Cherry-picking commits from main to release/8.0.0 for PR #32083

[runway-github]

• fix(money): show no-fee badge for mUSD on Monad in Earn on your crypto cp-8.0.0 (fix(money): show no-fee badge for mUSD on Monad in Earn on your crypto cp-8.0.0 #32083)

Description

mUSD on Monad did not show a "No fee" label in the "Earn on your crypto"
section, even though depositing it into the Money account incurs no
Relay fixed-spread fee.

useMoneyEarnableTokens tags a token as no-fee using a directional
match against the confirmations_relay_fixed_spread SSOT flag: the
token must have a subsidized route whose target is Monad mUSD (a
Money deposit always converts into Monad mUSD). This is correct by
construction — it never mislabels tokens that are subsidized into a
different output (e.g. Linea USDC -> Linea mUSD, or the Monad mUSD -> USDC withdraw direction).

The one gap: Monad mUSD itself. The flag omits Monad mUSD -> Monad mUSD because no swap or bridge is needed when source and target are the
same — so the directional match never tags it, despite the deposit being
fee-free. This PR adds Monad mUSD as an explicit no-fee case in the
hook. It knowingly steps outside the SSOT flag for this single edge
case; see the inline comment.

Changelog

CHANGELOG entry: Fixed mUSD on Monad not showing the "No fee" label in
the "Earn on your crypto" section.

Related issues

Fixes: https://consensyssoftware.atlassian.net/browse/MUSD-1030

Manual testing steps

Feature: No-fee label on mUSD in Earn on your crypto

  Scenario: Monad mUSD shows the No fee badge
    Given I hold mUSD on the Monad network

    When I view the "Earn on your crypto" section
    Then the Monad mUSD row shows the "No fee" label

  Scenario: a token subsidized only into a non-Monad mUSD is not mislabeled
    Given I hold a token whose only subsidized route targets a non-Monad mUSD

    When I view the "Earn on your crypto" section
    Then that token row does NOT show the "No fee" label

Screenshots/Recordings

Before

N/A

After

N/A

Pre-merge author checklist

• I've followed MetaMask Contributor
  Docs and MetaMask Mobile
  Coding
  Standards.
• I've completed the PR template to the best of my ability
• I've included tests if applicable
• I've documented my code using JSDoc format
  if applicable
• I've applied the right labels on the PR (see labeling
  guidelines).
  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
  to import wallets with many accounts and tokens
• I've instrumented key operations with Sentry traces for production
  performance metrics
• See trace() for usage and
  addToken
  for an example

For performance guidelines and tooling, see the Performance
Guide.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the
  app, test code being changed).
• 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.

---

Note

Low Risk
Localized Money UI labeling logic with added unit tests; no changes to
payments, auth, or transaction execution.

Overview
Earn on your crypto now shows the No fee badge on Monad
mUSD when depositing into the Money account.

useMoneyEarnableTokens still marks tokens only when the relay
fixed-spread config has a subsidized route whose target is Monad
mUSD. It adds an explicit Monad mUSD case because that same-token
path is omitted from the SSOT flag even though the deposit is fee-free.

Tests lock in that withdraw-only Monad mUSD routes do not rely on
directional matching alone, and that sources subsidized only into
non-Monad mUSD (e.g. Linea) stay not no-fee.

^{Reviewed by Cursor Bugbot for commit
a95b660. Bugbot is set up for automated
code reviews on this repo. Configure
here.}

---

Co-authored-by: Matthew Grainger 46547583+Matt561@users.noreply.github.com 767d224

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Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud