L2 Scaling Masterclass is a blockchain product available on the Whop marketplace, created by hesslinghardester and launched in May 2026.

A comprehensive, hands-on course for Solidity developers ready to move beyond Ethereum mainnet. You'll build, test, and deploy real smart contracts across Optimistic Rollups, ZK-Rollups, and Validiums — covering the full stack from protocol internals to gas-optimized production code. What you'll learn: • Rollup Architecture — Understand how Optimistic and ZK-Rollups batch transactions, handle fraud proofs, and finalize state on L1 • Cross-Chain Messaging — Build contracts that communicate between L1 and L2 using canonical bridges and third-party protocols • ZK Circuit Design — Write circuits with Circom and integrate ZK proofs into Solidity contracts for private and scalable execution • Gas Optimization on L2 — Master calldata compression, storage patterns, and batching strategies that cut costs by 10-100x • Protocol Deep Dives — Dissect the internals of Arbitrum, Optimism, zkSync, StarkNet, and Polygon zkEVM with live code walkthroughs • Security & Auditing — Identify L2-specific attack vectors including sequencer manipulation, bridge exploits, and forced inclusion edge cases • Capstone Project — Deploy a full DeFi protocol across multiple L2s with automated bridging and unified liquidity This is not theory. Every module includes production-grade Solidity code, Foundry test suites, and deployment scripts you'll keep as templates for your own projects. Built for developers who already write Solidity and want to ship on the networks where the next wave of users will live.

L2 Scaling Masterclass has is priced at $302/week.

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