tradein-mvp/backend/app/api/v1/geocode.py

@@ -40,6 +40,10 @@ class SuggestItem(BaseModel):
     lat: float
     lon: float
     kind: str
+    # ГАР OBJECTGUID (ФИАС) дома — присутствует ТОЛЬКО у house-level кандидатов
+    # DaData-тира. У прочих тиров / street/locality-кандидатов null. Фронт
+    # прокидывает его в POST /estimate как target_fias_id (Tier 0.5 fias_exact).
+    fias_id: str | None = None
 
 
 class SuggestResponse(BaseModel):
@@ -62,13 +66,19 @@ async def suggest_addresses(
       /api/v1/geocode/suggest?q=Цвиллинга  # → пусто, такой улицы в ЕКБ нет
     """
     items = await suggest(q, db=db, limit=limit)
-    return SuggestResponse(items=[
+    return SuggestResponse(
-        SuggestItem(
+        items=[
-            label=s.label,
+            SuggestItem(
-            full_address=s.full_address,
+                label=s.label,
-            lat=s.lat, lon=s.lon, kind=s.kind,
+                full_address=s.full_address,
-        ) for s in items
+                lat=s.lat,
-    ])
+                lon=s.lon,
+                kind=s.kind,
+                fias_id=s.fias_id,
+            )
+            for s in items
+        ]
+    )
 
 
 class ReverseResponse(BaseModel):

tradein-mvp/backend/app/schemas/trade_in.py

@@ -27,6 +27,11 @@ class TradeInEstimateInput(BaseModel):
     # geocode() (который падает на DaData-формах при мёртвом Yandex-ключе).
     lat: float | None = Field(default=None, ge=-90, le=90)
     lon: float | None = Field(default=None, ge=-180, le=180)
+    # ФИАС/ГАР OBJECTGUID целевого дома, если фронт разрешил его через suggest
+    # (SuggestItem.fias_id у house-level кандидата). Прокидывается в матчер
+    # (Tier 0.5 fias_exact) ПЕРВЫМ, до fias из DaData /clean. Additive/optional —
+    # отсутствие поля сохраняет прежнее поведение.
+    target_fias_id: str | None = Field(default=None, max_length=64)
     # #2044: опциональный радиус анализа (контрол РАДИУС на /trade-in/v2), метры.
     # None → текущее дефолтное поведение (1000 м поиск аналогов, 2000 м fallback).
     # Задан → и первичный, и fallback-поиск аналогов/сделок используют ровно этот

tradein-mvp/backend/app/services/estimator.py

@@ -2663,6 +2663,11 @@ async def estimate_quality(
     #     cadastr от DaData → cadastr_exact tier заработает по мере backfill houses.
     #     Best-effort: None при любой ошибке, estimator продолжает на гео-tier'ах.
     target_house_id: int | None = None
+    # ФИАС как first-class ключ: приоритет клиентскому target_fias_id (разрешён
+    # автокомплитом suggest), иначе fias из DaData /clean. Прокидываем в Tier 0.5
+    # fias_exact матчера — самый стабильный ключ дома, точнее адрес-строки.
+    dadata_fias = dadata.house_fias_id if dadata else None
+    match_fias = payload.target_fias_id or dadata_fias
     try:
         match = match_house_readonly(
             db,
@@ -2670,12 +2675,39 @@ async def estimate_quality(
             lat=geo.lat,
             lon=geo.lon,
             cadastral_number=(dadata.house_cadnum if dadata else None),
+            house_fias_id=match_fias,
         )
         if match is not None:
             target_house_id = match[0]
             logger.info(
                 "estimate target → house_id=%s via %s (conf=%.2f)", match[0], match[2], match[1]
             )
+            # Fill-null persist: если DaData вернул fias, а у канонического дома его
+            # ещё нет — дописываем (+ qc_geo / enriched_at, сохраняя существующие
+            # значения через COALESCE). Семантика scripts/backfill_houses_dadata.py.
+            # Guard `house_fias_id IS NULL` — никогда не перетираем curated id.
+            # SAVEPOINT изолирует сбой UPDATE от внешней estimate-транзакции.
+            if dadata_fias and dadata is not None:
+                try:
+                    with db.begin_nested():
+                        db.execute(
+                            text(
+                                "UPDATE houses "
+                                "   SET house_fias_id = CAST(:fias AS text), "
+                                "       dadata_qc_geo = COALESCE(dadata_qc_geo, "
+                                "                                CAST(:qc_geo AS integer)), "
+                                "       dadata_enriched_at = COALESCE(dadata_enriched_at, NOW()) "
+                                " WHERE id = CAST(:hid AS bigint) "
+                                "   AND house_fias_id IS NULL"
+                            ),
+                            {
+                                "fias": dadata_fias,
+                                "qc_geo": dadata.qc_geo,
+                                "hid": target_house_id,
+                            },
+                        )
+                except Exception as exc:  # pragma: no cover — defensive
+                    logger.warning("estimate fias back-fill failed (graceful): %s", exc)
     except Exception as exc:  # pragma: no cover — defensive
         logger.warning("target house match failed (graceful): %s", exc)
 

