The Multi-Chain Ecosystem: L2s & Interoperability

Deploy and verify a contract to an Ethereum Layer 2 network (e.g., Arbitrum, Optimism).

Describe the architectures and security trade-offs of different cross-chain communication patterns (e.g., native bridges, third-party protocols).

Implement a simple contract on a source chain that sends a message using a generic messaging protocol (e.g., LayerZero, CCIP).

Implement a corresponding contract on a destination chain that receives and processes the message.

Write a script to deploy and test the end-to-end cross-chain communication flow between two testnets.