> For the complete documentation index, see [llms.txt](https://guides.regen.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.regen.network/guides/regen-network/regen-ledger/additional-resources.md).

# Additional Resources

Deep dive into **Regen Ledger v4.0 upgrade** with this blog, "[Bringing full eco-credit lifecycles on-chain with Regen Ledger v4.0](https://medium.com/regen-network/bringing-the-full-eco-credit-lifecycle-on-chain-with-regen-ledger-v4-0-183ca96ea7c7)". 

Explore **Regen Ledger** on its [GitHub](https://github.com/regen-network/regen-ledger/blob/master/README.md). 

Learn more about the [Nature-Carbon Tonne ](https://docs.toucan.earth/protocol/pool/pool-parties/nct-pool-party-report)the Toucan Bridge will be moving from Polygon to Regen Network's blockchain.