Circle Sets CCTP V1 Sunset Dates for Oct 31 and Dec 1
Circle will begin reducing CCTP V1 burn limits on Oct 31 and pause the contracts on Dec 1. V2 requires code changes for TokenMessenger, MessageTransmitter, TokenMinter, depositForBurn calls, and attestation endpoints.

Circle will begin reducing CCTP V1 burn limits on Oct 31 and pause the contracts on Dec 1.
V2 (now simply called CCTP) uses different contract addresses and APIs; integrators must update TokenMessenger, MessageTransmitter, TokenMinter, depositForBurn calls, and attestation endpoints.
Aptos, Noble, and Sui are the only chains currently labeled V1-only; any native CCTP route to or from these chains still depends on the legacy network unless an alternative is used.
Circle states users retain access to funds and pending redemptions remain available during the phase-out.