public static function importSignatureSecretKey(HiddenString $keyData): SignatureSecretKey
    {
        return new SignatureSecretKey(
            new HiddenString(
                self::getKeyDataFromString(
                    Hex::decode($keyData->getString())
                )
            )
        );
    }
public static function importSignatureSecretKey(HiddenString $keyData): SignatureSecretKey
    {
        return new SignatureSecretKey(
            new HiddenString(
                self::getKeyDataFromString(
                    Hex::decode($keyData->getString())
                )
            )
        );
    }
public static function importSignatureSecretKey ( HiddenString $ keyData ) : SignatureSecretKey { return new SignatureSecretKey ( new HiddenString ( self :: getKeyDataFromString ( Hex :: decode ( $ keyData -> getString ( ) ) ) ) ) ; }
Load, specifically, a signature secret key from a string

@param HiddenString $keyData
@return SignatureSecretKey

@throws InvalidKey
@throws \TypeError
Load specifically a signature secret key from a string