What Are ZKThreads?

ZKThreads is a framework that can improve the performance and scalability of decentralized applications (DApps) by using zero-knowledge proofs (ZKPs). It offers benefits like improved user experience, lower transaction costs, and enhanced security. ZKThreads can be utilized in decentralized exchanges (DEXes), session-based games, zk-secured middleware, and on-chain AI systems.

Basics

Achieving optimal security, composability, and interoperability in decentralized applications is challenging. ZKThreads present a promising solution to this complex issue. This article delves into what ZKThreads are, their operational mechanism, their distinctions from other zk solutions, and their benefits and applications.

What Are ZKThreads?

ZKThreads, a zero-knowledge framework, boost the performance and scalability of DApps. Leveraging Starknet's features, they establish a standardized environment for developing and operating interoperable blockchain applications.

The Functionality of ZKThreads

• Deploying Application Logic: Application logic is first deployed into ZKThreads' app contracts, which dictate the operational rules of the application.
• Batching Transactions: Instead of processing each transaction individually, ZKThreads consolidate multiple transactions into one batch for more efficient processing.
• Creating Proofs: A cryptographic proof, known as a STARK proof, is generated to validate all transactions in the batch according to the contract rules.
• Verification: The STARK proof is then sent to the Layer 2 sequencer for verification against the DApp's canonical record. The ZKThread Verifier, a contract on Starknet, ensures the proof's accuracy by checking for double-spending, authorization, and consistency with blockchain rules. Valid proofs update the DApp's canonical state, while invalid proofs are rejected, preserving the application's integrity.

ZKThreads vs. Other ZK Solutions

Data Handling

ZKThreads store both state and transaction data off-chain while using zero-knowledge proofs (ZKPs) to validate transactions. This approach contrasts with traditional zero-knowledge rollups (zk-rollups), which offload computation but keep transaction data on-chain. By keeping all data off-chain, ZKThreads enhance scalability and reduce costs, unlike zk-rollups such as zkSync that periodically post batched transaction data on-chain for data availability.

Interoperability

ZKThreads emphasize creating interoperable applications, promoting seamless interaction within the ecosystem and reducing fragmentation. In contrast, solutions like zkEVM focus primarily on compatibility.

Validation Mechanism

ZKThreads use STARK proofs to validate batched transactions and state changes, which are then checked against the DApp's canonical state. Other zk-rollups, like zkSync, use zk-SNARKs or zk-STARKs for on-chain verification of cryptographic proofs.

Advantages of ZKThreads

• Enhanced User Experience: ZKThreads facilitate seamless interaction across various DApps, enabling users to access multiple applications without the need to switch networks.
• Cost Efficiency: By batching transactions for simultaneous processing, ZKThreads minimize the number of entries on the main blockchain. This reduces transaction fees, making DApps more affordable. Additionally, storing state and transaction data off-chain while maintaining security with zero-knowledge proofs (ZKPs) lowers the blockchain's data load and gas fees.
• Improved Security: Utilizing ZKPs, ZKThreads enhance security by validating transactions without exposing underlying data, thus preserving privacy. They also ensure that transactions adhere to predefined rules, preventing unauthorized activities.

Applications of ZKThreads

Layer 2 Decentralized Exchanges

ZKThreads enhance the efficiency of DEXes on Starknet by significantly reducing transaction fees. Instead of incurring fees for each trade, users only pay fees upon withdrawing funds, making DEXes more cost-effective and practical.

Session-Based Games

For games like poker and chess, ZKThreads aggregate fees by charging a single fee at the game's end when final results are recorded on Starknet. This enables developers to create fully on-chain games without high transaction costs.

ZK-Secured Middleware and Shared Liquidity Infrastructure

ZKThreads provide a secure framework for middleware applications such as oracles and bridges. Integrating functionality within a ZKThread allows these applications to leverage zero-knowledge proofs for enhanced security and interoperability.

On-Chain AI

ZKThreads offer the computational power needed to run AI models directly on the blockchain, maintaining data and operations consistency. These AI models can be utilized by various applications, including games, social media platforms, and productivity tools.

Conclusion

ZKThreads provide a scalable and secure framework for developing DApps with zero-knowledge proofs. They particularly benefit Starknet DEXes, session-based games, and middleware applications. Unlike other zk solutions, ZKThreads focus on interoperability, store all data off-chain, and use a unique verification process. In the future, ZKThreads could greatly improve the performance and usability of DApps.