RDD coin is a kind of social currency that can enrich people's social life and make digital currency easy to use by the general public. The full English name is ReddCoin. Snsnail seamlessly integrates its digital currency platform with all major social networks and focuses on being the currency of social networks, thereby making the process of sending and receiving money fun and beneficial to everyone. In the early stage, the traditional POW distribution method was adopted, and the POSV algorithm based on the proof of rights and interests and activity frequency was created in the later stage, so the cost of cloning the snail coin is very large.