Wires the Phase A.2 quartz send-side foundation into a working end-to-end
send: build → sign → broadcast → publish kind:8333.
commons/onchain/OnchainZapSender — stateless orchestrator. Loads the
sender's UTXOs, builds the unsigned PSBT via OnchainZapBuilder, signs it
through NostrSigner.signPsbt, finalizes + broadcasts via OnchainBackend,
then publishes the kind:8333 receipt through an injected publish callback.
Per-stage failures surface as OnchainZapSendResult.Failure (with the
broadcast txid preserved when only the receipt publish failed) instead of
throwing; CancellationException always propagates.
Account.sendOnchainZap — thin wrapper binding the account's signer, the
LocalCache.onchainBackend, and signAndComputeBroadcast into the
orchestrator.
amethyst wallet UI:
- OnchainZapSendDialog — collects recipient npub (or a fixed recipient when
launched from a note's zap menu), amount, fee tier (slow/normal/fast from
the backend's fee estimates), and an optional comment; runs the send and
shows progress + success/failure.
- OnchainSection — the Bitcoin card on the wallet screen gains a "Send"
button next to "Copy address" that opens the dialog for a profile zap.
Tests: OnchainZapSenderTest covers the happy path (receipt references the
broadcast txid, recipient, and amount), insufficient-funds failure at the
build stage, broadcast failure (no txid leaked), and publish failure (txid
preserved for retry).
Pending: Phase B (NIP-55 sign_psbt Intent) — external/remote signers still
throw UnsupportedMethodException; note-zap-menu entry point can reuse
OnchainZapSendDialog's recipientPubKey/zappedEvent parameters once wired.
Claude
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