Osmosis is a decentralized exchange (DEX) appchain within the Cosmos ecosystem, functioning as both a Layer-1 blockchain and an application. Built by forking the Cosmos SDK, it is secured by Tendermint's Byzantine Fault-Tolerant (BFT) Proof-of-Stake (PoS) consensus mechanism. Validators must stake the OSMO token, the network's native token. sactions and proposing blocks.