Expose default currency precision to API

freqtrade/rpc/api_server/api_schemas.py

@@ -115,6 +115,7 @@ class ShowConfig(BaseModel):
     dry_run: bool
     stake_currency: str
     stake_amount: Union[float, str]
+    stake_currency_decimals: int
     max_open_trades: int
     minimal_roi: Dict[str, Any]
     stoploss: float

freqtrade/rpc/rpc.py

@@ -18,7 +18,7 @@ from freqtrade.enums import SellType, State
 from freqtrade.exceptions import ExchangeError, PricingError
 from freqtrade.exchange import timeframe_to_minutes, timeframe_to_msecs
 from freqtrade.loggers import bufferHandler
-from freqtrade.misc import shorten_date
+from freqtrade.misc import decimals_per_coin, shorten_date
 from freqtrade.persistence import PairLocks, Trade
 from freqtrade.persistence.models import PairLock
 from freqtrade.plugins.pairlist.pairlist_helpers import expand_pairlist
@@ -104,6 +104,7 @@ class RPC:
         val = {
             'dry_run': config['dry_run'],
             'stake_currency': config['stake_currency'],
+            'stake_currency_decimals':  decimals_per_coin(config['stake_currency']),
             'stake_amount': config['stake_amount'],
             'max_open_trades': (config['max_open_trades']
                                 if config['max_open_trades'] != float('inf') else -1),