Quote from: JustOne on February 24, 2014, 06:49:33 PM

Hi,

Similar to a recently asked "max number of coins per transaction" question, I'm asking about the theoretical "min number," for a specific reason. This may have been discussed already but I was unable to find anything in the search results.

Before someone says 1e-8 BTC, I want to know what it would take to send 0 BTC. No tiny numbers at the end. My idea (again, others probably thought of this, too) is to send 0 BTC + Mining Fee to a recipient's address with valuable content in the comments.

The comments could contain valuable plaintext like an order request, a promise to fulfill an agreement and likewise a return agreement (a contract), or it could contain arguments for some add-on protocol. I think there is value in creating public, irreversible communications, like contracts.

Would there be too many problems with this kind of transaction? Should I wait for a BitContract project?

Thanks!

I think it would waste valuable network speed...it would be like using the btc network for instant messaging.

You can already sign addresses. Then you give the signature+address to the user you want to send the message to, they verify the signature and then they can see the secret message.