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

# Chain

> Protobuf class Chain generated from WAProto.

Defined in: [WAProto/index.d.ts:10923](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10923)

## Implements

* [`IChain`](/proto-reference/SessionStructure/interfaces/IChain)

## Constructors

### new Chain()

> **new Chain**(`p`?): [`Chain`](/proto-reference/SessionStructure/classes/Chain)

Defined in: [WAProto/index.d.ts:10924](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10924)

#### Parameters

##### p?

[`IChain`](/proto-reference/SessionStructure/interfaces/IChain)

#### Returns

[`Chain`](/proto-reference/SessionStructure/classes/Chain)

## Properties

### chainKey?

> `optional` **chainKey**: `null` | [`IChainKey`](/proto-reference/SessionStructure/Chain/interfaces/IChainKey)

Defined in: [WAProto/index.d.ts:10927](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10927)

#### Implementation of

[`IChain`](/proto-reference/SessionStructure/interfaces/IChain).[`chainKey`](/proto-reference/SessionStructure/interfaces/IChain#chainkey)

***

### messageKeys

> **messageKeys**: [`IMessageKey`](/proto-reference/SessionStructure/Chain/interfaces/IMessageKey)\[]

Defined in: [WAProto/index.d.ts:10928](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10928)

#### Implementation of

[`IChain`](/proto-reference/SessionStructure/interfaces/IChain).[`messageKeys`](/proto-reference/SessionStructure/interfaces/IChain#messagekeys)

***

### senderRatchetKey?

> `optional` **senderRatchetKey**: `null` | `Uint8Array`\<`ArrayBufferLike`>

Defined in: [WAProto/index.d.ts:10925](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10925)

#### Implementation of

[`IChain`](/proto-reference/SessionStructure/interfaces/IChain).[`senderRatchetKey`](/proto-reference/SessionStructure/interfaces/IChain#senderratchetkey)

***

### senderRatchetKeyPrivate?

> `optional` **senderRatchetKeyPrivate**: `null` | `Uint8Array`\<`ArrayBufferLike`>

Defined in: [WAProto/index.d.ts:10926](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10926)

#### Implementation of

[`IChain`](/proto-reference/SessionStructure/interfaces/IChain).[`senderRatchetKeyPrivate`](/proto-reference/SessionStructure/interfaces/IChain#senderratchetkeyprivate)

## Methods

### create()

> `static` **create**(`properties`?): [`Chain`](/proto-reference/SessionStructure/classes/Chain)

Defined in: [WAProto/index.d.ts:10929](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10929)

#### Parameters

##### properties?

[`IChain`](/proto-reference/SessionStructure/interfaces/IChain)

#### Returns

[`Chain`](/proto-reference/SessionStructure/classes/Chain)

***

### decode()

> `static` **decode**(`r`, `l`?): [`Chain`](/proto-reference/SessionStructure/classes/Chain)

Defined in: [WAProto/index.d.ts:10931](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10931)

#### Parameters

##### r

`Uint8Array`\<`ArrayBufferLike`> | `Reader`

##### l?

`number`

#### Returns

[`Chain`](/proto-reference/SessionStructure/classes/Chain)

***

### encode()

> `static` **encode**(`m`, `w`?): `Writer`

Defined in: [WAProto/index.d.ts:10930](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10930)

#### Parameters

##### m

[`IChain`](/proto-reference/SessionStructure/interfaces/IChain)

##### w?

`Writer`

#### Returns

`Writer`

***

### fromObject()

> `static` **fromObject**(`d`): [`Chain`](/proto-reference/SessionStructure/classes/Chain)

Defined in: [WAProto/index.d.ts:10932](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10932)

#### Parameters

##### d

#### Returns

[`Chain`](/proto-reference/SessionStructure/classes/Chain)

***

### getTypeUrl()

> `static` **getTypeUrl**(`typeUrlPrefix`?): `string`

Defined in: [WAProto/index.d.ts:10935](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10935)

#### Parameters

##### typeUrlPrefix?

`string`

#### Returns

`string`

***

### toJSON()

> **toJSON**(): `object`

Defined in: [WAProto/index.d.ts:10934](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10934)

#### Returns

`object`

***

### toObject()

> `static` **toObject**(`m`, `o`?): `object`

Defined in: [WAProto/index.d.ts:10933](https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/index.d.ts#L10933)

#### Parameters

##### m

[`Chain`](/proto-reference/SessionStructure/classes/Chain)

##### o?

`IConversionOptions`

#### Returns

`object`