  For decentralised P2P networks, it is very important to have a mechanism in
place that allows the nodes to control resource usage and prevent flooding and
denial-of-service attacks with spam. In this paper, we discuss and compare the
different approaches to fully decentralised resource control that are used by
projects in the cryptocurrency space. The introduced methods are then applied
to design a decentralised exchange for Namecoin names (or more generally,
crypto assets) as an example.
