trade_history should paginate through results

this avoids huge results

freqtrade/rpc/api_server/api_schemas.py

@@ -199,6 +199,7 @@ class OpenTradeSchema(TradeSchema):
 class TradeResponse(BaseModel):
     trades: List[TradeSchema]
     trades_count: int
+    total_trades: int
 
 
 class ForceBuyResponse(BaseModel):

freqtrade/rpc/api_server/api_v1.py

@@ -85,8 +85,8 @@ def status(rpc: RPC = Depends(get_rpc)):
 # Using the responsemodel here will cause a ~100% increase in response time (from 1s to 2s)
 # on big databases. Correct response model: response_model=TradeResponse,
 @router.get('/trades', tags=['info', 'trading'])
-def trades(limit: int = 0, rpc: RPC = Depends(get_rpc)):
-    return rpc._rpc_trade_history(limit)
+def trades(limit: int = 500, offset: int = 0, rpc: RPC = Depends(get_rpc)):
+    return rpc._rpc_trade_history(min(limit, 500), offset=offset, order_by_id=True)
 
 
 @router.get('/trade/{tradeid}', response_model=OpenTradeSchema, tags=['info', 'trading'])

freqtrade/rpc/rpc.py

@@ -300,11 +300,12 @@ class RPC:
             'data': data
         }
 
-    def _rpc_trade_history(self, limit: int) -> Dict:
+    def _rpc_trade_history(self, limit: int, offset: int = 0, order_by_id: bool = False) -> Dict:
         """ Returns the X last trades """
-        if limit > 0:
+        order_by = Trade.id if order_by_id else Trade.close_date.desc()
+        if limit:
             trades = Trade.get_trades([Trade.is_open.is_(False)]).order_by(
-                Trade.close_date.desc()).limit(limit)
+                order_by).limit(limit).offset(offset)
         else:
             trades = Trade.get_trades([Trade.is_open.is_(False)]).order_by(
                 Trade.close_date.desc()).all()
@@ -313,7 +314,8 @@ class RPC:
 
         return {
             "trades": output,
-            "trades_count": len(output)
+            "trades_count": len(output),
+            "total_trades": Trade.get_trades([Trade.is_open.is_(False)]).count(),
         }
 
     def _rpc_stats(self) -> Dict[str, Any]: