fix: round website rates to two decimals

backend/app/routers/websites.py

@@ -45,6 +45,7 @@ from app.services.website_sync import (
     sync_account_priorities_for_upstream,
 )
 from app.utils.auth import get_current_user
+from app.utils.number import fixed_decimal_number
 
 router = APIRouter(tags=["websites"])
 logger = logging.getLogger(__name__)
@@ -339,7 +340,7 @@ def import_groups_from_upstream(
                 "name": target_name,
                 "description": group.get("description") or f"Imported from {upstream.name} / {source_name}",
                 "platform": group.get("platform") or "openai",
-                "rate_multiplier": _source_group_rate(group),
+                "rate_multiplier": fixed_decimal_number(_source_group_rate(group), 2),
             }
             if group.get("rpm_limit") is not None:
                 create_body["rpm_limit"] = group.get("rpm_limit")

backend/app/services/website_client.py

@@ -7,7 +7,7 @@ from urllib.parse import quote
 
 import httpx
 
-from app.utils.number import decimal_string
+from app.utils.number import fixed_decimal_number, fixed_decimal_string
 
 logger = logging.getLogger(__name__)
 
@@ -67,7 +67,7 @@ def calculate_target_rate(values: list[Any], percent: Any = 0, algorithm: str =
     pct = Decimal(str(percent or 0))
     if pct < 0:
         raise WebsiteError("百分比不能为负数")
-    return (base * (Decimal("1") + pct / Decimal("100"))).quantize(Decimal("0.0001"), rounding=ROUND_HALF_UP)
+    return (base * (Decimal("1") + pct / Decimal("100"))).quantize(Decimal("0.01"), rounding=ROUND_HALF_UP)
 
 
 def _unwrap_data(value: Any) -> Any:
@@ -122,7 +122,7 @@ def normalize_groups(value: Any) -> list[dict[str, Any]]:
         groups.append({
             "id": str(gid),
             "name": str(name),
-            "rate_multiplier": decimal_string(rate) if rate is not None else None,
+            "rate_multiplier": fixed_decimal_string(rate, 2) if rate is not None else None,
             "raw": item,
         })
     return groups
@@ -209,9 +209,9 @@ class Sub2ApiWebsiteClient:
         msg = str(last_error) if last_error else "拉取分组失败"
         raise WebsiteError(f"{msg}（尝试接口：{'、'.join(tried_paths)}）")
 
-    def update_group_rate(self, endpoint_template: str, group_id: str, rate: Decimal) -> Any:
+    def update_group_rate(self, endpoint_template: str, group_id: str, rate: Any) -> Any:
         path = endpoint_template.replace("{id}", quote(group_id, safe=""))
-        return self._request("PUT", path, {"rate_multiplier": float(rate)})
+        return self._request("PUT", path, {"rate_multiplier": fixed_decimal_number(rate, 2)})
 
     def create_group(self, body: dict[str, Any], endpoint: str = "/groups") -> dict[str, Any]:
         resp = self._request("POST", endpoint, body)

backend/app/services/website_sync.py

@@ -11,9 +11,10 @@ from app.models.snapshot import UpstreamRateSnapshot
 from app.models.upstream import Upstream
 from app.models.upstream_key import UpstreamGeneratedKey
 from app.models.website import Website, WebsiteGroupBinding, WebsiteSyncLog
-from app.services.website_client import Sub2ApiWebsiteClient, WebsiteError, _extract_id, calculate_target_rate, decimal_string
+from app.services.website_client import Sub2ApiWebsiteClient, WebsiteError, _extract_id, calculate_target_rate
 from app.services.upstream_client import UpstreamClient
 from app.services import webhook_service
+from app.utils.number import fixed_decimal_string
 
 logger = logging.getLogger(__name__)
 
