Espresso

About

Espresso is a cross-chain interoperability project centered around the ESP token. When a rollup or chain integrates with Espresso, its sequencer begins publishing blocks to Espresso as soon as they’re created. Espresso’s validators run a custom BFT (Byzantine Fault Tolerant) consensus protocol called HotShot to maintain a consistent view of all published blocks. Espresso validators confirm blocks and their transaction ordering in a matter of seconds.