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Claude
16401e536a
Builds out the Cashu wallet beyond the scaffold: a complete mint
protocol layer, the four user-facing wallet operations (mint, melt,
send-as-token, redeem), and auto-redemption of inbound NIP-61
nutzaps. Wires the relay subscription so the wallet state syncs
across devices.
quartz/ — mint protocol layer (commonMain + jvmAndroid)
* nip60Cashu/mintApi/MintApiDtos.kt — Kotlinx Serialization DTOs
for NUT-00..06 (info, keys, mint/quote/bolt11, mint/bolt11,
swap, melt/quote/bolt11, melt/bolt11, checkstate). ProofDto
carries the optional NUT-11 witness.
* nip60Cashu/mintApi/MintHttpClient.kt — OkHttp + kotlinx-json
client bound to a single mint URL; surfaces MintHttpException
with the mint's detail string preserved for the UI.
* nip60Cashu/mintApi/CashuMintOperations.kt — combines BDHKE +
HTTP + amount splitting. Exposes requestMintQuote / mintProofs
/ swap / requestMeltQuote / meltProofs / redeemNutzap. Power-
of-2 amount split per NUT-00.
* nip60Cashu/mintApi/AmountSplit.kt — extracted into commonMain
for testability.
* nip60Cashu/p2pk/P2PK.kt — NUT-11 locked-secret format and
BIP-340 Schnorr witness signing.
* CashuProof gains an optional witness field.
amethyst/ — wallet ops + UI
* model/nip60Cashu/CashuWalletOps.kt — Nostr publishing layer
over CashuMintOperations:
- publishWalletEvents (kind 17375 + kind 10019 together)
- startMintFromLightning / checkMintQuote /
completeMintFromLightning (kind 7374 lifecycle + 7375 +
7376 + NIP-09 deletion of the quote)
- meltToLightning (pre-swap if needed, melt, change rollover,
delete sources, history)
- sendAsToken (swap to exact split, V4Encoder for cashuB,
rollover, history)
- redeemToken (inbound cashuA/B via swap)
- redeemNutzap (NIP-61 P2PK unlock + swap, history with
unencrypted "redeemed" marker per spec)
* service/cashu/v4/V4Encoder.kt — inverse of the existing
V4Parser; encodes proofs to cashuB strings for send.
* ui/screen/loggedIn/wallet/CashuWalletScreen.kt — adds four
action buttons (Receive / Send LN / Send Token / Redeem) with
AlertDialog-based flows that poll the mint quote, paste/copy
from clipboard, and surface mint errors.
* ui/screen/loggedIn/wallet/CashuWalletViewModel.kt — new mint
/ melt / send-token / redeem state machines, subscribes via
CashuWalletFilterAssembler on init (auto-syncs the wallet
across devices), observes the wallet note's flow for reactive
refresh, and auto-redeems any inbound kind 9321 nutzap that
isn't already marked redeemed in our kind 7376 history.
relay subscription
* commons/.../CashuWalletFilterAssembler.kt refactored into the
standard ComposeSubscriptionManager + SingleSubEoseManager
pair (matches the NWC pattern). Now driven by subscribe(query)
/ unsubscribe(query) calls from the ViewModel.
* RelaySubscriptionsCoordinator.cashuWallet exposes a singleton
assembler reachable as Amethyst.instance.sources.cashuWallet.
Tests (jvmTest)
* BdhkeTest — 7/7
* AmountSplitTest — 7/7 (NUT-00 vectors + sum invariants)
* P2PKTest — 6/6 (secret round-trip, witness verifies under
BIP-340, compressed + x-only acceptance)
Total: 20 new NIP-60 jvm tests, all passing. Both playDebug and
fdroidDebug compile clean.
Deferred (clearly bounded follow-ups):
* Sending nutzaps (kind 9321) from the zap picker UI — requires
integrating with the existing LN zap chooser surface. The
underlying P2PK locking primitives are in place.
* Recovering an interrupted kind 7374 mint quote on next launch
— current flow keeps polling while the dialog stays open.
https://claude.ai/code/session_01MdWddiar819f8XYt5N8BjP