MODULE 2: Ethereum Layer 2s and OPTIMISM This POAP represents your completion of the SOLIDITY (3rd and 4th) modules of the OPTIMISM blockchain course at Cenfotec University in Costa Rica. By holding this, you are recognized as one of the first students to ever attend and finish this first Solidity module in the country! Congratulations on your achievement and your pioneering spirit in the world of blockchain technology!