wSIENNA (wrapped SIENNA) is an ERC-20 version of the native SIENNA token running on Secret Network (SNIP-20).
wSIENNA is live on Uniswap, and can be bridged to native SIENNA via the bridge at https://bridge.scrt.network/
It’s a zero sum game. The total and circulating supply will always be the same regardless of how many wSIENNA or SIENNA that are traded. If, for example 100,000 wSIENNA is circulating, then 100,000 SIENNA will be locked; hence, it is a zero sum balance.
You lock up SIENNA on the bridge and it mints wSIENNA. If you want your SIENNA back - you send it to the bridge, which then burns the wSIENNA and releases your SIENNA back to you. It's that simple.
Note that while SIENNA is a privacy token, wSIENNA is not. To vote at the Sienna Network protocol, you will need to swap your wSIENNA into SIENNA.