Hello there,
Nostalrius released few days ago a feature which shall prevent scams made via trade window by implementing a two second delay before accepting trade when an item or money in the window was changed.
SOURCE: https://twitter.com/NostalBegins/status ... 2161168384
This small AddOn with 22 lines of code will simply 'grey out' the Trade button in your Trade window when this delay is active and you can't accept the trade yet.
So you can think of it as a small visual adjustment for the client to adapt the servers feature.
Download / Code
Download: https://github.com/MOUZU/NostalriusAcceptTrade/releases
GitHub Repository: https://github.com/MOUZU/NostalriusAcceptTrade
How to install
When you download the code directly from GitHub you have to unzip the file and rename the folder from 'NostalriusAcceptTrade-master' to 'NostalriusAcceptTrade' and place the folder in your /World of Warcraft/Interface/AddOns/ directory and it should popup in your AddOns list in the character selection screen.