Submitted by GreyArt
The addReceiver() function fails to check if the _receiver already exists. This could lead to the same receiver being added multiple times, which results in erroneous fee distributions.
The receiver would receive more than expected (until the duplicate entry has been removed).
Have a mapping address => bool isReceiver that will update whenever receivers are added, modified to a new address or removed.
0xKiwi (NFTX) acknowledged, but disagreed with medium severity and commented:
LSDan (judge) commented:
