Add ezETH as collateral to WETH market on Optimism (#905)

Co-authored-by: Dmitriy Babenko <[email protected]>
Co-authored-by: GitHub Actions Bot <>

deployments/optimism/weth/migrations/1723475862_add_ezeth_as_collateral.ts

@@ -0,0 +1,150 @@
+import { expect } from 'chai';
+import { DeploymentManager } from '../../../../plugins/deployment_manager/DeploymentManager';
+import { migration } from '../../../../plugins/deployment_manager/Migration';
+import { calldata, exp, proposal } from '../../../../src/deploy';
+import { utils } from 'ethers';
+
+const EZETH_ADDRESS = '0x2416092f143378750bb29b79eD961ab195CcEea5';
+const EZETH_ETH_PRICE_FEED_ADDRESS = '0xFAD40C0e2BeF93c6a822015863045CAAeAAde4d3';
+let newPriceFeedAddress: string;
+
+export default migration('1723475862_add_ezeth_as_collateral', {
+  async prepare(deploymentManager: DeploymentManager) {
+    const _ezETHScalingPriceFeed = await deploymentManager.deploy(
+      'ezETH:priceFeed',
+      'pricefeeds/ScalingPriceFeed.sol',
+      [
+        EZETH_ETH_PRICE_FEED_ADDRESS, // ezETH / ETH price feed
+        8                                             // decimals
+      ]
+    );
+    return { ezETHPriceFeedAddress: _ezETHScalingPriceFeed.address };
+  },
+
+  enact: async (
+    deploymentManager: DeploymentManager,
+    govDeploymentManager: DeploymentManager,
+    { ezETHPriceFeedAddress }
+  ) => {
+    const trace = deploymentManager.tracer();
+
+    const ezETH = await deploymentManager.existing(
+      'ezETH',
+      EZETH_ADDRESS,
+      'optimism',
+      'contracts/ERC20.sol:ERC20'
+    );
+    const ezETHPriceFeed = await deploymentManager.existing(
+      'ezETH:priceFeed',
+      ezETHPriceFeedAddress,
+      'optimism'
+    );
+
+    const {
+      bridgeReceiver,
+      comet,
+      cometAdmin,
+      configurator,
+    } = await deploymentManager.getContracts();
+
+    const { governor, opL1CrossDomainMessenger } = await govDeploymentManager.getContracts();
+
+    const newAssetConfig = {
+      asset: ezETH.address,
+      priceFeed: ezETHPriceFeed.address,
+      decimals: await ezETH.decimals(),
+      borrowCollateralFactor: exp(0.88, 18),
+      liquidateCollateralFactor: exp(0.91, 18),
+      liquidationFactor: exp(0.94, 18),
+      supplyCap: exp(400, 18),
+    };
+
+    newPriceFeedAddress = ezETHPriceFeed.address;
+
+    const addAssetCalldata = await calldata(
+      configurator.populateTransaction.addAsset(comet.address, newAssetConfig)
+    );
+    const deployAndUpgradeToCalldata = utils.defaultAbiCoder.encode(
+      ['address', 'address'],
+      [configurator.address, comet.address]
+    );
+
+    const l2ProposalData = utils.defaultAbiCoder.encode(
+      ['address[]', 'uint256[]', 'string[]', 'bytes[]'],
+      [
+        [configurator.address, cometAdmin.address],
+        [0, 0],
+        [
+          'addAsset(address,(address,address,uint8,uint64,uint64,uint64,uint128))',
+          'deployAndUpgradeTo(address,address)',
+        ],
+        [addAssetCalldata, deployAndUpgradeToCalldata],
+      ]
+    );
+
+    const mainnetActions = [
+      // Send the proposal to the L2 bridge
+      {
+        contract: opL1CrossDomainMessenger,
+        signature: 'sendMessage(address,bytes,uint32)',
+        args: [bridgeReceiver.address, l2ProposalData, 3_000_000]
+      },
+    ];
+
+    const description = '# Add ezETH as collateral into cWETHv3 on Optimism\n\n## Proposal summary\n\nCompound Growth Program [AlphaGrowth] proposes to add ezETH into cWETHv3 on Optimism network. This proposal takes the governance steps recommended and necessary to update a Compound III WETH market on Optimism. 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 off of the [recommendations from Gauntlet](https://www.comp.xyz/t/gauntlet-wsteth-and-ezeth-asset-listing/5404/11).\n\nFurther detailed information can be found on the corresponding [proposal pull request](https://github.com/compound-finance/comet/pull/905) and [forum discussion](https://www.comp.xyz/t/gauntlet-wsteth-and-ezeth-asset-listing/5404).\n\n\n## Proposal Actions\n\nThe first proposal action adds ezETH to the WETH Comet on Optimism. This sends the encoded `addAsset` and `deployAndUpgradeTo` calls across the bridge to the governance receiver on Optimism.';
