feat: 3.2.0 activation (#466)

Co-authored-by: Harsh Pandey <[email protected]>

Author: sakulstra

diffs/AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924_before_AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924_after.md

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+## Raw diff
+
+```json
+{}
+```

src/20240924_Multi_UpgradeAllAaveInstancesTo32/AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {AaveV3Ethereum, AaveV3EthereumAssets} from 'aave-address-book/AaveV3Ethereum.sol';
+import {IProposalGenericExecutor} from 'aave-helpers/src/interfaces/IProposalGenericExecutor.sol';
+
+/**
+ * @title Audit cost reimbursement
+ * @author BGD labs
+ * - Discussion: https://governance.aave.com/t/bgd-aave-v3-2-liquid-emodes/19037/4#p-48735-activation-stage-3
+ */
+contract AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924 is IProposalGenericExecutor {
+  address public constant BGD_RECEIVER = 0xb812d0944f8F581DfAA3a93Dda0d22EcEf51A9CF;
+
+  function execute() external {
+    AaveV3Ethereum.COLLECTOR.transfer(
+      AaveV3EthereumAssets.GHO_UNDERLYING,
+      BGD_RECEIVER,
+      76_000 ether
+    );
+  }
+}

src/20240924_Multi_UpgradeAllAaveInstancesTo32/AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924.t.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {AaveV3Ethereum, AaveV3EthereumAssets} from 'aave-address-book/AaveV3Ethereum.sol';
+import {IERC20} from 'solidity-utils/contracts/oz-common/interfaces/IERC20.sol';
+import {ProtocolV3TestBase, ReserveConfig} from 'aave-helpers/src/ProtocolV3TestBase.sol';
+import {AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924} from './AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924.sol';
+
+/**
+ * @dev Test for AaveV3Ethereum_GHOBorrowRateUpdate_20240814
+ * command: FOUNDRY_PROFILE=mainnet forge test --match-path=src/20240924_Multi_UpgradeAllAaveInstancesTo32/AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924.t.sol -vv
+ */
+contract AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924_Test is ProtocolV3TestBase {
+  address public constant BGD_RECEIVER = 0xb812d0944f8F581DfAA3a93Dda0d22EcEf51A9CF;
+  uint256 public constant AUDIT_COST = 76_000 ether;
+  AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924 internal proposal;
+
+  function setUp() public {
+    vm.createSelectFork(vm.rpcUrl('mainnet'), 20872348);
+    proposal = new AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924();
+  }
+
+  /**
+   * @dev executes the generic test suite including e2e and config snapshots
+   */
+  function test_defaultProposalExecution() public {
+    uint256 collectorBalanceBefore = IERC20(AaveV3EthereumAssets.GHO_UNDERLYING).balanceOf(
+      address(AaveV3Ethereum.COLLECTOR)
+    );
+    uint256 bgdBalanceBefore = IERC20(AaveV3EthereumAssets.GHO_UNDERLYING).balanceOf(BGD_RECEIVER);
+    defaultTest(
+      'AaveV3Ethereum_UpgradeAllAaveInstancesTo32_20240924',
+      AaveV3Ethereum.POOL,
+      address(proposal)
+    );
+    uint256 collectorBalanceAfter = IERC20(AaveV3EthereumAssets.GHO_UNDERLYING).balanceOf(
+      address(AaveV3Ethereum.COLLECTOR)
+    );
+    uint256 bgdBalanceAfter = IERC20(AaveV3EthereumAssets.GHO_UNDERLYING).balanceOf(BGD_RECEIVER);
+    assertEq(collectorBalanceBefore - AUDIT_COST, collectorBalanceAfter);
+    assertEq(bgdBalanceBefore + AUDIT_COST, bgdBalanceAfter);
+  }
+}

