Readme

README.md

@@ -164,6 +164,7 @@ There are few utilities available with this package:
 - Balance changes
 - Flags
 - UNLReport Flag Ledger
+- Currency dode to readable currency code
 
 ### Flags
 
@@ -191,6 +192,24 @@ UNLReportFlagLedger::next(6873600);          //6873856
 UNLReportFlagLedger::nextOrCurrent(6873600); //6873600
 ```
 
+### Util class
+Converts Currency Code ISO or HEX to human readable representation.  
+
+```PHP
+use XRPLWin\XRPL\Utilities\Util;
+#Syntax: Util::currencyToSymbol(string $ISO_or_HEX, $malformedUtf8ReturnString = '?')
+
+//ISO Currency Code
+Util::currencyToSymbol('EUR') //EUR 
+//Deprecated Demurrage Currency Code
+Util::currencyToSymbol('0158415500000000C1F76FF6ECB0BAC600000000') //XAU (-0.5% pa)
+//Nonstandard Currency Code
+Util::currencyToSymbol('534F4C4F00000000000000000000000000000000') //SOLO
+```
+Read more:
+- https://xrpl.org/docs/references/protocol/data-types/currency-formats/#currency-formats
+- https://xrpl.org/docs/concepts/tokens/fungible-tokens/demurrage/
+
 ## Running tests
 Run all tests in "tests" directory.
 ```

src/Utilities/Util.php

@@ -14,7 +14,7 @@ final class Util
   * @see https://3v4l.org/Mp2Fu
   * @return string
   */
-  public static function currencyToSymbol($currencycode, $malformedUtf8ReturnString = '?') : string
+  public static function currencyToSymbol(string $currencycode, string $malformedUtf8ReturnString = '?') : string
   {
     if( \strlen($currencycode) == 40 )
     {