Modify / create add-on Sumorewards plugin to include points for retweeting

While other social reward points such as points for like, share on FB or tweeting content from site on twitter are handled by Sumorewards, we wish to have an add on to this plugin such that registered loyalty programme participants in sumorewards can earn points by retweeting tweets made by our official handle (say if our handle is @websitexyz then any tweets from this handle retweeted should result into points) and can be added in the table of earnt points automatically as exists in sumorewards.