Do Reentrancy Guards Protect against Both Single-Function and Cross-Function Attacks?
Yes, a properly implemented reentrancy guard can protect against both types of attacks. The guard typically uses a lock that is applied at the contract level, not just for a single function.
When any function with the guard modifier is entered, the lock is activated. If an external call from this function leads to a re-entrant call to any other function that also has the guard, the second function will see the lock is active and will revert the transaction.
This prevents both recursive calls to the same function and calls to other state-sharing functions within the contract.
Glossar
Reentrancy Guard Modifier
Mechanism ⎊ A Reentrancy Guard Modifier functions as a critical control within smart contract architecture, specifically designed to prevent malicious recursive calls during function execution.
Reentrancy Guard
Mitigation ⎊ A Reentrancy Guard functions as a critical control mechanism within smart contracts, specifically designed to prevent recursive calls to the same function before the initial execution completes.
Reentrancy Guards
Mechanism ⎊ Reentrancy Guards are specialized code mechanisms, typically implemented as function modifiers, that enforce a mutual exclusion lock on a smart contract function during its execution.