Build 060.9: add WebSocket Trade Transport Model

app/src/market_data/acquisition/adapters/dzengi/models.py

@@ -161,6 +161,19 @@ class DzengiRestAggTrade:
     buyer_is_maker: bool
 
 
+# Транспортное представление одного события
+# Dzengi WebSocket internal.trade.
+@dataclass(frozen=True, slots=True)
+class DzengiWebSocketTradeEvent:
+    trade_id: int
+    price: DzengiRawNumeric
+    size: DzengiRawNumeric
+    timestamp: int
+    symbol: str
+    buyer: bool
+    order_id: str
+
+
 # Транспортное представление одного события Dzengi WebSocket ohlc.event.
 #
 # Событие содержит завершённую OHLC-свечу без объёма и поэтому не является

app/tests/unit/market_data/acquisition/adapters/dzengi/test_models.py

@@ -15,6 +15,7 @@ from src.market_data.acquisition.adapters.dzengi.models import (
     DzengiRateLimit,
     DzengiRestAggTrade,
     DzengiUnknownFilter,
+    DzengiWebSocketTradeEvent,
 )
 
 
@@ -250,3 +251,57 @@ def test_rest_agg_trade_is_immutable_and_uses_slots() -> None:
 
     with pytest.raises(FrozenInstanceError):
         trade.price = "1.00"  # type: ignore[misc]
+
+
+def test_websocket_trade_event_stores_complete_transport_contract() -> None:
+    event = DzengiWebSocketTradeEvent(
+        trade_id=2134846831,
+        price=64555.55,
+        size=0.002,
+        timestamp=1784218012030,
+        symbol="BTC/USD_LEVERAGE",
+        buyer=False,
+        order_id="00a02503-0079-54c4-0000-000081e62b58",
+    )
+
+    assert event.trade_id == 2134846831
+    assert event.price == 64555.55
+    assert event.size == 0.002
+    assert event.timestamp == 1784218012030
+    assert event.symbol == "BTC/USD_LEVERAGE"
+    assert event.buyer is False
+    assert event.order_id == "00a02503-0079-54c4-0000-000081e62b58"
+
+
+def test_websocket_trade_event_preserves_raw_numeric_values() -> None:
+    event = DzengiWebSocketTradeEvent(
+        trade_id=2134846831,
+        price="64555.55",
+        size="0.002",
+        timestamp=1784218012030,
+        symbol="BTC/USD_LEVERAGE",
+        buyer=True,
+        order_id="order-id",
+    )
+
+    assert event.price == "64555.55"
+    assert isinstance(event.price, str)
+    assert event.size == "0.002"
+    assert isinstance(event.size, str)
+
+
+def test_websocket_trade_event_is_immutable_and_uses_slots() -> None:
+    event = DzengiWebSocketTradeEvent(
+        trade_id=2134846831,
+        price=64555.55,
+        size=0.002,
+        timestamp=1784218012030,
+        symbol="BTC/USD_LEVERAGE",
+        buyer=False,
+        order_id="order-id",
+    )
+
+    assert not hasattr(event, "__dict__")
+
+    with pytest.raises(FrozenInstanceError):
+        event.price = 1.0  # type: ignore[misc]