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

# Auxiliary Contracts

* [**DimoAccessControl**](/protocol/identity-protocol/auxiliary-contracts/access-control.md): management of function access and roles.
* [**AdLicenseValidator**](/protocol/identity-protocol/auxiliary-contracts/adlicensevalidator.md): validates manufacturer license for minting aftermarket devices.
* [**Eip712Checker**](#eip712checker): signature verification.
* [**Mapper**](/protocol/identity-protocol/auxiliary-contracts/mapper.md): helps to establish links between nodes.