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

# ContractMetadataLogic

*thirdweb.com*

> Contract Metadata

Thirdweb's `ContractMetadata` is a contract extension for any base contracts. It lets you set a metadata URI for you contract. Additionally, `ContractMetadata` is necessary for NFT contracts that want royalties to get distributed on OpenSea.

## Methods

### contractURI

```solidity
function contractURI() external view returns (string)
```

*Returns the metadata URI of the contract.*

#### Returns

| Name | Type   | Description |
| ---- | ------ | ----------- |
| \_0  | string | undefined   |

### setContractURI

```solidity
function setContractURI(string _uri) external nonpayable
```

Lets a contract admin set the URI for contract-level metadata.

*Caller should be authorized to setup contractURI, e.g. contract admin. See {\_canSetContractURI}. Emits {ContractURIUpdated Event}.*

#### Parameters

| Name  | Type   | Description                                                  |
| ----- | ------ | ------------------------------------------------------------ |
| \_uri | string | keccak256 hash of the role. e.g. keccak256("TRANSFER\_ROLE") |

## Events

### ContractURIUpdated

```solidity
event ContractURIUpdated(string prevURI, string newURI)
```

#### Parameters

| Name    | Type   | Description |
| ------- | ------ | ----------- |
| prevURI | string | undefined   |
| newURI  | string | undefined   |