<ul><li>Omnichain smart contracts enable decentralized applications to function across multiple blockchain networks.</li><li>Key design patterns for omnichain smart contracts include the Proxy Contract Pattern, Event-Driven Messaging Pattern, Hash Time-Locked Contracts (HTLCs), Multi-Signature and Governance Patterns, and Liquidity Pool Bridging.</li><li>Challenges in implementing omnichain smart contracts include cross-chain security risks, message passing and latency issues, smart contract upgradability, gas fee variability, and regulatory and compliance issues.</li><li>The future of omnichain smart contracts includes innovations such as Zero-Knowledge Proofs (ZKPs), AI-driven automation, and quantum-resistant cryptographic methods.</li></ul>

Omnichain Smart Contracts: Design Patterns and Implementation Challenges

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