tradein-mvp/backend/app/services/geocoder.py

@@ -324,6 +324,10 @@ class GeocodeSuggestion:
     lat: float
     lon: float
     kind: str  # 'house' / 'street' / 'locality'
+    # ГАР OBJECTGUID (ФИАС) дома — заполняется ТОЛЬКО для house-level кандидатов
+    # DaData-тира (fias_level 8/9). У Yandex/Nominatim/cadastral-тиров и у
+    # street/locality-кандидатов остаётся None (нет стабильного house-fias).
+    fias_id: str | None = None
 
 
 def _parse_yandex_members(members: list[dict]) -> list[GeocodeSuggestion]:
@@ -378,13 +382,18 @@ async def _dadata_suggest(query: str, limit: int = 8) -> list[GeocodeSuggestion]
     for s in raw:
         if s.lat is None or s.lon is None:
             continue
+        mapped_kind = _DADATA_KIND_MAP.get(s.kind, "locality")
+        # ФИАС отдаём наружу ТОЛЬКО для house-level кандидата (DaData kind='house'
+        # ⇔ fias_level 8/9). Для street/city/plot fias_id указывает не на дом —
+        # не годится как ключ матчинга целевого дома, оставляем None.
         out.append(
             GeocodeSuggestion(
                 label=s.value,
                 full_address=s.unrestricted_value,
                 lat=s.lat,
                 lon=s.lon,
-                kind=_DADATA_KIND_MAP.get(s.kind, "locality"),
+                kind=mapped_kind,
+                fias_id=s.fias_id if mapped_kind == "house" else None,
             )
         )
     return out

tradein-mvp/backend/app/services/matching/houses.py

@@ -1,10 +1,11 @@
-"""House cross-source matching — 3-tier algorithm.
+"""House cross-source matching — tiered algorithm.
 
-Tier 0 (confidence 1.0): cadastral_number exact match on houses table.
+Tier 0   (confidence 1.0):  cadastral_number exact match on houses table.
-Tier 1 (confidence 1.0): ext_source + ext_id already in house_sources.
+Tier 0.5 (confidence 0.95): house_fias_id (ГАР OBJECTGUID) exact match, case-insensitive.
-Tier 2 (confidence 0.9): address_fingerprint match in house_address_aliases.
+Tier 1   (confidence 1.0):  ext_source + ext_id already in house_sources.
-Tier 3 (confidence 0.7): geo-proximity within 30 m (PostGIS ST_DWithin).
+Tier 2   (confidence 0.9):  address_fingerprint match in house_address_aliases.
-New   (confidence 1.0): INSERT new canonical house.
+Tier 3   (confidence 0.7):  geo-proximity within 30 m (PostGIS ST_DWithin).
+New      (confidence 1.0):  INSERT new canonical house.
 
