A comprehensive course designed for blockchain developers and aspiring smart contract auditors who want to master layer-2 scaling solutions. You’ll go deep into optimistic rollups, zk-rollups, state channels, validiums, and cross-layer messaging — learning not just how they work, but how to identify the vulnerabilities that attackers exploit.

Each module pairs architectural theory with hands-on auditing exercises drawn from real protocol incidents. You’ll dissect actual exploit post-mortems, write custom invariant tests for L2 bridge contracts, and learn to evaluate the security assumptions underpinning sequencer designs, fraud proofs, and validity proofs.

By the end of this course, you’ll be equipped to conduct professional-grade security reviews of any layer-2 protocol — from the EVM-equivalent rollup to the bleeding-edge zk-coprocessor.