…ssue. cp-7.79.0 (#29091)

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## **Description**

Ledger hardware wallet users on Monad (and other chains / contracts
without a matching Ledger plugin) were hitting a misleading "blind
signing is not enabled" error when trying to complete gas-sponsored
swaps, even though blind signing was enabled on the device.
this PR will resolve the issue #28589 to use new
@metamask/eth-ledger-keyring-bridge`

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## **Changelog**

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CHANGELOG entry: Fixed a misleading "blind signing is not enabled" error
preventing Ledger hardware wallet users from completing gas-sponsored
swaps on Monad and other chains without a matching Ledger plugin.

## **Related issues**

Fixes: #28589 

## **Manual testing steps**

```gherkin
Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]
```

## **Screenshots/Recordings**

<!-- If applicable, add screenshots and/or recordings to visualize the
before and after of your change. -->

### **Before**

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### **After**

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## **Pre-merge author checklist**

- [x] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [x] I've completed the PR template to the best of my ability
- [x] I've included tests if applicable
- [x] I've documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [x] I've applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

#### Performance checks (if applicable)

- [x] I've tested on Android
  - Ideally on a mid-range device; emulator is acceptable
- [x] I've tested with a power user scenario
- Use these [power-user
SRPs](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/edit-v2/401401446401?draftShareId=9d77e1e1-4bdc-4be1-9ebb-ccd916988d93)
to import wallets with many accounts and tokens
- [x] I've instrumented key operations with Sentry traces for production
performance metrics
- See [`trace()`](/app/util/trace.ts) for usage and
[`addToken`](/app/components/Views/AddAsset/components/AddCustomToken/AddCustomToken.tsx#L274)
for an example

For performance guidelines and tooling, see the [Performance
Guide](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/400085549067/Performance+Guide+for+Engineers).

## **Pre-merge reviewer checklist**

- [x] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [x] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.




<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> Changes only the Ledger hardware-wallet signing dependency path used
for transactions/swaps; no local code review surface beyond the version
bump.
> 
> **Overview**
> Bumps **`@metamask/eth-ledger-bridge-keyring`** from `^12.0.2` to
**`^12.1.0`** (and refreshes **`yarn.lock`**) so Ledger signing uses the
updated bridge stack—**`@metamask/keyring-sdk` ^2.1.1**, explicit
**`@ledgerhq/hw-transport`**, and newer **`@ledgerhq/*`**
transport/device/error packages.
> 
> There are **no app source changes**; behavior comes from the upgraded
package. The intent is to stop a false **“blind signing is not
enabled”** failure when Ledger users complete **gas-sponsored swaps on
Monad** (and similar chains without a matching Ledger plugin), as in
#28589.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
b7d5043. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>