 Algorithm reference: decisions/Cross_Source_Matching_Strategy.md sec 3
 """
@@ -35,6 +36,7 @@ def match_or_create_house(
     year_built: int | None = None,
     building_cadastral_number: str | None = None,
     cadastral_number: str | None = None,
+    house_fias_id: str | None = None,
     source_url: str | None = None,
 ) -> tuple[int, float, str]:
     """Match existing house or create new canonical record.
@@ -45,13 +47,20 @@ def match_or_create_house(
     for an unknown address could both miss Tier 0-3 and each INSERT a duplicate
     house row. Closes finding #1 from 2026-05-24 audit.
 
+    Args:
+        house_fias_id: ГАР OBJECTGUID (UUID) of the building, when known upstream
+            (e.g. DaData /clean/address). Enables Tier 0.5 fias_exact — additive and
+            optional, existing callers are unaffected.
+
     Returns:
         (house_id, confidence ∈ [0.0, 1.0], method ∈ {
-            'cadastr_exact', 'source_exact', 'fingerprint', 'geo_proximity', 'new'
+            'cadastr_exact', 'fias_exact', 'source_exact', 'fingerprint',
+            'geo_proximity', 'new'
         })
 
     Method values:
         'cadastr_exact'  — matched by cadastral number (confidence 1.0)
+        'fias_exact'     — matched by house_fias_id (ГАР OBJECTGUID) (confidence 0.95)
         'source_exact'   — already in house_sources for this source+ext_id (confidence 1.0)
         'fingerprint'    — matched by address fingerprint (confidence 0.9)
         'geo_proximity'  — matched by geo within 30 m (confidence 0.7)
@@ -106,6 +115,35 @@ def match_or_create_house(
             logger.info("house match cadastr_exact house_id=%s cad=%s", house_id, cad)
             return (house_id, 1.0, "cadastr_exact")
 
+    # Tier 0.5: house_fias_id (ГАР OBJECTGUID) exact match, case-insensitive.
+    # Stable ORDER BY id so concurrent/duplicate rows resolve deterministically.
+    if house_fias_id:
+        row = (
+            db.execute(
+                text(
+                    "SELECT id FROM houses "
+                    "WHERE lower(house_fias_id) = lower(CAST(:fias AS text)) "
+                    "ORDER BY id ASC LIMIT 1"
+                ),
+                {"fias": house_fias_id},
+            )
+            .mappings()
+            .first()
+        )
+        if row:
+            house_id = int(row["id"])
+            _upsert_house_source(
+                db,
+                house_id=house_id,
+                ext_source=ext_source,
+                ext_id=ext_id,
+                method="fias_exact",
+                confidence=0.95,
+            )
+            _insert_alias(db, house_id=house_id, address=address, fp=fp, source=ext_source)
+            logger.info("house match fias_exact house_id=%s fias=%s", house_id, house_fias_id)
+            return (house_id, 0.95, "fias_exact")
+
     # Tier 1: source+ext_id already registered in house_sources
     row = (
         db.execute(
@@ -285,6 +323,7 @@ def match_house_readonly(
     lat: float | None = None,
     lon: float | None = None,
     cadastral_number: str | None = None,
+    house_fias_id: str | None = None,
 ) -> tuple[int, float, str] | None:
     """Match a target address to an EXISTING canonical house WITHOUT creating one.
 
