BTW if you want to test out the sendwithmessage option, try this on your Linux machine:
git clone https://github.com/tutor-web/smileyCoin
cd smileyCoin
git checkout sendwithmessage
./autogen.sh
./configure --without-gui
make
cd
Now you're all set and you can see how the new option works with
~/smileyCoin/src/smileycoind help sendwithmessage
To actually send a message, use a command like
~/smileyCoin/src/smileycoind sendwithmessage BSXZB28C2xZMT5Nxt9sAFRSdzntshfwrqP 4500 "Hello world"
The exact command above has been used before and you can see what it did by looking at the corresponding transaction,
https://chainz.cryptoid.info/smly/tx.dws?1ac2b6b7b6729da640d57727ec2a4bccbee65ad810013169c714cbae22d8185e.htm
The document in the previous message describes the coding used and explains the meaning of the various parts of the transaction.
Currently we are thinking about whether one should use this as a general tool for messaging (using encryption) and/or whether this approach can be used
as a part of cross-chain atomic swap schemes.
As usual we are looking for people willing to help with testing, provide feedback or add programming features