Carbon Protocol V3 on Starknet

Leading Web3 Infrastructure to Manage Real-World Assets (RWA)

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About

Carbon Protocol V3 is an open-source smart contract framework built on Starknet, designed for the tokenization, tracking, and lifecycle management of carbon credits. This version introduces a granular representation of carbon credits using the ERC‑1155 standard, enabling one token per credit per vintage, with native support for rebasable balances and FIFO offsetting via Merkle proofs.

Protocol V3 addresses key limitations of earlier versions by offering:

Precise accounting per vintage, improving auditability and traceability.

Rebase mechanisms to automatically reflect post-audit adjustments without altering millions of individual balances.

Low-cost, scalable operations thanks to gas-efficient smart contract design on Starknet.

By combining trust-minimized infrastructure with fine-grained asset modeling, Carbon Protocol V3 sets a new standard for transparent and interoperable carbon market infrastructure.

To learn more about key topics:

• Carbon-Protocol v2
• EIP-1155
• EIP-6551

Project setup

📦 Requirements

• scarb

⛏️ Compile

scarb build

💄 Code style

scarb fmt

🌡️ Test

scarb test

Roadmap

See the open issues for a list of proposed features (and known issues).

Support

Reach out to the maintainer at one of the following places:

• GitHub Discussions
• Discord
• Telegram

Project Assistance

If you want to say thank you or/and support active development:

• Add a GitHub Star to the project.
• Write interesting articles about the project on Dev.to, Medium, or your personal blog.

Together, we can make Carbon Protocol V3 better!

Contributing

First off, thanks for taking the time to contribute! Contributions are what make the open-source community such an amazing place to learn, inspire, and create. Any contributions you make will benefit everybody else and are greatly appreciated.

Please read our contribution guidelines, and thank you for being involved!

Authors & Contributors

For a full list of all authors and contributors, see the contributors page.

License

Carbon Protocol V3 follows good practices of security, but 100% security cannot be assured. Carbon Protocol V3 is in development phase and provided "as is" without any warranty.

This project is licensed under the Apache License, Version 2.0. See LICENSE for more information.

Contributors ✨

Thanks go to these wonderful people (emoji key):

Ainur 💻	Trunks @ Carbonable 💻	bitfalt 💻	Axel Izsak 💻	ADR!AN 💻	0xK2 💻	Shivam kumar 💻
Wolf 🐛	Emmanuel Soetan 💻	Yusuf Habib 💻	Lindsay Morales 💻	Kléio 📖	sBaki 💻

This project follows the all-contributors specification. Contributions of any kind are welcome!