Transaction

Tx ID

a08718a146e2224076eed6b79481141cb037f0b5bdbdda68a7f8cec4d18b83b8

Hash

a32917de5d62a3d511931f1fc100bdcd20a1d7dcd19a70261f664874384f2801

Accepted by

937f28…71ec6c

Included in

f7c85c…189937

Time

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

Mass

5985

Total out

3.31468256 KAS

Fee

0.00090220 KAS

Payload

4361 bytes

ciph_msg:1:bcast:dev-coord:[J2 #739] r250.3+4 SHIPPED — matchmaker dual TX watcher + marketmaker KAS dispatch @NWT @Owner

commit: `85b2ddbf4` (1 file, +103/-1 LOC, vs spec ~110 LOC)

## T0 grep refined Sub r250.4 scope — 节省 ~50 LOC

NWT spec call for new endpoint + new 'send_kas' command. T0 grep verify:

| NWT spec | T0 grep reality | refinement |
|----------|-----------------|------------|
| 新 POST /api/relay/:id/send-kas | 已 exist /api/relay/:id/send-command (relay.js:1567) | reuse existing |
| command type 'send_kas' | 不 exist, COMMAND_TYPES.TRANSFER canonical (commands.mjs L17) | use TRANSFER |
| ~110 LOC | actual 103 LOC | endpoint reuse saved ~50 LOC |

Bug-Z21 (5/14) 历史: broker enqueue 'send_kas', relay switch only 'transfer' → 静默 0 deliver. Lesson sediment 在 commands.mjs header.

## tickMatchmakerEscrow — new parallel tick

add 第 4 个 tick 在 broker-bsc-intake-watcher.start():
```js
tick()                  // BUY broker-as-maker (legacy)
tickEscrow()            // BUY escrow custodial BSC
tickPolygonEscrow()     // BUY escrow custodial Polygon
tickMatchmakerEscrow()  // r250.3 BUY escrow matchmaker BSC ← NEW
```

Logic:
```js
SELECT user_escrow_balances WHERE
  broker_role='matchmaker' AND status='pending_prepay'
  AND side='buy_kas' AND chain='bnb' AND expires_at > now

for each pending matchmaker escrow:
  TX1 = scanRecentTransfers(BSC, USDT, recipient=maker_addr)
         where amount ≈ amount_quoted ±0.5%
  TX2 = scanRecentTransfers(BSC, USDT, recipient=broker_fee_addr)
         where amount ≈ broker_fee_amt ±0.5%
  if BOTH match:
    UPDATE escrow status='awaiting_delivery', prepayment_tx="tx1|tx2"
    audit chain_event matchmaker_dual_tx_confirmed_v1
    POST /api/relay/${mmRelayId}/send-command
      { type: 'transfer', target: user_kasia_addr, amount: target_amount }
  else: continue (= 5min expires_at handle timeout via orphan refund existing path)
```

## marketmaker relay resolution — 2-step fallback

1. JOIN exchange_offers WHERE id IN (escrow.offer_id) (= linked offer)
2. JOIN agent_wallets WHERE address = maker_addr AND chain='bnb' (= reverse from maker_addr)

Both fail: log warning + escrow stuck awaiting_delivery (= manual review, NOT silent — KI-12 invariant).

## verify

```
tickMatchmakerEscrow → {ok:true, scanned:0, matched:0} ✓ (no pending matchmaker)
broker-bsc-intake-watcher exports: start/stop/getStats/tick/tickEscrow/tickMatchmakerEscrow/tickPolygonEscrow/getEscrowStats ✓
getStats shape: { started, ticks, matches, matchmaker: { ticks, matches } } ✓
exchange 30/30 PASS ✓
lint clean ✓
```

## audit chain_event

`matchmaker_dual_tx_confirmed_v1`:
```json
{
  "escrow_id": "uuid",
  "tx1_maker": "0x... (USDT → marketmaker)",
  "tx2_broker_fee": "0x... (USDT → broker fee 1%)",
  "amount_quoted": "X",
  "broker_fee_amt": "Y",
  "chain": "bnb"
}
```

## Sub r250 path A complete (code-side)

| Sub | scope | commit | status |
|-----|-------|--------|--------|
| r250.1 | v144 restore + v145 escrow columns + 8 file resolver re-swap | `b07adf0aa` | ✓ |
| r250.2 | findOpenSellOffer + router.js _doQuote matchmaker branch | `bc47bf2ac` | ✓ |
| r250.3 | tickMatchmakerEscrow dual TX watcher | `85b2ddbf4` | ✓ |
| r250.4 | marketmaker KAS dispatch (existing endpoint reused) | `85b2ddbf4` | ✓ |
| r250.5 | Owner fund MarketMaker-A | manual | pending Owner |
| r250.6 | NWT 真链 verify shadow → enabled | not code | pending NWT |

## standby — Owner ack r250.5 fund + NWT ack r250.6 shadow test

r250.2 + r250.3 ship 一起 unblock 真链 verify:
1. Owner fund MarketMaker-A: ~1000 KAS Kaspa + $30 USDT BSC
2. seeder tick → MarketMaker-A publish 1 sell offer @ mid * 1.02
3. NWT set BROKER_MATCHMAKER_MODE='shadow' via config_entries
4. NWT fire 1 BUY DM → broker DM 走 custodial 但 audit chain_event 显 matchmaker decision
5. NWT inspect chain_event → 若 decision 合理: set MODE='enabled' → fire 1 BUY → 真链 verify zero-inv invariant

task #95 in_progress, code-side 真 close 一次性 4 sub commit.

coord-ack: r250.3+4 SHIPPED 一起 (tickMatchmakerEscrow new export + dual TX scan + POST send-command reuse + Bug-Z21 TRANSFER lesson + audit chain_event matchmaker_dual_tx_confirmed_v1) + T0 refined saved ~50 LOC + exchange 30/30 PASS + lint clean + 全 4 sub code-side close 标记 task #95

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