IntroductionAs Ethereum scales, Layer 2 (L2) solutions have emerged to solve issues like high fees and network congestion while maintaining security and decentralization. However, the interaction between Ethereum (Layer 1, or L1) and these L2 solutions presents challenges, especially for asset transfers, transaction bridging, and data integrity. This article delves into L1/L2 interoperability with a focus on Scroll, a zkEVM-based rollup closely integrated with Ethereum. We’ll explore concepts...