> ## Documentation Index
> Fetch the complete documentation index at: https://voltaire.tevm.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# primitives/DomainSeparator

> Auto-generated API documentation

[**@tevm/voltaire**](../index.mdx)

***

[@tevm/voltaire](../index.mdx) / primitives/DomainSeparator

# primitives/DomainSeparator

## Classes

### InvalidDomainSeparatorLengthError

Defined in: [src/primitives/DomainSeparator/errors.js:4](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/errors.js#L4)

Error thrown when DomainSeparator length is invalid

#### Extends

* `Error`

#### Constructors

##### Constructor

> **new InvalidDomainSeparatorLengthError**(`message`, `context`): [`InvalidDomainSeparatorLengthError`](#invaliddomainseparatorlengtherror)

Defined in: [src/primitives/DomainSeparator/errors.js:9](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/errors.js#L9)

###### Parameters

###### message

`string`

###### context

`Record`\<`string`, `unknown`>

###### Returns

[`InvalidDomainSeparatorLengthError`](#invaliddomainseparatorlengtherror)

###### Overrides

`Error.constructor`

#### Properties

##### context

> **context**: `Record`\<`string`, `unknown`>

Defined in: [src/primitives/DomainSeparator/errors.js:12](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/errors.js#L12)

##### name

> **name**: `string`

Defined in: [src/primitives/DomainSeparator/errors.js:11](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/errors.js#L11)

###### Inherited from

`Error.name`

## Type Aliases

### DomainSeparatorType

> **DomainSeparatorType** = `Uint8Array` & `object`

Defined in: [src/primitives/DomainSeparator/DomainSeparatorType.ts:7](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/DomainSeparatorType.ts#L7)

EIP-712 Domain Separator - keccak256 hash of domain separator
Used in EIP-712 signature verification for domain separation

#### Type Declaration

##### \[brand]

> `readonly` **\[brand]**: `"DomainSeparator"`

##### length

> `readonly` **length**: `32`

## Variables

### SIZE

> `const` **SIZE**: `32` = `32`

Defined in: [src/primitives/DomainSeparator/DomainSeparatorType.ts:12](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/DomainSeparatorType.ts#L12)

## Functions

### \_equals()

> **\_equals**(`a`, `b`): `boolean`

Defined in: [src/primitives/DomainSeparator/equals.js:12](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/equals.js#L12)

Check if two DomainSeparators are equal

#### Parameters

##### a

[`DomainSeparatorType`](#domainseparatortype)

First DomainSeparator

##### b

[`DomainSeparatorType`](#domainseparatortype)

Second DomainSeparator

#### Returns

`boolean`

True if equal

#### Example

```javascript theme={null}
const equal = DomainSeparator.equals(sep1, sep2);
```

***

### \_from()

> **\_from**(`value`): [`DomainSeparatorType`](#domainseparatortype)

Defined in: [src/primitives/DomainSeparator/from.js:17](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/from.js#L17)

Create DomainSeparator from string or bytes

#### Parameters

##### value

Hex string with optional 0x prefix or Uint8Array

`string` | `Uint8Array`\<`ArrayBufferLike`>

#### Returns

[`DomainSeparatorType`](#domainseparatortype)

DomainSeparator bytes

#### Throws

If input is invalid or wrong length

#### Example

```javascript theme={null}
import * as DomainSeparator from './primitives/DomainSeparator/index.js';
const sep = DomainSeparator.from('0x1234...');
const sep2 = DomainSeparator.from(new Uint8Array(32));
```

***

### \_fromBytes()

> **\_fromBytes**(`bytes`): [`DomainSeparatorType`](#domainseparatortype)

Defined in: [src/primitives/DomainSeparator/fromBytes.js:14](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/fromBytes.js#L14)

Create DomainSeparator from bytes

#### Parameters

##### bytes

`Uint8Array`\<`ArrayBufferLike`>

32-byte array

#### Returns

[`DomainSeparatorType`](#domainseparatortype)

DomainSeparator

#### Throws

If bytes length is not 32

#### Example

```javascript theme={null}
const sep = DomainSeparator.fromBytes(new Uint8Array(32));
```

***

### \_fromHex()

> **\_fromHex**(`hex`): [`DomainSeparatorType`](#domainseparatortype)

Defined in: [src/primitives/DomainSeparator/fromHex.js:15](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/fromHex.js#L15)

Create DomainSeparator from hex string

#### Parameters

##### hex

`string`

Hex string with optional 0x prefix (must be 66 chars with 0x or 64 without)

#### Returns

[`DomainSeparatorType`](#domainseparatortype)

DomainSeparator

#### Throws

If hex string is invalid or wrong length

#### Example

```javascript theme={null}
const sep = DomainSeparator.fromHex('0x1234...');
```

***

### \_toHex()

> **\_toHex**(`separator`): `string`

Defined in: [src/primitives/DomainSeparator/toHex.js:14](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/toHex.js#L14)

Convert DomainSeparator to hex string with 0x prefix

#### Parameters

##### separator

[`DomainSeparatorType`](#domainseparatortype)

DomainSeparator

#### Returns

`string`

Hex string with 0x prefix

#### Example

```javascript theme={null}
const hex = DomainSeparator.toHex(separator);
console.log(hex); // '0x1234...'
```

***

### equals()

> **equals**(`a`, `b`): `boolean`

Defined in: [src/primitives/DomainSeparator/index.ts:42](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/index.ts#L42)

#### Parameters

##### a

[`DomainSeparatorType`](#domainseparatortype)

##### b

[`DomainSeparatorType`](#domainseparatortype)

#### Returns

`boolean`

***

### from()

> **from**(`value`): [`DomainSeparatorType`](#domainseparatortype)

Defined in: [src/primitives/DomainSeparator/index.ts:18](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/index.ts#L18)

#### Parameters

##### value

`string` | `Uint8Array`\<`ArrayBufferLike`>

#### Returns

[`DomainSeparatorType`](#domainseparatortype)

***

### fromBytes()

> **fromBytes**(`bytes`): [`DomainSeparatorType`](#domainseparatortype)

Defined in: [src/primitives/DomainSeparator/index.ts:24](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/index.ts#L24)

#### Parameters

##### bytes

`Uint8Array`

#### Returns

[`DomainSeparatorType`](#domainseparatortype)

***

### fromHex()

> **fromHex**(`hex`): [`DomainSeparatorType`](#domainseparatortype)

Defined in: [src/primitives/DomainSeparator/index.ts:30](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/index.ts#L30)

#### Parameters

##### hex

`string`

#### Returns

[`DomainSeparatorType`](#domainseparatortype)

***

### toHex()

> **toHex**(`separator`): `string`

Defined in: [src/primitives/DomainSeparator/index.ts:36](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/DomainSeparator/index.ts#L36)

#### Parameters

##### separator

[`DomainSeparatorType`](#domainseparatortype)

#### Returns

`string`