Circle Internet Financial has announced the v2.2 upgrade for its stablecoins, USDC and EURC, offering significant reductions in gas costs and enhanced security for transactions on EVM blockchains. This upgrade includes several key improvements, such as the adoption of EIP-1271 for better account abstraction support, optimization of blocklist checks to decrease gas fees by 6-7% in common use cases, and dynamic chainID inference to improve resiliency against blockchain forks. Additionally, the upgrade eliminates blocklist checks in functions that don't move funds, further reducing gas fees, and introduces a one-time renaming of the EURC token symbol. This enhancement is part of Circle's ongoing efforts to innovate and expand USDC's capabilities, following its recent expansion to six new blockchain networks. The rollout is occurring in phases across multiple testnets and mainnets without requiring any actions from developers or users, and all code changes have been vetted by the security firm Halborn.