> For the complete documentation index, see [llms.txt](https://docs.justaname.id/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.justaname.id/sdk-reference/justaname-core-sdk/interfaces/siweheaders.md).

# SIWEHeaders

[**@justaname.id/sdk**](/sdk-reference/justaname-core-sdk.md) • **Docs**

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[@justaname.id/sdk](/sdk-reference/justaname-core-sdk/globals.md) / SIWEHeaders

## Interface: SIWEHeaders

Specifies the headers required for Sign-In with Ethereum (SIWE) requests. These headers are essential for authenticating requests using Ethereum-based signatures, ensuring the caller controls a specific Ethereum address.

SIWEHeaders

### Properties

#### xAddress

> **xAddress**: `string`

The Ethereum address of the user. This address is expected to match the public key derived from `xSignature` to successfully authenticate the request.

**Defined in**

[packages/@justaname.id/sdk/src/lib/types/headers/index.ts:17](https://github.com/JustaName-id/JustaName-sdk/blob/dc845c10af242e3ca87d95ef392516ac0bfa8b95/packages/@justaname.id/sdk/src/lib/types/headers/index.ts#L17)

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#### xMessage

> **xMessage**: `string`

The original message that was signed by the user. This message typically contains a challenge or nonce to prevent replay attacks.

**Defined in**

[packages/@justaname.id/sdk/src/lib/types/headers/index.ts:15](https://github.com/JustaName-id/JustaName-sdk/blob/dc845c10af242e3ca87d95ef392516ac0bfa8b95/packages/@justaname.id/sdk/src/lib/types/headers/index.ts#L15)

***

#### xSignature

> **xSignature**: `string`

The digital signature produced by signing `xMessage` with the user's private key. This signature is used to verify the authenticity of the message.

**Defined in**

[packages/@justaname.id/sdk/src/lib/types/headers/index.ts:16](https://github.com/JustaName-id/JustaName-sdk/blob/dc845c10af242e3ca87d95ef392516ac0bfa8b95/packages/@justaname.id/sdk/src/lib/types/headers/index.ts#L16)


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