availability is present in both the success and failure paths of the health check, leading to some code repetition. You can make this more concise and adhere to the DRY (Don't Repeat Yourself) principle by recording the availability based on the error status before checking the error, and then returning if an error occurred.

Suggested change

	if err != nil {
	// Record endpoint as unreachable
	m.RecordEndpointAvailability(chainID, evmClient.GetRPCURL(), false)
	return err
	}
	// Record endpoint as reachable
	m.RecordEndpointAvailability(chainID, evmClient.GetRPCURL(), true)
	m.RecordJsonRpcRequestDuration(chainID, duration)
	m.RecordEndpointAvailability(chainID, evmClient.GetRPCURL(), err == nil)
	if err != nil {
	return err
	}
	m.RecordJsonRpcRequestDuration(chainID, duration)

[gemini-code-assist]

Using go = "latest" can lead to non-reproducible builds. When a new version of Go is released, your build environment could change unexpectedly, potentially causing build failures or introducing subtle bugs. It is a best practice to pin dependencies and tool versions to ensure consistent builds across all environments. The go.mod file specifies version 1.24.6, so it would be best to align with that here.

Suggested change

	go = "latest"
	go = "1.24.6"