RVN-tokens can be exchanged for R-tokens until the supply is exhausted — currently set at 1 billion coins so there is no immediate worry that your RVN-token will lose its value. There are no hidden or additional fees for the conversion that takes place within the Revain system. The formula for exchange is as follows: one RVN-token is equal to 0.0001 R-tokens. Here is the formula (where BTC stands for Bitcoin), Simply reverse the formula to convert R-tokens back to RVN-tokens.See full review