Stored procedures, db functions

[d-r-q]

It's possible to keep the code implementing transactions right in qbit storage, and it may enable much more powerful conflicts avoidance and resolution solutions.

Investigate such possibility.

Probably, Kotlin scripting may be used for implementation (when will be available on all platforms): https://github.com/Kotlin/KEEP/blob/master/proposals/scripting-support.md#simple-host-eval-function