# @kodex-data/cid-prototypes

`yarn add @kodex-data/cid-prototypes` or `npm install @kodex-data/cid-prototypes`

## Documentation for CID parsing and manipulation functions

This module exports several functions and interfaces related to parsing, formatting, and manipulating CID (Content ID) instances.

```typescript
import '@kodex-data/cid-prototypes'
import { CID } from 'multiformats'

const cids = 'bafybeih3qajng5kyjv4apiiughyjhflfc2kn747ggujq7d6ulkritfqx4e'.getCIDs()
const fromHEX = `f01701220fb8012d375584d7807a11431f09395651694dff3e635130f8fd45aa2899617e1`.parseCID()
const toV0 = CID.parse(cids.v0)

console.log(toV0.toV1().equals(fromHEX), cids.v0)
```

### Exported Constants

* `VERSION`: A constant string representing the version of this module.

### Exported Interfaces

* `CIDs`: An interface representing the different versions of a CID. It contains the following properties:
  * `v0`: A string representing the version 0 CID.
  * `v1`: A string representing the version 1 CID.
  * `hex`: A string representing the hexadecimal version of a CID.

### Global Extensions to the String Prototype

This module extends the global `String` prototype with the following functions:

* `parseCID(version?: CIDVersions): CID`: A function that parses a string as a CID instance. If the `version` parameter is provided, it will parse the string as the specified CID version.
* `isCID(version?: CIDVersions): boolean`: A function that checks whether a string is a valid CID. If the `version` parameter is provided, it will check whether the string is a valid CID of the specified version.
* `getCIDVersion(): CIDVersions`: A function that returns the version of a CID as a string.
* `getCIDs(): CIDs`: A function that formats a CID string as all possible versions of the CID.
* `findCIDs(parse?: boolean): string[] | CID[]`: A function that finds all CIDs in a given string. If the `parse` parameter is `true`, it will return an array of CID instances. Otherwise, it will return an array of strings representing the found CIDs.

### Multiformats CID Extensions

This module extends the `CID` interface from the `multiformats` module with the following function:

* `getCIDs(): CIDs`: A function that formats a CID as all possible versions of the CID.

### Exported Functions

This module also exports several utility functions:

* `CID_V1`: A regular expression that matches version 1 CIDs.
* `CID_V0`: A regular expression that matches version 0 CIDs.
* `matcher(regex: RegExp, txt: string): string[]`: A function that returns an array of strings matching the given regular expression.
* `extractIpfsHashes(uri: string): string[]`: A function that extracts IPFS hashes from a URI string.
* `extractIpfsHash(uri: string): string`: A function that extracts the first IPFS hash from a URI string.
* `findCIDs(txt: string): string[]`: A function that finds all CIDs in a given string.
* `isHEX(input: string): boolean`: A function that checks whether a string is a valid hexadecimal string.
* `toHEX(input: string): string`: A function that converts a string to hexadecimal format.
* `fromHEX(input: string): string`: A function that converts a hexadecimal string to regular string format.
* `isV0(query: string): boolean`: A function that checks whether a string is a version 0 CID.
* `isV1(query: string): boolean`: A function that checks whether a string is a version 1 CID.
* `isHexCID(input: string): boolean`: A function that checks whether a string is a valid hexadecimal CID.
* `isCID(input: string, version?: CIDVersions): boolean`: A function that checks whether a string is a valid CID. If the `version` parameter is provided, it will check whether the string is a valid CID of the specified version.
* `getCIDVersion(input: string): CIDVersions`: A function that returns the version of a CID string as a string.