Add anonymizer property to IpAddress interface

[oschwald]

Summary

• Added AnonymizerRecord import from @maxmind/geoip2-node
• Added readonly anonymizer?: AnonymizerRecord to IpAddress interface
• Updated test fixtures and added test assertions

Test plan

• All 174 tests pass

🤖 Generated with Claude Code

[gemini-code-assist]

Summary of Changes

Hello @oschwald, 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 the capability to access anonymizer information for IP addresses within the system. By adding a new anonymizer property to the IpAddress interface, it allows consumers of the GeoIP2 Insights web service to retrieve data related to anonymizing services, such as VPNs or proxies, directly from the IP address object. This enhancement provides more comprehensive IP intelligence, which is particularly useful for fraud detection and security applications.

Highlights

• IpAddress Interface Enhancement: The IpAddress interface has been extended to include an optional anonymizer property of type AnonymizerRecord. This property provides detailed information about whether an IP address is associated with an anonymizing service, such as its type, confidence level, and provider.
• Data Fixture Update: The insights.json test fixture has been updated to include sample anonymizer data, ensuring that the new property can be properly tested and validated with realistic values.
• Test Coverage Expansion: New test assertions have been added to insights.spec.ts to verify the correct parsing and accessibility of the anonymizer property and its sub-properties, including handling cases where the anonymizer data might be absent from the response.

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[gemini-code-assist]

Code Review

This pull request adds support for the anonymizer property on the IpAddress interface, which provides data about whether an IP is associated with an anonymizing service. The changes include updating the IpAddress interface, adding test data to fixtures, and implementing tests to verify the new property. The implementation correctly leverages the underlying @maxmind/geoip2-node package. My feedback includes a suggestion to improve test readability.