> For the complete documentation index, see [llms.txt](https://docs.mezzanine.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mezzanine.xyz/smart-contracts/source-code/core/base/credentialed.md).

# Credentialed

[Git Source](https://github.com/EntreDevelopers-Lab-Inc/Mezz-Companies/blob/f7a3e84e3dd5bb33c4bd7f77283983f9e8ba20b2/src/core/base/Credentialed.sol)

**Inherits:** ERC165Upgradeable, ICredentialed

**Author:** Daniel Yamagata & Naveen Ailawadi

A base contract that requires implementers to define a core identifier and version

*Contracts must be credentialed to be set in the Mezz Migrator*

## Functions

### coreId

Returns the coreId of the implementation as a bytes32

*The core ID is the keccak256 hash of the contract name followed by a version under the following syntax: "mezzanine.coreId.ContractName.vX" For example, the core ID of the 2nd version of the Treasury would be the following: keccak256(abi.encodePacked("mezzanine.coreId.Treasury.v2"))*

```solidity
function coreId() public pure virtual returns (bytes32);
```

### version

Returns the version of the implementation as a uint256

```solidity
function version() public pure virtual returns (uint256);
```

### supportsInterface

*ERC165 support*

```solidity
function supportsInterface(bytes4 interfaceId)
    public
    view
    virtual
    override(ERC165Upgradeable, IERC165)
    returns (bool);
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.mezzanine.xyz/smart-contracts/source-code/core/base/credentialed.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.