How Does a Non-Reverting External Call Return Value Affect Contract Security?
The low-level call function returns a boolean value indicating success or failure. If the external call fails (e.g. due to an out-of-gas error or a revert in the recipient), the call function itself does not automatically revert the caller's transaction.
Failing to check this return value and proceeding with state changes can lead to inconsistent contract state, even without a reentrancy attack.
Glossar
Return
Yield ⎊ Return, within cryptocurrency and derivatives, quantifies the profit or loss realized on an investment relative to its cost, often expressed as a percentage or ratio, and is fundamental to evaluating strategy performance.
External Call
Interaction ⎊ This describes a smart contract's necessary communication with an entity outside its immediate execution environment, most commonly an oracle network to fetch real-world asset prices or event outcomes.