Add rswETH as collateral to WETH market on Mainnet

deployments/mainnet/weth/migrations/1722853005_add_rsweth_as_collateral.ts

@@ -0,0 +1,132 @@
+import { expect } from 'chai';
+import { DeploymentManager } from '../../../../plugins/deployment_manager/DeploymentManager';
+import { migration } from '../../../../plugins/deployment_manager/Migration';
+import { exp, proposal } from '../../../../src/deploy';
+
+const RSWETH_ADDRESS = '0xFAe103DC9cf190eD75350761e95403b7b8aFa6c0';
+let newPriceFeedAddress: string;
+
+export default migration('1722853005_add_rsweth_as_collateral', {
+  async prepare(deploymentManager: DeploymentManager) {
+    const _rswETHPriceFeed = await deploymentManager.deploy(
+      'rswETH:priceFeed',
+      'pricefeeds/RateBasedScalingPriceFeed.sol',
+      [
+        RSWETH_ADDRESS,                        // rswETH / ETH price feed
+        8,                                     // decimals
+        18,                                    // oracleDecimals
+        'rswETH/ETH exchange rate price feed', // description
+      ]
+    );
+    return { rswETHPriceFeed: _rswETHPriceFeed.address };
+  },
+
+  async enact(deploymentManager: DeploymentManager, _, { rswETHPriceFeed }) {
+
+    const trace = deploymentManager.tracer();
+
+    const rswETH = await deploymentManager.existing(
+      'rswETH',
+      RSWETH_ADDRESS,
+      'mainnet',
+      'contracts/ERC20.sol:ERC20'
+    );
+    const rswEthPricefeed = await deploymentManager.existing(
+      'rswETH:priceFeed',
+      rswETHPriceFeed,
+      'mainnet'
+    );
+
+    newPriceFeedAddress = rswEthPricefeed.address;
+
+    const {
+      governor,
+      comet,
+      cometAdmin,
+      configurator,
+    } = await deploymentManager.getContracts();
+
+    const rswETHAssetConfig = {
+      asset: rswETH.address,
+      priceFeed: rswEthPricefeed.address,
+      decimals: await rswETH.decimals(),
+      borrowCollateralFactor: exp(0.80, 18),
+      liquidateCollateralFactor: exp(0.85, 18),
+      liquidationFactor: exp(0.9, 18),
+      supplyCap: exp(1_000, 18), 
+    };
+
+    const mainnetActions = [
+      // 1. Add rswETH as asset
+      {
+        contract: configurator,
+        signature: 'addAsset(address,(address,address,uint8,uint64,uint64,uint64,uint128))',
+        args: [comet.address, rswETHAssetConfig],
+      },
+      // 2. Deploy and upgrade to a new version of Comet
+      {
+        contract: cometAdmin,
+        signature: 'deployAndUpgradeTo(address,address)',
+        args: [configurator.address, comet.address],
+      },
+    ];
+
+    const description = '# Add rswETH as collateral into cWETHv3 on Mainnet\n\n## Proposal summary\n\nCompound Growth Program [AlphaGrowth] proposes to add rswETH into cWETHv3 on Ethereum network. This proposal takes the governance steps recommended and necessary to update a Compound III WETH market on Ethereum. Simulations have confirmed the market’s readiness, as much as possible, using the [Comet scenario suite](https://github.com/compound-finance/comet/tree/main/scenario). The new parameters include setting the risk parameters based on the [recommendations from Gauntlet](https://www.comp.xyz/t/add-rsweth-as-collateral-to-eth-market-on-mainnet/5308/3).\n\nFurther detailed information can be found on the corresponding [proposal pull request](https://github.com/compound-finance/comet/pull/885) and [forum discussion](https://www.comp.xyz/t/add-rsweth-as-collateral-to-eth-market-on-mainnet/5308).\n\n\n## Proposal Actions\n\nThe first proposal action adds rswETH asset as collateral with corresponding configurations.\n\nThe second action deploys and upgrades Comet to a new version.';
+    const txn = await deploymentManager.retry(async () =>
+      trace(
+        await governor.propose(...(await proposal(mainnetActions, description)))
+      )
+    );
+
+    const event = txn.events.find(
+      (event) => event.event === 'ProposalCreated'
+    );
+    const [proposalId] = event.args;
+    trace(`Created proposal ${proposalId}.`);
+  },
+
+  async enacted(): Promise<boolean> {
+    return true;
+  }, 
+
+  async verify(deploymentManager: DeploymentManager) {
+    const { comet, configurator } = await deploymentManager.getContracts();
+
+    const rswETHAssetIndex = Number(await comet.numAssets()) - 1;
+
+    const rswETH = await deploymentManager.existing(
+      'rswETH',
+      RSWETH_ADDRESS,
+      'mainnet',
+      'contracts/ERC20.sol:ERC20'
+    );
+
+    const rswETHAssetConfig = {
+      asset: rswETH.address,
+      priceFeed: newPriceFeedAddress,
+      decimals: await rswETH.decimals(),
+      borrowCollateralFactor: exp(0.80, 18),
+      liquidateCollateralFactor: exp(0.85, 18),
+      liquidationFactor: exp(0.9, 18),
+      supplyCap: exp(1_000, 18),
+    };
+
+    // 1. Compare rswETH asset config with Comet and Configurator asset info
+    const cometRswETHAssetInfo = await comet.getAssetInfoByAddress(RSWETH_ADDRESS);
+    expect(rswETHAssetIndex).to.be.equal(cometRswETHAssetInfo.offset);
+    expect(rswETHAssetConfig.asset).to.be.equal(cometRswETHAssetInfo.asset);
+    expect(exp(1, rswETHAssetConfig.decimals)).to.be.equal(cometRswETHAssetInfo.scale);
+    expect(rswETHAssetConfig.borrowCollateralFactor).to.be.equal(cometRswETHAssetInfo.borrowCollateralFactor);
+    expect(rswETHAssetConfig.liquidateCollateralFactor).to.be.equal(cometRswETHAssetInfo.liquidateCollateralFactor);
+    expect(rswETHAssetConfig.liquidationFactor).to.be.equal(cometRswETHAssetInfo.liquidationFactor);
+    expect(rswETHAssetConfig.supplyCap).to.be.equal(cometRswETHAssetInfo.supplyCap);
+
+    const configuratorRswETHAssetConfig = (await configurator.getConfiguration(comet.address)).assetConfigs[rswETHAssetIndex];
+    expect(rswETHAssetConfig.asset).to.be.equal(configuratorRswETHAssetConfig.asset);
+    expect(rswETHAssetConfig.decimals).to.be.equal(configuratorRswETHAssetConfig.decimals);
+    expect(rswETHAssetConfig.borrowCollateralFactor).to.be.equal(configuratorRswETHAssetConfig.borrowCollateralFactor);
+    expect(rswETHAssetConfig.liquidateCollateralFactor).to.be.equal(configuratorRswETHAssetConfig.liquidateCollateralFactor);
+    expect(rswETHAssetConfig.liquidationFactor).to.be.equal(configuratorRswETHAssetConfig.liquidationFactor);
+    expect(rswETHAssetConfig.supplyCap).to.be.equal(configuratorRswETHAssetConfig.supplyCap);
+  },
+});