# EPF - Update #2

By [plusminushalf.(eth/lens) 🦇🔊](https://paragraph.com/@plusminushalf) · 2022-11-28

---

Since my last update, I have worked on a few things & have explored a few paths for implementing the extension.

1.  I started setting up the Extension Repo, I will be using Preact for the extension due to its size and performance over React in restricted environments like chrome-extension.
    
    [https://github.com/plusminushalf/epf-wallet](https://github.com/plusminushalf/epf-wallet)
    
    While setting the repo with [crxjs.dev/vite-plugin](https://crxjs.dev/vite-plugin) I came across an issue in the library, I did raise a PR with the fix and it will be available in the next release. Untill the version is released we will be working with a beta release of the npm package. You can read more about the fix below
    
    [https://github.com/crxjs/chrome-extension-tools/pulls?q=is:pr+is:closed](https://github.com/crxjs/chrome-extension-tools/pulls?q=is:pr+is:closed)
    
2.  I explored the challenges that we will face if we will be building the 4337 wallet over Metamask Snaps. I have documented them in the link below.
    
    [https://hackmd.io/AdDOFvf8QsKAfTfmX23jLw?view](https://hackmd.io/AdDOFvf8QsKAfTfmX23jLw?view)
    
3.  I explored the Tally ho chrome extension, and how it stores private keys in a secure manner. I have documented my research at
    
    [https://mirror.xyz/plusminushalf.eth/vtRuTou-XjWjQvkigtRrTjKeQ3ZKx5ujyUFZ-W\_2s74](https://mirror.xyz/plusminushalf.eth/vtRuTou-XjWjQvkigtRrTjKeQ3ZKx5ujyUFZ-W_2s74)
    
4.  I along with Jayesh, finalised the user flow of the extension and the role of guardians in the default-specific wallet implementation. You can find both attached below.
    

![User Flow](https://storage.googleapis.com/papyrus_images/b899e490f674443183c294a9008f3d6941e9ff692a0d016d6a48c6f7e54476fd.png)

User Flow

![Role of Guardians in various actions.](https://storage.googleapis.com/papyrus_images/e06e68ba2b92146fe7b035d5c2953506d48322ef42ae9831436233b2bf9ef1b2.png)

Role of Guardians in various actions.

The Figma file for the same can be found below

[https://www.figma.com/file/GASw8N72JnozdT2FxIlLgA/4337---Wallet-design-flow?node-id=61:142&t=nkQt8xtJFkgzBv4V-0](https://www.figma.com/file/GASw8N72JnozdT2FxIlLgA/4337---Wallet-design-flow?node-id=61:142&t=nkQt8xtJFkgzBv4V-0)

---

*Originally published on [plusminushalf.(eth/lens) 🦇🔊](https://paragraph.com/@plusminushalf/epf-update-2)*