From d940b1a775298b69571308ce80bc0aa2d4522dbf Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Thu, 12 Sep 2024 23:18:21 +0300
Subject: [PATCH 01/12] feat: add migration and type fix

---
 .../pricefeeds/METHExchangeRatePriceFeed.sol  |  99 ++++++++++++
 contracts/vendor/mantle/IRateProvider.sol     |   6 +
 .../1726138937_add_meth_collateral.ts         | 145 ++++++++++++++++++
 deployments/mainnet/usdt/relations.ts         |  10 +-
 scenario/SupplyScenario.ts                    |   2 +-
 scenario/constraints/ProposalConstraint.ts    |   6 +-
 scenario/constraints/SupplyCapConstraint.ts   |   5 +-
 7 files changed, 267 insertions(+), 6 deletions(-)
 create mode 100644 contracts/pricefeeds/METHExchangeRatePriceFeed.sol
 create mode 100644 contracts/vendor/mantle/IRateProvider.sol
 create mode 100644 deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts

diff --git a/contracts/pricefeeds/METHExchangeRatePriceFeed.sol b/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
new file mode 100644
index 000000000..f8868ca9c
--- /dev/null
+++ b/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity 0.8.15;
+
+import "../vendor/mantle/IRateProvider.sol";
+import "../IPriceFeed.sol";
+
+/**
+ * @title mETH Scaling price feed
+ * @notice A custom price feed that scales up or down the price received from an underlying Renzo mETH / ETH exchange rate price feed and returns the result
+ * @author Compound
+ */
+contract METHExchangeRatePriceFeed is IPriceFeed {
+    /** Custom errors **/
+    error InvalidInt256();
+    error BadDecimals();
+
+    /// @notice Version of the price feed
+    uint public constant VERSION = 1;
+
+    /// @notice Description of the price feed
+    string public description;
+
+    /// @notice Number of decimals for returned prices
+    uint8 public immutable override decimals;
+
+    /// @notice mETH price feed where prices are fetched from
+    address public immutable underlyingPriceFeed;
+
+    /// @notice Whether or not the price should be upscaled
+    bool internal immutable shouldUpscale;
+
+    /// @notice The amount to upscale or downscale the price by
+    int256 internal immutable rescaleFactor;
+
+    /**
+     * @notice Construct a new mETH scaling price feed
+     * @param mETHRateProvider The address of the underlying price feed to fetch prices from
+     * @param decimals_ The number of decimals for the returned prices
+     **/
+    constructor(address mETHRateProvider, uint8 decimals_, string memory description_) {
+        underlyingPriceFeed = mETHRateProvider;
+        if (decimals_ > 18) revert BadDecimals();
+        decimals = decimals_;
+        description = description_;
+
+        uint8 mETHRateProviderDecimals = 18;
+        // Note: Solidity does not allow setting immutables in if/else statements
+        shouldUpscale = mETHRateProviderDecimals < decimals_ ? true : false;
+        rescaleFactor = (shouldUpscale
+            ? signed256(10 ** (decimals_ - mETHRateProviderDecimals))
+            : signed256(10 ** (mETHRateProviderDecimals - decimals_))
+        );
+    }
+
+    /**
+     * @notice Price for the latest round
+     * @return roundId Round id from the underlying price feed
+     * @return answer Latest price for the asset in terms of ETH
+     * @return startedAt Timestamp when the round was started; passed on from underlying price feed
+     * @return updatedAt Timestamp when the round was last updated; passed on from underlying price feed
+     * @return answeredInRound Round id in which the answer was computed; passed on from underlying price feed
+     **/
+    function latestRoundData() override external view returns (
+        uint80 roundId,
+        int256 answer,
+        uint256 startedAt,
+        uint256 updatedAt,
+        uint80 answeredInRound
+    ) {
+        // https://etherscan.io/address/0xe3cBd06D7dadB3F4e6557bAb7EdD924CD1489E8f#readProxyContract#F19
+        // rate = 1 mETH in ETH
+        uint256 rate = IRateProvider(underlyingPriceFeed).mETHToETH(1e18);
+        // protocol uses only the answer value. Other data fields are not provided by the underlying pricefeed and are not used in Comet protocol
+        return (1, scalePrice(signed256(rate)), block.timestamp, block.timestamp, 1);
+    }
+
+    function signed256(uint256 n) internal pure returns (int256) {
+        if (n > uint256(type(int256).max)) revert InvalidInt256();
+        return int256(n);
+    }
+
+    function scalePrice(int256 price) internal view returns (int256) {
+        int256 scaledPrice;
+        if (shouldUpscale) {
+            scaledPrice = price * rescaleFactor;
+        } else {
+            scaledPrice = price / rescaleFactor;
+        }
+        return scaledPrice;
+    }
+
+    /**
+     * @notice Price for the latest round
+     * @return The version of the price feed contract
+     **/
+    function version() external pure returns (uint256) {
+        return VERSION;
+    }
+}
diff --git a/contracts/vendor/mantle/IRateProvider.sol b/contracts/vendor/mantle/IRateProvider.sol
new file mode 100644
index 000000000..d6e994837
--- /dev/null
+++ b/contracts/vendor/mantle/IRateProvider.sol
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity 0.8.15;
+
+interface IRateProvider {
+    function mETHToETH(uint256) external view returns (uint256);
+} 
diff --git a/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts b/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts
new file mode 100644
index 000000000..7093c8578
--- /dev/null
+++ b/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts
@@ -0,0 +1,145 @@
+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 METH_ADDRESS = '0xd5F7838F5C461fefF7FE49ea5ebaF7728bB0ADfa';
+const METH_EXCHANGE_RATE_PROVIDER_ADDRESS = '0xe3cBd06D7dadB3F4e6557bAb7EdD924CD1489E8f';
+let newPriceFeedAddress: string;
+
+export default migration('1726138937_add_meth_collateral', {
+  async prepare(deploymentManager: DeploymentManager) {
+    const _mETHToETHPriceFeed = await deploymentManager.deploy(
+      'mETH:priceFeedToETH',
+      'pricefeeds/METHExchangeRatePriceFeed.sol',
+      [
+        METH_EXCHANGE_RATE_PROVIDER_ADDRESS, // mETH / ETH price feed
