Stacks.

Stacks operates as a Bitcoin Layer 2, bringing smart contract functionality to the world's most secure blockchain without altering Bitcoin itself. It achieves this through a unique consensus mechanism called Proof-of-Transfer (PoX), which is deeply intertwined with Bitcoin's Proof-of-Work. Stacks miners spend Bitcoin to participate in mining new Stacks blocks, and in return, Stacks holders can "Stack" their STX tokens to earn BTC rewards directly from miners. Smart contracts on Stacks are written in Clarity, a decidable programming language designed for predictability and security, making it easier to audit and prevent common smart contract exploits. The upcoming sBTC mechanism aims to introduce a fully decentralized, pegged Bitcoin asset on Stacks, enabling seamless transfer of value between the two layers. The primary utility of Stacks is to unlock Bitcoin's dormant capital and security for a new era of decentralized finance (DeFi), non-fungible tokens (NFTs), and other complex decentralized applications. By allowing smart contracts to read Bitcoin's state and facilitating the movement of Bitcoin value onto its layer, Stacks enables use cases such as lending and borrowing platforms, decentralized exchanges, stablecoins, and digital identity solutions, all secured by Bitcoin. STX tokens are used for transaction fees, smart contract execution, and for participating in the network's consensus mechanism through Stacking, allowing holders to earn Bitcoin rewards. Stacks holds a unique and significant position in the cryptocurrency market as the leading project dedicated to extending Bitcoin's capabilities beyond simple value transfer. It addresses a critical demand for programmable Bitcoin, positioning itself as a core infrastructure provider for the emerging "Bitcoin economy." Its success is closely tied to the broader adoption of Bitcoin as a foundational layer for decentralized innovation and the growth of the Bitcoin Layer 2 ecosystem. The ongoing development of sBTC and the increasing developer interest in building on Bitcoin further underscore Stacks' potential to become a pivotal player in expanding Bitcoin's utility and market relevance.