# zkLink

By [yanmi](https://paragraph.com/@yanmi) · 2024-10-14

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### **Overview of zkLink (ZKL)**

zkLink is a **multi-chain infrastructure project** utilizing **zero-knowledge technology** protected by **zk-SNARKs**. It provides API-based solutions for building DeFi products such as **DEX orderbooks, NFT marketplaces, AMMs**, and other decentralized applications (dApps).

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### **Key Features of zkLink**

*   **ZK-Rollup Platform**:  
    zkLink acts as a **ZK-Rollup intermediary**, directly connecting with multiple **Layer 1 and Layer 2 blockchains**. It offers APIs, SDKs, and a specialized **zkVM** for trading, allowing developers to deploy dApps with high customizability and seamless access to aggregated liquidity.
    
*   **Multi-Chain Liquidity and Settlement**:  
    zkLink introduces two methods to enhance liquidity sharing and transaction settlement across multiple networks:
    
    1.  **zkLink Nexus**:
        
        *   Functions as a **Layer 3 network**, connecting various zkRollup ecosystems (like zkSync, StarkNet, and Polygon zkEVM) through **Ethereum**.
            
        *   Facilitates **liquidity sharing** and seamless asset transfers between connected networks.
            
    2.  **zkLink Origin**:
        
        *   Enables **transaction settlement** and **state transitions** across Ethereum, other Layer 1 blockchains, and both Optimistic and ZK rollups.
            
        *   Allows dApps to operate efficiently across multiple chains, enhancing liquidity utilization.
            

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### **Key dApps Built on zkLink**

1.  **ZKEX**
    
    *   A **DEX using an orderbook model** (instead of AMM) built on zkLink, StarkNet, and zkSync.
        
    *   Offers secure, multi-chain trading without the complexity of cross-chain bridges or wrapped tokens, ensuring simple and accessible transactions across blockchains.
        
2.  **zkJump**
    
    *   A **multi-chain bridge** that facilitates native asset transfers without relying on intermediate or wrapped tokens.
        
    *   Leverages zkLink’s infrastructure to provide **fast, secure cross-chain transactions** with connectivity to multiple Layer 1 and Layer 2 networks.
        
3.  **OpenWorld**
    
    *   A DEX supporting the trading of **multiple assets**, including cryptocurrencies and **real-world assets (RWA)**, using an **orderbook model** similar to centralized exchanges (CEX).
        
    *   It addresses liquidity fragmentation and transaction efficiency by utilizing zkLink’s technology.
        

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### **Conclusion**

zkLink offers a **seamless multi-chain trading experience** by connecting various blockchain networks and enhancing liquidity sharing. Its infrastructure and dApps—such as **ZKEX, zkJump, and OpenWorld**—simplify multi-chain interactions, eliminate the need for wrapped tokens, and improve security and efficiency for DeFi and trading applications.

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*Originally published on [yanmi](https://paragraph.com/@yanmi/zklink-1)*