Add second AIP for GHO Cross-Chain Launch

diffs/AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613_before_AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613_after.md

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+## Reserve changes
+
+### Reserves added
+
+#### GHO ([0x7dfF72693f6A4149b17e7C6314655f6A9F7c8B33](https://arbiscan.io/address/0x7dfF72693f6A4149b17e7C6314655f6A9F7c8B33))
+
+| description | value |
+| --- | --- |
+| decimals | 18 |
+| isActive | true |
+| isFrozen | false |
+| supplyCap | 1,000,000 GHO |
+| borrowCap | 900,000 GHO |
+| debtCeiling | 0 $ |
+| isSiloed | false |
+| isFlashloanable | true |
+| eModeCategory | 0 |
+| oracle | [0xB05984aD83C20b3ADE7bf97a9a0Cb539DDE28DBb](https://arbiscan.io/address/0xB05984aD83C20b3ADE7bf97a9a0Cb539DDE28DBb) |
+| oracleDecimals | 8 |
+| oracleLatestAnswer | 1 |
+| usageAsCollateralEnabled | false |
+| ltv | 0 % |
+| liquidationThreshold | 0 % |
+| liquidationBonus | 0 % |
+| liquidationProtocolFee | 0 % |
+| reserveFactor | 10 % |
+| aToken | [0xeBe517846d0F36eCEd99C735cbF6131e1fEB775D](https://arbiscan.io/address/0xeBe517846d0F36eCEd99C735cbF6131e1fEB775D) |
+| aTokenImpl | [0x1Be1798b70aEe431c2986f7ff48d9D1fa350786a](https://arbiscan.io/address/0x1Be1798b70aEe431c2986f7ff48d9D1fa350786a) |
+| variableDebtToken | [0x18248226C16BF76c032817854E7C83a2113B4f06](https://arbiscan.io/address/0x18248226C16BF76c032817854E7C83a2113B4f06) |
+| variableDebtTokenImpl | [0x5E76E98E0963EcDC6A065d1435F84065b7523f39](https://arbiscan.io/address/0x5E76E98E0963EcDC6A065d1435F84065b7523f39) |
+| stableDebtToken | [0x687871030477bf974725232F764aa04318A8b9c8](https://arbiscan.io/address/0x687871030477bf974725232F764aa04318A8b9c8) |
+| stableDebtTokenImpl | [0x0c2C95b24529664fE55D4437D7A31175CFE6c4f7](https://arbiscan.io/address/0x0c2C95b24529664fE55D4437D7A31175CFE6c4f7) |
+| borrowingEnabled | true |
+| stableBorrowRateEnabled | false |
+| isBorrowableInIsolation | false |
+| interestRateStrategy | [0x36d32fD7a72AD600be60Ccb71D3718E455025CaA](https://arbiscan.io/address/0x36d32fD7a72AD600be60Ccb71D3718E455025CaA) |
+| liquidityIndex | 1 |
+| variableBorrowIndex | 1 |
+| aTokenName | Aave Arbitrum GHO |
+| aTokenSymbol | aArbGHO |
+| currentLiquidityRate | 0 % |
+| currentVariableBorrowRate | 0 % |
+| isPaused | false |
+| stableDebtTokenName | Aave Arbitrum Stable Debt GHO |
+| stableDebtTokenSymbol | stableDebtArbGHO |
+| variableDebtTokenName | Aave Arbitrum Variable Debt GHO |
+| variableDebtTokenSymbol | variableDebtArbGHO |
+| optimalUsageRatio | 90 % |
+| maxExcessStableToTotalDebtRatio | 100 % |
+| maxExcessUsageRatio | 10 % |
+| optimalStableToTotalDebtRatio | 0 % |
+| baseVariableBorrowRate | 0 % |
+| variableRateSlope1 | 12 % |
+| variableRateSlope2 | 65 % |
+| baseStableBorrowRate | 12 % |
+| stableRateSlope1 | 0 % |
+| stableRateSlope2 | 0 % |
+| interestRate | ![ir](/.assets/014904fabcaa28d579bed688e1e3c35928c86f7c.svg) |
+
+
+## Raw diff
+
+```json
+{
+  "reserves": {
+    "0x7dfF72693f6A4149b17e7C6314655f6A9F7c8B33": {
+      "from": null,