+        8,                                   // decimals
+        'mETH/ETH exchange rate',            // description
+      ]
+    );
+    const ethToUSDPriceFeed = await deploymentManager.fromDep('WETH:priceFeed', 'mainnet', 'usdt');
+
+    const _mETHPriceFeed = await deploymentManager.deploy(
+      'mETH:priceFeed',
+      'pricefeeds/MultiplicativePriceFeed.sol',
+      [
+        _mETHToETHPriceFeed.address,  // mETH / ETH price feed
+        ethToUSDPriceFeed.address,    // ETH / USD price feed
+        8,                            // decimals
+        'wstETH / ETH price feed'     // description
+      ]
+    );
+    return { mETHPriceFeedAddress: _mETHPriceFeed.address };
+  },
+
+  async enact(deploymentManager: DeploymentManager, _, { mETHPriceFeedAddress }) {
+
+    const trace = deploymentManager.tracer();
+
+    const mETH = await deploymentManager.existing(
+      'mETH',
+      METH_ADDRESS,
+      'mainnet',
+      'contracts/ERC20.sol:ERC20'
+    );
+    const mEthPriceFeed = await deploymentManager.existing(
+      'mETH:priceFeed',
+      mETHPriceFeedAddress,
+      'mainnet'
+    );
+
+    newPriceFeedAddress = mEthPriceFeed.address;
+
+    const {
+      governor,
+      comet,
+      cometAdmin,
+      configurator,
+    } = await deploymentManager.getContracts();
+
+    const mETHAssetConfig = {
+      asset: mETH.address,
+      priceFeed: mEthPriceFeed.address,
+      decimals: await mETH.decimals(),
+      borrowCollateralFactor: exp(0.8, 18),
+      liquidateCollateralFactor: exp(0.85, 18),
+      liquidationFactor: exp(0.95, 18),
+      supplyCap: exp(4000, 18),
+    };
+
+    const mainnetActions = [
+      // 1. Add mETH as asset
+      {
+        contract: configurator,
+        signature: 'addAsset(address,(address,address,uint8,uint64,uint64,uint64,uint128))',
+        args: [comet.address, mETHAssetConfig],
+      },
+      // 2. Deploy and upgrade to a new version of Comet
+      {
+        contract: cometAdmin,
+        signature: 'deployAndUpgradeTo(address,address)',
+        args: [configurator.address, comet.address],
+      },
+    ];
+
+    const description = '# Add mETH as collateral into cUSDTv3 on Mainnet\n\n## Proposal summary\n\nCompound Growth Program [AlphaGrowth] proposes to add mETH into cUSDTv3 on Ethereum network. This proposal takes the governance steps recommended and necessary to update a Compound III USDT 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-meth-market-on-ethereum/5647/5).\n\nFurther detailed information can be found on the corresponding [proposal pull request](https://github.com/compound-finance/comet/pull/917) and [forum discussion](https://www.comp.xyz/t/add-meth-market-on-ethereum/5647).\n\n\n## Proposal Actions\n\nThe first action adds mETH 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 false;
+  },
+
+  async verify(deploymentManager: DeploymentManager) {
+    const { comet, configurator } = await deploymentManager.getContracts();
+
+    const mETHAssetIndex = Number(await comet.numAssets()) - 1;
+
+    const mETH = await deploymentManager.existing(
+      'mETH',
+      METH_ADDRESS,
+      'mainnet',
+      'contracts/ERC20.sol:ERC20'
+    );
+    const mETHAssetConfig = {
+      asset: mETH.address,
+      priceFeed: newPriceFeedAddress,
+      decimals: await mETH.decimals(),
+      borrowCollateralFactor: exp(0.8, 18),
+      liquidateCollateralFactor: exp(0.85, 18),
+      liquidationFactor: exp(0.95, 18),
+      supplyCap: exp(4000, 18),
+    };
+
+    // 1. Compare mETH asset config with Comet and Configurator asset info
+    const cometMETHAssetInfo = await comet.getAssetInfoByAddress(METH_ADDRESS);
+    expect(mETHAssetIndex).to.be.equal(cometMETHAssetInfo.offset);
+    expect(mETHAssetConfig.asset).to.be.equal(cometMETHAssetInfo.asset);
+    expect(mETHAssetConfig.priceFeed).to.be.equal(cometMETHAssetInfo.priceFeed);
+    expect(exp(1, mETHAssetConfig.decimals)).to.be.equal(cometMETHAssetInfo.scale);
+    expect(mETHAssetConfig.borrowCollateralFactor).to.be.equal(cometMETHAssetInfo.borrowCollateralFactor);
+    expect(mETHAssetConfig.liquidateCollateralFactor).to.be.equal(cometMETHAssetInfo.liquidateCollateralFactor);
+    expect(mETHAssetConfig.liquidationFactor).to.be.equal(cometMETHAssetInfo.liquidationFactor);
+    expect(mETHAssetConfig.supplyCap).to.be.equal(cometMETHAssetInfo.supplyCap);
+
+    const configuratorMETHAssetConfig = (await configurator.getConfiguration(comet.address)).assetConfigs[mETHAssetIndex];
+    expect(mETHAssetConfig.asset).to.be.equal(configuratorMETHAssetConfig.asset);
+    expect(mETHAssetConfig.priceFeed).to.be.equal(configuratorMETHAssetConfig.priceFeed);
+    expect(mETHAssetConfig.decimals).to.be.equal(configuratorMETHAssetConfig.decimals);
+    expect(mETHAssetConfig.borrowCollateralFactor).to.be.equal(configuratorMETHAssetConfig.borrowCollateralFactor);
+    expect(mETHAssetConfig.liquidateCollateralFactor).to.be.equal(configuratorMETHAssetConfig.liquidateCollateralFactor);
+    expect(mETHAssetConfig.liquidationFactor).to.be.equal(configuratorMETHAssetConfig.liquidationFactor);
+    expect(mETHAssetConfig.supplyCap).to.be.equal(configuratorMETHAssetConfig.supplyCap);
+  },
+});
diff --git a/deployments/mainnet/usdt/relations.ts b/deployments/mainnet/usdt/relations.ts
index 7d7c02b2a..59fabbc80 100644
--- a/deployments/mainnet/usdt/relations.ts
+++ b/deployments/mainnet/usdt/relations.ts
@@ -19,5 +19,13 @@ export default {
   },
   'AppProxyUpgradeable': {
     artifact: 'contracts/ERC20.sol:ERC20',
-  }
+  },
+  'TransparentUpgradeableProxy': {
+    artifact: 'contracts/ERC20.sol:ERC20',
+    delegates: {
+      field: {
+        slot: '0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc'
+      }
+    }
+  },
 };
\ No newline at end of file
diff --git a/scenario/SupplyScenario.ts b/scenario/SupplyScenario.ts
index f9075208b..7082f87a6 100644
--- a/scenario/SupplyScenario.ts
+++ b/scenario/SupplyScenario.ts
@@ -300,7 +300,7 @@ scenario(
     const utilization = await comet.getUtilization();
     const borrowRate = (await comet.getBorrowRate(utilization)).toBigInt();
 