@@ -91,8 +92,8 @@ def _log(
         algorithm=binding.algorithm,
         percent=binding.percent,
         source_rates_json=json.dumps(source_rates, ensure_ascii=False),
-        old_rate=decimal_string(old_rate) if old_rate not in (None, "") else None,
+        old_rate=fixed_decimal_string(old_rate, 2) if old_rate not in (None, "") else None,
-        new_rate=decimal_string(new_rate) if new_rate not in (None, "") else None,
+        new_rate=fixed_decimal_string(new_rate, 2) if new_rate not in (None, "") else None,
         status=status,
         message=message,
     )
@@ -147,7 +148,11 @@ def sync_binding(db: Session, binding: WebsiteGroupBinding, write: bool = True)
                 groups = client.get_groups(website.groups_endpoint)
                 target = next((item for item in groups if item.get("id") == binding.target_group_id), None)
                 old_rate = target.get("rate_multiplier") if target else None
-                client.update_group_rate(website.group_update_endpoint, binding.target_group_id, target_rate)
+                client.update_group_rate(
+                    website.group_update_endpoint,
+                    binding.target_group_id,
+                    target_rate,
+                )
             website.last_status = "healthy"
             website.last_error = None
         except Exception as exc:
@@ -157,8 +162,8 @@ def sync_binding(db: Session, binding: WebsiteGroupBinding, write: bool = True)
             return _log(db, binding, website, source_rates, "failed", f"写回失败：{exc}", old_rate, target_rate)
         db.commit()
         log = _log(db, binding, website, source_rates, "success", "同步成功", old_rate, target_rate)
-        old_rate_str = decimal_string(old_rate) if old_rate not in (None, "") else None
+        old_rate_str = fixed_decimal_string(old_rate, 2) if old_rate not in (None, "") else None
-        new_rate_str = decimal_string(target_rate)
+        new_rate_str = fixed_decimal_string(target_rate, 2)
         if old_rate_str != new_rate_str:
             webhook_service.send_website_rate_changed(
                 db,

backend/app/utils/number.py

@@ -1,7 +1,7 @@
 """Shared numeric formatting utilities."""
 from __future__ import annotations
 
-from decimal import Decimal, InvalidOperation
+from decimal import Decimal, InvalidOperation, ROUND_HALF_UP
 from typing import Any
 
 
@@ -23,3 +23,20 @@ def decimal_string(value: Any) -> str:
     if n == n.to_integral():
         return str(n.quantize(Decimal("1")))
     return format(n, "f")
+
+
+def fixed_decimal_string(value: Any, places: int = 2) -> str:
+    """Format a numeric value with a fixed number of decimal places."""
+    if value is None or value == "":
+        return ""
+    try:
+        d = Decimal(str(value))
+    except (InvalidOperation, ValueError):
+        return str(value)
+    quantum = Decimal("1").scaleb(-places)
+    return format(d.quantize(quantum, rounding=ROUND_HALF_UP), f".{places}f")
+
+
+def fixed_decimal_number(value: Any, places: int = 2) -> float:
+    """Round a numeric value to a fixed precision for JSON number payloads."""
+    return float(fixed_decimal_string(value, places))

backend/test_group_binding_create_sync.py

@@ -129,12 +129,12 @@ def test_create_binding_runs_initial_sync(monkeypatch, db_session):
     )
 
     assert result.target_group_id == "target"
-    assert calls == [("/groups/{id}", "target", "2.2000")]
+    assert calls == [("/groups/{id}", "target", "2.20")]
     log = db_session.query(WebsiteSyncLog).one()
     assert log.status == "success"
     assert log.message == "同步成功"
-    assert log.old_rate == "1"
+    assert log.old_rate == "1.00"
-    assert log.new_rate == "2.2"
+    assert log.new_rate == "2.20"
 
 
 def test_create_binding_skips_write_when_website_auto_sync_disabled(db_session):
@@ -152,7 +152,7 @@ def test_create_binding_skips_write_when_website_auto_sync_disabled(db_session):
     assert log.status == "success"
     assert log.message == "网站未启用自动同步，未写回"
     assert log.old_rate is None
-    assert log.new_rate == "2.2"
+    assert log.new_rate == "2.20"
 
 
 def test_create_binding_skips_write_when_binding_disabled(db_session):
@@ -168,7 +168,7 @@ def test_create_binding_skips_write_when_binding_disabled(db_session):
     log = db_session.query(WebsiteSyncLog).one()
     assert log.status == "success"
     assert log.message == "绑定未启用，未写回"
-    assert log.new_rate == "2.2"
+    assert log.new_rate == "2.20"
 
 
 def test_create_binding_keeps_binding_when_initial_sync_calculation_fails(db_session):
@@ -241,11 +241,11 @@ def test_update_binding_runs_sync_after_save(monkeypatch, db_session):
     )
 
