fix: ARC bridge/swap USDC hide max button + cleanup

[maxime-oe]

Description

Changelog

CHANGELOG entry: hide max button for ARC USDC Swap

Related issues

Fixes:

Manual testing steps

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

Before

After

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.

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Note

Medium Risk
Changes token balance and gas sufficiency math in bridge flows; incorrect decimals or rounding could mis-state balances or block/allow swaps, though scope is limited to bridge hooks and a dependency preview pin.

Overview
Fixes bridge/swap balance and gas checks for chains whose native gas asset is not 18-decimal ETH (e.g. Arc native USDC at 6 decimals), which was skewing displayed balances and sufficiency logic.

useTokensWithBalance now overrides native-address token decimals from getNativeAssetForChainId before EVM balance math, so formatted balances and the decimals field stay aligned when TokensController has stale 18-decimal data.

Adds parseUnitsSafe (rounds fractional amounts up to the token’s precision, then parseUnits) and wires it into useHasSufficientGas and useHasSufficientGasEvenIfGasIncludedOrSponsored instead of raw ethers.utils.parseUnits, avoiding under-counting when quote gas strings exceed decimal precision.

Pins @metamask/bridge-controller to preview 75.1.1-preview-2c09cc947 via package.json resolutions (with matching yarn.lock updates).

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[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[mm-token-exchange-service]

PR template — items to address before "Ready for review"

Warnings — informational, address before merging:

• Description section is empty. Describe what changed and why.
• Related issues section is empty. Add Fixes: #123 / Closes: <URL> / Refs: <Jira key>, or write a short rationale after the colon.
• Manual testing steps still contain template content (the Gherkin example title or a [...] placeholder). Replace with real steps, or write N/A — <reason>.
• Screenshots/Recordings section is empty. Add an image/video for user-facing changes, logs/console output for non-user-facing changes, or write N/A if no evidence is applicable.
• Pre-merge author checklist has unchecked items (e.g. "I've followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards."). Every box must be consciously checked — see docs/readme/ready-for-review.md.

See docs/readme/ready-for-review.md for the full Definition of Ready for Review.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​@​metamask/​bridge-controller@​75.1.1-preview-2c09cc947

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[github-actions]

🔍 Smart E2E Test Selection

• Selected E2E tags: SmokeAccounts, SmokeConfirmations, SmokeIdentity, SmokeNetworkAbstractions, SmokeNetworkExpansion, SmokeSwap, SmokeStake, SmokeWalletPlatform, SmokeMoney, SmokePerps, SmokeMultiChainAPI, SmokePredictions, SmokeSeedlessOnboarding, SmokeBrowser, SmokeSnaps
• Selected Performance tags: @PerformanceSwaps
• Risk Level: high
• AI Confidence: 100%

click to see 🤖 AI reasoning details

E2E Test Selection:
Hard rule (controller-version-update): @MetaMask controller package version updated in package.json: @metamask/bridge-controller. Running all tests.

Performance Test Selection:
The package.json adds a resolution for a preview version of @metamask/bridge-controller, and the hook changes affect token balance computation and gas fee calculations in the swap/bridge flow. These changes could impact swap quote fetching and execution performance. The @PerformanceSwaps tag covers quote fetching, token selection, swap execution, and transaction completion times — all of which are touched by these changes.

View GitHub Actions results

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
86.4% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

⚡ Performance Test Results

ℹ️ Performance test results are currently non-blocking and will not block this PR.

✅ All tests passed · 2 tests · 1 device

📱 Devices tested (1)

Android: Google Pixel 8 Pro (v14.0)

✅ Passed Tests (2)

Test	Platform	Device	Duration	Team	Recording
Swap flow - ETH to LINK, SRP 1 + SRP 2 + SRP 3	Android	Google Pixel 8 Pro (v14.0)	3.74s	@swap-bridge-dev-team	📹 Watch
Cross-chain swap flow - ETH to SOL - 50+ accounts, SRP 1 + SRP 2 + SRP 3	Android	Google Pixel 8 Pro (v14.0)	5.27s	@swap-bridge-dev-team	📹 Watch

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Branch: fix/arc-bridge-swap-USDC-cleanup · Build: Normal · Commit: 45c5f47 · View full run