> For the complete documentation index, see [llms.txt](https://docs.fringe.fi/smart-contract-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fringe.fi/smart-contract-documentation/openzeppelin/contracts/interfaces/ierc2981.md).

# IERC 2981

*Interface for the NFT Royalty Standard*

## Methods

### royaltyInfo

```solidity
function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount)
```

*Called with the sale price to determine how much royalty is owed and to whom.*

#### Parameters

| Name      | Type    | Description                                              |
| --------- | ------- | -------------------------------------------------------- |
| tokenId   | uint256 | - the NFT asset queried for royalty information          |
| salePrice | uint256 | - the sale price of the NFT asset specified by `tokenId` |

#### Returns

| Name          | Type    | Description                                         |
| ------------- | ------- | --------------------------------------------------- |
| receiver      | address | - address of who should be sent the royalty payment |
| royaltyAmount | uint256 | - the royalty payment amount for `salePrice`        |

### supportsInterface

```solidity
function supportsInterface(bytes4 interfaceId) external view returns (bool)
```

*Returns true if this contract implements the interface defined by `interfaceId`. See the corresponding <https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified\\[EIP> section] to learn more about how these ids are created. This function call must use less than 30 000 gas.*

#### Parameters

| Name        | Type   | Description |
| ----------- | ------ | ----------- |
| interfaceId | bytes4 | undefined   |

#### Returns

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