The Stacks protocol has achieved a major milestone by executing the first trustless native asset swap directly on the Bitcoin blockchain. This so-called “Catamaran Swap” enabled a direct exchange between Bitcoin (BTC) and Stacks (STX) without any intermediary or trust in a third party. The event was widely celebrated by the Stacks community, with co-founder Muneeb Ali calling it a “big deal” on Twitter. Ali emphasized that users can now perform trustless BTC swaps to stablecoins, derivatives, perpetuals, and even NFTs — all through pure Bitcoin transactions on the main chain. “Bitcoin has established itself as digital gold, but you can’t use BTC to trade without going through centralized exchanges or alt blockchains with wrapped bitcoin. Not anymore,” Ali stated.
How the Trustless Swap Works
According to a Reddit post on the r/stacks forum, the swap was executed on July 23 and involved a non-fungible token (NFT) named “Boombox (b-12).” The conditions of the swap were defined on the Stacks chain, and the subsequent Bitcoin transfer and verification were recorded on the Bitcoin mainnet. The mechanism allows any user to trigger trustless asset transfers simply by sending Bitcoin from one address to another — a feature that gives Bitcoin a “new dimension,” as the Reddit user noted. “Transfers can be inspected and validated by smart contracts on the Stacks blockchain,” they wrote. Stacks is a Layer-1 blockchain that uses Bitcoin as its base layer and relies on a proof-of-transfer consensus mechanism to validate transactions between the two networks. Its smart contract language, Clarity, is similar to Ethereum’s Solidity, enabling complex DeFi logic.
Muneeb Ali expanded on the implications in a tweetstorm: “Wrapped bitcoin is not bitcoin. Many bitcoiners don’t trust the network models that house these assets. Centralized exchanges have counterparty risk and require KYC. All that changes now.” He also revealed that USD Coin (USDC) support is coming soon, which will enable trustless BTC/USDC swaps. “Ethereum features are possible directly on Bitcoin,” Ali said. “Uniswap-like AMMs built around native BTC swaps can now exist, all with the robust security of the Bitcoin blockchain.”
Introducing ALEX: A Bitcoin-Native Automated Market Maker
Just one day after the trustless swap milestone, the Stacks ecosystem unveiled ALEX, an automated market maker (AMM) protocol built entirely on Stacks and Bitcoin. According to a blog post published on July 27, ALEX allows users to lend, earn, and borrow Bitcoin with minimized risk and maximized returns. Its key differentiators include fixed-rate lending and borrowing, superior loan-to-value (LTV) ratios, higher security, and lower fees. The ALEX Twitter account highlighted that the protocol “helps crypto users preserve their capital and maximize the value of their assets.” Muneeb Ali welcomed the launch, tweeting: “Yesterday, we saw trustless Bitcoin swaps; today, a new AMM ALEX came out built on Stacks + Bitcoin. The Bitcoin revolution is unstoppable.” ALEX is designed to function similarly to Uniswap but operates entirely with native Bitcoin transactions, eliminating the need for wrapped assets.
Competition in the Bitcoin DeFi Landscape
While Stacks has achieved a technical breakthrough, it faces stiff competition from existing projects such as Thorchain, Badger DAO, and RSK. Thorchain, for example, has enabled trustless cross-chain swaps for some time and powers the Shapeshift platform. However, Thorchain has suffered from security breaches in the past. Meanwhile, Ethereum and Binance Smart Chain (BSC) already dominate the DeFi space with dozens of wrapped Bitcoin tokens — including WBTC, HBTC, RENBTC, and TBTC — collectively holding over 250,729 BTC on Ethereum alone. These networks offer mature AMMs, lending pools, and decentralized exchanges. Stacks will need to leverage its unique Bitcoin-native architecture to attract users who prioritize security and decentralization over the convenience of existing solutions.
Despite the challenges, Muneeb Ali remains optimistic about Stacks’ future. “Bitcoin is sovereign money. An entire open financial world will be created around Bitcoin. Native BTC swaps to new assets are a foundational building block of Bitcoin DeFi. Bitcoin eating the banks,” he declared. With the launch of ALEX and other upcoming applications, the vision of a fully functional Bitcoin-based DeFi ecosystem is gradually becoming a reality.