src/20240924_Multi_UpgradeAllAaveInstancesTo32/UpgradeAllAaveInstancesTo32.md

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+---
+title: "Upgrade all Aave instances to 3.2"
+author: "BGD Labs @bgdlabs"
+discussions: "https://governance.aave.com/t/bgd-aave-v3-2-liquid-emodes/19037/3"
+snapshot: "https://snapshot.org/#/aave.eth/proposal/0x68ce69b5e71df1d77c2ad814a5d41162a40be54473576ff590d0b1bb5afde4a7"
+---
+
+## Simple Summary
+
+Upgrades all active Aave instances to Aave 3.2 which debuts "Liquid eModes" and fully deprecated stable borrowing.
+
+## Motivation
+
+EModes have been a powerful feature since the inception of Aave v3.
+Liquid eModes builds on this success by increase the flexibility in configuring eModes. With Liquid eModes it is now possible, to have a single asset be listed in multiple eModes.
+At the same time, it's possible to granularly control which assets are collateral and borrowable inside an eMode.
+
+Stable debt has been off-boarded from Aave v3 for quite some time. What was remaining on the protocol code were merely artifacts that increased gas consumption and code size.
+Therefore the 3.2 release removes these artifacts in a backwards compatible way.
+
+_In addition to the upgrade itself, the proposal payload includes reimbursement of $76’000 denominated in GHO, to cover the cost of extra external security procedures incurred._
+
+## Specification
+
+Aave 3.2 focuses on two main areas of the aave protocol:
+
+- The final deprecation of stable borrowing
+- Improvements on the eModes, introducing "Liquid eModes"
+
+The proposal will execute to following operations on each active Aave v3 pool:
+
+- Upgrade the Pool/L2Pool implementation to 3.2, which will internally set the stableDebtToken address to `address(0)` on all assets
+- Upgrade the PoolConfigurator implementation to 3.2
+- Deploy new ProtocolDataProvider compatible with v3.2, and set it on the addresses provider contract
+- Migrate all assets currently in eMode to be both borrowable & collateral in eMode
+- Migrate the InterestRateStrategy to a new version without stable rate calculations
+
+An additional payload will transfer `76,000.00` GHO to the BGD-controlled address `0xb812d0944f8F581DfAA3a93Dda0d22EcEf51A9CF`.
+
+## Security procedures
+
+In addition to unit tests & integration test suites, the changes have been audited in 5 audits by 4 independent auditors:
+
+### Stable Rate and Liquid eModes
+
+- [Certora](https://github.com/aave-dao/aave-v3-origin/blob/v3.2.0/audits/2024-09-10_Certora_Aave-v3.2_Stable_Rate_Removal.pdf)
+- [Enigma Dark](https://github.com/aave-dao/aave-v3-origin/blob/v3.2.0/audits/2024-09-30_Enigma_Aave-v3.2.pdf)
+
+### Liquid eModes
+
+- [Certora](https://github.com/aave-dao/aave-v3-origin/blob/v3.2.0/audits/2024-09-19_Certora_Aave-v3.2_Liquid_eModes.pdf)
+- [Oxorio](https://github.com/aave-dao/aave-v3-origin/blob/v3.2.0/audits/2024-09-12_Oxorio_Aav3-v3.2.pdf)
+- [Pashov](https://github.com/aave-dao/aave-v3-origin/blob/v3.2.0/audits/2024-09-15_Pashov_Aave-v3.2.pdf)
+
+## References
+
+- [Payload Implementation](https://github.com/bgd-labs/protocol-v3.2-upgrade/blob/main/src/contracts/UpgradePayload.sol)
+- [New initialization logic of Pool](https://github.com/bgd-labs/protocol-v3.2-upgrade/blob/main/src/contracts/CustomInitialize.sol)
+- [New L1 pool implementation](https://github.com/bgd-labs/protocol-v3.2-upgrade/blob/main/src/contracts/PoolInstance.sol)
+- [New L2 pool implementation](https://github.com/bgd-labs/protocol-v3.2-upgrade/blob/main/src/contracts/L2PoolInstance.sol)
+- [Payload Tests](https://github.com/bgd-labs/protocol-v3.2-upgrade/tree/main/tests)
+- [Live-code and post execution state diffs](https://github.com/bgd-labs/protocol-v3.2-upgrade/tree/main/diffs)
+- [PoolDiff](https://github.com/aave-dao/aave-v3-origin/blob/v3.2.0/docs/3.2/3.1_3.2_L2PoolDiff.md), [PoolConfiguratorDiff](https://github.com/aave-dao/aave-v3-origin/blob/v3.2.0/docs/3.2/3.1-3.2_PoolConfiguratorDiff.md)
+- [Snapshot](https://snapshot.org/#/aave.eth/proposal/0x68ce69b5e71df1d77c2ad814a5d41162a40be54473576ff590d0b1bb5afde4a7)
+- [Discussion](https://governance.aave.com/t/bgd-aave-v3-2-liquid-emodes/19037/3)
+- [Migration guide](https://github.com/aave-dao/aave-v3-origin/blob/v3.2.0/docs/3.2/Aave-3.2-features.md)
+
+## Copyright
+
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).