@@ -295,9 +334,15 @@ def match_house_readonly(
 
     Tiers (same lookups as match_or_create_house, minus source_exact which needs an
     ext_id):
-      1. cadastr_exact  — houses.cadastral_number = :cad      (confidence 1.0)
+      0.  cadastr_exact  — houses.cadastral_number = :cad         (confidence 1.0)
-      2. fingerprint    — house_address_aliases.fingerprint   (confidence 0.9)
+      0.5 fias_exact     — houses.house_fias_id = :fias (ci)      (confidence 0.95)
-      3. geo_proximity  — within 50 m of an existing house     (confidence 0.7)
+      1.  fingerprint    — house_address_aliases.fingerprint      (confidence 0.9)
+      2.  geo_proximity  — within 50 m of an existing house        (confidence 0.7)
+
+    Args:
+        house_fias_id: ГАР OBJECTGUID (UUID) of the target building when known
+            (e.g. DaData /clean/address or a client-supplied target_fias_id).
+            Additive/optional — omitting it preserves prior behaviour exactly.
 
     Returns (house_id, confidence, method) or None if nothing confident matches.
     Uses 50 m for geo (vs 30 m in match_or_create_house) to absorb geocoder jitter
@@ -320,6 +365,27 @@ def match_house_readonly(
             )
             return (house_id, 1.0, "cadastr_exact")
 
+    # Tier 0.5: house_fias_id (ГАР OBJECTGUID) exact match, case-insensitive.
+    if house_fias_id:
+        row = (
+            db.execute(
+                text(
+                    "SELECT id FROM houses "
+                    "WHERE lower(house_fias_id) = lower(CAST(:fias AS text)) "
+                    "ORDER BY id ASC LIMIT 1"
+                ),
+                {"fias": house_fias_id},
+            )
+            .mappings()
+            .first()
+        )
+        if row:
+            house_id = int(row["id"])
+            logger.info(
+                "house readonly match fias_exact house_id=%s fias=%s", house_id, house_fias_id
+            )
+            return (house_id, 0.95, "fias_exact")
+
     # Tier 1: address fingerprint lookup
     fp = address_fingerprint(address, lat, lon)
     row = (

tradein-mvp/backend/data/sql/159_houses_fias_idx.sql

@@ -0,0 +1,26 @@
+-- 159_houses_fias_idx.sql
+-- Индекс под Tier 0.5 fias_exact матчинга домов (feat/tradein-fias-tier-matching).
+--
+-- WHY:
+--   houses.house_fias_id (ГАР OBJECTGUID, migration 070) теперь заполнен у ~5.1k
+--   из 11.8k домов (DaData backfill 2026-07-02). Матчинг-каскад получил новый
+--   tier `fias_exact` (services/matching/houses.py) с предикатом
+--   `lower(house_fias_id) = lower(:fias)`. Без функционального индекса каждый
+--   estimate/scrape делал бы seq-scan по houses.
+--
+-- SCOPE:
+--   Только создание partial functional index. Данные не трогаются.
+--
+-- IDEMPOTENCY / SAFETY:
+--   - BEGIN/COMMIT одной транзакцией.
+--   - CREATE INDEX IF NOT EXISTS → повторный прогон no-op (auto-apply strict).
+--   - Partial (WHERE house_fias_id IS NOT NULL) — не индексируем ~6.7k NULL-строк.
+--   - lower(...) выражение соответствует case-insensitive предикату матчера.
+
+BEGIN;
+
+CREATE INDEX IF NOT EXISTS houses_fias_lower_idx
+    ON houses (lower(house_fias_id))
+    WHERE house_fias_id IS NOT NULL;
+
+COMMIT;

tradein-mvp/backend/tests/test_matching.py

@@ -218,6 +218,59 @@ def test_match_house_tier0_cadastr():
     assert method == "cadastr_exact"
 
