# Signed Fetch

The `SignedFetch` module provides an implementation of the `fetch` interface that is transparently compliant with the [signed fetch](https://github.com/decentraland/docs/blob/main/auth/signed_fetch/README.md) protocol, which defines how to attach signed [authentication chains](https://github.com/decentraland/docs/blob/main/auth/authchain/README.md) to outgoing requests.

The procedures for signing and verifying this request are detailed in the [authentication chain](https://github.com/decentraland/docs/blob/main/contributor/auth/authchain/README.md) page.

Using `SignedFetch` from a scene requires the [`USE_FETCH`](https://github.com/decentraland/docs/blob/main/contributor/content/entity-types/scenes/README.md#permissions) permission.

### Methods

**`signedFetch`**

Make an HTTP request as you would with ([`fetch`](https://github.com/decentraland/docs/blob/main/contributor/globals/README.md#http)), automatically adding the verification headers.

```ts
interface Request {
  // The request target URL:
  url: string;

  // Optional, self-explanatory parameters for the request:
  init?: {
    method?: string;
    body?: string;
    headers: { [key: string]: string };
  };
}

interface Response {
  // Whether the HTTP request was performed successfully (codes other than 2xx are not failures)
  ok: boolean;

  // The self-explanatory details of the response:
  status: number;
  statusText: string;
  headers: { [key: string]: string };
  body: string;
}

function signedFetch(Request): Promise<Response>;
```