Fundamentals of Smart Contract Security by Richard Ma;Jan Gorzny;Edward Zulkoski;Kacper Bak;Olga V. Mack;
Author:Richard Ma;Jan Gorzny;Edward Zulkoski;Kacper Bak;Olga V. Mack; [Неизв.]
Language: eng
Format: epub
Publisher: Momentum Press
Published: 2019-05-23T04:08:01+00:00
Gas limit
2300
2300
all/settable
Behavior on error
return false
throw exception
return false
In the case of the DAO smart contract, the ether was transferred using the call.value() method. That allowed the transfer to use the maximum possible gas limit and also prevented reverting the state upon possible exceptions. Thus, the attackers were able to create a sequence of recursive calls to siphon off funds from the DAO using a smart contract similar to the one presented in Figure 4.9.
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