Pool panics after receiving an UpdateChannel message

[GitGab19]

Pool panics after an UpdateChannel message is received, and takes to a TargetError(NegativeInput).
It seems that something should be implemented in the code yet.
The line of interest is roles/pool/src/lib/mining_pool/mod.rs:192:17.

Here's a screenshot of the error, for a better context:

[plebhash]

@GitGab19 any tips on how to reproduce this error?

[GitGab19]

@GitGab19 any tips on how to reproduce this error?

I got it sometimes while testing with asic miner.
The translator automatically adjusts downstream difficulty in order to set the target share_per_minute set in the config file.
But at the same time, it modifies also the upstream difficulty.
If the miner stops working, the upstream difficulty can become negative.

I dig into it and I will open a PR to fix this tomorrow

[plebhash]

ok, let me know if you need help, I can try to reproduce and find a solution as well