Elysium: Context-Aware Bytecode-Level Patching to Automatically Heal Vulnerable Smart Contracts. (arXiv:2108.10071v3 [cs.CR] UPDATED)

Fixing bugs is easiest by patching source code. However, source code is not
always available: only 0.3% of the ~49M smart contracts that are currently
deployed on Ethereum have their source code publicly available. Moreover, since
contracts may call functions from other contracts, security flaws in
closed-source contracts may affect open-source contracts as well. However,
current state-of-the-art approaches that operate on closed-source contracts
(i.e., EVM bytecode), such as EVMPatch and SmartShield, make use of purely
hard-coded templates that leverage fix …

bytecode patching smart smart contracts vulnerable