From b58e4129827cf6d46675d43f2e2629227e89662e Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Wed, 3 Jul 2024 13:34:00 +0200
Subject: [PATCH] feat: Add "DEX" output for `list- exchanges` subcommand

---
 freqtrade/commands/list_commands.py     |  3 ++-
 freqtrade/exchange/check_exchange.py    |  2 +-
 freqtrade/exchange/exchange_utils.py    | 14 +++++++++-----
 freqtrade/types/valid_exchanges_type.py |  1 +
 4 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/freqtrade/commands/list_commands.py b/freqtrade/commands/list_commands.py
index 257166f9c..3a542226c 100644
--- a/freqtrade/commands/list_commands.py
+++ b/freqtrade/commands/list_commands.py
@@ -45,7 +45,8 @@ def start_list_exchanges(args: Dict[str, Any]) -> None:
                 "name": exchange["name"],
                 **valid_entry,
                 "supported": "Official" if exchange["supported"] else "",
-                "trade_modes": ", ".join(
+                "trade_modes": ("DEX: " if exchange["dex"] else "")
+                + ", ".join(
                     (f"{a['margin_mode']} " if a["margin_mode"] else "") + a["trading_mode"]
                     for a in exchange["trade_modes"]
                 ),
diff --git a/freqtrade/exchange/check_exchange.py b/freqtrade/exchange/check_exchange.py
index 73b1c8a97..6d82bae04 100644
--- a/freqtrade/exchange/check_exchange.py
+++ b/freqtrade/exchange/check_exchange.py
@@ -47,7 +47,7 @@ def check_exchange(config: Config, check_for_bad: bool = True) -> bool:
             f'{", ".join(available_exchanges())}'
         )
 
-    valid, reason = validate_exchange(exchange)
+    valid, reason, _ = validate_exchange(exchange)
     if not valid:
         if check_for_bad:
             raise OperationalException(
diff --git a/freqtrade/exchange/exchange_utils.py b/freqtrade/exchange/exchange_utils.py
index dcae1ab3b..15555248b 100644
--- a/freqtrade/exchange/exchange_utils.py
+++ b/freqtrade/exchange/exchange_utils.py
@@ -53,16 +53,19 @@ def available_exchanges(ccxt_module: Optional[CcxtModuleType] = None) -> List[st
     return [x for x in exchanges if validate_exchange(x)[0]]
 
 
-def validate_exchange(exchange: str) -> Tuple[bool, str]:
+def validate_exchange(exchange: str) -> Tuple[bool, str, bool]:
     """
     returns: can_use, reason
         with Reason including both missing and missing_opt
     """
     ex_mod = getattr(ccxt, exchange.lower())()
+
+    if not ex_mod or not ex_mod.has:
+        return False, "", False
+
     result = True
     reason = ""
-    if not ex_mod or not ex_mod.has:
-        return False, ""
+    is_dex = getattr(ex_mod, "dex", False)
     missing = [
         k
         for k, v in EXCHANGE_HAS_REQUIRED.items()
@@ -81,18 +84,19 @@ def validate_exchange(exchange: str) -> Tuple[bool, str]:
     if missing_opt:
         reason += f"{'. ' if reason else ''}missing opt: {', '.join(missing_opt)}. "
 
-    return result, reason
+    return result, reason, is_dex
 
 
 def _build_exchange_list_entry(
     exchange_name: str, exchangeClasses: Dict[str, Any]
 ) -> ValidExchangesType:
-    valid, comment = validate_exchange(exchange_name)
+    valid, comment, is_dex = validate_exchange(exchange_name)
     result: ValidExchangesType = {
         "name": exchange_name,
         "valid": valid,
         "supported": exchange_name.lower() in SUPPORTED_EXCHANGES,
         "comment": comment,
+        "dex": is_dex,
         "trade_modes": [{"trading_mode": "spot", "margin_mode": ""}],
     }
     if resolved := exchangeClasses.get(exchange_name.lower()):
diff --git a/freqtrade/types/valid_exchanges_type.py b/freqtrade/types/valid_exchanges_type.py
index c01149455..9de05b964 100644
--- a/freqtrade/types/valid_exchanges_type.py
+++ b/freqtrade/types/valid_exchanges_type.py
@@ -14,4 +14,5 @@ class ValidExchangesType(TypedDict):
     valid: bool
     supported: bool
     comment: str
+    dex: bool
     trade_modes: List[TradeModeType]