> For the complete documentation index, see [llms.txt](https://docs.okkult.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.okkult.io/developers/smart-contracts.md).

# Smart contracts

## Smart contracts

Okkult uses Solidity `0.8.20` contracts with OpenZeppelin `v5`.

The protocol separates the shielded pool, verifier contracts, and integration adapters.

### Main contracts

| Contract           | Purpose                                            |
| ------------------ | -------------------------------------------------- |
| `OkkultShield v4`  | Main shielded pool contract                        |
| `ShieldVerifier`   | Verifies shielding proofs                          |
| `UnshieldVerifier` | Verifies withdrawal proofs                         |
| `TransferVerifier` | Verifies private transfer proofs                   |
| `RailgunAdapter`   | Connects Okkult Shield to Railgun-compatible flows |

### Operational addresses

| Role               | Purpose                                      |
| ------------------ | -------------------------------------------- |
| `Relay / Treasury` | Receives treasury and relay funds on mainnet |

### Notes

Use the deployed address list for production mainnet addresses and ENS names.

### Next Steps

* [Deployed addresses](/developers/deployed-addresses.md)
* [Integration guides](/developers/integration-guides.md)
* [Architecture](/security/architecture.md)


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