Adjust Risk parameters for Aave Polygon V3 - Review

diffs/AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228_before_AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228_after.md

@@ -0,0 +1,153 @@
+## Reserve changes
+
+### Reserve altered
+
+#### USDC ([0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359](https://polygonscan.com/address/0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359))
+
+| description | value before | value after |
+| --- | --- | --- |
+| ltv | 0 % [0] | 70 % [7000] |
+
+
+#### USDT ([0xc2132D05D31c914a87C6611C10748AEb04B58e8F](https://polygonscan.com/address/0xc2132D05D31c914a87C6611C10748AEb04B58e8F))
+
+| description | value before | value after |
+| --- | --- | --- |
+| ltv | 0 % [0] | 70 % [7000] |
+
+
+## Emodes changed
+
+### EMode: Stablecoins(id: 1)
+
+| description | value before | value after |
+| --- | --- | --- |
+| eMode.label (unchanged) | Stablecoins | Stablecoins |
+| eMode.ltv | 93 % | 91.25 % |
+| eMode.liquidationThreshold | 95 % | 94.25 % |
+| eMode.liquidationBonus (unchanged) | 1 % | 1 % |
+| eMode.borrowableBitmap | DAI, USDC, USDT, EURS, jEUR, EURA, miMATIC, USDC |  |
+| eMode.collateralBitmap (unchanged) | DAI, USDC, USDT, EURS, jEUR, EURA, miMATIC, USDC | DAI, USDC, USDT, EURS, jEUR, EURA, miMATIC, USDC |
+
+
+### EMode: MATIC correlated(id: 2)
+
+
+
+### EMode: ETH correlated(id: 3)
+
+
+
+## Raw diff
+
+```json
+{
+  "eModes": {
+    "1": {
+      "borrowableBitmap": {
+        "from": "1171493",
+        "to": "0"
+      },
+      "liquidationThreshold": {
+        "from": 9500,
+        "to": 9425
+      },
+      "ltv": {
+        "from": 9300,
+        "to": 9125
+      }
+    }
+  },
+  "reserves": {
+    "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359": {
+      "ltv": {
+        "from": 0,
+        "to": 7000
+      }
+    },
+    "0xc2132D05D31c914a87C6611C10748AEb04B58e8F": {
+      "ltv": {
+        "from": 0,
+        "to": 7000
+      }
+    }
+  },
+  "raw": {
+    "0x401b5d0294e23637c18fcc38b1bca814cda2637c": {
+      "label": "GovernanceV3Polygon.PAYLOADS_CONTROLLER",
+      "balanceDiff": null,
+      "stateDiff": {}
+    },
+    "0x794a61358d6845594f94dc1db02a252b5b4814ad": {
+      "label": "AaveV3Polygon.POOL",
+      "balanceDiff": null,
+      "stateDiff": {}
+    },
+    "0x8145edddf43f50276641b55bd3ad95944510021e": {
+      "label": "AaveV3Polygon.POOL_CONFIGURATOR",
+      "balanceDiff": null,
+      "stateDiff": {}
+    },
+    "0xa72636cbcaa8f5ff95b2cc47f3cdee83f3294a0b": {
+      "label": "AaveV3Polygon.ACL_MANAGER",
+      "balanceDiff": null,
+      "stateDiff": {}
+    },
+    "0xa97684ead0e402dc232d5a977953df7ecbab3cdb": {
+      "label": "AaveV3Polygon.POOL_ADDRESSES_PROVIDER",
