Starknet released Twitter that as the first part of Starknet Quantum Leap, Starknet alpha v0.12.0 has been deployed on the Goerli public test network and is currently in the final testing phase before the mainnet supercharge this week. Later this month, Starknet will begin implementing and testing the release of Starknet 0.12.1, which is the second part of the Starknet mainnet Quantum Leap. This version will introduce another major improvement, which is to include failed transactions in the block.
Until now, failed transactions were not included in blocks, so sequencers could not collect fees and provide them with random numbers in advance, causing user experience problems for developers. This change also protects sequencers from users spamming the system without paying for failed transactions.