The Unsafe External Calls Attack

There's many logic within smart contracts that could help and allow malicious attackers to find ways to trick the contract into giving you money. The re-entrancy attack or the infinite loop attack is an example of this type of vulnerability. And basically, what I've learned is that the check should happen before the transfer, not after the transfer. So the wallet should check, the DAO should check before they actually make the transfer happen.

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