Delegate Call Code vulnerabilities

How Delegate Calls works?

When a DELEGATECALL is made, the context is retained to the called contract, which retains the msg.sender, msg.value and affects the storage of the caller contract.

Here's a table showing the context of the DELEGATECALL, initiated by an EOA calling contract A that DELEGATECALLs contract B.

	Contract A	Contract B
msg.sender	EOA address	EOA address
msg.value	EOA send value	EOA send value
storage	Contract A	Contract A

Vulnerabilities

Storage Collision

Multi Delegateecall Pattern Vulnerabilities