WarpMessenger Precompile

The WarpMessenger Precompile is used to perform cross chain operations among Avalanche L1s.

Warp Precompile enabled cross-blockchain communication between other Layer 1s and primary-network (C-Chain) by leveraging the Avalanche P-Chain. In order to use Warp messaging, Subnet-EVM chains must activate their Warp precompiles. Warp can be activated with the following lines in upgrade.json:

{
  "warpConfig": {
    "blockTimestamp": (uint),
    "quorumNumerator": (uint)
  }
}

blockTimestamp must be set to a timestamp after Durango date. quorumNumerator is the stake percentage of validators that must sign a Warp message for it to be considered valid. It must be set to a value between 33 and 100. The default value is 67. The warpConfig precompile can be later disabled by setting disable to true in the upgrade.json file.

If you want to use Warp messaging in an existing Subnet-EVM chain, you should coordinate an upgrade with upgrade.json. See Network Upgrades: Enable/Disable Precompiles for more information.