Allow setting the exchange explicitly

freqtrade/rpc/api_server/api_background_tasks.py

@@ -84,6 +84,10 @@ def pairlists_evaluate(payload: PairListsPayload, background_tasks: BackgroundTa
     config_loc = deepcopy(config)
     config_loc['stake_currency'] = payload.stake_currency
     config_loc['pairlists'] = payload.pairlists
+    if payload.exchange:
+        config_loc['exchange']['name'] = payload.exchange
+    if payload.trading_mode:
+        config_loc['trading_mode'] = payload.trading_mode
     # TODO: overwrite blacklist? make it optional and fall back to the one in config?
     # Outcome depends on the UI approach.
     config_loc['exchange']['pair_blacklist'] = payload.blacklist

freqtrade/rpc/api_server/api_schemas.py

@@ -432,6 +432,8 @@ class PairListsPayload(BaseModel):
     pairlists: List[Dict[str, Any]]
     blacklist: List[str]
     stake_currency: str
+    trading_mode: Optional[TradingMode]
+    exchange: Optional[str]
 
 
 class FreqAIModelListResponse(BaseModel):

tests/rpc/test_rpc_apiserver.py

@@ -1645,7 +1645,7 @@ def test_api_pairlists_available(botclient, tmpdir):
     assert len(volumepl['params']) > 2
 
 
-def test_api_pairlists_evaluate(botclient, tmpdir):
+def test_api_pairlists_evaluate(botclient, tmpdir, mocker):
     ftbot, client = botclient
     ftbot.config['user_data_dir'] = Path(tmpdir)
 
@@ -1709,6 +1709,24 @@ def test_api_pairlists_evaluate(botclient, tmpdir):
     response = rc.json()
     assert response['result']['whitelist'] == ['ETH/BTC', 'LTC/BTC', ]
     assert response['result']['length'] == 2
+    # Patch __run_pairlists
+    plm = mocker.patch('freqtrade.rpc.api_server.api_background_tasks.__run_pairlist', return_value=None)
+    body = {
+        "pairlists": [
+            {"method": "StaticPairList", },
+        ],
+        "blacklist": [
+        ],
+        "stake_currency": "BTC",
+        "exchange": "randomExchange",
+        "trading_mode": "futures",
+    }
+    rc = client_post(client, f"{BASE_URI}/pairlists/evaluate", body)
+    assert_response(rc)
+    assert plm.call_count == 1
+    call_config = plm.call_args_list[0][0][1]
+    assert call_config['exchange']['name'] == 'randomExchange'
+    assert call_config['trading_mode'] == 'futures'
 
 
 def test_list_available_pairs(botclient):