Circle plans to reduce the burn limits of the legacy Cross-Chain Transfer Protocol, CCTP V1, starting October 31, 2026, before pausing the contracts on December 1. Applications still incompatible with CCTP V2 will need to update their contracts, application programming interfaces and calls to continue transferring USDC across blockchains. Transfer volume is expected to gradually reach zero before the full pause, while pending redemptions will remain available because Circle will maintain sufficient minting capacity. CCTP V2 introduces two transfer modes and programmable hooks, along with new addresses and interfaces, but the replaceDepositForBurn function has no equivalent.
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