-    expectApproximately(await albert.getCometBaseBalance(), -999n * scale, getInterest(999n * scale, borrowRate, 1n) + 1n);
+    expectApproximately(await albert.getCometBaseBalance(), -999n * scale, getInterest(999n * scale, borrowRate, 1n) + 2n);
 
     // Albert repays 1000 units of base borrow
     await baseAsset.approve(albert, comet.address);
diff --git a/scenario/constraints/ProposalConstraint.ts b/scenario/constraints/ProposalConstraint.ts
index f1b9fa204..36d792478 100644
--- a/scenario/constraints/ProposalConstraint.ts
+++ b/scenario/constraints/ProposalConstraint.ts
@@ -62,9 +62,9 @@ export class ProposalConstraint<T extends CometContext> implements StaticConstra
           );
         }
 
-        // temporary hack to skip proposal 281
-        if (proposal.id.eq(281)) {
-          console.log('Skipping proposal 281');
+        // temporary hack to skip proposal 329
+        if (proposal.id.eq(329)) {
+          console.log('Skipping proposal 329');
           continue;
         }
 
diff --git a/scenario/constraints/SupplyCapConstraint.ts b/scenario/constraints/SupplyCapConstraint.ts
index 8a71312af..1842b73f0 100644
--- a/scenario/constraints/SupplyCapConstraint.ts
+++ b/scenario/constraints/SupplyCapConstraint.ts
@@ -7,7 +7,10 @@ import { ComparisonOp, getAssetFromName, parseAmount } from '../utils';
 
 export class SupplyCapConstraint<T extends CometContext, R extends Requirements> implements Constraint<T, R> {
   async solve(requirements: R, _initialContext: T) {
-    const supplyCaps = requirements.supplyCaps;
+    let supplyCaps = requirements.supplyCaps;
+    if (typeof supplyCaps === 'function') {
+      supplyCaps = await supplyCaps(_initialContext);
+    }
     if (supplyCaps !== undefined) {
       const solutions: Solution<T>[] = [];
       solutions.push(async function barelyMeet(context: T) {

From fe9a21cda48ca81cff67e040df1f90c1ed0bf7ec Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Fri, 13 Sep 2024 11:03:34 +0300
Subject: [PATCH 02/12] fix: update pr link

---
 .../mainnet/usdt/migrations/1726138937_add_meth_collateral.ts   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts b/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts
index 7093c8578..692359fe6 100644
--- a/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts
+++ b/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts
@@ -83,7 +83,7 @@ export default migration('1726138937_add_meth_collateral', {
       },
     ];
 
-    const description = '# Add mETH as collateral into cUSDTv3 on Mainnet\n\n## Proposal summary\n\nCompound Growth Program [AlphaGrowth] proposes to add mETH into cUSDTv3 on Ethereum network. This proposal takes the governance steps recommended and necessary to update a Compound III USDT 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-meth-market-on-ethereum/5647/5).\n\nFurther detailed information can be found on the corresponding [proposal pull request](https://github.com/compound-finance/comet/pull/917) and [forum discussion](https://www.comp.xyz/t/add-meth-market-on-ethereum/5647).\n\n\n## Proposal Actions\n\nThe first action adds mETH asset as collateral with corresponding configurations.\n\nThe second action deploys and upgrades Comet to a new version.';
+    const description = '# Add mETH as collateral into cUSDTv3 on Mainnet\n\n## Proposal summary\n\nCompound Growth Program [AlphaGrowth] proposes to add mETH into cUSDTv3 on Ethereum network. This proposal takes the governance steps recommended and necessary to update a Compound III USDT 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-meth-market-on-ethereum/5647/5).\n\nFurther detailed information can be found on the corresponding [proposal pull request](https://github.com/compound-finance/comet/pull/918) and [forum discussion](https://www.comp.xyz/t/add-meth-market-on-ethereum/5647).\n\n\n## Proposal Actions\n\nThe first action adds mETH 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)))

From 69f9891c93d54d3f714cf14963b0b6329fefbb2b Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Fri, 13 Sep 2024 15:22:04 +0300
Subject: [PATCH 03/12] fix: working workflow

---
 .github/workflows/deploy-market.yaml     | 2 +-
 .github/workflows/prepare-migration.yaml | 2 +-
 .github/workflows/run-scenarios.yaml     | 2 +-
 .github/workflows/run-unit-tests.yaml    | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/deploy-market.yaml b/.github/workflows/deploy-market.yaml
index 5de6eb684..eb1b1d90b 100644
--- a/.github/workflows/deploy-market.yaml
+++ b/.github/workflows/deploy-market.yaml
@@ -77,7 +77,7 @@ jobs:
           NETWORK_PROVIDER: ${{ fromJSON('["", "http://localhost:8585"]')[github.event.inputs.eth_pk == ''] }}
           REMOTE_ACCOUNTS: ${{ fromJSON('["", "true"]')[github.event.inputs.eth_pk == ''] }}
 
