Files
amethyst/commons
Claude ba46f31359 feat(cashu): NIP-87 mint discovery + recommendations
Adds end-to-end NIP-87 support so users can pick mints from the
network instead of having to know URLs upfront, and can publicly
endorse mints they use.

Discovery (commons + amethyst)
  * commons/.../CashuMintDirectoryFilterAssembler — subscribes to
    kind:38172 cashu mint announcements and kind:38000 cashu-scoped
    recommendations (#k=["38172"]) on a configurable relay set.
    Fedimint announcements (38173) are intentionally excluded — this
    feeds the Cashu mint picker only.
  * RelaySubscriptionsCoordinator.cashuMintDirectory — singleton
    assembler reachable as Amethyst.instance.sources.cashuMintDirectory.

Indexing state (amethyst/model)
  * CashuMintDirectoryState — account-scoped index of announcements +
    recommendations. Reactive: backfills from LocalCache.notes on
    first observer and listens to LocalCache.live.newEventBundles for
    incremental updates. The relay subscription only runs while at
    least one picker is on screen (ref-counted open()/close()).
  * Ranking: follows-recommendations DESC, then total recommendations
    DESC, then URL ASC. Dedup'd by (recommender, mint URL) so a
    single recommender can't inflate counts by re-posting.
  * CashuMintDirectoryEntry — display model with URL, latest
    announcement, total and follows-recommendation counts.

Publishing recommendations (CashuWalletOps)
  * recommendMint(mintUrl, dTag?, review) — publishes kind:38000 with
    both the `a`-tag (pointing at the mint's announcement by
    kind:pubkey:dTag) and a `u`-tag with the raw URL so older clients
    indexing by URL still pick it up.

UI integration
  * MintPickerSheet — ModalBottomSheet with search field + scrollable
    list. Each row shows the mint name (parsed from the announcement
    content) or URL, with badge chips for "from people you follow"
    and total recommendation counts. The "Add" button writes the URL
    back to the caller's mints list; already-added URLs show "Added"
    instead.
  * AddCashuWalletScreen gets a "Browse" button next to the Mints
    section header that opens the picker. Selected mints are still
    Verify-able via the existing ping; users can still paste manually
    if they want.
  * CashuWalletScreen's mint list gets a thumb-up icon button per
    mint that fires viewModel.recommendMint(url) — best-effort,
    silent failure (logged via Log.w("CashuWallet")).

Wiring
  * cashuMintDirectoryFilterAssembler factory plumbs through Account →
    AccountCacheState → AppModules. The mock test AccountViewModel
    constructions in AccountViewModel.kt are updated to pass a fresh
    assembler.

playDebug + fdroidDebug compile clean. 24/24 jvm tests still passing.

https://claude.ai/code/session_01MdWddiar819f8XYt5N8BjP
2026-05-27 15:17:41 +00:00
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