Stacks is a layer-1 blockchain that brings smart contracts and decentralized applications to Bitcoin. It enables users to build applications, smart contracts, and digital assets that combines with Bitcoin's security, capital, and network. In other words, Stacks extends the functionality of Bitcoin without modifying it. Stacks implements Proof of Transfer (PoX) mining, in which miners use Bitcoin to mine newly minted Stacks. PoX consensus mechanism involves two participants; STX miners and STX holders. Minted Bitcoins are used as Proof of Computation in the PoX consensus.
The platform is fuelled by the Stacks token (STX), which is used to execute smart contracts, processing transactions and registering new digital assets on the Stacks 2.0 blockchain. STX token holders can also stack their tokens to earn Bitcoin.