feat(mcp-deribit): testnet resolver + environment_info tool + env override

services/mcp-deribit/src/mcp_deribit/server.py

@@ -4,6 +4,7 @@ import os
 
 from fastapi import Depends, FastAPI, HTTPException
 from mcp_common.auth import Principal, TokenStore, require_principal
+from mcp_common.environment import EnvironmentInfo
 from mcp_common.mcp_bridge import mount_mcp_endpoint
 from mcp_deribit.leverage_cap import enforce_leverage as _enforce_leverage
 from mcp_deribit.leverage_cap import get_max_leverage
@@ -219,7 +220,13 @@ def _check(principal: Principal, *, core: bool = False, observer: bool = False)
 
 # --- App factory ---
 
-def create_app(*, client: DeribitClient, token_store: TokenStore, creds: dict) -> FastAPI:
+def create_app(
+    *,
+    client: DeribitClient,
+    token_store: TokenStore,
+    creds: dict,
+    env_info: EnvironmentInfo | None = None,
+) -> FastAPI:
     from contextlib import asynccontextmanager
 
     cap_default = get_max_leverage(creds)
@@ -248,6 +255,27 @@ def create_app(*, client: DeribitClient, token_store: TokenStore, creds: dict) -
         _check(principal, core=True, observer=True)
         return client.is_testnet()
 
+    @app.post("/tools/environment_info", tags=["reads"])
+    async def t_environment_info(principal: Principal = Depends(require_principal)):
+        _check(principal, core=True, observer=True)
+        if env_info is None:
+            return {
+                "exchange": "deribit",
+                "environment": "testnet" if client.is_testnet().get("testnet") else "mainnet",
+                "source": "credentials",
+                "env_value": None,
+                "base_url": client.base_url,
+                "max_leverage": get_max_leverage(creds),
+            }
+        return {
+            "exchange": env_info.exchange,
+            "environment": env_info.environment,
+            "source": env_info.source,
+            "env_value": env_info.env_value,
+            "base_url": env_info.base_url,
+            "max_leverage": get_max_leverage(creds),
+        }
+
     @app.post("/tools/get_ticker", tags=["reads"])
     async def t_get_ticker(
         body: GetTickerReq, principal: Principal = Depends(require_principal)
@@ -487,6 +515,7 @@ def create_app(*, client: DeribitClient, token_store: TokenStore, creds: dict) -
         internal_base_url=f"http://localhost:{port}",
         tools=[
             {"name": "is_testnet", "description": "True se client Deribit è in modalità testnet."},
+            {"name": "environment_info", "description": "Ambiente operativo (testnet/mainnet), source, base_url, max_leverage cap."},
             {"name": "get_ticker", "description": "Ticker di un instrument Deribit."},
             {"name": "get_ticker_batch", "description": "Ticker per N instruments in parallelo (max 20)."},
             {"name": "get_instruments", "description": "Lista instruments per currency."},