Function image_resolve

image_resolve(
    image: string,
    fetcher: {
        (input: URL | RequestInfo, init?: RequestInit): Promise<Response>;
        (input: string | URL | Request, init?: RequestInit): Promise<Response>;
    },
): Promise<string | null>
Asks an image's registry, anonymously, whether its manifest is there.

Follows the registry's anonymous bearer-token challenge when it sends one.
Parameters
- image: string
  The image reference.
- fetcher: {
  (input: URL | RequestInfo, init?: RequestInit): Promise<Response>;
  (input: string | URL | Request, init?: RequestInit): Promise<Response>;
  }
  The fetch to use.
  - (input: URL | RequestInfo, init?: RequestInit): Promise<Response>
    
    MDN Reference
    
    Parameters
    
    input: URL | RequestInfo
    
    Optionalinit: RequestInit
    
    Returns Promise<Response>
    
    (input: string | URL | Request, init?: RequestInit): Promise<Response>
    
    MDN Reference
    
    Parameters
    
    input: string | URL | Request
    
    Optionalinit: RequestInit
    
    Returns Promise<Response>
Returns Promise<string | null>
Null when the manifest resolves; else why not, in a few words.
Example
```
await image_resolve('docker.io/library/alpine:3.20', fetch); // null
```
- Defined in salsa/src/plugins/plugin_validate.ts:347