UXP plugin Promises are forever pending

[bert2217273010c1]

I'm writing a plugin for indesign.
I want to read the name from the active document.
This is my code in a helper file:
```

const { ExportFormat, app } = require("indesign");

const {File} = require('fs');

class exportUtils {

async exportToEpub() {

try {

let doc = app.activeDocument;

let fullName = await doc.fullName;

console.log(fullName); // Directly log the fullName

let epubFileName = fullName.toString().replace(/\.[^\.]+$/, ".epub");

doc.exportFile(ExportFormat.FIXED_LAYOUT_EPUB, new File(epubFileName), false);

} catch (error) {

console.error(error);

}

};

}

```

The problem is fullName is a Promise and it never resolves.
I expected it to be a File object according to the api reference here: https://developer.adobe.com/indesign/dom/api/d/Document/

[Dirk Becker · Accepted solution]

UXP tries to mimic the full browser experience including all security circus.
See your promise details, maybe something about PromiseState "rejected" and PromiseResult Error: Could not find an entry … ?
This could be about missing permission requests in your manifest.
If your await works in an UXP Script, the difference is described here: https://developer.adobe.com/indesign/uxp/resources/fundamentals/manifest/
More details for plugins:
https://developer.adobe.com/indesign/uxp/plugins/concepts/manifest/
Basically you need:
"requiredPermissions": {
"localFileSystem": "fullAccess"
}
General info on Files the UXP way:
https://developer.adobe.com/indesign/uxp/reference/uxp-api/reference-js/Modules/uxp/Persistent%20Fil...

[scan35126957fna6]

Thank you, this helped me!