In June 2017, a researcher published a number of vulnerabilities in Bancor, an ICO that raised over $150M in a few minutes. One of the vulnerabilities could allow an adversary to gain 117% Return On Investment (ROI) at the expense of other participants. Let's explore what happened and why, and how to protect our smart contracts against this vulnerability.
Lets discuss the concept of Front Running in various markets, including financial and domain name registration, and how it can be exploited in Ethereum transactions.
Let’s head to the lab to discover, debug, and fix this vulnerability within an actual application.
Defensive programming in Ethereum smart contracts is essential to address various vulnerabilities, old and new. Security should be built from the ground up instead of quick patches.
