> For the complete documentation index, see [llms.txt](https://docs.stacks.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stacks.co/reference/stacks.js/stacks-transactions/types/claritytype.md).

# ClarityType

Enum representing all Clarity value type identifiers. Used for runtime type checking and serialization.

***

### Usage

```ts
import { ClarityType, isClarityType } from '@stacks/transactions';

// Type guard
if (isClarityType(value, ClarityType.UInt)) {
  console.log(value.value); // bigint
}

// Direct comparison
if (value.type === ClarityType.BoolTrue) {
  console.log('It is true');
}
```

[**Reference Link**](https://github.com/stx-labs/stacks.js/tree/main/packages/transactions/src/clarity/constants.ts)

***

### Definition

```ts
enum ClarityType {
  Int = 'int',
  UInt = 'uint',
  Buffer = 'buffer',
  BoolTrue = 'true',
  BoolFalse = 'false',
  PrincipalStandard = 'principal-standard',
  PrincipalContract = 'principal-contract',
  ResponseOk = 'ok',
  ResponseErr = 'err',
  OptionalNone = 'none',
  OptionalSome = 'some',
  List = 'list',
  Tuple = 'tuple',
  StringASCII = 'string-ascii',
  StringUTF8 = 'string-utf8',
}
```

***

### Values

| Value               | String                 | Description                                |
| ------------------- | ---------------------- | ------------------------------------------ |
| `Int`               | `'int'`                | Signed 128-bit integer                     |
| `UInt`              | `'uint'`               | Unsigned 128-bit integer                   |
| `Buffer`            | `'buffer'`             | Byte buffer                                |
| `BoolTrue`          | `'true'`               | Boolean true                               |
| `BoolFalse`         | `'false'`              | Boolean false                              |
| `PrincipalStandard` | `'principal-standard'` | Standard principal (address)               |
| `PrincipalContract` | `'principal-contract'` | Contract principal (address.contract-name) |
| `ResponseOk`        | `'ok'`                 | OK response                                |
| `ResponseErr`       | `'err'`                | Error response                             |
| `OptionalNone`      | `'none'`               | Optional none                              |
| `OptionalSome`      | `'some'`               | Optional some (wraps a value)              |
| `List`              | `'list'`               | List of values                             |
| `Tuple`             | `'tuple'`              | Tuple (key-value map)                      |
| `StringASCII`       | `'string-ascii'`       | ASCII string                               |
| `StringUTF8`        | `'string-utf8'`        | UTF-8 string                               |


---

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