[don't merge] Hacky way to simulate attempts of get_outs

[j-berman]

Overview

The goal of this is to sanity check the gamma distribution the client's decoy selection algorithm produces by re-attempting get_outs a bunch of times. It's super hacky.

How to run

First, make sure you're running a node, and pause it (I called the command max_peers 0 so it would stop syncing with other nodes). Pausing it makes sure each run of get_outs will be consistent.

Second, make sure you have a mainnet wallet with a recent output, then run monero-wallet-cli and just attempt to make a transfer. It will run the simulation, and then automatically fail out of the transaction construction process and tell you to check the logs. Once complete, the logs will contain lines like the following:

2021-07-16 00:38:31.504	    7f963fe26a00	INFO	wallet.wallet2	src/wallet/wallet2.cpp:8167	Diff from current height: 1013, Frequency: 14
2021-07-16 00:38:31.504	    7f963fe26a00	INFO	wallet.wallet2	src/wallet/wallet2.cpp:8167	Diff from current height: 1014, Frequency: 210
2021-07-16 00:38:31.504	    7f963fe26a00	INFO	wallet.wallet2	src/wallet/wallet2.cpp:8167	Diff from current height: 1015, Frequency: 211

What to do with the logs

There's probably a way easier way to do this and automate it, but I just copy pasted the logs into LibreOffice calc, used the built-in delimiter, parsed the height diff and frequency into 2 separate columns, then made a chart: