Chainlink CCIP Release Notes

v1.2.0 release on testnet - 2023-12-08

• There is no change to the router interface, but users must use the new router addresses mentioned in the CCIP v1.2.0 configuration page.

• Added support for USDC transfers. USDC transfers are currently supported on the following lanes:

  • From Optimism Goerli to Avalanche Fuji.
  • From Optimism Goerli to Base Goerli.
  • From Avalanche Fuji to Optimism Goerli.
  • From Avalanche Fuji to Base Goerli.
  • From Base Goerli to Optimism Goerli.
  • From Base Goerli to Avalanche Fuji.

  Refer to the Supported Networks to get a specific lane's token addresses and rate limits.

• We've simplified the message sequencing process in our CCIP message handling by removing the strict sequencing flag. This change affects how messages are processed when using the extraArgs field in CCIP messages.

  • Previous behavior (v1.0.0):

    CCIP always processes messages sent from a specific sender to a specific destination blockchain in the order they were sent. If you set strict: true in the extraArgs part of the message, and if the ccipReceive fails (reverts), it will prevent any following messages from the same sender from being processed until the current message is successfully executed. With this update, the 'strict' flag option is no longer available.

  • Current behavior (v1.2.0):

    CCIP will now always process messages, irrespective of the success or failure of individual messages. This means that even if a ccipReceive fails (reverts) on the destination chain for a given message, subsequent messages will still be processed without interruption.

• The gas limit and maximum message data length for CCIP messages have been adjusted on testnets. These changes are detailed below and in the updated Service Limits documentation.

  • Gas Limit:
    • In v1.0.0, the gas limit is 2,000,000.
    • For v1.2.0, this has been increased to 3,000,000.
  • Maximum Message Data Length:
    • In v1.0.0, the maximum message data length is 50 kilobytes.
    • In v1.2.0, this has been adjusted to 30 kilobytes.

Arbitrum Goerli - 2023-11-17

Arbitrum Goerli is no longer supported.

Arbitrum Sepolia support will be added at a later date.

New mainnets - 2023-09-27

Added BNB and Base mainnets:

• BNB mainnet.
• Base mainnet.

See the supported networks page for more information.

New mainnet - 2023-09-21

Added Arbitrum mainnet:

• Arbitrum mainnet.

See the supported networks page for more information.

New testnets - 2023-08-25

Added BNB and Base testnets:

• BNB testnet.
• Base Goerli.

See the supported networks page for more information.

Testnet GA release - 2023-07-20

Chainlink CCIP is publicly available on the following testnet chains:

• Ethereum Sepolia.
• Optimism Goerli.
• Avalanche Fuji.
• Arbitrum Goerli.
• Polygon Mumbai.

See the supported networks page for more information.

Mainnet Early Access - 2023-07-17

Chainlink CCIP is available on the following networks:

• Ethereum mainnet.
• Optimism mainnet.
• Avalanche mainnet.
• Polygon mainnet.

See the supported networks page for more information.