Ethereum smart contracts are interesting for security - Reverse engineering contracts, exploiting vulnerabilities and more

We learn how smart contracts written in solidity are deployed, and how it can be used to backdoor a contract.
I thought I know Ethereum smart contract security, but this challenge punched me in the face. This video goes over a basic first code review to understand the contract setup.
In this video we identify a backdoor and find the gadgets to do Jump-oriented Programming in a ethereum smart contract

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