Security researchers Pawel Wylecial and ‘E.Laszlo’ have released a report that details a bug in the Friend.tech user interface implementation that resulted in traders overpaying for ‘keys’ on the blockchain social media application.
The bug is described as resulting from the user interface caching information before the transactions are created, which falls out of sync with the blockchain in the intervening time. This is generally caused by another user trading ‘keys’ for the same account.
This error was most likely to occur when keys were being frequently traded. E.Laszlo highlighted one particular launch that saw traders spending in excess of 2.44 ether to obtain the ‘keys.’
protos.com