Add weth IR update with ACI

diffs/preTestEthereumUpdate20231024_postTestEthereumUpdate20231024.md

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+## Reserve changes
+
+### Reserves altered
+
+#### WETH ([0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2](https://etherscan.io/address/0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2))
+
+| description | value before | value after |
+| --- | --- | --- |
+| interestRateStrategy | [0xb02381b1d27aA9845e5012083CA288c1818884f0](https://etherscan.io/address/0xb02381b1d27aA9845e5012083CA288c1818884f0) | [0xA901Bf68Bebde17ba382e499C3e9EbAe649DF276](https://etherscan.io/address/0xA901Bf68Bebde17ba382e499C3e9EbAe649DF276) |
+| optimalUsageRatio | 90 % | 80 % |
+| maxExcessUsageRatio | 10 % | 20 % |
+| variableRateSlope1 | 3.8 % | 2.8 % |
+| baseStableBorrowRate | 6.8 % | 5.8 % |
+| interestRate | ![before](/.assets/36935a8fd1d50a51974d60fcb6323e9bc9a95c16.svg) | ![after](/.assets/cf503516adca0ef2b3e859f702e54d27d132edf2.svg) |
+
+## Raw diff
+
+```json
+{
+  "reserves": {
+    "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2": {
+      "interestRateStrategy": {
+        "from": "0xb02381b1d27aA9845e5012083CA288c1818884f0",
+        "to": "0xA901Bf68Bebde17ba382e499C3e9EbAe649DF276"
+      }
+    }
+  },
+  "strategies": {
+    "0xA901Bf68Bebde17ba382e499C3e9EbAe649DF276": {
+      "from": null,
+      "to": {
+        "baseStableBorrowRate": "58000000000000000000000000",
+        "baseVariableBorrowRate": 0,
+        "maxExcessStableToTotalDebtRatio": "800000000000000000000000000",
+        "maxExcessUsageRatio": "200000000000000000000000000",
+        "optimalStableToTotalDebtRatio": "200000000000000000000000000",
+        "optimalUsageRatio": "800000000000000000000000000",
+        "stableRateSlope1": "40000000000000000000000000",
+        "stableRateSlope2": "800000000000000000000000000",
+        "variableRateSlope1": "28000000000000000000000000",
+        "variableRateSlope2": "800000000000000000000000000"
+      }
+    }
+  }
+}
+```

src/AaveV3Update_20231024/AaveV3Ethereum_20231024.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {IEngine,EngineFlags,Rates} from 'aave-helpers/v3-config-engine/AaveV3PayloadBase.sol';
+import {
+  AaveV3PayloadEthereum,
+  AaveV3EthereumAssets
+} from 'aave-helpers/v3-config-engine/AaveV3PayloadEthereum.sol';
+
+/**
+  * @title Upgrade Aave V3 ETH pool wETH parameters
+  * @author Gauntlet, ACI
+  * - Discussion: https://governance.aave.com/t/arfc-upgrade-aave-v3-eth-pool-weth-parameters/15110
+ */
+contract AaveV3EthereumUpdate20231024Payload is AaveV3PayloadEthereum {
+  function rateStrategiesUpdates() public pure override returns (IEngine.RateStrategyUpdate[] memory) {
+    IEngine.RateStrategyUpdate[] memory rateStrategyUpdates = new IEngine.RateStrategyUpdate[](1);
+
+    Rates.RateStrategyParams memory paramsWETH_UNDERLYING = Rates.RateStrategyParams({
+      optimalUsageRatio: _bpsToRay(8000),
+      baseVariableBorrowRate: EngineFlags.KEEP_CURRENT,
+      variableRateSlope1: _bpsToRay(280),
+      variableRateSlope2: EngineFlags.KEEP_CURRENT,
+      stableRateSlope1: EngineFlags.KEEP_CURRENT,
+      stableRateSlope2: EngineFlags.KEEP_CURRENT,
+      baseStableRateOffset: EngineFlags.KEEP_CURRENT,
+      stableRateExcessOffset: EngineFlags.KEEP_CURRENT,
+      optimalStableToTotalDebtRatio: EngineFlags.KEEP_CURRENT
+    });
+
+    rateStrategyUpdates[0] = IEngine.RateStrategyUpdate({
+      asset: AaveV3EthereumAssets.WETH_UNDERLYING,
+      params: paramsWETH_UNDERLYING
+    });
+
+    return rateStrategyUpdates;
+  }
+}

src/AaveV3Update_20231024/AaveV3Update_20231024.md

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+---
+title: Upgrade Aave V3 ETH pool wETH parameters
+author: Gauntlet, ACI
+discussions: https://governance.aave.com/t/arfc-upgrade-aave-v3-eth-pool-weth-parameters/15110
+---
+
+## Summary
+
+The current yields of stETH and reth are 3.30% and 3.07% respectively. By adjusting the slope1 parameter of WETH, we aim to:
+
+- Enhance Profitability in Leverage Loops: The proposed adjustment will make leverage loops more profitable for users.
+- Align with stETH and reth Yields: The proposed adjustment aims to set the slope1 slightly below the current yields of stETH and reth, ensuring Aave remains competitive.
+
+Increased utilization of ETH reserve is expected to partly compensate for the slight loss of protocol revenue due to lower interest rate equilibrium.
+
+## Specification
+
+| Chain       | Asset | Current Uopt | Recommended Uopt | Current Variable Slope 1 | Recommended Variable Slope 1 |
+| ----------- | ----- | ------------ | ---------------- | ------------------------ | ---------------------------- |
+| Ethereum v3 | WETH  | 90%          | 80%              | 3.8%                     | 2.8%                         |
+
+## Implementation
+
+The proposal implements changes using the following payload:
+
+- [Ethereum](https://github.com/bgd-labs/aave-proposals/blob/main/src/AaveV3Update_20231024/AaveV3Ethereum_20231024.sol)
+
+## References
+
+- **Discussion**: https://governance.aave.com/t/arfc-upgrade-aave-v3-eth-pool-weth-parameters/15110
+
+## Disclaimer
+
+Gauntlet and ACI have not received any compensation from any third-party in exchange for recommending any of the actions contained in this proposal.
+
+By approving this proposal, you agree that any services provided by Gauntlet shall be governed by the terms of service available at gauntlet.network/tos.
+
+## Copyright
+
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).
+
+_By approving this proposal, you agree that any services provided by Gauntlet shall be governed by the terms of service available at gauntlet.network/tos._

src/AaveV3Update_20231024/AaveV3Update_20231024_Test.t.sol

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+
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import 'forge-std/Test.sol';
+import {AaveGovernanceV2} from 'aave-address-book/AaveGovernanceV2.sol';
+import {ProtocolV3TestBase, ReserveConfig} from 'aave-helpers/ProtocolV3TestBase.sol';
+import {GovHelpers} from 'aave-helpers/GovHelpers.sol';
+import {
+  AaveV3Ethereum,
+  AaveV3EthereumAssets
+} from 'aave-helpers/v3-config-engine/AaveV3PayloadEthereum.sol';
+import {
+  AaveV3EthereumUpdate20231024Payload
+} from './AaveV3Ethereum_20231024.sol';
+
+contract AaveV3EthereumUpdate_20231024_Test is ProtocolV3TestBase {
+  function setUp() public {
+    vm.createSelectFork(vm.rpcUrl('mainnet'), 18422833);
+  }
+
+  function testEthereum20231024UpdatePayload() public {
+    ReserveConfig[] memory allConfigsBefore = createConfigurationSnapshot(
+      'preTestEthereumUpdate20231024',
+      AaveV3Ethereum.POOL
+    );
+
+    ReserveConfig memory WETH_UNDERLYINGBefore = _findReserveConfig(
+      allConfigsBefore,
+      AaveV3EthereumAssets.WETH_UNDERLYING
+    );
+
+    GovHelpers.executePayload(
+      vm,
+      address(new AaveV3EthereumUpdate20231024Payload()),
+      AaveGovernanceV2.SHORT_EXECUTOR
+    );
+
+    ReserveConfig[] memory allConfigsAfter = createConfigurationSnapshot(
+      'postTestEthereumUpdate20231024',
+      AaveV3Ethereum.POOL
+    );
+
+    diffReports('preTestEthereumUpdate20231024', 'postTestEthereumUpdate20231024');
+
+    address[] memory assetsChanged = new address[](1);
+    assetsChanged[0] = AaveV3EthereumAssets.WETH_UNDERLYING;
+
+    _noReservesConfigsChangesApartFrom(allConfigsBefore, allConfigsAfter, assetsChanged);
+
+    {
+      ReserveConfig memory WETH_UNDERLYINGAfter = _findReserveConfig(
+        allConfigsAfter,
+        AaveV3EthereumAssets.WETH_UNDERLYING
+      );
+      WETH_UNDERLYINGBefore.interestRateStrategy = WETH_UNDERLYINGAfter.interestRateStrategy;
+      _validateReserveConfig(WETH_UNDERLYINGBefore, allConfigsAfter);
+    }
+    e2eTest(AaveV3Ethereum.POOL);
+  }
+}

src/AaveV3Update_20231024/DeployAaveV3Update_20231024.s.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {GovHelpers} from 'aave-helpers/GovHelpers.sol';
+import {
+  EthereumScript
+} from 'aave-helpers/ScriptUtils.sol';
+import {
+  AaveV3EthereumUpdate20231024Payload
+} from './AaveV3Ethereum_20231024.sol';
+
+contract CreateProposal is EthereumScript {
+  function run() external broadcast {
+    GovHelpers.Payload[] memory payloads = new GovHelpers.Payload[](1);
+    payloads[0] = GovHelpers.buildMainnet(address(0));
+    GovHelpers.createProposal(
+      payloads,
+      GovHelpers.ipfsHashFile(
+        vm,
+        'src/AaveV3Update_20231024/AaveV3Update_20231024.md'
+      )
+    );
+  }
+}
+
+contract Deploy20231024PayloadEthereum is EthereumScript {
+  function run() external broadcast {
+    new AaveV3EthereumUpdate20231024Payload();
+  }
+}