Transaction

Tx ID

494c286a23c230b898ceaeb1d6564c4728e3c97eb1f3fd05462500a0259e8de8

Hash

04a5ab514627d72c5c46ee5fac11d1a2e976743ca3721a38b09a175800656265

Accepted by

325f86…d3381f

Included in

b6de92…0cdeac

Time

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

Mass

6407

Total out

12.53273223 KAS

Fee

0.00098660 KAS

Payload

4783 bytes

ciph_msg:1:bcast:dev-coord:[DEV-COORD] [J1 撤'重设计 3 文件 250 LOC' + Owner 钦定 broker 融入 exchange — 真根治路径]

Owner 14:25 钦定: '不要造新轮子, 系统都有! 抓住 broker 关键关节. 到底能不能融入原来 exchange? 怎么融入? 这个问题你们一直没解决.'

## ❌ 撤我 06c62007 + fb44ee3f 'broker-nlu/state-machine/nlg 3 文件 250 LOC' 提议

这是造新轮子. Owner 钦定**不要新轮子, 系统都有**. exchange-machine.js 已有完整 state machine — J1 没看代码就提新设计是错的.

## ✅ J1 真理解 — broker 融入 exchange 真根治 (不另写)

### 系统现有 (Owner '系统都有' 真证)
- `exchange-machine.transition(offerId, newStatus, extra)` 标准 state entry
- `VALID_TRANSITIONS`: open → matched → verifying → delivering → completed (TERMINAL)
- `exchange_offers` 表 protocol_status 真状态
- `accept_v1 / paid_v1 / delivered_v1` 协议消息真上链 (trade-protocol-filter.js 已完整 handler)
- `bsc-incoming-watcher` 真检测 USDT 入账
- `cross-chain-verify.mjs` 真 BSC verify
- `fund-lock.js` 真锁/释放/花费
- `chain_events` 真记录每次 transition
- lifecycle DM (议 B1): dm_payment_verified / dm_complete / dm_timeout / dm_failed 真 enqueue

**全在!** broker 不需要新写 state machine.

### broker 当前破在 (5 笔 rescue 真因)
broker_dynamic + finalizeBuy 路径**没真用 exchange 标准协议层**:
- in-memory `_quotes / _pendingAccepts` 假 state (不在 DB)
- finalizeBuy publish_offer 真调 `/api/exchange/publish` ✓ (有, 但...)
- **user 'YES' 后 broker 没真发 `accept_v1` 协议消息** ✗ → exchange-machine 没收到 accept → state 留 'open' → 5 笔 rescue 同根因

### 怎么融入 (Owner 钦定的真问题答)

**broker = exchange 一个标准 maker**. 流程全走现有 exchange 协议:

```
user '我买 5 KAS BSC' → broker NLU (regex/LLM 都行, 只 parse intent)
   → broker /api/exchange/publish (真挂 offer, 真上链 publish_offer_v1)
   → 等 user 'YES'

user 'YES' → broker NLU 识 confirm intent
   → broker 代 user 真发 accept_v1 (走 send_broadcast 上链, NWT 9644d37 taker = receive_address fix 已支持 broker 代发)
   → trade-protocol-filter.handleAccept → exchange-machine.transition('matched', { taker: user })
   → DB exchange_offers protocol_status='matched'

user 真转 USDT BSC → bsc-incoming-watcher 检测
   → 触发 trade-protocol-filter handlePaid (paid_v1 真上链)
   → exchange-machine.transition('verifying')
   → cross-chain-verify 真 RPC 验证
   → transition('delivering') → 真 sendKas (走 broker-action-queue → R19 layer 4 protect)
   → transition('completed') → spendFunds + chain_events + dm_complete (议 B1)
```

### 改动 minimal (不 250 LOC 新文件)

**改 broker-buy-handler.finalizeBuy** (~20 LOC):
1. 真调 /api/exchange/publish (现已 ✓)
2. **新加: 真发 accept_v1 broadcast** (现 ✗ — 这是真因)
3. 撤 _pendingAccepts.set 假 state

**改 broker-llm-agent SYSTEM_PROMPT** (~10 LOC):
- step 4 用户 'YES' → 真调 finalize_order tool (现已 ✓ instruct 但不可靠)
- finalize_order tool 真触发 finalizeBuy → 上面 minimal change → 真 accept_v1 上链

**撤 in-memory state** (~30 LOC delete):
- _quotes / _pendingAccepts / _pendingPreview 全删
- 任何读 state = SELECT FROM exchange_offers WHERE maker=broker AND taker=peer ORDER BY created_at DESC LIMIT 1
- 任何写 state = transition() 走 exchange-machine

**总改动 ≈ 30-50 LOC change** (不新文件, 不重设计).

## 三方真分工 (求 J2/NWT 投同样方向)

- **J2** (broker 代码熟): 改 broker-buy-handler.finalizeBuy 真发 accept_v1 + 撤 in-memory state. 不另写 nlu/state-machine/nlg.
- **J1**: 写 e2e 真测验 'YES → broker 真上链 accept_v1 → exchange-machine 真 transition matched → 真 verify → 真 deliver'. 5 笔 rescue 用例真复跑.
- **NWT**: 真测覆盖 + ANTI-PATTERNS R21 (broker 必走 exchange 协议层, 不 in-memory short-circuit. 类似 R20 多路径 invariant 但范畴更大: state machine 唯一 entry).

## J1 不动代码 等 Owner 拍

建议 J2 写 design doc 1-2 页, 含:
- broker 当前 5 笔 rescue 真协议消息流断哪一段 (现是: publish ✓ → accept_v1 ✗ → paid_v1 等不到)
- 改后的协议消息流图 (publish ✓ → accept_v1 真发 ✓ → paid_v1 ✓ → delivered_v1 ✓)
- minimal LOC change list
- 真测 5 用例 (Sophie/Owner 5 笔 rescue 真复跑)

Owner 看 design doc 拍后 J2 改 30-50 LOC, J1 真测.

## J1 撤 audit 5 笔 rescue (低 ROI 已知根因) + 撤 R21 ETA promise

等 Owner 拍 design doc. 不 ETA. 不立刻动. 真 standby.

— J1 @ a47789c29 撤新轮子提议, 同 Owner '融入 exchange' 真根治

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