{"id":"stacks","title":"Stacks","content":"**Stacks** is a [blockchain](https://iq.wiki/wiki/blockchain) layer built on top of [Bitcoin](https://iq.wiki/wiki/bitcoin) that enables [smart contracts](https://iq.wiki/wiki/smart-contract) and [decentralized applications](https://iq.wiki/wiki/decentralized-application) without modifying [Bitcoin](https://iq.wiki/wiki/bitcoin) itself. It leverages [Bitcoin’s](https://iq.wiki/wiki/bitcoin) security while enabling faster transactions, programmability, and novel features such as the [sBTC](https://iq.wiki/wiki/sbtc) two-way peg. The protocol was co-founded by [Muneeb Ali](https://iq.wiki/wiki/muneeb-ali) and [Ryan Shea](https://iq.wiki/wiki/ryan-shea) in 2013. [\\[1\\]](#cite-id-uwee9k118jd) \n\n## Overview\n\nStacks is a [layer-2](https://iq.wiki/wiki/layer-2) [blockchain](https://iq.wiki/wiki/blockchain) that extends [Bitcoin’s](https://iq.wiki/wiki/bitcoin) capabilities by enabling [smart contracts](https://iq.wiki/wiki/smart-contract), fast transactions, and digital assets without altering the [Bitcoin](https://iq.wiki/wiki/bitcoin) base layer. It leverages [Bitcoin’s](https://iq.wiki/wiki/bitcoin-btc) security through its block production mechanism, Proof of Transfer (PoX), in which miners spend [BTC](https://iq.wiki/wiki/bitcoin-btc) to [mine](https://iq.wiki/wiki/mining) Stacks blocks, anchoring the chain to [Bitcoin](https://iq.wiki/wiki/bitcoin) and ensuring the irreversibility of Stacks transactions. The platform uses Clarity, a purpose-built [smart contract](https://iq.wiki/wiki/smart-contract) language, which allows developers to safely create contracts that can reference [Bitcoin’s](https://iq.wiki/wiki/bitcoin) state, enabling operations such as atomic swaps and conditional asset transfers. A key component is [sBTC](https://iq.wiki/wiki/sbtc), a decentralized two-way peg that represents [Bitcoin](https://iq.wiki/wiki/bitcoin) on Stacks, allowing [BTC](https://iq.wiki/wiki/bitcoin-btc) to be used within [smart contracts](https://iq.wiki/wiki/smart-contract) and converted back to [Bitcoin](https://iq.wiki/wiki/bitcoin-btc) without relying on centralized custodians. Together, these features provide a scalable, secure, and trust-minimized environment for building [Bitcoin](https://iq.wiki/wiki/bitcoin)-integrated applications and programmable digital assets. [\\[6\\]](#cite-id-zca7i3ucxr) \n\n[YOUTUBE@VID](https://youtube.com/watch?v=S3-fpTUawbk)\n\n## Architecture\n\n### Proof of Transfer (PoX)\n\nProof of Transfer (PoX) is the block production mechanism used by Stacks, designed to anchor a new [blockchain](https://iq.wiki/wiki/blockchain) to the security of an existing [proof-of-work](https://iq.wiki/wiki/proof-of-work-pow) chain—in this case, [Bitcoin](https://iq.wiki/wiki/bitcoin)—without modifying [Bitcoin](https://iq.wiki/wiki/bitcoin) itself. PoX is an evolution of proof-of-burn: instead of destroying [cryptocurrency](https://iq.wiki/wiki/cryptocurrency), miners transfer [BTC](https://iq.wiki/wiki/bitcoin-btc) to network participants (Stackers) as part of the [mining](https://iq.wiki/wiki/mining) process, securing the Stacks network while earning [BTC](https://iq.wiki/wiki/bitcoin-btc) rewards. By recording a hash of each Stacks block in [Bitcoin](https://iq.wiki/wiki/bitcoin) transactions, the history of Stacks is cryptographically anchored to [Bitcoin](https://iq.wiki/wiki/bitcoin), inheriting its security and finality. This integration allows [Stacks](https://iq.wiki/wiki/stacks) blocks to reference [Bitcoin](https://iq.wiki/wiki/bitcoin) state directly, enabling Clarity [smart contracts](https://iq.wiki/wiki/smart-contract) to react to or verify [Bitcoin](https://iq.wiki/wiki/bitcoin) transactions. The mechanism also ensures that miners must build on the latest Stacks blocks, preventing