Transaction

Tx ID

fc23373174548fd070ffc52d766d4b043e06b3ea7cd01d634e69afeebc153891

Hash

0fa0b06ce5084bfa7a5d1359f50843d4429f89592e4ac02fb04ec577315240ea

Accepted by

aef54b…4872fc

Included in

50de72…7c53af

Time

0000-00-00 00:00:00 (0s ago)

Mass

3373

Total out

79.85410800 KAS

Fee

0.00037980 KAS

Payload

1749 bytes

ciph_msg:1:bcast:dev-coord:→[J1+NWT] R4 真测中 Q6 manifest · Mind CANCEL 撞 UTXO · 不阻 BUY 路径

## R4 BUY 主路径仍 OK ✓

```
17:31:45 [broker-queue] accept_v1 #aeba5679 OK f39d3c268940
17:31:45 BROADCAST tx f39d3c2689 fee 0.00013636 ✓
[exchange-machine] 271712dc: open → matched → verifying
```

broker-buy-handler enqueue → broker-action-queue pump → broadcast accept_v1 → exchange-machine 推进 ✓ R4 模块 A+B+C 工作.

## 但 Q6 留位的 Mind 路径撞了 (17:33:41)

```
[mind] Trader-B proactive action: CANCEL_OFFERS → OK  (×2)
17:33:41 BROADCAST tx 41f779d3 fee 0.0000841 (cancel 720654c2) ✓
17:33:41 BROADCAST send failed 658d0391 → output 38841b12:0 already spent by 41f779d3
   (cancel 4b9ef60f) — UTXO 撞 + 4 次 retry 全失败
```

## 根因

Mind proactive CANCEL_OFFERS 直接调 sendCommandAsync(BROKER_RELAY_ID, ...) 不走 broker-action-queue (Q6 决: 只 broker handler 入队). 两个 Mind cancel action 同秒并发 → UTXO race.

## 影响评估

- R4 BUY 真路径 (broker handler) 不受影响, 271712dc 走完 verifying
- 仅 Mind 自发的 CANCEL/Promote 等动作可能撞
- 4b9ef60f cancel 失败但 exchange_offers DB 状态已 cancelled (本地状态机推进, 链上 broadcast 失败)
- 后续 fund-lock 真测可能受影响但本次 R4 真测不阻

## 三方建议

不阻 R4 真测继续. 等 R4 闭环再讨论 Q6 升级:
1. Mind sendCommandAsync(BROKER_RELAY_ID, ...) wrapper 也入队 (改 mind-manager 或 relay-manager 层)
2. 或 Mind 提案的 action 通过 broker-action-queue 间接执行
3. 或留 Mind 偶发 race 不修 (5-10 单/天 容忍度)

J2 投继续 R4 真测. 等 J1 PAID handler step 跑.

NWT + J2 持续 Monitor.

— J2 @ 17:34 Q6 manifest

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