> 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-upgradeable-4.5.0/token/erc721/extensions/erc721enumerableupgradeable.md).

# ERC721EnumerableUpgradeable

*This implements an optional extension of {ERC721} defined in the EIP that adds enumerability of all the token ids in the contract as well as all token ids owned by each account.*

## Methods

### approve

```solidity
function approve(address to, uint256 tokenId) external nonpayable
```

*See {IERC721-approve}.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| to      | address | undefined   |
| tokenId | uint256 | undefined   |

### balanceOf

```solidity
function balanceOf(address owner) external view returns (uint256)
```

*See {IERC721-balanceOf}.*

#### Parameters

| Name  | Type    | Description |
| ----- | ------- | ----------- |
| owner | address | undefined   |

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint256 | undefined   |

### getApproved

```solidity
function getApproved(uint256 tokenId) external view returns (address)
```

*See {IERC721-getApproved}.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| tokenId | uint256 | undefined   |

#### Returns

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

### isApprovedForAll

```solidity
function isApprovedForAll(address owner, address operator) external view returns (bool)
```

*See {IERC721-isApprovedForAll}.*

#### Parameters

| Name     | Type    | Description |
| -------- | ------- | ----------- |
| owner    | address | undefined   |
| operator | address | undefined   |

#### Returns

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

### name

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

*See {IERC721Metadata-name}.*

#### Returns

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

### ownerOf

```solidity
function ownerOf(uint256 tokenId) external view returns (address)
```

*See {IERC721-ownerOf}.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| tokenId | uint256 | undefined   |

#### Returns

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

### safeTransferFrom

```solidity
function safeTransferFrom(address from, address to, uint256 tokenId) external nonpayable
```

*See {IERC721-safeTransferFrom}.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| from    | address | undefined   |
| to      | address | undefined   |
| tokenId | uint256 | undefined   |

### safeTransferFrom

```solidity
function safeTransferFrom(address from, address to, uint256 tokenId, bytes _data) external nonpayable
```

*See {IERC721-safeTransferFrom}.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| from    | address | undefined   |
| to      | address | undefined   |
| tokenId | uint256 | undefined   |
| \_data  | bytes   | undefined   |

### setApprovalForAll

```solidity
function setApprovalForAll(address operator, bool approved) external nonpayable
```

*See {IERC721-setApprovalForAll}.*

#### Parameters

| Name     | Type    | Description |
| -------- | ------- | ----------- |
| operator | address | undefined   |
| approved | bool    | undefined   |

### 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   |

### symbol

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

*See {IERC721Metadata-symbol}.*

#### Returns

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

### tokenByIndex

```solidity
function tokenByIndex(uint256 index) external view returns (uint256)
```

*See {IERC721Enumerable-tokenByIndex}.*

#### Parameters

| Name  | Type    | Description |
| ----- | ------- | ----------- |
| index | uint256 | undefined   |

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint256 | undefined   |

### tokenOfOwnerByIndex

```solidity
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256)
```

*See {IERC721Enumerable-tokenOfOwnerByIndex}.*

#### Parameters

| Name  | Type    | Description |
| ----- | ------- | ----------- |
| owner | address | undefined   |
| index | uint256 | undefined   |

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint256 | undefined   |

### tokenURI

```solidity
function tokenURI(uint256 tokenId) external view returns (string)
```

*See {IERC721Metadata-tokenURI}.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| tokenId | uint256 | undefined   |

#### Returns

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

### totalSupply

```solidity
function totalSupply() external view returns (uint256)
```

*See {IERC721Enumerable-totalSupply}.*

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint256 | undefined   |

### transferFrom

```solidity
function transferFrom(address from, address to, uint256 tokenId) external nonpayable
```

*See {IERC721-transferFrom}.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| from    | address | undefined   |
| to      | address | undefined   |
| tokenId | uint256 | undefined   |

## Events

### Approval

```solidity
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId)
```

#### Parameters

| Name               | Type    | Description |
| ------------------ | ------- | ----------- |
| owner `indexed`    | address | undefined   |
| approved `indexed` | address | undefined   |
| tokenId `indexed`  | uint256 | undefined   |

### ApprovalForAll

```solidity
event ApprovalForAll(address indexed owner, address indexed operator, bool approved)
```

#### Parameters

| Name               | Type    | Description |
| ------------------ | ------- | ----------- |
| owner `indexed`    | address | undefined   |
| operator `indexed` | address | undefined   |
| approved           | bool    | undefined   |

### Transfer

```solidity
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId)
```

#### Parameters

| Name              | Type    | Description |
| ----------------- | ------- | ----------- |
| from `indexed`    | address | undefined   |
| to `indexed`      | address | undefined   |
| tokenId `indexed` | uint256 | undefined   |


---

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