It seems like it, which is a bit of a change in direction for them. I've poked at the data from the clojure side in the past (inspecting objects), just to learn how it works, but the license was strongly worded against reverse engineering.

I've also taken a look at generated clojure bytecode. It looked like the codegen is pretty straightforward with minimal optimization. It looked like it wouldn't be too hard to reverse with maybe a little bit of backtracking (essentially a parsing problem, I believe). You'd then need a separate step to redo the macros.

It sounded like it might be a fun little project (just to see if it can be done and try my hand at decompiling), but I would have wanted to decompile datomic to make it interesting and the license precluded that.

That’s my take as well. It is definitely an odd license for a binary, I’ll grant you that.

…only if you have the source