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# GOOGLE SUMMER OF CODE'S PROJECTS FOR 2025
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1.
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1. Rewrite metrics-lib in Rust
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Mentor: [Hiro](https://gitlab.torproject.org/hiro), [Sarthik](https://gitlab.torproject.org/sarthikg)
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Hours required: 350 hours
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Skills required: Rust + some Java
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Expected outcome: A library to process Tor network documents in Rust is available
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Difficulty: medium
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Background
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Tor Metrics Library is a Java library to fetch and parse Tor descriptors.
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Metrics lib provides an API in JAVA allowing processing Tor network data from the [CollecTor](https://collector.torproject.org) service for statistical analysis and for building services and applications.
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Proposal
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The metrics pipeline is being restructured and is slowly moving away from a mostly JAVA codebase to a rust and python tool belt.
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This project would involve a complete re-implementation of the Tor metrics library in Rust.
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[Metrics-lib](https://metrics.torproject.org/metrics-lib.html) is a JAVA based API that is used to parse and validate Tor network documents. The rust rewrite should provide the same parsing and validation functionalities provided by metrics-lib and in addition allow exporting of the documents in some external storage, like parquet files to be saved into object storage or a table on a postgresql database.
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Resources:
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https://gitlab.torproject.org/tpo/network-health/metrics/library
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https://metrics.torproject.org/metrics-lib.html
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https://gitlab.torproject.org/tpo/network-health/metrics/descriptorParser/
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https://gitlab.torproject.org/tpo/network-health/team/-/wikis/metrics/development/home
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2.
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