+      "balanceDiff": null,
+      "stateDiff": {}
+    },
+    "0xb7467b66d86ce80cc258f28d266a18a51db7fac8": {
+      "label": "AaveV3Polygon.POOL_IMPL",
+      "balanceDiff": null,
+      "stateDiff": {
+        "0x436c14203ee76e79d5652d508249351bf2aad2332f57381e04c70b85c9582d7c": {
+          "previousValue": "0x100000000000000000000103e8005f5e1000055d4a8007d0850629041e780000",
+          "newValue": "0x100000000000000000000103e8005f5e1000055d4a8007d0850629041e781b58"
+        },
+        "0x7bdd64832954533ce1bb06477375d759a0b8390bd9a186c07915b18bf5315b0c": {
+          "previousValue": "0x100000000000000000000103e80055d4a8000510ff4009c4a50629041e780000",
+          "newValue": "0x100000000000000000000103e80055d4a8000510ff4009c4a50629041e781b58"
+        },
+        "0x8e0cc0f1f0504b4cb44a23b328568106915b169e79003737a7b094503cdbeeb0": {
+          "previousValue": "0x000000000000000000000000000000000000000000000011e0252774251c2454",
+          "newValue": "0x000000000000000000000000000000000000000000000011e025277424d123a5"
+        },
+        "0x8e0cc0f1f0504b4cb44a23b328568106915b169e79003737a7b094503cdbeeb1": {
+          "previousValue": "0x537461626c65636f696e73000000000000000000000000000000000000000016",
+          "newValue": "0x537461626c65636f696e73000000000000000000000000000000000000000016"
+        },
+        "0x8e0cc0f1f0504b4cb44a23b328568106915b169e79003737a7b094503cdbeeb2": {
+          "previousValue": "0x000000000000000000000000000000000000000000000000000000000011e025",
+          "newValue": "0x0000000000000000000000000000000000000000000000000000000000000000"
+        }
+      }
+    },
+    "0xb962dcd6d9f0bfb4cb2936c6c5e5c7c3f0d3c778": {
+      "label": null,
+      "balanceDiff": null,
+      "stateDiff": {
+        "0xeaaacae94bbfc90c56bc9f09c078e38d09be79409287043ed56adc78213c2109": {
+          "previousValue": "0x0067c229a8000000000002000000000000000000000000000000000000000000",
+          "newValue": "0x0067c229a8000000000003000000000000000000000000000000000000000000"
+        },
+        "0xeaaacae94bbfc90c56bc9f09c078e38d09be79409287043ed56adc78213c210a": {
+          "previousValue": "0x000000000000000000093a8000000000000067f04e2900000000000000000000",
+          "newValue": "0x000000000000000000093a8000000000000067f04e2900000000000067c229a9"
+        }
+      }
+    },
+    "0xdf7d0e6454db638881302729f5ba99936eaab233": {
+      "label": "AaveV2Polygon.POOL_ADMIN, AaveV3Polygon.ACL_ADMIN, GovernanceV3Polygon.EXECUTOR_LVL_1",
+      "balanceDiff": null,
+      "stateDiff": {}
+    },
+    "0xe5e48ad1f9d1a894188b483dcf91f4fad6aba43b": {
+      "label": "AaveV3Polygon.POOL_CONFIGURATOR_IMPL",
+      "balanceDiff": null,
+      "stateDiff": {}
+    }
+  }
+}
+```

