A historical overview of consensus and DoS incidents on major blockchains

In 2020, Ethereum, due to The Summer of DeFi, experienced unusual user activity, which revealed itself in the incredible growth of on-chain volumes. For the popularity of the blockchain and the industry in general, this growth is undoubtedly a good sign. In particular, the increased demand for transactions led to high gas prices and the subsequent development of ecosystems on other smart contract platforms.

During the fall of last year, DeFi users of various protocols encountered rug pulls and exploits, losing at least $66M. From that moment on, the ability of developers to find dangerous bugs in the code has significantly grown due to initiatives like Immunefi and Code 423n4 programs. However, not many users are also concerned about the possible consequences of bugs in the code of blockchain nodes.