Add DeBox wallet connector — in-app browser wallet, EIP-6963 announced but filtered on mobile

[PonyDevAI]

Hi team 👋 — I'm writing on behalf of the DeBox team.

What DeBox is

DeBox is a Web3 social app with a built-in DApp browser, available on iOS and Android. When a dapp is opened inside DeBox, our provider is injected as window.ethereum (flagged isDeBox) and announced over EIP-6963.

What we'd like to contribute

A deboxWallet connector following the existing trustWallet pattern — injected connector when DeBox is detected, WalletConnect + debox://wc?uri= deep link otherwise.

The branch is ready: 9 files, changeset included, pnpm lint and pnpm test both green. Happy to open the PR as soon as you give the go-ahead (per CONTRIBUTING, asking first).

Branch: PonyDevAI:feat/debox-wallet

One data point that may be useful to you

While testing we hit something that seems to contradict the docs, so sharing in case it's helpful to you or to other wallet teams.

In #2461 it's stated that "EIP-6963 provider discovery on mobile will work if the user accesses your dApp inside a mobile wallet's in-app browser". On a real device we found discovery does work, but the wallet never reaches the modal:

• Pixel 7a, DeBox in-app browser → rainbowkit.com
• Provider announces correctly (EIP-6963 initialized, mountMode: immediate)
• wagmi auto-reconnects to the EIP-6963 connector, so discovery is working
• The connect modal still doesn't list DeBox
• Same injected script, same page — switching only the UA to desktop makes "Installed → DeBox" appear

This lines up with MobileOptions.tsx filtering on isRainbowKitConnector, which #2497 explains well. So the behaviour is intentional — it's just that #2461 reads as though the in-app-browser case is covered, which may confuse other wallet teams running into the same thing.

We're not asking you to change that filter for us — the connector above works within the current design. But if supporting EIP-6963 in the mobile modal for in-app browsers is ever on the table, we'd be glad to contribute the PR and provide test devices.

Question

Is the wallet addition welcome? Anything you'd like included beyond what's in #2652 (extra locales, a particular icon format, etc.)?