Arc 10 Catch-Up: Designing Solana State with PDAs

Arc 10 of Epoch 3 focused on Program Derived Addresses to improve Solana state design, overcoming the limitations of randomly generated keypairs for user-specific counters. This allowed for better address management and accessibility across devices. Subsequently, Arc 11 explored Cross-Program Invocations, enabling programs to interact. While previous programs operated in isolation, CPIs allow interaction with other programs, such as the System Program or Token-2022, while adhering to Solana's strict security and ownership models.