Proof of Contribution

The ranking algorithm for open-source software

Proof of Contribution measures the value, position, and impact of open-source software projects. The ranking algorithm is engineered to bring fairness and equitable rewards to the OSS ecosystem.

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Modeling the OSS ecosystem as a graph

Proof of Contribution builds on Google’s PageRank to model OSS packages and their versions as nodes in a graph. The algorithm continually evaluates how the open-source software graph changes over time.

The full graph contains the data of all supported package managers, and the interconnections of the projects inside them, into the tea Protocol.

Proof of Contribution algorithm flows to projects from each of its dependents, and dynamically assigns a teaRank score daily.

teaRank scores projects from 0 to 100, and allows the tea Protocol to calculate and distribute rewards based on the project’s impact.

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technical details
of teaRank

Enables Dynamic Ranking

Just like Total Value Locked for DeFi, Proof of Contribution supports a powerful performance indicator—teaRank. Each OSS project's teaRank is adjusted as the project and open-source software ecosystem continually evolve.

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Measuring Dependency in Open Source

How does an open-source project shape the ecosystem? Proof of Contribution measures impact through CHAI’s global dependency graph, mapping a project’s role—whether as a dependency or utility—across supported repositories.

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Anti-Spam

Proof of Contribution protects open source by measuring merit, filtering spam, and ensuring value flows only to impactful projects and contributors. Built on over a year of testnet defenses, it keeps rewards transparent and trusted—paving the way for a decentralized, permissionless network that sustains open source.

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