This documentation is incomplete. Please use with caution.
Serenus Coin is a stable coin system. It issues a crytocurrency that retains a stable value with respect to the US dollar by holding ethereum as crypto-collateral. Issuers take on the risk of holding ethereum for a small fee. Users receive a dollar-equivalent value of serenus. It is available to anyone at any time as a store of value or medium of exchange on the ethereum mainnet.
The smart contract system that Serenus Coin is built on provides extremely good prices for swapping between ether and dollar-stable serenus. The bid/offer spreads are far better than on other decentralised exchanges and commissions are comparable to centralised exchanges. Note that this is a specialised exchange: you can only swap between ether and serenus and back again. See the white paper for more details.