-      - uses: actions/upload-artifact@v2 # upload test results
+      - uses: actions/upload-artifact@v4 # upload test results
         if: success() || failure() # run this step even if previous step failed
         with:
           name: ${{ github.event.inputs.network }}-${{ github.event.inputs.deployment }}-verify-args
diff --git a/.github/workflows/prepare-migration.yaml b/.github/workflows/prepare-migration.yaml
index c27bc569e..1bbaa6646 100644
--- a/.github/workflows/prepare-migration.yaml
+++ b/.github/workflows/prepare-migration.yaml
@@ -77,7 +77,7 @@ jobs:
           NETWORK_PROVIDER: ${{ fromJSON('["", "http://localhost:8585"]')[github.event.inputs.eth_pk == ''] }}
           REMOTE_ACCOUNTS: ${{ fromJSON('["", "true"]')[github.event.inputs.eth_pk == ''] }}
 
-      - uses: actions/upload-artifact@v2 # upload test results
+      - uses: actions/upload-artifact@v4 # upload test results
         if: success() || failure() # run this step even if previous step failed
         with:
           name: ${{ github.event.inputs.network }}-${{ github.event.inputs.deployment }}-${{ github.event.inputs.migration }}
diff --git a/.github/workflows/run-scenarios.yaml b/.github/workflows/run-scenarios.yaml
index 0fecdd98c..6ae46e623 100644
--- a/.github/workflows/run-scenarios.yaml
+++ b/.github/workflows/run-scenarios.yaml
@@ -54,7 +54,7 @@ jobs:
       - name: Run scenarios
         run: yarn scenario --bases ${{ matrix.bases }}
 
-      - uses: actions/upload-artifact@v2 # upload scenario results
+      - uses: actions/upload-artifact@v4 # upload scenario results
         if: success() || failure() # run this step even if previous step failed
         with:
           name: scenario-results
diff --git a/.github/workflows/run-unit-tests.yaml b/.github/workflows/run-unit-tests.yaml
index d198e156e..849ae43b8 100644
--- a/.github/workflows/run-unit-tests.yaml
+++ b/.github/workflows/run-unit-tests.yaml
@@ -34,7 +34,7 @@ jobs:
       - name: Run tests
         run: yarn test
 
-      - uses: actions/upload-artifact@v2  # upload test results
+      - uses: actions/upload-artifact@v4  # upload test results
         if: success() || failure()        # run this step even if previous step failed
         with:
           name: test-results

From 9ce23e4b02a80be0ce713a131fc4b8e94c087dc1 Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Fri, 13 Sep 2024 15:27:28 +0300
Subject: [PATCH 04/12] fix: additional workflow fixes

---
 .github/workflows/deploy-market.yaml       | 4 ++--
 .github/workflows/enact-migration.yaml     | 4 ++--
 .github/workflows/prepare-migration.yaml   | 4 ++--
 .github/workflows/run-contract-linter.yaml | 4 ++--
 .github/workflows/run-coverage.yaml        | 4 ++--
 .github/workflows/run-eslint.yaml          | 4 ++--
 .github/workflows/run-forge-tests.yaml     | 2 +-
 .github/workflows/run-gas-profiler.yaml    | 4 ++--
 .github/workflows/run-scenarios.yaml       | 6 +++---
 .github/workflows/run-semgrep.yaml         | 6 +++---
 .github/workflows/run-slither.yaml         | 4 ++--
 .github/workflows/run-unit-tests.yaml      | 4 ++--
 12 files changed, 25 insertions(+), 25 deletions(-)

diff --git a/.github/workflows/deploy-market.yaml b/.github/workflows/deploy-market.yaml
index eb1b1d90b..fe6e35024 100644
--- a/.github/workflows/deploy-market.yaml
+++ b/.github/workflows/deploy-market.yaml
@@ -53,9 +53,9 @@ jobs:
         if: github.event.inputs.eth_pk == ''
 
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
diff --git a/.github/workflows/enact-migration.yaml b/.github/workflows/enact-migration.yaml
index f3a5e4524..b3202dbed 100644
--- a/.github/workflows/enact-migration.yaml
+++ b/.github/workflows/enact-migration.yaml
@@ -85,9 +85,9 @@ jobs:
         if: github.event.inputs.eth_pk == '' && env.GOV_NETWORK != ''
 
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
diff --git a/.github/workflows/prepare-migration.yaml b/.github/workflows/prepare-migration.yaml
index 1bbaa6646..9d6206a18 100644
--- a/.github/workflows/prepare-migration.yaml
+++ b/.github/workflows/prepare-migration.yaml
@@ -53,9 +53,9 @@ jobs:
         if: github.event.inputs.eth_pk == ''
 
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
diff --git a/.github/workflows/run-contract-linter.yaml b/.github/workflows/run-contract-linter.yaml
index b027b58fb..2513cc18c 100644
--- a/.github/workflows/run-contract-linter.yaml
+++ b/.github/workflows/run-contract-linter.yaml
@@ -15,11 +15,11 @@ jobs:
       LINEASCAN_KEY: ${{ secrets.LINEASCAN_KEY }}
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
diff --git a/.github/workflows/run-coverage.yaml b/.github/workflows/run-coverage.yaml
index e2272a9d5..b28829b56 100644
--- a/.github/workflows/run-coverage.yaml
+++ b/.github/workflows/run-coverage.yaml
@@ -18,9 +18,9 @@ jobs:
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           cache: 'yarn'
           node-version: '16'
diff --git a/.github/workflows/run-eslint.yaml b/.github/workflows/run-eslint.yaml
index 9763d45d4..1961fec4c 100644
--- a/.github/workflows/run-eslint.yaml
+++ b/.github/workflows/run-eslint.yaml
@@ -16,9 +16,9 @@ jobs:
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           cache: 'yarn'
           node-version: '16'
diff --git a/.github/workflows/run-forge-tests.yaml b/.github/workflows/run-forge-tests.yaml
index 069a30bdb..6a10f7523 100644
--- a/.github/workflows/run-forge-tests.yaml
+++ b/.github/workflows/run-forge-tests.yaml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           submodules: recursive
 
