Transaction spamming, or Tx spamming, is one of the persistent security attacks on these high performance blockchains that can wreak havoc for extended periods of time. The attackers might or might not gain any financial benefit, but can certainly make everybody’s life quite miserable at relatively low cost.

In this article, we define what is transaction spamming, how to detect it, and how to deal with it. Recent examples from 4 leading projects were studied, as well as a best practice is summarized.