 
+def test_match_house_tier05_fias_exact():
+    """Tier 0.5: house_fias_id match → fias_exact (conf 0.95) before source/fp/geo.
+
+    No cadastral_number supplied → Tier 0 skipped; the fias SELECT is the first
+    lookup after the advisory lock. On hit, _upsert_house_source + _insert_alias
+    fire (address carries a house number so the alias is registered).
+    """
+    from app.services.matching.houses import match_or_create_house
+
+    db = _make_db(
+        [
+            None,  # pg_advisory_xact_lock
+            {"id": 55},  # fias_exact hit (Tier 0.5)
+            None,  # _upsert_house_source
+            None,  # _insert_alias
+        ]
+    )
+    house_id, conf, method = match_or_create_house(
+        db,
+        "avito",
+        "ext-fias-1",
+        address="ул Ленина 5",
+        lat=56.8,
+        lon=60.5,
+        house_fias_id="0a1b2c3d-0000-4000-8000-000000000001",
+    )
+    assert house_id == 55
+    assert conf == 0.95
+    assert method == "fias_exact"
+
+
+def test_match_house_fias_skipped_when_absent():
+    """No house_fias_id → Tier 0.5 does not run; first lookup is house_sources."""
+    from app.services.matching.houses import match_or_create_house
+
+    db = _make_db(
+        [
+            None,  # pg_advisory_xact_lock
+            {"house_id": 8},  # house_sources hit (fias tier skipped, no fias SELECT)
+        ]
+    )
+    house_id, _conf, method = match_or_create_house(
+        db,
+        "avito",
+        "ext-nofias",
+        address="пр Мира 10",
+        lat=56.8,
+        lon=60.5,
+    )
+    assert house_id == 8
+    assert method == "source_exact"
+
+
 def test_match_house_tier1_source_exact():
     """Tier 1: ext_source+ext_id already in house_sources.
 

tradein-mvp/backend/tests/test_same_building_match.py

@@ -66,6 +66,26 @@ def test_readonly_cadastr_exact_hit():
     assert result == (42, 1.0, "cadastr_exact")
 
 
+def test_readonly_fias_exact_hit():
+    """Tier 0.5: house_fias_id match → fias_exact (conf 0.95), no cad supplied."""
+    db = MagicMock()
+    db.execute.return_value.mappings.return_value.first.side_effect = [{"id": 55}]
+    result = match_house_readonly(
+        db,
+        address="ул Малышева 125",
+        house_fias_id="0a1b2c3d-0000-4000-8000-000000000001",
+    )
+    assert result == (55, 0.95, "fias_exact")
+
+
+def test_readonly_fias_skipped_when_absent():
+    """No house_fias_id → fias tier skipped; first .first() is fingerprint tier."""
+    db = MagicMock()
+    db.execute.return_value.mappings.return_value.first.side_effect = [{"house_id": 7}]
+    result = match_house_readonly(db, address="Екатеринбург, ул Малышева, д 125")
+    assert result == (7, 0.9, "fingerprint")
+
+
 def test_readonly_fingerprint_hit():
     db = MagicMock()
     # cadastral_number=None → cadastr tier skipped; first .first() is fingerprint