independent forks and leveraging [Bitcoin’s](https://iq.wiki/wiki/bitcoin) hashrate to secure consensus. Through PoX, Stacks can unlock [Bitcoin’s](https://iq.wiki/wiki/bitcoin) capital for [decentralized applications](https://iq.wiki/wiki/decentralized-application), enabling a programmable economy while using [Bitcoin](https://iq.wiki/wiki/bitcoin) as a base layer for value and settlement. [\\[13\\]](#cite-id-7vSRBbFPd3uvRZsV) \n\n#### Stacking\n\nStacking is a mechanism on the Stacks [blockchain](https://iq.wiki/wiki/blockchain) that allows STX token holders to lock their tokens and participate in network consensus as signers, earning [Bitcoin](https://iq.wiki/wiki/bitcoin) as rewards. Unlike traditional [staking](https://iq.wiki/wiki/staking) in [PoS](https://iq.wiki/wiki/proof-of-stake) networks, stacking generates yield in [BTC](https://iq.wiki/wiki/bitcoin-btc) rather than the locked token, requires no slashing, and uses the PoX (Proof of Transfer) [consensus mechanism](https://iq.wiki/wiki/consensus-mechanism). STX tokens remain in the holder’s wallet while locked, becoming temporarily unspendable until the end of the lockup period. Stacking operates in roughly two-week reward cycles with a preparation phase for selecting stackers and a reward phase for distributing [BTC](https://iq.wiki/wiki/bitcoin-btc) payouts.\n\nParticipants can stack solo—run their own signer and meet the minimum STX requirements—or delegate stacking to a pool operator, who handles the signer responsibilities. All stackers must register block-signing keys to ensure signatures can be validated and stacking integrates with the PoX protocol. [\\[14\\]](#cite-id-nCa1zGvSXXkzrxxv) \n\n#### Dual Stacking\n\nDual Stacking is a mechanism on the Stacks network that allows [Bitcoin](https://iq.wiki/wiki/bitcoin) holders to earn [Bitcoin](https://iq.wiki/wiki/bitcoin)-denominated rewards in [sBTC](https://iq.wiki/wiki/sbtc) by pairing their [BTC](https://iq.wiki/wiki/bitcoin-btc) with STX tokens and optionally deploying [sBTC](https://iq.wiki/wiki/sbtc) into [DeFi](https://iq.wiki/wiki/defi). Unlike other [blockchains](https://iq.wiki/wiki/blockchain) that pay rewards in their native token, Stacks uses Proof of Transfer (PoX) to enable real [Bitcoin](https://iq.wiki/wiki/bitcoin) rewards. Participants receive a baseline [BTC](https://iq.wiki/wiki/bitcoin-btc) reward for the [sBTC](https://iq.wiki/wiki/sbtc) enrolled in Dual Stacking. They can earn additional rewards based on their STX-to-[sBTC](https://iq.wiki/wiki/sbtc) ratio, which follows a square-root curve to provide diminishing returns, and through deploying [sBTC](https://iq.wiki/wiki/sbtc) in [DeFi](https://iq.wiki/wiki/defi), which offers a 10× reward multiplier. The reward system is designed to prevent manipulation by setting the maximum STX/[BTC](https://iq.wiki/wiki/bitcoin-btc) ratio at the 95th percentile of user ratios, ensuring broad participation and fairness while continuing to provide standard STX stacking rewards. [\\[15\\]](#cite-id-HzQqD5HbLqxSxalj)  [\\[16\\]](#cite-id-1Aq8vrWJOSSUT4yS) \n\n### Clarity\n\nClarity is a decidable, interpreted [smart contract](https://iq.wiki/wiki/smart-contract) language designed for the Stacks [blockchain](https://iq.wiki/wiki/blockchain), prioritizing predictability, security, and transparency. Unlike compiled languages, Clarity code is executed exactly as written, making it human-readable and verifiable, and its decidable nature ensures all programs halt in a finite number of steps. The language prevents common vulnerabilities such as reentrancy, overflows, and underflows, and enforces explicit handling of return values to avoid silent failures. Clarity supports built-in creation and management of fungible and [non-fungible tokens](https://iq.wiki/wiki/non-fungible-token-nft), with