The selfish mining network as described in the following blog post is broken. Gamma=0 results in a devide-by-zero and hence unbounded message delays from attacker to defender. These message delays weaken the attacker.
It would be better to sample the message delays from a different interval. Maybe fix the interval length, then move it up or down to meet the given gamma. I recall that we had something like this before. Could be worth browsing the history of the network implementation.
The selfish mining network as described in the following blog post is broken. Gamma=0 results in a devide-by-zero and hence unbounded message delays from attacker to defender. These message delays weaken the attacker.
https://pkel.github.io/cpr/blog/generalizing-selfish-minings-gamma/#constructing-a-network
As a hotfix, I've decreased the epsilon to 1e-9. This enables gamma=0.01 without risking significant message delays.
https://github.com/pkel/cpr/commit/e7521ad4c6d01a293732ee89e334da4b78a5912f#diff-d63bdccebde9f15fb0baea8999c8565dfe15c0cb0dbcf37ef3a896770550c290
It would be better to sample the message delays from a different interval. Maybe fix the interval length, then move it up or down to meet the given gamma. I recall that we had something like this before. Could be worth browsing the history of the network implementation.