Introduce round_coin_value to simplify coin rounding

freqtrade/misc.py

@@ -11,10 +11,35 @@ from typing.io import IO
 
 import rapidjson
 
+from freqtrade.constants import DECIMAL_PER_COIN_FALLBACK, DECIMALS_PER_COIN
+
 
 logger = logging.getLogger(__name__)
 
 
+def decimals_per_coin(coin: str):
+    """
+    Helper method getting decimal amount for this coin
+    example usage: f".{decimals_per_coin('USD')}f"
+    :param coin: Which coin are we printing the price / value for
+    """
+    return DECIMALS_PER_COIN.get(coin, DECIMAL_PER_COIN_FALLBACK)
+
+
+def round_coin_value(value: float, coin: str, show_coin_name=True) -> str:
+    """
+    Get price value for this coin
+    :param value: Value to be printed
+    :param coin: Which coin are we printing the price / value for
+    :param show_coin_name: Return string in format: "222.22 USDT" or "222.22"
+    :return: Formatted / rounded value (with or without coin name)
+    """
+    if show_coin_name:
+        return f"{value:.{decimals_per_coin(coin)}f} {coin}"
+    else:
+        return f"{value:.{decimals_per_coin(coin)}f}"
+
+
 def shorten_date(_date: str) -> str:
     """
     Trim the date so it fits on small screens