src/20250228_AaveV3Polygon_AdjustAavePolygonV3RiskParameters/AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228.sol

@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {AaveV3PolygonAssets, AaveV3PolygonEModes} from 'aave-address-book/AaveV3Polygon.sol';
+import {AaveV3PayloadPolygon} from 'aave-helpers/src/v3-config-engine/AaveV3PayloadPolygon.sol';
+import {EngineFlags} from 'aave-v3-origin/contracts/extensions/v3-config-engine/EngineFlags.sol';
+import {IAaveV3ConfigEngine} from 'aave-v3-origin/contracts/extensions/v3-config-engine/IAaveV3ConfigEngine.sol';
+/**
+ * @title Adjust Aave Polygon V3 Risk Parameters
+ * @author ACI
+ * - Snapshot: Direct-to-AIP
+ * - Discussion: https://governance.aave.com/t/arfc-adjust-risk-parameters-for-aave-v2-and-v3-on-polygon/20211/60
+ */
+contract AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228 is AaveV3PayloadPolygon {
+  function collateralsUpdates()
+    public
+    pure
+    override
+    returns (IAaveV3ConfigEngine.CollateralUpdate[] memory)
+  {
+    IAaveV3ConfigEngine.CollateralUpdate[]
+      memory collateralUpdate = new IAaveV3ConfigEngine.CollateralUpdate[](2);
+
+    collateralUpdate[0] = IAaveV3ConfigEngine.CollateralUpdate({
+      asset: AaveV3PolygonAssets.USDT_UNDERLYING,
+      ltv: 70_00,
+      liqThreshold: EngineFlags.KEEP_CURRENT,
+      liqBonus: EngineFlags.KEEP_CURRENT,
+      debtCeiling: EngineFlags.KEEP_CURRENT,
+      liqProtocolFee: EngineFlags.KEEP_CURRENT
+    });
+    collateralUpdate[1] = IAaveV3ConfigEngine.CollateralUpdate({
+      asset: AaveV3PolygonAssets.USDCn_UNDERLYING,
+      ltv: 70_00,
+      liqThreshold: EngineFlags.KEEP_CURRENT,
+      liqBonus: EngineFlags.KEEP_CURRENT,
+      debtCeiling: EngineFlags.KEEP_CURRENT,
+      liqProtocolFee: EngineFlags.KEEP_CURRENT
+    });
+
+    return collateralUpdate;
+  }
+  function eModeCategoriesUpdates()
+    public
+    pure
+    override
+    returns (IAaveV3ConfigEngine.EModeCategoryUpdate[] memory)
+  {
+    IAaveV3ConfigEngine.EModeCategoryUpdate[]
+      memory eModeUpdates = new IAaveV3ConfigEngine.EModeCategoryUpdate[](1);
+
+    eModeUpdates[0] = IAaveV3ConfigEngine.EModeCategoryUpdate({
+      eModeCategory: AaveV3PolygonEModes.STABLECOINS,
+      ltv: 91_25,
+      liqThreshold: 94_25,
+      liqBonus: EngineFlags.KEEP_CURRENT,
+      label: EngineFlags.KEEP_CURRENT_STRING
+    });
+
+    return eModeUpdates;
+  }
+  function assetsEModeUpdates()
+    public
+    pure
+    override
+    returns (IAaveV3ConfigEngine.AssetEModeUpdate[] memory)
+  {
+    IAaveV3ConfigEngine.AssetEModeUpdate[]
+      memory assetEModeUpdates = new IAaveV3ConfigEngine.AssetEModeUpdate[](8);
+
+    assetEModeUpdates[0] = IAaveV3ConfigEngine.AssetEModeUpdate({
+      asset: AaveV3PolygonAssets.DAI_UNDERLYING,
+      eModeCategory: AaveV3PolygonEModes.STABLECOINS,
+      borrowable: EngineFlags.DISABLED,
+      collateral: EngineFlags.KEEP_CURRENT
+    });
+    assetEModeUpdates[1] = IAaveV3ConfigEngine.AssetEModeUpdate({
+      asset: AaveV3PolygonAssets.USDC_UNDERLYING,
+      eModeCategory: AaveV3PolygonEModes.STABLECOINS,
+      borrowable: EngineFlags.DISABLED,
+      collateral: EngineFlags.KEEP_CURRENT
+    });
+    assetEModeUpdates[2] = IAaveV3ConfigEngine.AssetEModeUpdate({
+      asset: AaveV3PolygonAssets.USDT_UNDERLYING,
+      eModeCategory: AaveV3PolygonEModes.STABLECOINS,
+      borrowable: EngineFlags.DISABLED,
+      collateral: EngineFlags.KEEP_CURRENT
+    });
+    assetEModeUpdates[3] = IAaveV3ConfigEngine.AssetEModeUpdate({
+      asset: AaveV3PolygonAssets.EURS_UNDERLYING,
+      eModeCategory: AaveV3PolygonEModes.STABLECOINS,
+      borrowable: EngineFlags.DISABLED,
+      collateral: EngineFlags.KEEP_CURRENT
+    });
+    assetEModeUpdates[4] = IAaveV3ConfigEngine.AssetEModeUpdate({
+      asset: AaveV3PolygonAssets.jEUR_UNDERLYING,
+      eModeCategory: AaveV3PolygonEModes.STABLECOINS,
+      borrowable: EngineFlags.DISABLED,
+      collateral: EngineFlags.KEEP_CURRENT
+    });
+    assetEModeUpdates[5] = IAaveV3ConfigEngine.AssetEModeUpdate({
+      asset: AaveV3PolygonAssets.EURA_UNDERLYING,
+      eModeCategory: AaveV3PolygonEModes.STABLECOINS,
+      borrowable: EngineFlags.DISABLED,
+      collateral: EngineFlags.KEEP_CURRENT
+    });
+    assetEModeUpdates[6] = IAaveV3ConfigEngine.AssetEModeUpdate({
+      asset: AaveV3PolygonAssets.miMATIC_UNDERLYING,
+      eModeCategory: AaveV3PolygonEModes.STABLECOINS,
+      borrowable: EngineFlags.DISABLED,
+      collateral: EngineFlags.KEEP_CURRENT
+    });
+    assetEModeUpdates[7] = IAaveV3ConfigEngine.AssetEModeUpdate({
+      asset: AaveV3PolygonAssets.USDCn_UNDERLYING,
+      eModeCategory: AaveV3PolygonEModes.STABLECOINS,
+      borrowable: EngineFlags.DISABLED,
+      collateral: EngineFlags.KEEP_CURRENT
+    });
+
+    return assetEModeUpdates;
+  }
+}

src/20250228_AaveV3Polygon_AdjustAavePolygonV3RiskParameters/AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228.t.sol

