feat: show Mempool data source in Settings->About

[visawestern]

What

Adds the configured Mempool data source to Settings → About, right after the "Chain Data Source" row. The backend already serves mempoolUrl via GET /api/info (see config/config.go GetMempoolUrl()), but the About screen only used it for LSP node links — there was no dedicated row showing which mempool instance is in use.

Changes

• frontend/src/screens/settings/About.tsx (+12): conditional info.mempoolUrl block rendering a "Mempool Data Source" ExternalLink (reuses existing ExternalLink + ExternalLinkIcon, same style as the LSPS2 link). No new imports/dependencies, no backend changes.

Screenshots

N/A (one conditional row, same styling as adjacent rows).

Test plan (real, run locally on this branch)

• yarn install --frozen-lockfile — OK
• yarn prepare:http — OK
• yarn tsc:compile (tsc --noEmit) — exit 0, clean
• yarn eslint src/screens/settings/About.tsx --max-warnings 0 — exit 0, clean
• yarn lint:js (eslint src --max-warnings 0) — exit 0, clean
• yarn prettier --check src/screens/settings/About.tsx — pass
• git apply --check of the patch on pristine base 7b3fcaa — passes
• go test ./... skipped: backend untouched (frontend-only change)

Closes #2548

Summary by CodeRabbit

• New Features
  • The About screen now displays the mempool data source as a clickable external link when available.

[coderabbitai]

Navigate logical layers of code changes, visualize relationships, and explore their blast radius.

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 4f3e47f6-d4b7-4937-bd04-ad1e9927c7e4

📥 Commits

Reviewing files that changed from the base of the PR and between 7b3fcaa and 73b81cb.

📒 Files selected for processing (1)

• frontend/src/screens/settings/About.tsx

Included review availability: This review used your included allowance. Your plan provides up to 2 included reviews per hour; 1 remain after this review.

---

📝 Walkthrough

Walkthrough

The About screen now displays a “Mempool Data Source” entry with the configured URL as an external link when info.mempoolUrl is present.

Changes

Mempool data source display

Layer / File(s)	Summary
Conditional mempool source entry frontend/src/screens/settings/About.tsx	When info.mempoolUrl is present, the About screen shows the “Mempool Data Source” label and URL link with an icon. Otherwise, it omits the entry.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Feature

Suggested reviewers: rolznz

Merge Risk: ⚪ Minimal · up to 73b81

The About page displays the configured Mempool source when available. No merge-blocking issue was identified.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 73b81

The change adds a link to the configured mempool source, not a new service or permission. Opening it requires a user click. No introduced security issue was established, though control of the configured destination was not fully assessed.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The new exposure is a user-clickable destination on About even without LSPS2 information. The URL was already present in the info response and used by About for LSPS2 links.

Trust Boundaries and Controls

• inferred — The inspected flow crosses from deployment configuration to an external destination on user click. It does not show an About-screen input controlling that destination or a new privileged action; permissions governing the deployment setting remain unverified.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: displaying the Mempool data source in Settings → About.
Linked Issues check	✅ Passed	Issue #2548 requires the configured Mempool data source to appear in Settings → About. The change adds a conditional “Mempool Data Source” row after “Chain Data Source” and renders info.mempoolUrl w…
Out of Scope Changes check	✅ Passed	The whole-PR diff changes only frontend/src/screens/settings/About.tsx. The change directly supports issue #2548 and does not add unrelated backend, UI, or configuration changes.

• Fix all pre-merge checks with AI

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create a new PR

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}