Turns out: The CCXT ids can be literally anything

fin_defs/__init__.py

@@ -268,11 +268,6 @@ class CryptoCurrency(Currency):
     ccxt_symbol: str
     coingecko_id: str | None = None
 
-    def __post_init__(self) -> None:
-        if not re.match(r'^\S.*\S$', self.ccxt_symbol):
-            msg = f'ccxt_symbol was not in correct format: {self.ccxt_symbol}'
-            raise ValueError(msg)
-
     def raw_short_name(self) -> str:
         return self.ccxt_symbol
 

test/test_ids.py

@@ -17,6 +17,7 @@ VALID_IDS = [
     'crypto:LOLCOIN',
     'commodity:ALUMINUM',
     'unknown:XXX',
+    'crypto:    ', # CCXT actually found one with only whitespace. Why?
 ]
 
 
@@ -41,7 +42,6 @@ INVALID_IDS = [
     'fiat:TEST:TEST',
     'index:TEST:TEST',
     'commodity:TEST:TEST',
-    'crypto:    ',
     '!!!!',
     '::::',
     '',