… cp-7.76.0 (#29592)

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## **Description**

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This PR adds support for auto slippage for RWA tokens

COW swap liquidity is volatile and to address it, cow swap provides
dynamic slippage suggestion service in there SDK.
Bridge api is using it. On extension and mobile, we are providing auto
option by default when one or both tokens are RWA (same is implemented
for solana tokens)
When it is auto, dynamic slippage is applied.

We also want user to have freedom to choose slippage. Hence we have kept
existing options to choose along with auto.

## **Changelog**

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CHANGELOG entry: Added auto slippage support for RWA tokens

## **Related issues**

Fixes:

## **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]
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## **Pre-merge author checklist**

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- [ ] 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).
- [ ] I've completed the PR template to the best of my ability
- [ ] I've included tests if applicable
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if applicable
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guidelines](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

#### Performance checks (if applicable)

- [ ] I've tested on Android
  - Ideally on a mid-range device; emulator is acceptable
- [ ] 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
- [ ] 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
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- [ ] I've manually tested the PR (e.g. pull and build branch, run the
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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> Changes default slippage behavior for same-chain EVM swaps when a
stock-class RWA token is involved, which can affect quote execution
outcomes and UX. Risk is mitigated by gating on the RWA remote feature
flag and adding targeted unit/integration tests.
> 
> **Overview**
> Adds a new `selectIsRwaSwap` selector (same-chain EVM + stock RWA
token + RWA flag enabled) and uses it to treat those swaps like Solana
same-chain swaps for slippage.
> 
> When `selectIsRwaSwap` is true, `useInitialSlippage` now initializes
slippage to `DEFAULT_SLIPPAGE_RWA` (*undefined* → provider dynamic
slippage) and `useSlippageConfig` injects an `auto` preset
(`['auto','0.5','2']`) into the slippage options.
> 
> Refactors stock-RWA detection into shared `isStockRwaBridgeToken`,
forwards `rwaData` through Token Details swap navigation, and
adds/updates tests covering the new selector and slippage behavior
(including a BridgeView RWA swap case).
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
2bec59e. 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: metamaskbot <metamaskbot@users.noreply.github.com>