post conditions to enforce transactional outcomes. It favors composition over trait inheritance, simplifying contract structure and interoperability. Additionally, Clarity contracts can access [Bitcoin’s](https://iq.wiki/wiki/bitcoin) base chain, enabling smart contracts to react to [Bitcoin](https://iq.wiki/wiki/bitcoin) transactions and verify cryptographic signatures, integrating [Bitcoin](https://iq.wiki/wiki/bitcoin) as a foundational layer for secure, programmable applications. [\\[7\\]](#cite-id-nzjaed2ugdi) [\\[17\\]](#cite-id-C7bvhQF0jf7VkoS8) \n\n### sBTC\n\n​[sBTC](https://iq.wiki/wiki/sbtc) is a SIP-010 fungible token on the Stacks [blockchain](https://iq.wiki/wiki/blockchain) that represents [Bitcoin](https://iq.wiki/wiki/bitcoin) at a fixed 1:1 ratio and can be converted back to [BTC](https://iq.wiki/wiki/bitcoin-btc) on the [Bitcoin](https://iq.wiki/wiki/bitcoin) [blockchain](https://iq.wiki/wiki/blockchain). It functions as a two-way peg that allows [Bitcoin](https://iq.wiki/wiki/bitcoin) to be used within [Stacks](https://iq.wiki/wiki/stacks) [smart contracts](https://iq.wiki/wiki/smart-contract) while remaining backed by [BTC](https://iq.wiki/wiki/bitcoin-btc) held in a single [Bitcoin](https://iq.wiki/wiki/bitcoin) [UTXO](https://iq.wiki/wiki/unspent-transaction-output-utxo) secured by a multi-signature Taproot address. This [UTXO](https://iq.wiki/wiki/unspent-transaction-output-utxo) is managed by a decentralized set of [sBTC](https://iq.wiki/wiki/sbtc) signers, who are responsible for signing peg operations, maintaining custody of the locked [BTC](https://iq.wiki/wiki/bitcoin-btc), and interacting with [sBTC](https://iq.wiki/wiki/sbtc) [smart contracts](https://iq.wiki/wiki/smart-contract), with signer membership and key rotation governed collectively. Deposits and withdrawals between [BTC](https://iq.wiki/wiki/bitcoin-btc) and [sBTC](https://iq.wiki/wiki/sbtc) occur within a defined number of [Bitcoin](https://iq.wiki/wiki/bitcoin) blocks. An external service, the Emily API, coordinates communication between users, signers, and contracts to facilitate bridge operations. Through this structure, [sBTC](https://iq.wiki/wiki/sbtc) enables [Bitcoin](https://iq.wiki/wiki/bitcoin) to interact with [smart contract](https://iq.wiki/wiki/smart-contract) applications on Stacks without requiring [BTC](https://iq.wiki/wiki/bitcoin-btc) to be sold or custodied by a centralized intermediary. [\\[18\\]](#cite-id-wq1aoRcYZ68CPgX9) \n\n## STX\n\nSTX is the native token of the Stacks network, serving as an infrastructure token that facilitates [transaction fees](https://iq.wiki/wiki/transaction-fee), network security, and governance. It is used to pay for [transaction fees](https://iq.wiki/wiki/transaction-fee) on the network, reward miners for verifying transactions, participate in governance through voting, and support the Proof of Transfer (PoX) [consensus](https://iq.wiki/wiki/consensus-mechanism) by locking (or “stacking”) STX to earn [Bitcoin](https://iq.wiki/wiki/bitcoin) rewards. Within the Stacks ecosystem, STX can also be utilized in [decentralized applications](https://iq.wiki/wiki/decentralized-application), including [DeFi](https://iq.wiki/wiki/defi) platforms, [NFT](https://iq.wiki/wiki/non-fungible-token-nft) marketplaces, and name registrars, providing both utility and incentives for network participation. [\\[19\\]](#cite-id-JpcWlbTpkYU5DPOr)  [\\[20\\]](#cite-id-OA0d6ArLJsyxcW05) ","summary":"Stacks is a decentralized protocol enabling smart contracts and decentralized apps to leverage Bitcoin for transactions and asset management, co-founded by