# IERC721Expert

## Interface Description

License: MIT

##

```solidity
interface IERC721Expert is IERC721Upgradeable
```

The ERC721 token that implements experts functionality, follows EIP-5484

## Enums info

### BurnAuth

```solidity
enum BurnAuth {
	 IssuerOnly,
	 OwnerOnly,
	 Both,
	 Neither
}
```

## Events info

### Issued

```solidity
event Issued(address indexed from, address indexed to, uint256 indexed tokenId, IERC721Expert.BurnAuth burnAuth)
```

Emitted when a soulbound token is issued.

Parameters:

| Name     | Type                        | Description                |
| -------- | --------------------------- | -------------------------- |
| from     | address                     | The issuer                 |
| to       | address                     | The receiver               |
| tokenId  | uint256                     | The id of the issued token |
| burnAuth | enum IERC721Expert.BurnAuth | the BurnAuth struct        |

### TagsAdded

```solidity
event TagsAdded(uint256 indexed tokenId, string[] tags)
```

Emitted when tags are added to the SBT

Parameters:

| Name    | Type      | Description                        |
| ------- | --------- | ---------------------------------- |
| tokenId | uint256   | the token where the tags are added |
| tags    | string\[] | the list of tags                   |

## Functions info

### burn (0x89afcb44)

```solidity
function burn(address from) external
```

The function to burn the token

Parameters:

| Name | Type    | Description                                |
| ---- | ------- | ------------------------------------------ |
| from | address | the address to burn from (1 to 1 relation) |

### isExpert (0x76c535ae)

```solidity
function isExpert(address expert) external view returns (bool)
```

The function to check of a user is an expert

Parameters:

| Name   | Type    | Description       |
| ------ | ------- | ----------------- |
| expert | address | the user to check |

Return values:

| Name | Type | Description               |
| ---- | ---- | ------------------------- |
| \[0] | bool | true if user is an expert |

### getIdByExpert (0x6047fb89)

```solidity
function getIdByExpert(address expert) external view returns (uint256)
```

The function to get the SBT id of an expert

Parameters:

| Name   | Type    | Description                   |
| ------ | ------- | ----------------------------- |
| expert | address | the user to get the SBT id of |

Return values:

| Name | Type    | Description        |
| ---- | ------- | ------------------ |
| \[0] | uint256 | SBT id of the user |

### burnAuth (0x0489b56f)

```solidity
function burnAuth(
    uint256 tokenId
) external view returns (IERC721Expert.BurnAuth)
```

provides burn authorization of the token id

Parameters:

| Name    | Type    | Description                |
| ------- | ------- | -------------------------- |
| tokenId | uint256 | The identifier for a token |

Return values:

| Name | Type                        | Description |
| ---- | --------------------------- | ----------- |
| \[0] | enum IERC721Expert.BurnAuth | the auth    |