> For the complete documentation index, see [llms.txt](https://contracts.synapseprotocol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://contracts.synapseprotocol.com/elin/contracts-4.5.0/utils/introspection/erc165.md).

# ERC165

*Implementation of the {IERC165} interface. Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check for the additional interface id that will be supported. For example: `solidity function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); }` Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.*

## Methods

### supportsInterface

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

*See {IERC165-supportsInterface}.*

#### Parameters

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

#### Returns

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


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