> For the complete documentation index, see [llms.txt](https://docs.alldomains.id/protocol/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.alldomains.id/protocol/hybrid-domain-names-.com-on-solana/on-chain-mechanics.md).

# On-Chain Mechanics

### What is stored on-chain

The on-chain metadata includes:

* Ownership (wallet)
* Unique domain identifier
* Expiry and renewal state
* Metadata pointers (including name server records)

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### Ownership history

Ownership history is publicly visible on-chain.

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### Synchronization

Web2 and Web3 records are always synchronized.

It is not possible for ownership or renewal state to become out of sync.

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