feat: add atomic store updates

[brendanjryan]

Summary

Add an atomic Store.update() primitive and a new AtomicStore type, then use them to eliminate race conditions in Tempo replay protection and channel state updates.

Why

The previous check-then-mark flow for replay protection and channel state mutation could race under concurrent requests or multi-instance deployments. This was an intentional choice at the time, but we now see a larger need for multi-instance deployments so want to add this primitive. AtomicStore gives store backends a typed atomic primitive and moves all sensitive Tempo paths onto it.

Notes

• Store.update() is optional at the Store interface level but required for Tempo charge/session via AtomicStore.
• Store.memory() always returns AtomicStore.
• Callbacks passed to update must be synchronous, pure, and retry-safe.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/mppx@295

commit: 59bc4e1

[tempoxyz-bot]

👁️ Cyclops Security Review

3dad711

🧭 Auditing · mode=normal · workers 0/3 done (3 left) · verify pending 0

Worker	Engine	Progress	Status
pr-295-w1	gemini-3.1-pro-preview	✅ thread-1 ✅ thread-2 🔍 thread-3	Running
pr-295-w2	amp/deep	🔍 thread-1 · ·	Running
pr-295-w3	gpt-5.4	🔍 thread-1 · ·	Running

⚙️ Controls

• 🚀 Keep only 1 remaining iteration per worker after the current work finishes.
• 👀 Keep only 2 remaining iterations per worker after the current work finishes.
• ❤️ Let only worker 1 continue; other workers skip queued iterations.
• 😄 Let only worker 2 continue; other workers skip queued iterations.
• 🎉 End faster by skipping queued iterations and moving toward consolidation.
• 😕 Stop active workers/verifiers now and start consolidation immediately.

---

📜 7 events

🔍 pr-295-w1 iter 1/3 [audit-ripple.md]
🔍 pr-295-w2 iter 1/3 [audit-focused.md]
🔍 pr-295-w3 iter 1/3 [audit-deep-focus.md]
✅ pr-295-w1 iter 1 — clear | Thread
🔍 pr-295-w1 iter 2/3 [audit-historical.md]
✅ pr-295-w1 iter 2 — clear | Thread
🔍 pr-295-w1 iter 3/3 [audit-focused.md]

[tempoxyz-bot]

👁️ Cyclops Security Review

6e7757a

🧭 Auditing · mode=normal · workers 0/3 done (3 left) · verify pending 0

Worker	Engine	Progress	Status
pr-295-w1	gemini-3.1-pro-preview	· · ·	Running
pr-295-w2	amp/deep	· · ·	Running
pr-295-w3	gpt-5.4	· · ·	Running

⚙️ Controls

• 🚀 Keep only 1 remaining iteration per worker after the current work finishes.
• 👀 Keep only 2 remaining iterations per worker after the current work finishes.
• ❤️ Let only worker 1 continue; other workers skip queued iterations.
• 😄 Let only worker 2 continue; other workers skip queued iterations.
• 🎉 End faster by skipping queued iterations and moving toward consolidation.
• 😕 Stop active workers/verifiers now and start consolidation immediately.

[brendanjryan]

Refactored Store/AtomicStore to use Viem-style generic slot pattern per @tmm suggestion.

Before (structural patching):

type Store<itemMap> = { get; put; delete; update?: Update }
type AtomicStore<itemMap> = Omit<Store, "update"> & { update: Update }

After (compositional via 2nd generic slot):

type StoreActions<itemMap> = { get; put; delete }
type AtomicActions<itemMap> = { update: Update }

type Store<itemMap, extended> = StoreActions<itemMap> & extended
type AtomicStore<itemMap> = Store<itemMap, AtomicActions<itemMap>>