[coinculture]

Thanks!

1) We're looking to get the Cosmos Hub up before the year is out, and to roll out production support in 2018.

2) Great, if you like. But if you want to support light clients you will need a scheme for producing Merkle proofs. Streaming data out of the app into Postgres to better serve clients, sure. But Postgres within the hot paths of your app? Not sure.

3) Sure. Or you can use BeginBlock or EndBlock messages to have the blockchain automatically run code even without transactions :)

4) We're still working on this. For now you can use an external random number oracle, or the block hash, which is available in the Header passed into BeginBlock. The block hash is currently highly manipulable.

[sunnya97]

Some other random generation techniques include commit-reveal schemes, BLS Threshhold Relays, VRFs, Private Hashchains, etc.