+    const txn = await govDeploymentManager.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(deploymentManager: DeploymentManager): Promise<boolean> {
+    return true;
+  },
+
+  async verify(deploymentManager: DeploymentManager) {
+    const { comet, configurator } = await deploymentManager.getContracts();
+
+    const ezETHAssetIndex = Number(await comet.numAssets()) - 1;
+
+    const ezETHAssetConfig = {
+      asset: EZETH_ADDRESS,
+      priceFeed: newPriceFeedAddress,
+      decimals: 18,
+      borrowCollateralFactor: exp(0.88, 18),
+      liquidateCollateralFactor: exp(0.91, 18),
+      liquidationFactor: exp(0.94, 18),
+      supplyCap: exp(400, 18),
+    };
+
+    // 1. Compare proposed asset config with Comet asset info
+    const ezETHAssetInfo = await comet.getAssetInfoByAddress(
+      EZETH_ADDRESS
+    );
+    expect(ezETHAssetIndex).to.be.equal(ezETHAssetInfo.offset);
+    expect(ezETHAssetConfig.asset).to.be.equal(ezETHAssetInfo.asset);
+    expect(ezETHAssetConfig.priceFeed).to.be.equal(ezETHAssetInfo.priceFeed);
+    expect(exp(1, ezETHAssetConfig.decimals)).to.be.equal(ezETHAssetInfo.scale);
+    expect(ezETHAssetConfig.borrowCollateralFactor).to.be.equal(ezETHAssetInfo.borrowCollateralFactor);
+    expect(ezETHAssetConfig.liquidateCollateralFactor).to.be.equal(ezETHAssetInfo.liquidateCollateralFactor);
+    expect(ezETHAssetConfig.liquidationFactor).to.be.equal(ezETHAssetInfo.liquidationFactor);
+    expect(ezETHAssetConfig.supplyCap).to.be.equal(ezETHAssetInfo.supplyCap);
+
+    // 2. Compare proposed asset config with Configurator asset config
+    const configuratorEzETHAssetConfig = (await configurator.getConfiguration(comet.address)).assetConfigs[ezETHAssetIndex];
+    expect(ezETHAssetConfig.asset).to.be.equal(configuratorEzETHAssetConfig.asset);
+    expect(ezETHAssetConfig.priceFeed).to.be.equal(configuratorEzETHAssetConfig.priceFeed);
+    expect(ezETHAssetConfig.decimals).to.be.equal(configuratorEzETHAssetConfig.decimals);
+    expect(ezETHAssetConfig.borrowCollateralFactor).to.be.equal(configuratorEzETHAssetConfig.borrowCollateralFactor);
+    expect(ezETHAssetConfig.liquidateCollateralFactor).to.be.equal(configuratorEzETHAssetConfig.liquidateCollateralFactor);
+    expect(ezETHAssetConfig.liquidationFactor).to.be.equal(configuratorEzETHAssetConfig.liquidationFactor);
+    expect(ezETHAssetConfig.supplyCap).to.be.equal(configuratorEzETHAssetConfig.supplyCap);
+  },
+});

deployments/optimism/weth/relations.ts

@@ -43,6 +43,15 @@ export default {
     }
   },
 
+  TransparentUpgradeableProxy: {
+    artifact: 'contracts/ERC20.sol:ERC20',
+    delegates: {
+      field: {
+        slot: '0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc'
+      }
+    }
+  },
+
   // WBTC
   WBTC: {
     artifact: 'contracts/ERC20.sol:ERC20'

scenario/constraints/ProposalConstraint.ts

@@ -62,12 +62,6 @@ export class ProposalConstraint<T extends CometContext> implements StaticConstra
           );
         }
 
-        // temporary hack to skip proposal 281
-        if (proposal.id.eq(281)) {
-          console.log('Skipping proposal 281');
-          continue;
-        }
-
         try {
           // Execute the proposal
           debug(`${label} Processing pending proposal ${proposal.id}`);
@@ -126,4 +120,4 @@ export class ProposalConstraint<T extends CometContext> implements StaticConstra
   async check() {
     return; // XXX
   }
-}
+}