diff --git a/.github/workflows/run-gas-profiler.yaml b/.github/workflows/run-gas-profiler.yaml
index d2418ad42..d49ba9152 100644
--- a/.github/workflows/run-gas-profiler.yaml
+++ b/.github/workflows/run-gas-profiler.yaml
@@ -17,9 +17,9 @@ jobs:
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
diff --git a/.github/workflows/run-scenarios.yaml b/.github/workflows/run-scenarios.yaml
index 6ae46e623..b651c8880 100644
--- a/.github/workflows/run-scenarios.yaml
+++ b/.github/workflows/run-scenarios.yaml
@@ -22,17 +22,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           cache: 'yarn'
           node-version: '16'
 
       - name: Cache Deployments
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             deployments/*/.contracts
diff --git a/.github/workflows/run-semgrep.yaml b/.github/workflows/run-semgrep.yaml
index dad4eb51a..ec9237e4e 100644
--- a/.github/workflows/run-semgrep.yaml
+++ b/.github/workflows/run-semgrep.yaml
@@ -28,16 +28,16 @@ jobs:
 
     steps:
       # Fetch project source with GitHub Actions Checkout.
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Fetch generic rules
       - name: Fetch generic semgrep rules
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: decurity/semgrep-smart-contracts
           path: rules
       # Fetch Compound rules
       - name: Fetch Compound semgrep rules
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: decurity/compound-semgrep-rules
           path: compound
diff --git a/.github/workflows/run-slither.yaml b/.github/workflows/run-slither.yaml
index 3c80df49e..2ca5a871d 100644
--- a/.github/workflows/run-slither.yaml
+++ b/.github/workflows/run-slither.yaml
@@ -8,9 +8,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
diff --git a/.github/workflows/run-unit-tests.yaml b/.github/workflows/run-unit-tests.yaml
index 849ae43b8..49779a40f 100644
--- a/.github/workflows/run-unit-tests.yaml
+++ b/.github/workflows/run-unit-tests.yaml
@@ -16,9 +16,9 @@ jobs:
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 

From 91b09ebcfdbe96184de262c9fbe28393bacde647 Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Fri, 13 Sep 2024 16:28:06 +0300
Subject: [PATCH 05/12] fix: final fix to workflow

---
 .github/workflows/run-scenarios.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/run-scenarios.yaml b/.github/workflows/run-scenarios.yaml
index b651c8880..c2b7adcce 100644
--- a/.github/workflows/run-scenarios.yaml
+++ b/.github/workflows/run-scenarios.yaml
@@ -57,7 +57,7 @@ jobs:
       - uses: actions/upload-artifact@v4 # upload scenario results
         if: success() || failure() # run this step even if previous step failed
         with:
-          name: scenario-results
+          name: scenario-results-${{ matrix.bases }}
           path: scenario-results.json
 
       - uses: dorny/test-reporter@v1

From 51d804b5cbe09bdd9dace16780e40470d31f60a7 Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Fri, 13 Sep 2024 17:06:41 +0300
Subject: [PATCH 06/12] fix: relations

---
 deployments/optimism/weth/relations.ts | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/deployments/optimism/weth/relations.ts b/deployments/optimism/weth/relations.ts
index e88708f5d..45457356a 100644
--- a/deployments/optimism/weth/relations.ts
+++ b/deployments/optimism/weth/relations.ts
@@ -56,14 +56,4 @@ export default {
   WBTC: {
     artifact: 'contracts/ERC20.sol:ERC20'
   },
-  
-  // weETH
-  TransparentUpgradeableProxy: {
-    artifact: 'contracts/ERC20.sol:ERC20',
-    delegates: {
-      field: {
-        slot: '0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc'
-      }
-    }
-  },
 };

From 8e8749a7f13e72534b40e6506a68214ea2e9a48b Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Fri, 13 Sep 2024 17:51:53 +0300
Subject: [PATCH 07/12] update versions and fix one relation

---
 .github/workflows/deploy-market.yaml       |  6 +++---
 .github/workflows/enact-migration.yaml     |  6 +++---
 .github/workflows/prepare-migration.yaml   |  6 +++---
 .github/workflows/run-contract-linter.yaml |  4 ++--
 .github/workflows/run-coverage.yaml        |  4 ++--
 .github/workflows/run-eslint.yaml          |  4 ++--
 .github/workflows/run-forge-tests.yaml     |  2 +-
 .github/workflows/run-gas-profiler.yaml    |  4 ++--
 .github/workflows/run-scenarios.yaml       | 10 +++++-----
 .github/workflows/run-slither.yaml         |  4 ++--
 .github/workflows/run-unit-tests.yaml      |  6 +++---
 deployments/optimism/weth/relations.ts     | 10 ----------
 12 files changed, 28 insertions(+), 38 deletions(-)

diff --git a/.github/workflows/deploy-market.yaml b/.github/workflows/deploy-market.yaml
index 5de6eb684..fe6e35024 100644
--- a/.github/workflows/deploy-market.yaml
+++ b/.github/workflows/deploy-market.yaml
@@ -53,9 +53,9 @@ jobs:
         if: github.event.inputs.eth_pk == ''
 
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
@@ -77,7 +77,7 @@ jobs:
           NETWORK_PROVIDER: ${{ fromJSON('["", "http://localhost:8585"]')[github.event.inputs.eth_pk == ''] }}
           REMOTE_ACCOUNTS: ${{ fromJSON('["", "true"]')[github.event.inputs.eth_pk == ''] }}
 
-      - uses: actions/upload-artifact@v2 # upload test results
+      - uses: actions/upload-artifact@v4 # upload test results
         if: success() || failure() # run this step even if previous step failed
         with:
           name: ${{ github.event.inputs.network }}-${{ github.event.inputs.deployment }}-verify-args
diff --git a/.github/workflows/enact-migration.yaml b/.github/workflows/enact-migration.yaml
index f3a5e4524..cf1310a8f 100644
--- a/.github/workflows/enact-migration.yaml
+++ b/.github/workflows/enact-migration.yaml
@@ -85,9 +85,9 @@ jobs:
         if: github.event.inputs.eth_pk == '' && env.GOV_NETWORK != ''
 
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
@@ -100,7 +100,7 @@ jobs:
       - name: Check types
         run: yarn tsc
 
-      - uses: dawidd6/action-download-artifact@v2
+      - uses: dawidd6/action-download-artifact@v4
         with:
           workflow: prepare-migration.yml
           run_id: ${{ github.event.inputs.run_id }}
diff --git a/.github/workflows/prepare-migration.yaml b/.github/workflows/prepare-migration.yaml
index c27bc569e..9d6206a18 100644
--- a/.github/workflows/prepare-migration.yaml
+++ b/.github/workflows/prepare-migration.yaml
@@ -53,9 +53,9 @@ jobs:
         if: github.event.inputs.eth_pk == ''
 
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
@@ -77,7 +77,7 @@ jobs:
           NETWORK_PROVIDER: ${{ fromJSON('["", "http://localhost:8585"]')[github.event.inputs.eth_pk == ''] }}
           REMOTE_ACCOUNTS: ${{ fromJSON('["", "true"]')[github.event.inputs.eth_pk == ''] }}
 
-      - uses: actions/upload-artifact@v2 # upload test results
+      - uses: actions/upload-artifact@v4 # upload test results
         if: success() || failure() # run this step even if previous step failed
         with:
           name: ${{ github.event.inputs.network }}-${{ github.event.inputs.deployment }}-${{ github.event.inputs.migration }}
diff --git a/.github/workflows/run-contract-linter.yaml b/.github/workflows/run-contract-linter.yaml
index b027b58fb..2513cc18c 100644
--- a/.github/workflows/run-contract-linter.yaml
+++ b/.github/workflows/run-contract-linter.yaml
@@ -15,11 +15,11 @@ jobs:
       LINEASCAN_KEY: ${{ secrets.LINEASCAN_KEY }}
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
diff --git a/.github/workflows/run-coverage.yaml b/.github/workflows/run-coverage.yaml
index e2272a9d5..b28829b56 100644
--- a/.github/workflows/run-coverage.yaml
+++ b/.github/workflows/run-coverage.yaml
@@ -18,9 +18,9 @@ jobs:
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           cache: 'yarn'
           node-version: '16'
diff --git a/.github/workflows/run-eslint.yaml b/.github/workflows/run-eslint.yaml
index 9763d45d4..1961fec4c 100644
--- a/.github/workflows/run-eslint.yaml
+++ b/.github/workflows/run-eslint.yaml
@@ -16,9 +16,9 @@ jobs:
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           cache: 'yarn'
           node-version: '16'
diff --git a/.github/workflows/run-forge-tests.yaml b/.github/workflows/run-forge-tests.yaml
index 069a30bdb..6a10f7523 100644
--- a/.github/workflows/run-forge-tests.yaml
+++ b/.github/workflows/run-forge-tests.yaml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           submodules: recursive
 
diff --git a/.github/workflows/run-gas-profiler.yaml b/.github/workflows/run-gas-profiler.yaml
index d2418ad42..d49ba9152 100644
--- a/.github/workflows/run-gas-profiler.yaml
+++ b/.github/workflows/run-gas-profiler.yaml
@@ -17,9 +17,9 @@ jobs:
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
diff --git a/.github/workflows/run-scenarios.yaml b/.github/workflows/run-scenarios.yaml
index 0fecdd98c..c2b7adcce 100644
--- a/.github/workflows/run-scenarios.yaml
+++ b/.github/workflows/run-scenarios.yaml
@@ -22,17 +22,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           cache: 'yarn'
           node-version: '16'
 
       - name: Cache Deployments
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             deployments/*/.contracts
@@ -54,10 +54,10 @@ jobs:
       - name: Run scenarios
         run: yarn scenario --bases ${{ matrix.bases }}
 
-      - uses: actions/upload-artifact@v2 # upload scenario results
+      - uses: actions/upload-artifact@v4 # upload scenario results
         if: success() || failure() # run this step even if previous step failed
         with:
-          name: scenario-results
+          name: scenario-results-${{ matrix.bases }}
           path: scenario-results.json
 
       - uses: dorny/test-reporter@v1
diff --git a/.github/workflows/run-slither.yaml b/.github/workflows/run-slither.yaml
index 3c80df49e..2ca5a871d 100644
--- a/.github/workflows/run-slither.yaml
+++ b/.github/workflows/run-slither.yaml
@@ -8,9 +8,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
diff --git a/.github/workflows/run-unit-tests.yaml b/.github/workflows/run-unit-tests.yaml
index d198e156e..49779a40f 100644
--- a/.github/workflows/run-unit-tests.yaml
+++ b/.github/workflows/run-unit-tests.yaml
@@ -16,9 +16,9 @@ jobs:
       OPTIMISMSCAN_KEY: ${{ secrets.OPTIMISMSCAN_KEY }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: '16'
 
@@ -34,7 +34,7 @@ jobs:
       - name: Run tests
         run: yarn test
 
-      - uses: actions/upload-artifact@v2  # upload test results
+      - uses: actions/upload-artifact@v4  # upload test results
         if: success() || failure()        # run this step even if previous step failed
         with:
           name: test-results
diff --git a/deployments/optimism/weth/relations.ts b/deployments/optimism/weth/relations.ts
index e88708f5d..45457356a 100644
--- a/deployments/optimism/weth/relations.ts
+++ b/deployments/optimism/weth/relations.ts
@@ -56,14 +56,4 @@ export default {
   WBTC: {
     artifact: 'contracts/ERC20.sol:ERC20'
   },
-  
-  // weETH
-  TransparentUpgradeableProxy: {
-    artifact: 'contracts/ERC20.sol:ERC20',
-    delegates: {
-      field: {
-        slot: '0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc'
-      }
-    }
-  },
 };

