FIS is an Ethereum token that powers StaFi, a cross-chain protocol for trading staked assets as derivatives (also called “liquid staking”). Users can stake proof of stake assets via StaFi to receive “rTokens” (for example, staking 1 XTZ on StaFi might generate 1 rXTZ), which can be freely traded and redeemed for a corresponding amount of the locked and staked asset. FIS is used for staking and minting rTokens, and for paying transaction fees on the network.

The world’s first cryptocurrency, Bitcoin is stored and exchanged securely on the internet through a digital ledger known as a blockchain. Bitcoins are divisible into smaller units known as satoshis — each satoshi is worth 0.00000001 bitcoin.