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {AaveV3Polygon} from 'aave-address-book/AaveV3Polygon.sol';
+
+import 'forge-std/Test.sol';
+import {ProtocolV3TestBase, ReserveConfig} from 'aave-helpers/src/ProtocolV3TestBase.sol';
+import {AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228} from './AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228.sol';
+
+/**
+ * @dev Test for AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228
+ * command: FOUNDRY_PROFILE=polygon forge test --match-path=src/20250228_AaveV3Polygon_AdjustAavePolygonV3RiskParameters/AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228.t.sol -vv
+ */
+contract AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228_Test is ProtocolV3TestBase {
+  AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228 internal proposal;
+
+  function setUp() public {
+    vm.createSelectFork(vm.rpcUrl('polygon'), 68490896);
+    proposal = new AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228();
+  }
+
+  /**
+   * @dev executes the generic test suite including e2e and config snapshots
+   */
+  function test_defaultProposalExecution() public {
+    defaultTest(
+      'AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228',
+      AaveV3Polygon.POOL,
+      address(proposal)
+    );
+  }
+}

src/20250228_AaveV3Polygon_AdjustAavePolygonV3RiskParameters/AdjustAavePolygonV3RiskParameters.md

@@ -0,0 +1,45 @@
+---
+title: "Adjust Aave Polygon V3 Risk Parameters"
+author: "ACI"
+discussions: "https://governance.aave.com/t/arfc-adjust-risk-parameters-for-aave-v2-and-v3-on-polygon/20211/60"
+---
+
+## Simple Summary
+
+This proposal addendum seeks governance approval for adjustment of the [AIP-254](https://vote.onaave.com/proposal/?proposalId=254&ipfsHash=0x9a0342bc6f37687ea20210c3a1664de1949d9e3e967ff87467501d4d00116aab) to reintroduce LTV for non-bridged stablecoins in Aave Polygon V3.
+
+## Motivation
+
+Based on service provider and community feedback, this proposal aims to adjust AIP-254 to reintroduce LTV for non-bridged stablecoins in Aave Polygon V3, as they carry no rehypothecation risk. It also reduces stablecoin E-mode LT in Aave Polygon V3 due to insufficient stablecoin/stablecoin trading volume to justify the current risk level.
+
+USDT is scheduled to migrate to the USDT0 standard soon, as recently implemented on networks like Arbitrum. To promote stablecoin diversity and taking an optimistic view on the reduction of bridge risk for this asset, this proposal aims to restore an LTV for USDT.
+
+## Specification
+
+Aave Polygon V3 stablecoins suggested risk parameters
+
+| Deployment | Asset | Current LTV | Proposed LTV |
+| ---------- | ----- | ----------- | ------------ |
+| Polygon V3 | USDT  | 0%          | 70%          |
+| Polygon V3 | USDC  | 0%          | 70%          |
+
+---
+
+Aave Polygon Stablecoin E-mode
+
+- Make all stablecoins non-borrowable in the stablecoin E-mode category
+
+| Current LTV | Proposed LTV | Current LT | Proposed LT |
+| ----------- | ------------ | ---------- | ----------- |
+| 93%         | 91.25%       | 95%        | 94.25%      |
+
+## References
+
+- Implementation: [AaveV3Polygon](https://github.com/bgd-labs/aave-proposals-v3/blob/main/src/20250228_AaveV3Polygon_AdjustAavePolygonV3RiskParameters/AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228.sol)
+- Tests: [AaveV3Polygon](https://github.com/bgd-labs/aave-proposals-v3/blob/main/src/20250228_AaveV3Polygon_AdjustAavePolygonV3RiskParameters/AaveV3Polygon_AdjustAavePolygonV3RiskParameters_20250228.t.sol)
+- Snapshot: Direct-to-AIP
+- [Discussion](https://governance.aave.com/t/arfc-adjust-risk-parameters-for-aave-v2-and-v3-on-polygon/20211/60)
+
+## Copyright
+
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).