From 279e0345ab8572e7a88dc718ec492794d310bd1f Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Thu, 26 Sep 2024 13:28:01 +0300
Subject: [PATCH 08/12] feat: contracts

---
 .../pricefeeds/METHExchangeRatePriceFeed.sol  | 99 +++++++++++++++++++
 contracts/vendor/mantle/IRateProvider.sol     |  6 ++
 2 files changed, 105 insertions(+)
 create mode 100644 contracts/pricefeeds/METHExchangeRatePriceFeed.sol
 create mode 100644 contracts/vendor/mantle/IRateProvider.sol

diff --git a/contracts/pricefeeds/METHExchangeRatePriceFeed.sol b/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
new file mode 100644
index 000000000..f8868ca9c
--- /dev/null
+++ b/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity 0.8.15;
+
+import "../vendor/mantle/IRateProvider.sol";
+import "../IPriceFeed.sol";
+
+/**
+ * @title mETH Scaling price feed
+ * @notice A custom price feed that scales up or down the price received from an underlying Renzo mETH / ETH exchange rate price feed and returns the result
+ * @author Compound
+ */
+contract METHExchangeRatePriceFeed is IPriceFeed {
+    /** Custom errors **/
+    error InvalidInt256();
+    error BadDecimals();
+
+    /// @notice Version of the price feed
+    uint public constant VERSION = 1;
+
+    /// @notice Description of the price feed
+    string public description;
+
+    /// @notice Number of decimals for returned prices
+    uint8 public immutable override decimals;
+
+    /// @notice mETH price feed where prices are fetched from
+    address public immutable underlyingPriceFeed;
+
+    /// @notice Whether or not the price should be upscaled
+    bool internal immutable shouldUpscale;
+
+    /// @notice The amount to upscale or downscale the price by
+    int256 internal immutable rescaleFactor;
+
+    /**
+     * @notice Construct a new mETH scaling price feed
+     * @param mETHRateProvider The address of the underlying price feed to fetch prices from
+     * @param decimals_ The number of decimals for the returned prices
+     **/
+    constructor(address mETHRateProvider, uint8 decimals_, string memory description_) {
+        underlyingPriceFeed = mETHRateProvider;
+        if (decimals_ > 18) revert BadDecimals();
+        decimals = decimals_;
+        description = description_;
+
+        uint8 mETHRateProviderDecimals = 18;
+        // Note: Solidity does not allow setting immutables in if/else statements
+        shouldUpscale = mETHRateProviderDecimals < decimals_ ? true : false;
+        rescaleFactor = (shouldUpscale
+            ? signed256(10 ** (decimals_ - mETHRateProviderDecimals))
+            : signed256(10 ** (mETHRateProviderDecimals - decimals_))
+        );
+    }
+
+    /**
+     * @notice Price for the latest round
+     * @return roundId Round id from the underlying price feed
+     * @return answer Latest price for the asset in terms of ETH
+     * @return startedAt Timestamp when the round was started; passed on from underlying price feed
+     * @return updatedAt Timestamp when the round was last updated; passed on from underlying price feed
+     * @return answeredInRound Round id in which the answer was computed; passed on from underlying price feed
+     **/
+    function latestRoundData() override external view returns (
+        uint80 roundId,
+        int256 answer,
+        uint256 startedAt,
+        uint256 updatedAt,
+        uint80 answeredInRound
+    ) {
+        // https://etherscan.io/address/0xe3cBd06D7dadB3F4e6557bAb7EdD924CD1489E8f#readProxyContract#F19
+        // rate = 1 mETH in ETH
+        uint256 rate = IRateProvider(underlyingPriceFeed).mETHToETH(1e18);
+        // protocol uses only the answer value. Other data fields are not provided by the underlying pricefeed and are not used in Comet protocol
+        return (1, scalePrice(signed256(rate)), block.timestamp, block.timestamp, 1);
+    }
+
+    function signed256(uint256 n) internal pure returns (int256) {
+        if (n > uint256(type(int256).max)) revert InvalidInt256();
+        return int256(n);
+    }
+
+    function scalePrice(int256 price) internal view returns (int256) {
+        int256 scaledPrice;
+        if (shouldUpscale) {
+            scaledPrice = price * rescaleFactor;
+        } else {
+            scaledPrice = price / rescaleFactor;
+        }
+        return scaledPrice;
+    }
+
+    /**
+     * @notice Price for the latest round
+     * @return The version of the price feed contract
+     **/
+    function version() external pure returns (uint256) {
+        return VERSION;
+    }
+}
diff --git a/contracts/vendor/mantle/IRateProvider.sol b/contracts/vendor/mantle/IRateProvider.sol
new file mode 100644
index 000000000..d6e994837
--- /dev/null
+++ b/contracts/vendor/mantle/IRateProvider.sol
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity 0.8.15;
+
+interface IRateProvider {
+    function mETHToETH(uint256) external view returns (uint256);
+} 

From 3cff00db694b92dfe34cf68a35baa854288cbde3 Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Tue, 12 Nov 2024 17:17:14 +0200
Subject: [PATCH 09/12] fix: audit

---
 contracts/pricefeeds/METHExchangeRatePriceFeed.sol | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/contracts/pricefeeds/METHExchangeRatePriceFeed.sol b/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
index f8868ca9c..61b264aff 100644
--- a/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
+++ b/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
@@ -15,7 +15,7 @@ contract METHExchangeRatePriceFeed is IPriceFeed {
     error BadDecimals();
 
     /// @notice Version of the price feed
-    uint public constant VERSION = 1;
+    uint internal constant VERSION = 1;
 
