According to official sources, Starknet mainnet will upgrade to version 0.12.1 next week. This upgrade is the second phase of the Starknet mainnet's "quantum leap" and aims to improve transaction efficiency. Starknet stated that currently, invalid transactions waste valuable sorter resources without paying fees.

This upgrade adds a verification stage before sorting to filter out invalid transactions as early as possible. Failed transactions will have a REVERTED status included in the block and will pay fees.