     assert result.target_group_id == "target"
-    assert calls == [("/groups/{id}", "target", "2.4000")]
+    assert calls == [("/groups/{id}", "target", "2.40")]
     log = db_session.query(WebsiteSyncLog).one()
     assert log.status == "success"
     assert log.message == "同步成功"
-    assert log.new_rate == "2.4"
+    assert log.new_rate == "2.40"
 
 
 def test_update_binding_skips_write_when_disabled(monkeypatch, db_session):
@@ -339,8 +339,8 @@ def test_create_binding_notifies_when_website_rate_changes(monkeypatch, db_sessi
     _, payload = sent_payloads[0]
     assert payload["event"] == "website_rate_changed"
     assert payload["website"]["id"] == website.id
-    assert payload["target_group"]["old_rate"] == "1"
+    assert payload["target_group"]["old_rate"] == "1.00"
-    assert payload["target_group"]["new_rate"] == "2.2"
+    assert payload["target_group"]["new_rate"] == "2.20"
     log = db_session.query(NotificationLog).one()
     assert log.event_type == "website_rate_changed"
     assert log.status == "success"

backend/test_website_client.py

@@ -1,3 +1,5 @@
+from decimal import Decimal
+
 import httpx
 import pytest
 
@@ -5,6 +7,7 @@ from app.services.website_client import (
     WebsiteError,
     _friendly_connection_error,
     _friendly_http_error,
+    calculate_target_rate,
     normalize_groups,
 )
 
@@ -28,8 +31,8 @@ def test_normalize_groups_unwraps_sub2api_paginated_response():
     })
 
     assert [group["id"] for group in groups] == ["codex-free", "my-plus", "deepseek"]
-    assert groups[0]["rate_multiplier"] == "1"
+    assert groups[0]["rate_multiplier"] == "1.00"
-    assert groups[1]["rate_multiplier"] == "1.5"
+    assert groups[1]["rate_multiplier"] == "1.50"
     assert groups[2]["rate_multiplier"] is None
 
 
@@ -45,7 +48,7 @@ def test_normalize_groups_unwraps_wrapped_list_response():
     assert groups == [{
         "id": "default",
         "name": "Default",
-        "rate_multiplier": "2",
+        "rate_multiplier": "2.00",
         "raw": {"id": "default", "name": "Default", "rateMultiplier": "2.0"},
     }]
 
@@ -78,7 +81,43 @@ def test_normalize_groups_keeps_plain_dict_mapping_compatibility():
     })
 
     assert [group["id"] for group in groups] == ["free", "paid"]
-    assert groups[0]["rate_multiplier"] == "1"
+    assert groups[0]["rate_multiplier"] == "1.00"
+
+
+def test_update_group_rate_writes_rounded_two_decimal_number():
+    from app.services.website_client import Sub2ApiWebsiteClient
+
+    requests = []
+
+    def handler(req: httpx.Request) -> httpx.Response:
+        requests.append(req)
+        return httpx.Response(200, json={"ok": True}, request=req)
+
+    client = Sub2ApiWebsiteClient(
+        base_url="https://target.example",
+        api_prefix="/api/v1/admin",
+        auth_type="api_key",
+        auth_config={"key": "admin-key"},
+    )
+    client._client = httpx.Client(transport=httpx.MockTransport(handler))
+
+    try:
+        client.update_group_rate("/groups/{id}", "vip", Decimal("2.2"))
+        client.update_group_rate("/groups/{id}", "free", Decimal("1"))
+        client.update_group_rate("/groups/{id}", "small", Decimal("0.1275"))
+    finally:
+        client.close()
+
+    assert requests[0].url.path == "/api/v1/admin/groups/vip"
+    assert requests[0].read() == b'{"rate_multiplier":2.2}'
+    assert requests[1].url.path == "/api/v1/admin/groups/free"
+    assert requests[1].read() == b'{"rate_multiplier":1.0}'
+    assert requests[2].url.path == "/api/v1/admin/groups/small"
+    assert requests[2].read() == b'{"rate_multiplier":0.13}'
+
+
+def test_calculate_target_rate_rounds_to_two_decimal_places():
+    assert calculate_target_rate(["0.1275"], 0, "max_plus_percent") == Decimal("0.13")
 
 
 # ——— _get_account_ids / account_exists ———