From e6176d43f3b631b6969978274baef77178f2b905 Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Sat, 2 Jan 2021 13:12:49 +0100
Subject: [PATCH] Optional RPC dependency

---
 freqtrade/rpc/api_server/api_v1.py    |  9 ++++++---
 freqtrade/rpc/api_server/deps.py      | 18 ++++++++++++++----
 freqtrade/rpc/api_server/webserver.py |  1 +
 3 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/freqtrade/rpc/api_server/api_v1.py b/freqtrade/rpc/api_server/api_v1.py
index 614563d01..ddca88b06 100644
--- a/freqtrade/rpc/api_server/api_v1.py
+++ b/freqtrade/rpc/api_server/api_v1.py
@@ -18,7 +18,7 @@ from freqtrade.rpc.api_server.api_schemas import (AvailablePairs, Balances, Blac
                                                   StatusMsg, StrategyListResponse, StrategyResponse,
                                                   TradeResponse, TradeSchema, Version,
                                                   WhitelistResponse)
-from freqtrade.rpc.api_server.deps import get_config, get_rpc
+from freqtrade.rpc.api_server.deps import get_config, get_rpc, get_rpc_optional
 from freqtrade.rpc.rpc import RPCException
 
 
@@ -100,8 +100,11 @@ def edge(rpc: RPC = Depends(get_rpc)):
 
 # TODO: Missing response model
 @router.get('/show_config', tags=['info'])
-def show_config(rpc: RPC = Depends(get_rpc), config=Depends(get_config)):
-    return RPC._rpc_show_config(config, rpc._freqtrade.state)
+def show_config(rpc: Optional[RPC] = Depends(get_rpc_optional), config=Depends(get_config)):
+    state = ''
+    if rpc:
+        state = rpc._freqtrade.state
+    return RPC._rpc_show_config(config, state)
 
 
 @router.post('/forcebuy', response_model=Union[TradeSchema, StatusMsg], tags=['trading'])
diff --git a/freqtrade/rpc/api_server/deps.py b/freqtrade/rpc/api_server/deps.py
index ce6fbf4aa..d2459010f 100644
--- a/freqtrade/rpc/api_server/deps.py
+++ b/freqtrade/rpc/api_server/deps.py
@@ -1,12 +1,22 @@
-from typing import Any, Dict
+from typing import Any, Dict, Optional
 
-from freqtrade.rpc.rpc import RPC
+from freqtrade.rpc.rpc import RPC, RPCException
 
 from .webserver import ApiServer
 
 
-def get_rpc() -> RPC:
-    return ApiServer._rpc
+def get_rpc_optional() -> Optional[RPC]:
+    if ApiServer._has_rpc:
+        return ApiServer._rpc
+    return None
+
+
+def get_rpc() -> Optional[RPC]:
+    _rpc = get_rpc_optional()
+    if _rpc:
+        return _rpc
+    else:
+        raise RPCException('Bot is not in the correct state')
 
 
 def get_config() -> Dict[str, Any]:
diff --git a/freqtrade/rpc/api_server/webserver.py b/freqtrade/rpc/api_server/webserver.py
index ac7a35a9e..a475ad494 100644
--- a/freqtrade/rpc/api_server/webserver.py
+++ b/freqtrade/rpc/api_server/webserver.py
@@ -17,6 +17,7 @@ logger = logging.getLogger(__name__)
 class ApiServer(RPCHandler):
 
     _rpc: RPC
+    _has_rpc: bool = False
     _config: Dict[str, Any] = {}
 
     def __init__(self, rpc: RPC, config: Dict[str, Any]) -> None: