How did the median bitcoin feerate evolve from 2013 to 2015? When were the feerate spikes in 2017? Visualising the bitcoin feerate distribution per block was on my todo list since I’ve started working on mempool.observer in mid 2017. But acquiring the data wasn’t as easy as I first thought.

Unconfirmed transaction are quite a hassle for bitcoin users. I recently came across an interesting problem which is not the usual “my transaction is stuck” problem.