16_disable_fraud_challenges.ts

import type { HardhatRuntimeEnvironment } from "hardhat/types"
import type { DeployFunction } from "hardhat-deploy/types"

const func: DeployFunction = async (hre: HardhatRuntimeEnvironment) => {
  const { deployments, ethers, getNamedAccounts } = hre
  const { execute } = deployments
  const { deployer } = await getNamedAccounts()

  deployments.log("disabling fraud challenges in the Bridge")

  // To disable the fraud challenge mechanism, we need to make the fraud
  // challenge deposit extremely high. The deposit value is determined by the
  // fraudChallengeDepositAmount governance parameter. This parameter is uint96.
  // The maximum value for the uint96 is 2^96-1 = 79228162514264337593543950335.
  const fraudChallengeDepositAmount = ethers.BigNumber.from(
    "79228162514264337593543950335"
  )

  // To emphasize the fact that frauds are disabled, we set:
  // - fraudChallengeDefeatTimeout to uint32 max value (2^32-1 = 4294967295)
  // - fraudSlashingAmount to zero,
  // - fraudNotifierRewardMultiplier to zero.
  const fraudChallengeDefeatTimeout = ethers.BigNumber.from("4294967295")
  const fraudSlashingAmount = ethers.BigNumber.from("0")
  const fraudNotifierRewardMultiplier = ethers.BigNumber.from("0")

  await execute(
    "Bridge",
    { from: deployer, log: true, waitConfirmations: 1 },
    "updateFraudParameters",
    fraudChallengeDepositAmount,
    fraudChallengeDefeatTimeout,
    fraudSlashingAmount,
    fraudNotifierRewardMultiplier
  )
}

export default func

func.tags = ["DisableFraudChallenges"]
func.dependencies = ["Bridge"]

func.skip = async (hre: HardhatRuntimeEnvironment): Promise<boolean> =>
  hre.network.name !== "mainnet"