Example Comet migration script.

1667402436_add_zrx_collateral.ts

import { DeploymentManager } from '../../../../plugins/deployment_manager/DeploymentManager';
import { migration } from '../../../../plugins/deployment_manager/Migration';
import { exp, proposal } from '../../../../src/deploy';

interface Vars {};

export default migration('1666716251_add_zrx_collateral', {
  prepare: async (deploymentManager: DeploymentManager) => {
    return {};
  },

  enact: async (governanceDeploymentManager: DeploymentManager, vars: Vars) => {
    const trace = governanceDeploymentManager.tracer();
    const ethers = governanceDeploymentManager.hre.ethers;

    const zrx = await governanceDeploymentManager.existing('ZRX', '0xE41d2489571d322189246DaFA5ebDe1F4699F498');
    const zrxPricefeed = await governanceDeploymentManager.existing('ZRX:priceFeed', '0x2885d15b8Af22648b98B122b22FDF4D2a56c6023');

    const {
      governor,
      comet,
      configurator,
      cometAdmin,
    } = await governanceDeploymentManager.getContracts();

    const newAssetConfig = {
      asset: zrx.address,
      priceFeed: zrxPricefeed.address,
      decimals: await zrx.decimals(),
      borrowCollateralFactor: exp(0.8, 18),
      liquidateCollateralFactor: exp(0.85, 18),
      liquidationFactor: exp(0.95, 18),
      supplyCap: exp(10000000, 18),
    };

    const actions = [

      // 1. Call the add asset function on the configurator contract
      {
        contract: configurator,
        signature: 'addAsset(address,(address,address,uint8,uint64,uint64,uint64,uint128))',
        args: [comet.address, newAssetConfig],
      },

      // 2. Deploy and upgrade to a new version of Comet
      {
        contract: cometAdmin,
        signature: 'deployAndUpgradeTo(address,address)',
        args: [configurator.address, comet.address],
      },

    ];
    const description = "# Add ZRX as Collateral to cUSDCv3 Mainnet\nThis proposal adds ZRX as collateral.\n";
    const txn = await governanceDeploymentManager.retry(
      async () => governor.propose(...await proposal(actions, description))
    );
    trace(txn);

    const event = (await txn.wait()).events.find(event => event.event === 'ProposalCreated');
    const [proposalId] = event.args;
    trace(`Created proposal ${proposalId}.`);
  }
});