strip0x function
Strip the '0x' prefix from a hexadecimal string. This function takes a hexadecimal string 'hex' and removes the '0x' prefix if it exists. It returns the string with the prefix removed or the original string if no prefix is present.
Implementation
String strip0x(String hex) {
if (hex.startsWith('0x')) {
/// If the string starts with '0x', remove the prefix.
return hex.substring(2);
}
/// If no '0x' prefix is found, return the original string.
return hex;
}