Blockstack
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The easiest way to start building decentralized blockchain apps. Blockstack is like a framework that allows people to create and access decentralized apps on top of it. It enables that by letting users created a decentralized ID that is stored on the blockchain (bitcoin) and giving users access to the apps based on that ID (like authentication).

Stacks is the leading Bitcoin Layer 2 (L2) solution designed to bring smart contracts, decentralized finance (DeFi), and apps to the Bitcoin ecosystem. It functions by using Bitcoin as a secure base layer, allowing developers to build applications that leverage Bitcoin's security and capital.

The main features of this tool include:

  • Security-First Smart Contracts: Stacks uses Clarity, a programming language designed specifically for security and predictability. It allows smart contracts to have direct visibility into the state of the Bitcoin blockchain, and the latest version, Clarity 4, further enhances these capabilities.

  • Programmable Bitcoin (sBTC): A core feature is sBTC, a 1:1 Bitcoin-backed asset that allows users to move BTC from the Bitcoin mainnet (L1) to the Stacks L2 and back in a decentralized manner. This "unlocks" Bitcoin's capital for use in programmable applications without traditional custody risks.

  • Bitcoin-Powered Security: Transactions on Stacks are designed to be as irreversible as Bitcoin’s own transactions. By utilizing Bitcoin as its foundation, Stacks benefits from the most decentralized and battle-tested blockchain in existence.

  • Dual Stacking (Bitcoin Yield): Stacks is the first protocol where users can hold Bitcoin to earn Bitcoin. This mechanism, known as "Stacking," provides users with sustainable yields paid out in native BTC.

  • Activating Latent Capital: The platform aims to activate over $1 trillion in "latent capital" currently sitting idle in Bitcoin, providing builders and creators with a massive, untapped audience.

  • Comprehensive Ecosystem: Stacks supports a wide variety of tools and applications, including:

    • DeFi & DEXs: Platforms like Zest Protocol (lending), Velar (multi-feature DeFi), and BitFlow (decentralized exchange).

    • Wallets: Specialized Bitcoin and Stacks wallets such as Leather, Xverse, and Asigna (multisig).

    • Digital Artifacts: Tools like STX20 for creating and sharing digital assets on the Stacks blockchain.

  • Interoperability: The platform is expanding its reach through integrations such as Circle xReserve to provide USDC interoperability within the Bitcoin L2 space.