Summary of Changes

Hello @roderik, 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 introduces a significant feature allowing users to provide pre-existing Besu network artifacts instead of relying on the chart's bootstrapper job to generate them. This enhances flexibility for deploying Besu networks by enabling the use of custom or externally managed network configurations, thereby streamlining deployments where artifact generation is handled outside the Helm chart.

Highlights

• External Artifact Sourcing: Introduced a new configuration option (artifacts.source) to allow users to choose between generating network artifacts or providing them externally.
• Kubernetes Resource Generation: Added support for supplying external Besu network artifacts (genesis, static nodes, validator keys, faucet details) via Helm values, which are then rendered into Kubernetes ConfigMaps and Secrets.
• Conditional Bootstrapper Job: Modified the bootstrapper job to be conditionally disabled when external artifacts are provided, preventing redundant generation and streamlining deployments.
• Documentation and Configuration Updates: Updated the README.md and values.yaml files to clearly document the new artifacts.source and artifacts.external configuration options and their usage.

Hey there - I've reviewed your changes and they look great!

Please address the comments from this code review:

## Individual Comments

### Comment 1
<location> `charts/network/charts/network-bootstrapper/templates/external-artifacts.yaml:10` </location>
<code_context>
+{{- $validators := get $external "validators" -}}
+{{- $faucet := get $external "faucet" -}}
+{{- if not $genesis }}{{ fail "artifacts.external.genesis must be provided when artifacts.source is 'external'." }}{{- end }}
+{{- if not $staticNodes }}{{ fail "artifacts.external.staticNodes must include at least one enode when artifacts.source is 'external'." }}{{- end }}
+{{- if not $validators }}{{ fail "artifacts.external.validators must include at least one entry when artifacts.source is 'external'." }}{{- end }}
+{{- if not ($faucet.address) }}{{ fail "artifacts.external.faucet.address must be set when artifacts.source is 'external'." }}{{- end }}
</code_context>

<issue_to_address>
**issue:** The staticNodes check will fail if the value is an empty list.

Since an empty list is considered falsy, the current check may fail even when staticNodes is present but empty. Use a length check to ensure the list contains at least one enode.
</issue_to_address>

Code Review

This pull request introduces a valuable feature to allow sourcing Besu network artifacts externally, which increases the flexibility of the Helm chart. The changes are well-structured, with a new template for external artifacts, conditional rendering of the bootstrapper job, and corresponding updates to values.yaml and the README.md.

My review focuses on the new external-artifacts.yaml template. I've identified a couple of issues in the validation logic that could lead to incorrect behavior or template rendering errors. Specifically, the checks for empty lists/objects are not effective, and there's a risk of a nil pointer error when handling the faucet configuration. I've provided suggestions to make the validation more robust.

Once these points are addressed, the implementation will be solid.