# BasicInfo

#### Check DID Name

Check whether a DID name has been claimed or not.

```solidity
function didClaimed(string memory did) public view returns (bool);
```

* did: DID name

#### Verify DID Format

To verify the DID format, ensure that the DID name has a length between 5 and 54 characters, and only contains the characters 0-9 and lowercase letters a-z.

```solidity
function verifyDIDFormat(string memory did) public pure returns (bool);
```

* did: DID name

#### Check address

Check whether an address has been claimed or not.

```solidity
function addrClaimed(address addr) public view returns(bool);
```

* addr: user address

#### Get DID

Retrieve the DID name by token id.

```solidity
function tokenId2Did(uint256 tokenId) public view returns (string memory);
```

* tokenId: token id

#### Get DID tokenId

Retrieve the token id by DID name.

```solidity
function did2TokenId(string memory did) public view returns (uint256);
```

* did: DID name

#### Get issuer address

Retrieve the issuer address by DeedGrain contract address.

```solidity
function deedGrainAddrToIssur(address dgAddr) public view returns(address);
```

* dgAddr: DeedGrain contract address

#### Get all authorization addresses

Retrieve all authorization addresses for specific DID.

```solidity
function getAuthorizedAddrs(uint256 tokenId) public view returns (address[] memory);
```

* tokenId: DID token id

#### Check if address authorized

Check whether a DID has been authorized to the address or not.

```solidity
function isAddrAuthorized(uint256 tokenId, address addr) public view returns (bool);
```

* tokenId: DID token id
* addr: authorization address


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.hashkey.id/protocol/contract-api-reference/basicinfo.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.