🌟 Secondary Project Review - Space and Time (SXT) 🌟 Summary: It is the only Web3 data infrastructure project that has received strategic investment from Microsoft. It was led by Microsoft M12 Fund with a $20 million investment in 2022, and received another $20 million Series A funding from top institutions such as Framework Ventures, Arrington XRP Capital, and OKX Ventures in 2024. The total amount of the three rounds of funding reached $50 million, and the investor lineup covers global mainstream Web3 funds such as HashKey, Polygon Ventures, and Digital Currency Group. SxT has a deep cooperation with Microsoft, not only obtaining official endorsement, but also officially launching the Microsoft Azure Marketplace. Users can deploy Space and Time data warehouses on the Azure cloud with just one click, enjoying enterprise level cloud security and identity management capabilities, and achieving seamless flow of on chain and off chain data. SXT also integrates with mainstream global cloud services such as Google Cloud Marketplace and Google BigQuery to achieve multi cloud ecosystem collaboration. Technological Leadership: Space and Time is committed to building a decentralized data warehouse with zero knowledge proof (ZK) as its core technology, providing trusted and verifiable data query and analysis capabilities for smart contracts, AI, and enterprise applications. The self-developed Proof of SQL is currently the most popular data ZK proof engine in the community. Proof of SQL can achieve sub second level proof on a 600000 row data table, while ZK proof for 10 million rows of data only takes 11 seconds, with a verification time consistently maintained at the 5 millisecond level. This performance is attributed to the team's highly specialized design of ZK circuits, which not only avoids the bottleneck of general-purpose zkVM in large data scenarios, but also fully utilizes the parallel acceleration capabilities of mainstream GPUs such as NVIDIA A100 and T4. Benchmarks show that Proof of SQL can complete trusted proofs of millions of data within Ethereum block time, and has implemented ZKization of SQL standard operations such as GROUP BY, JOIN, SUM for large-scale tables. In terms of core principles, SxT adopts a self-developed commitment mechanism. Users generate exclusive commitment summaries during the data storage process to ensure that the entire data process is tamper proof. In the query process, Prover and Validator are used to generate and verify proofs, achieving end-to-end encryption and trustworthiness of the entire data input, storage, calculation, and query chain. Proof of SQL is actively open sourced, with a GitHub repository that has accumulated over 5600 stars. It supports seamless integration with mainstream SQL databases and data warehouses, such as Google BigQuery, CSV local databases, centralized/decentralized databases, etc. Developers can quickly launch the Proof of SQL module in Rust environment and choose GPU acceleration or CPU backend flexible deployment. In terms of protocol design, Proof of SQL supports flexible on chain/off chain verification methods. For public chains such as Ethereum EVM, the team is developing efficient Solidity validators to greatly reduce on chain gas consumption and achieve real-time trusted on chain access for large-scale data. The technical roadmap of the project also includes cluster level proofs, database specific commitment mechanisms, complex multi table queries and subqueries, as well as broader data type support, continuously promoting the innovative implementation of ZK proofs in decentralized data storage and smart contract fields. Widely applicable: The core product system of Space and Time is highly integrated, including sub second ZK co processors, blockchain data indexes, decentralized databases, AI driven developer Studio, APIs, and data visualization tools. The ZK coprocessor is designed for optimizing big data SQL operations, greatly enhancing the data processing capabilities of on chain smart contracts; The blockchain indexer supports structured storage and real-time indexing of data from mainstream public chains such as Ethereum, Bitcoin, Sui, zkSync, Polygon, Avalanche, etc., providing developers with efficient calling and analysis of blockchain data; The decentralized database relies on a global network of verification nodes and uses Proof of SQL as the security cornerstone to ensure the decentralization and transparency of data queries and storage. Developers can not only authenticate access through Web2/3, use Web3 wallets or traditional account encryption systems, but also automatically generate high-performance data analysis backends in AI Studio without deploying API services themselves. They can directly call the Views API of Space and Time to create new API routes and achieve instant API publishing. The project restores and integrates Web3 oracle machines such as Chainlink, directly delivering the query results of ZK proof to smart contracts, truly achieving trustworthy interaction of on chain and off chain data. The Kafka stream processing function ensures extremely high data stream throughput, meeting the real-time requirements of applications such as gaming, finance, NFT, etc. Multi chain integration: In the trend of multi chain and AI integration, Space and Time have become important infrastructure partners for major public chains and AI intelligent agent ecosystems. SXT collaborates with Sui Chain to integrate Sui RPC 2.0 GraphQL services, enabling real-time indexing and structured queries of data on Sui Chain, making it convenient for developers to build data analysis dApp、 Diversified applications such as blockchain games and dashboards. The collaboration with the zkSync ecosystem has promoted the application of AI data warehouses in Layer2/Layer3 hyperlinks. With the help of zkSync's zkEVM and hyperlink interoperability capabilities, Space and Time brings AI data model training, asset cross chain, data interoperability, and other abilities into broader scenarios. SxT has also been selected as a trusted data infrastructure by leading companies such as Chainlink, Polygon, Bitget, WEMIX, and Shrapnel, with applications covering DeFi, RWA, Web3 gaming, financial risk control, on chain compliance, and other fields. Google Cloud officially certified Proof of SQL is a trusted data processing engine that promotes new scenarios such as Web3 asset trading, data-driven DeFi, complex blockchain economy, RWA, and NFT. Developers can deploy SxT services with just one click through Google Cloud Marketplace, enabling ZK verification queries to ensure that the entire data process is tamper proof and query results can be encrypted and proven, enhancing the security and transparency of smart contracts and AI businesses. Space and Time's ZK data innovation has also received widespread attention from academia, media, and the community. The SxT team stated that sub second ZK proofs will provide underlying trust for emerging scenarios such as AI agents, DeFi, blockchain games, and RWA. In the future, every database and chain will integrate ZK proofs natively, promoting trusted collaboration between on chain businesses and AI agents.