Mune...","images":[{"id":"QmeVKJ1AC9FRKVtiowBvzQQTGgmLRC556H4i4ADqvdnnE4","type":"image/jpeg, image/png"}],"categories":[{"id":"cryptocurrencies","title":"Cryptocurrencies"}],"tags":[{"id":"Protocols"},{"id":"Blockchains"}],"media":[{"id":"QmPZc9h48dVuWiS1n8mzv3SD3hBEGnZte96UjjQeBrriK1","size":"0.01","name":"1*zdfEpJ2XxbB_DUbShcDwZg.webp","type":"GALLERY","source":"IPFS_IMG"},{"id":"https://www.youtube.com/watch?v=S3-fpTUawbk","size":"0","name":"S3-fpTUawbk","type":null,"source":"YOUTUBE"},{"id":"https://www.youtube.com/watch?v=KmN3LiQxUXg","size":"0","name":"KmN3LiQxUXg","type":null,"source":"YOUTUBE"},{"id":"https://www.youtube.com/watch?v=ecNFP2DCQhU","size":"0","name":"ecNFP2DCQhU","type":null,"source":"YOUTUBE"}],"metadata":[{"id":"references","value":"[{\"id\":\"uwee9k118jd\",\"description\":\"Stacks\",\"timestamp\":1765981232827,\"url\":\"https://www.stacks.co/\"},{\"id\":\"09kxg8utj4el\",\"url\":\"https://kriptomat.io/cryptocurrencies/stacks/what-is-stacks/\",\"description\":\"Kriptomat\",\"timestamp\":1682924949392},{\"id\":\"6atr7gqa0z9\",\"url\":\"https://jornvanzwanenburg.medium.com/an-introduction-to-stacks-1e2a1c8f974\",\"description\":\"Medium\",\"timestamp\":1682924959542},{\"id\":\"u9pieqizu4\",\"url\":\"https://gaia.blockstack.org/hub/1AxyPunHHAHiEffXWESKfbvmBpGQv138Fp/stacks.pdf\",\"description\":\"Blockstack\",\"timestamp\":1682925036742},{\"id\":\"7j1qn6o72s6\",\"url\":\"https://kriptomat.io/cryptocurrencies/stacks/what-is-stacks/\",\"description\":\"Kriptomat\",\"timestamp\":1682925078808},{\"id\":\"zca7i3ucxr\",\"url\":\"https://docs.stacks.co/docs/stacks-academy/microblocks\",\"description\":\"Docs\",\"timestamp\":1682925089175},{\"id\":\"nzjaed2ugdi\",\"url\":\"https://clarity-lang.org\",\"description\":\"Clarity\",\"timestamp\":1682925095925},{\"id\":\"epwku8v0fc8\",\"url\":\"https://www.stacks.co/explore/get-stx\",\"description\":\"Stacks - STX\",\"timestamp\":1682925108908},{\"id\":\"4axp5axyrc9\",\"url\":\"https://www.coinbase.com/price/stacks\",\"description\":\"Coinbase\",\"timestamp\":1682925118042},{\"id\":\"2b1sxku34qf\",\"url\":\"https://flagship.fyi/outposts/bitcoin-economy/everything-you-need-to-know-about-stacks-nakamoto-upgrade/\",\"description\":\"More details on the Nakamoto upgrade.\",\"timestamp\":1705561227222},{\"id\":\"d1qhw8qtghe\",\"url\":\"https://flagship.fyi/outposts/bitcoin-economy/stacks-21-upgrade-what-you-need-to-know/#brbsbtc-amp-the-nakamoto-releaseb\",\"description\":\"Details on the 2.1 upgrade for Stacks\",\"timestamp\":1705562218531},{\"id\":\"jzz17iavmy\",\"url\":\"https://flagship.fyi/outposts/bitcoin-economy/sbtc-crypto-bitcoin-layer-2-smart-contracts/\",\"description\":\"Details on the upcoming sBTC features\",\"timestamp\":1705562289802},{\"id\":\"7vSRBbFPd3uvRZsV\",\"description\":\"Proof of Transfer | Stacks Docs\",\"timestamp\":1765981150600,\"url\":\"https://docs.stacks.co/learn/stacks-101/proof-of-transfer\"},{\"id\":\"nCa1zGvSXXkzrxxv\",\"description\":\"Stacking | Stacks Docs\",\"timestamp\":1765981170246,\"url\":\"https://docs.stacks.co/learn/block-production/stacking\"},{\"id\":\"HzQqD5HbLqxSxalj\",\"description\":\"Dual Stacking | Stacks Docs\",\"timestamp\":1765981313750,\"url\":\"https://docs.stacks.co/learn/dual-stacking\"},{\"id\":\"1Aq8vrWJOSSUT4yS\",\"description\":\"Dual Stacking litepaper | Github\",\"timestamp\":1765981328183,\"url\":\"https://github.com/stx-labs/papers/blob/main/Dual%20Stacking%20Litepaper.pdf\"},{\"id\":\"C7bvhQF0jf7VkoS8\",\"description\":\"Clarity | Stacks Docs\",\"timestamp\":1765981351180,\"url\":\"https://docs.stacks.co/learn/clarity\"},{\"id\":\"wq1aoRcYZ68CPgX9\",\"description\":\"sBTC | Stacks Docs\",\"timestamp\":1765981448487,\"url\":\"https://docs.stacks.co/learn/sbtc\"},{\"id\":\"JpcWlbTpkYU5DPOr\",\"description\":\"STX | Stacks\",\"timestamp\":1765981473390,\"url\":\"https://www.stacks.co/explore/get-stx\"},{\"id\":\"OA0d6ArLJsyxcW05\",\"description\":\"What is Stacks (STX)? 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