ChainCatcher message, SIP-033 and SIP-034 proposals have been officially activated at Bitcoin Block Height 923222, and the Bitcoin smart contracts layer Stacks has synchronously launched the Clarity 4 smart contract language.
This upgrade adds six core functions for developers: obtaining and verifying on-chain contract code hash, setting custom post-conditions for contracts, converting simple values to ASCII strings, obtaining the current block timestamp, secp256r1 signature verification (supporting native key integration), and a dimensional resource term extension mechanism. These features will lower the development threshold for native DeFi applications on Bitcoin, helping to build safer and more flexible financial protocols, further strengthening Stacks' positioning as the liquidity layer of the Bitcoin ecosystem. All transactions on Stacks are settled on the Bitcoin chain, relying on the proof of transfer mechanism to obtain security guarantees from the Bitcoin network.
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