hard20 pts · first answer countssmart-contract-securityreentrancy

Modifier order and reentrancy

A function is declared as function claim() external updateReward(msg.sender) nonReentrant. updateReward calls an external rewards contract. Why is the order a problem?

A.updateReward runs before the lock, so its call can re-enterB.Modifiers always run after the function body finishesC.nonReentrant only works when it is the last modifierD.Solidity runs modifiers in a random order each call

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Modifier order and reentrancy

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