> ## 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.

> Auto-generated TypeScript API documentation from source code

# Generated API Reference

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

***

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

# primitives/Permit

## Namespaces

* [KnownTokens](namespaces/KnownTokens.mdx)

## Interfaces

### PermitDomainType

Defined in: [src/primitives/Permit/PermitType.ts:19](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L19)

EIP-712 Domain for Permit signatures

#### Properties

##### chainId

> `readonly` **chainId**: [`ChainIdType`](../ChainId.mdx#chainidtype)

Defined in: [src/primitives/Permit/PermitType.ts:22](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L22)

##### name

> `readonly` **name**: `string`

Defined in: [src/primitives/Permit/PermitType.ts:20](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L20)

##### verifyingContract

> `readonly` **verifyingContract**: [`AddressType`](../Address.mdx#addresstype)

Defined in: [src/primitives/Permit/PermitType.ts:23](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L23)

##### version

> `readonly` **version**: `string`

Defined in: [src/primitives/Permit/PermitType.ts:21](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L21)

***

### PermitType

Defined in: [src/primitives/Permit/PermitType.ts:8](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L8)

EIP-2612 Permit message structure

#### Properties

##### deadline

> `readonly` **deadline**: [`Type`](../Uint.mdx#type)

Defined in: [src/primitives/Permit/PermitType.ts:13](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L13)

##### nonce

> `readonly` **nonce**: [`Type`](../Uint.mdx#type)

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

##### owner

> `readonly` **owner**: [`AddressType`](../Address.mdx#addresstype)

Defined in: [src/primitives/Permit/PermitType.ts:9](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L9)

##### spender

> `readonly` **spender**: [`AddressType`](../Address.mdx#addresstype)

Defined in: [src/primitives/Permit/PermitType.ts:10](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L10)

##### value

> `readonly` **value**: [`Type`](../Uint.mdx#type)

Defined in: [src/primitives/Permit/PermitType.ts:11](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/PermitType.ts#L11)

## Variables

### PERMIT\_TYPES

> `const` **PERMIT\_TYPES**: `object`

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

EIP-2612 Permit type definition for EIP-712

#### Type Declaration

##### Permit

> **Permit**: `object`\[]

## Functions

### createPermitSignature()

> **createPermitSignature**(`permit`, `domain`, `privateKey`): `Uint8Array`\<`ArrayBufferLike`>

Defined in: [src/primitives/Permit/createPermitSignature.js:37](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/createPermitSignature.js#L37)

Creates an EIP-2612 permit signature

#### Parameters

##### permit

[`PermitType`](#permittype)

Permit message

##### domain

[`PermitDomainType`](#permitdomaintype)

EIP-712 domain

##### privateKey

`Uint8Array`\<`ArrayBufferLike`>

Private key (32 bytes)

#### Returns

`Uint8Array`\<`ArrayBufferLike`>

Compact signature (64 bytes + recovery id)

#### Example

```typescript theme={null}
import * as Permit from './primitives/Permit/index.js';
import * as Address from './primitives/Address/index.js';
import * as Uint256 from './primitives/Uint256/index.js';

const permit = {
  owner: Address.fromHex('0x...'),
  spender: Address.fromHex('0x...'),
  value: Uint256.fromBigInt(1000000n),
  nonce: Uint256.fromBigInt(0n),
  deadline: Uint256.fromBigInt(1234567890n),
};

const domain = {
  name: 'USD Coin',
  version: '2',
  chainId: 1,
  verifyingContract: Address.fromHex('0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48'),
};

const signature = Permit.createPermitSignature(permit, domain, privateKey);
```

***

### verifyPermit()

> **verifyPermit**(`permit`, `signature`, `domain`): `boolean`

Defined in: [src/primitives/Permit/verifyPermit.js:21](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Permit/verifyPermit.js#L21)

Verifies an EIP-2612 permit signature

#### Parameters

##### permit

[`PermitType`](#permittype)

Permit message

##### signature

`Uint8Array`\<`ArrayBufferLike`>

Compact signature (64 bytes + recovery id)

##### domain

[`PermitDomainType`](#permitdomaintype)

EIP-712 domain

#### Returns

`boolean`

True if signature is valid

#### Example

```typescript theme={null}
import * as Permit from './primitives/Permit/index.js';

const isValid = Permit.verifyPermit(permit, signature, domain);
```