Circle phases out old USDC bridge as CCTP V2 takes over

Traders Union
All News
Crypto
Circle to halt CCTP V1 transfers

Highlights

CCTP V1 transfer limits tighten on October 31.
Legacy USDC bridge shuts down on December 1.
CCTP V2 supports 31 blockchain networks.

Cryptopolitan reported that Circle plans to progressively reduce transfer limits throughout November before suspending the older protocol. The company announced the migration timetable on August 27, following an initial warning in November 2025 that support for the original infrastructure would eventually end.

Transfer limits tighten ahead of December deadline

CCTP allows USDC to move between supported blockchains without relying on traditional wrapped tokens. The protocol destroys tokens on the originating network and issues an equivalent amount on the destination blockchain after Circle verifies the transaction.

Beginning October 31, Circle will gradually lower the amount of USDC that applications can burn through V1. These restrictions are intended to discourage new activity while allowing developers to complete their migration before the December shutdown.

Applications still connected to V1 contracts after December 1 will lose the ability to initiate cross-chain USDC transfers through those integrations. Circle expects outstanding transactions to remain manageable by maintaining sufficient minting capacity to settle transfers awaiting verification.

Most supported networks have already adopted the newer protocol. Noble remains an exception because it will not receive CCTP V2, requiring a separate withdrawal and redemption timetable.

CCTP V2 introduces new contracts and transfer options

Migrating applications must update their contract addresses, transaction functions, and verification procedures. CCTP V2 uses TokenMessengerV2 and MessageTransmitterV2, replacing interfaces that are incompatible with the newer infrastructure.

The updated depositForBurn function introduces parameters covering destination authorization, maximum transaction fees, and minimum finality requirements. Developers must also retrieve transaction messages through a dedicated API rather than reconstructing them from blockchain transaction data.

CCTP V2 supports 31 blockchains, including Sui, and offers Standard and Fast Transfer options. Fast Transfer fees vary depending on the originating network, while programmable hooks allow applications to trigger additional operations after USDC reaches its destination.

Developers face operational risks as migration window closes

The shutdown creates a firm deadline for exchanges, wallets, and decentralized finance applications that depend on cross-chain USDC transfers. Services that fail to migrate could experience interrupted transactions, affecting users attempting to move funds between networks.

Noble faces a different schedule. New USDC minting was scheduled to end October 13, while its existing token contract and cross-chain routes will cease operating January 12, 2027. Manual redemption will become available the following day.

Circle's transition also reflects the growing importance of reliable stablecoin infrastructure as USDC expands across blockchain networks. With V2 supporting 31 chains, developers must balance new functionality against the technical work required to maintain uninterrupted transfers.

As we previously reported, Circle plans to expand USDC into 40 new markets.

This material may contain third-party opinions, none of the data and information on this webpage constitutes investment advice according to our Disclaimer. While we adhere to strict Editorial Integrity, this post may contain references to products from our partners.