The first native Cross-L1 message was sent on Avalanche Mainnet using Avalanche Warp Messaging (AWM) on December 22nd, 2022. Following this milestone, ACP-30 proposed activating AWM on the C-Chain and Subnet-EVM. Activating this ACP brings native cross-chain communication to every EVM Chain in the Avalanche Ecosystem and establishes a standard for future VMs to communicate using AWM.

With AWM, there are no third-party intermediaries or trust assumptions outside of the validator set of the Primary Network and the communicating L1s. With only the validators of an L1, every Avalanche L1 can send messages to one another. AWM leverages the Avalanche P-Chain as a registry of all L1s’ validator sets including a BLS Public Key for each validator.
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To learn more about this update, please view the following article.

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