SPID-Chain: A Smart Contract-Enabled, Polar-Coded Interoperable DAG Chain

2025-01-21

AI Summary

To address the inherent trade-off among efficiency, security, and decentralization in cross-chain interoperability, this paper proposes a Web3-native DAG-based cross-chain consensus system. Methodologically, it pioneers the integration of Polar codes into blockchain consensus to enhance encoding efficiency and fault tolerance; introduces a hierarchical DAG topology coupled with an event-driven smart contract (EDSC) mechanism to simultaneously achieve high intra-chain throughput and strong inter-chain consistency; and adopts a committee-worker dual-node architecture, cross-chain block anchoring, and an asynchronous verification protocol. Experimental results demonstrate that the system achieves a 3.2× improvement in throughput, scales to over one thousand heterogeneous blockchains, increases decentralization by 47%, and significantly strengthens resistance against double-spending and Sybil attacks.

Technology Category

• Search and Optimization: Distributed Search
• Multiagent Systems: Mechanism Design
• Constraint Satisfaction and Optimization: Distributed CSP/Optimization

Application Category

• Security and Privacy: Blockchains and distributed ledgers
• Systems and Infrastructure for Web, Mobile and WoT: Decentralized Web and Fediverse systems
• Responsible Web: Consent frameworks and practices on the web

Abstract

As the digital landscape evolves, Web3 has gained prominence, highlighting the critical role of decentralized, interconnected, and verifiable digital ecosystems. This paper introduces SPID-Chain, a novel interoperability consensus designed for Web3, which employs a directed acyclic graph (DAG) of blockchains to facilitate seamless integration across multiple blockchains. Within SPID-Chain, each blockchain maintains its own consensus and processes transactions via an intra-consensus mechanism that incorporates event-driven smart contracts (EDSC) and Polar codes for optimized computation distribution. This mechanism is complemented by a division of committee and worker nodes, enhancing transaction processing efficiency within individual chains. For inter-blockchain consensus, SPID-Chain utilizes a DAG structure where blockchains append blocks containing cross-chain transactions. These blocks are then processed through the inter-consensus mechanism orchestrated by the blockchains. Extensive simulations validate the efficacy of our scheme in terms of throughput, scalability, decentralization, and security. Our results showcase SPID-Chain's potential to enable fluid interactions and transactions across diverse blockchain networks, aligning with the foundational goals of Web3.

Problem

• Blockchain Interoperability
• Decentralized Cross-Chain Transactions
• Web3 Goals

Innovation

• SPID-Chain
• Cross-chain Transactions
• Decentralized Interoperability