tradein-mvp/backend/tests/test_suggest_fias_contract.py

@@ -0,0 +1,123 @@
+"""Тесты контракта suggest→ФИАС (feat/tradein-fias-tier-matching).
+
+Покрывают:
+  1. geocoder._dadata_suggest — fias_id прокидывается ТОЛЬКО у house-level
+     кандидата (DaData kind='house' ⇔ fias_level 8/9); у street/city/plot None.
+  2. SuggestItem — сериализует fias_id (house-тир) и None у не-DaData тиров.
+  3. TradeInEstimateInput — принимает target_fias_id и дефолтит None при отсутствии.
+"""
+
+import os
+
+# Settings требует DATABASE_URL на импорте — ставим dummy DSN до app-импортов.
+os.environ.setdefault("DATABASE_URL", "postgresql+psycopg://test:test@localhost:5432/test")
+
+from unittest.mock import AsyncMock, patch
+
+from app.api.v1.geocode import SuggestItem
+from app.schemas.trade_in import TradeInEstimateInput
+from app.services.dadata import DadataSuggestion
+from app.services.geocoder import GeocodeSuggestion, _dadata_suggest
+
+
+def _sugg(kind: str, fias_id: str | None) -> DadataSuggestion:
+    return DadataSuggestion(
+        value=f"тест {kind}",
+        unrestricted_value=f"г Екатеринбург, тест {kind}",
+        lat=56.84,
+        lon=60.60,
+        fias_id=fias_id,
+        house="1" if kind == "house" else None,
+        street="Тестовая",
+        city="Екатеринбург",
+        kind=kind,
+    )
+
+
+# ── 1. _dadata_suggest: fias_id только у house-тира ──────────────────────────
+async def test_dadata_suggest_fias_only_for_house_kind():
+    raw = [
+        _sugg("house", "0a1b2c3d-0000-4000-8000-00000000aaaa"),
+        _sugg("street", "0a1b2c3d-0000-4000-8000-00000000bbbb"),
+        _sugg("city", "0a1b2c3d-0000-4000-8000-00000000cccc"),
+        _sugg("plot", "0a1b2c3d-0000-4000-8000-00000000dddd"),
+    ]
+    with patch(
+        "app.services.geocoder.dadata.suggest_addresses",
+        new=AsyncMock(return_value=raw),
+    ):
+        out = await _dadata_suggest("тест", limit=8)
+
+    assert len(out) == 4
+    house = next(s for s in out if s.kind == "house")
+    assert house.fias_id == "0a1b2c3d-0000-4000-8000-00000000aaaa"
+    # У всех НЕ-house тиров fias_id обнулён, даже если DaData его прислал.
+    for s in out:
+        if s.kind != "house":
+            assert s.fias_id is None
+
+
+async def test_dadata_suggest_house_without_fias_stays_none():
+    """house-кандидат без fias у DaData → fias_id None (не падаем)."""
+    with patch(
+        "app.services.geocoder.dadata.suggest_addresses",
+        new=AsyncMock(return_value=[_sugg("house", None)]),
+    ):
+        out = await _dadata_suggest("тест", limit=8)
+    assert len(out) == 1
+    assert out[0].fias_id is None
+
+
+# ── 2. SuggestItem сериализация ──────────────────────────────────────────────
+def test_suggest_item_serializes_fias_id():
+    item = SuggestItem(
+        label="ул Малышева, д 30",
+        full_address="г Екатеринбург, ул Малышева, д 30",
+        lat=56.84,
+        lon=60.60,
+        kind="house",
+        fias_id="0a1b2c3d-0000-4000-8000-00000000aaaa",
+    )
+    dumped = item.model_dump()
+    assert dumped["fias_id"] == "0a1b2c3d-0000-4000-8000-00000000aaaa"
+
+
+def test_suggest_item_fias_id_defaults_none_for_non_dadata_tier():
+    """Не-DaData тир (Yandex/Nominatim/cadastral) не передаёт fias_id → None."""
+    gs = GeocodeSuggestion(
+        label="Малышева 30",
+        full_address="г Екатеринбург, ул Малышева, д 30",
+        lat=56.84,
+        lon=60.60,
+        kind="house",
+    )
+    assert gs.fias_id is None
+    item = SuggestItem(
+        label=gs.label,
+        full_address=gs.full_address,
+        lat=gs.lat,
+        lon=gs.lon,
+        kind=gs.kind,
+        fias_id=gs.fias_id,
+    )
+    assert item.model_dump()["fias_id"] is None
+
+
+# ── 3. TradeInEstimateInput.target_fias_id ───────────────────────────────────
+def test_estimate_input_accepts_target_fias_id():
+    payload = TradeInEstimateInput(
+        address="ул Малышева 30, Екатеринбург",
+        area_m2=50.0,
+        rooms=2,
+        target_fias_id="0a1b2c3d-0000-4000-8000-00000000aaaa",
+    )
+    assert payload.target_fias_id == "0a1b2c3d-0000-4000-8000-00000000aaaa"
+
+
+def test_estimate_input_target_fias_id_defaults_none():
+    payload = TradeInEstimateInput(
+        address="ул Малышева 30, Екатеринбург",
+        area_m2=50.0,
+        rooms=2,
+    )
+    assert payload.target_fias_id is None