# IERC721

*Interface for ERC721 tokens*

## balanceOf

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

## ownerOf

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

## transferFrom

```solidity
function transferFrom(address, address, uint256) external
```

## tokenOfOwnerByIndex

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