     /// @notice Description of the price feed
     string public description;
@@ -67,7 +67,6 @@ contract METHExchangeRatePriceFeed is IPriceFeed {
         uint256 updatedAt,
         uint80 answeredInRound
     ) {
-        // https://etherscan.io/address/0xe3cBd06D7dadB3F4e6557bAb7EdD924CD1489E8f#readProxyContract#F19
         // rate = 1 mETH in ETH
         uint256 rate = IRateProvider(underlyingPriceFeed).mETHToETH(1e18);
         // protocol uses only the answer value. Other data fields are not provided by the underlying pricefeed and are not used in Comet protocol
@@ -90,7 +89,7 @@ contract METHExchangeRatePriceFeed is IPriceFeed {
     }
 
     /**
-     * @notice Price for the latest round
+     * @notice Get the version of the price feed contract
      * @return The version of the price feed contract
      **/
     function version() external pure returns (uint256) {

From 4d8684f5e282485e15ba2d37dd246bb0291d717e Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Tue, 12 Nov 2024 18:13:53 +0200
Subject: [PATCH 10/12] fix: update

---
 deployments/mainnet/usdt/relations.ts | 8 ++++++++
 deployments/relations.ts              | 9 ++++++++-
 scenario/SupplyScenario.ts            | 2 +-
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/deployments/mainnet/usdt/relations.ts b/deployments/mainnet/usdt/relations.ts
index 59fabbc80..a695b4b3a 100644
--- a/deployments/mainnet/usdt/relations.ts
+++ b/deployments/mainnet/usdt/relations.ts
@@ -21,6 +21,14 @@ export default {
     artifact: 'contracts/ERC20.sol:ERC20',
   },
   'TransparentUpgradeableProxy': {
+    artifact: 'contracts/ERC20.sol:ERC20',
+    delegates: {
+      field: {
+        slot: '0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc'
+      }
+    },
+  },
+  'ERC1967Proxy': {
     artifact: 'contracts/ERC20.sol:ERC20',
     delegates: {
       field: {
diff --git a/deployments/relations.ts b/deployments/relations.ts
index f0ea7c6ca..de0b1d381 100644
--- a/deployments/relations.ts
+++ b/deployments/relations.ts
@@ -31,7 +31,14 @@ const relationConfigMap: RelationConfigMap = {
             })
           );
         },
-        alias: async (token) => token.symbol(),
+        alias: async (token) =>{
+          try {
+            return token.symbol();
+          } 
+          catch (e) {
+            throw new Error(`failed to get symbol for token ${token.address} with error: ${e}`);
+          }
+        },
       },
       assetPriceFeeds: {
         field: async (comet) => {
diff --git a/scenario/SupplyScenario.ts b/scenario/SupplyScenario.ts
index 7082f87a6..a1b012390 100644
--- a/scenario/SupplyScenario.ts
+++ b/scenario/SupplyScenario.ts
@@ -300,7 +300,7 @@ scenario(
     const utilization = await comet.getUtilization();
     const borrowRate = (await comet.getBorrowRate(utilization)).toBigInt();
 
-    expectApproximately(await albert.getCometBaseBalance(), -999n * scale, getInterest(999n * scale, borrowRate, 1n) + 2n);
+    expectApproximately(await albert.getCometBaseBalance(), -999n * scale, getInterest(999n * scale, borrowRate, 4n) + 2n);
 
     // Albert repays 1000 units of base borrow
     await baseAsset.approve(albert, comet.address);

From 05bc49c0d8a8aa687536752016835683a777e3d0 Mon Sep 17 00:00:00 2001
From: Mikhailo Shabodyash <misha.sh@woof.software>
Date: Wed, 13 Nov 2024 10:51:02 +0200
Subject: [PATCH 11/12] fix: comment fix

---
 contracts/pricefeeds/METHExchangeRatePriceFeed.sol | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/contracts/pricefeeds/METHExchangeRatePriceFeed.sol b/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
index 61b264aff..b97f475d6 100644
--- a/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
+++ b/contracts/pricefeeds/METHExchangeRatePriceFeed.sol
@@ -6,7 +6,7 @@ import "../IPriceFeed.sol";
 
 /**
  * @title mETH Scaling price feed
- * @notice A custom price feed that scales up or down the price received from an underlying Renzo mETH / ETH exchange rate price feed and returns the result
+ * @notice A custom price feed that scales up or down the price received from an underlying Mantle mETH / ETH exchange rate price feed and returns the result
  * @author Compound
  */
 contract METHExchangeRatePriceFeed is IPriceFeed {

From 5c21c7f5808b7f2c42840fb33381b4d35107f503 Mon Sep 17 00:00:00 2001
From: Dmitriy Babenko
 <159453675+dmitriy-woof-software@users.noreply.github.com>
Date: Tue, 26 Nov 2024 13:33:55 -0600
Subject: [PATCH 12/12] Update 1726138937_add_meth_collateral.ts

---
 .../usdt/migrations/1726138937_add_meth_collateral.ts     | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts b/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts
index 692359fe6..46f449f36 100644
--- a/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts
+++ b/deployments/mainnet/usdt/migrations/1726138937_add_meth_collateral.ts
@@ -16,7 +16,8 @@ export default migration('1726138937_add_meth_collateral', {
         METH_EXCHANGE_RATE_PROVIDER_ADDRESS, // mETH / ETH price feed
         8,                                   // decimals
         'mETH/ETH exchange rate',            // description
-      ]
+      ],
+      true
     );
     const ethToUSDPriceFeed = await deploymentManager.fromDep('WETH:priceFeed', 'mainnet', 'usdt');
 
@@ -27,8 +28,9 @@ export default migration('1726138937_add_meth_collateral', {
         _mETHToETHPriceFeed.address,  // mETH / ETH price feed
         ethToUSDPriceFeed.address,    // ETH / USD price feed
         8,                            // decimals
-        'wstETH / ETH price feed'     // description
-      ]
+        'mETH / USD price feed'     // description
+      ],
+      true
     );
     return { mETHPriceFeedAddress: _mETHPriceFeed.address };
   },