Prevent swap KYC terms modal from stacking and dismiss abuse

[j0ntz]

Description

Asana task

Fixes two bugs with the swap KYC terms verification modal:

1. Stacking modals: When the quote auto-refresh timer expires while the terms modal is open, the scene replaces itself via SwapProcessingScene, remounts, and calls swapVerifyTerms again — stacking a duplicate modal on the still-open first one. Fixed by deferring the timer: if it fires while the terms modal is pending, the expiry is recorded and replayed after the modal resolves.

2. Destructive dismissal: Backdrop tap, swipe-down, X button, and hardware back all resolved false, triggering changeEnabled(false) on the swap provider — silently removing it from exchange settings without clear user intent. Fixed by removing onCancel from the EdgeModal, making the modal non-dismissable. The user must now explicitly tap Accept or Reject.

Closes: https://app.asana.com/1/9976422036640/project/1200972350208303/task/1213613256799799

CHANGELOG

Does this branch warrant an entry to the CHANGELOG?

• Yes
• No

Dependencies

none

Requirements

If you have made any visual changes to the GUI. Make sure you have:

• Tested on iOS device
• Tested on Android device
• Tested on small-screen device (iPod Touch)
• Tested on large-screen device (tablet)

---

Note

Medium Risk
Touches swap confirmation timing/navigation and terms enforcement, which can affect quote expiry handling and whether swaps proceed or providers get disabled. Risk is mitigated by being localized to modal dismissal behavior and timer expiry logic.

Overview
Prevents the swap KYC/terms verification modal from being dismissed implicitly (backdrop/close/back gestures) by removing the EdgeModal onCancel handler, requiring an explicit Accept/Reject choice.

Fixes quote auto-refresh interactions in SwapConfirmationScene by deferring the exchange timer expiry while the terms check is pending, then replaying the expiry after the modal resolves to avoid duplicate/stacked terms modals and inconsistent navigation.

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