+      "to": {
+        "aToken": "0xeBe517846d0F36eCEd99C735cbF6131e1fEB775D",
+        "aTokenImpl": "0x1Be1798b70aEe431c2986f7ff48d9D1fa350786a",
+        "aTokenName": "Aave Arbitrum GHO",
+        "aTokenSymbol": "aArbGHO",
+        "borrowCap": 900000,
+        "borrowingEnabled": true,
+        "currentLiquidityRate": 0,
+        "currentVariableBorrowRate": 0,
+        "debtCeiling": 0,
+        "decimals": 18,
+        "eModeCategory": 0,
+        "interestRateStrategy": "0x36d32fD7a72AD600be60Ccb71D3718E455025CaA",
+        "isActive": true,
+        "isBorrowableInIsolation": false,
+        "isFlashloanable": true,
+        "isFrozen": false,
+        "isPaused": false,
+        "isSiloed": false,
+        "liquidationBonus": 0,
+        "liquidationProtocolFee": 0,
+        "liquidationThreshold": 0,
+        "liquidityIndex": "1000000000000000000000000000",
+        "ltv": 0,
+        "oracle": "0xB05984aD83C20b3ADE7bf97a9a0Cb539DDE28DBb",
+        "oracleDecimals": 8,
+        "oracleLatestAnswer": 100000000,
+        "reserveFactor": 1000,
+        "stableBorrowRateEnabled": false,
+        "stableDebtToken": "0x687871030477bf974725232F764aa04318A8b9c8",
+        "stableDebtTokenImpl": "0x0c2C95b24529664fE55D4437D7A31175CFE6c4f7",
+        "stableDebtTokenName": "Aave Arbitrum Stable Debt GHO",
+        "stableDebtTokenSymbol": "stableDebtArbGHO",
+        "supplyCap": 1000000,
+        "symbol": "GHO",
+        "underlying": "0x7dfF72693f6A4149b17e7C6314655f6A9F7c8B33",
+        "usageAsCollateralEnabled": false,
+        "variableBorrowIndex": "1000000000000000000000000000",
+        "variableDebtToken": "0x18248226C16BF76c032817854E7C83a2113B4f06",
+        "variableDebtTokenImpl": "0x5E76E98E0963EcDC6A065d1435F84065b7523f39",
+        "variableDebtTokenName": "Aave Arbitrum Variable Debt GHO",
+        "variableDebtTokenSymbol": "variableDebtArbGHO"
+      }
+    }
+  },
+  "strategies": {
+    "0x7dfF72693f6A4149b17e7C6314655f6A9F7c8B33": {
+      "from": null,
+      "to": {
+        "address": "0x36d32fD7a72AD600be60Ccb71D3718E455025CaA",
+        "baseStableBorrowRate": "120000000000000000000000000",
+        "baseVariableBorrowRate": 0,
+        "maxExcessStableToTotalDebtRatio": "1000000000000000000000000000",
+        "maxExcessUsageRatio": "100000000000000000000000000",
+        "optimalStableToTotalDebtRatio": 0,
+        "optimalUsageRatio": "900000000000000000000000000",
+        "stableRateSlope1": 0,
+        "stableRateSlope2": 0,
+        "variableRateSlope1": "120000000000000000000000000",
+        "variableRateSlope2": "650000000000000000000000000"
+      }
+    }
+  }
+}
+```

src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {AaveV3Arbitrum, AaveV3ArbitrumEModes} from 'aave-address-book/AaveV3Arbitrum.sol';
+import {AaveV3PayloadArbitrum} from 'aave-helpers/v3-config-engine/AaveV3PayloadArbitrum.sol';
+import {EngineFlags} from 'aave-helpers/v3-config-engine/EngineFlags.sol';
+import {IAaveV3ConfigEngine} from 'aave-helpers/v3-config-engine/IAaveV3ConfigEngine.sol';
+import {IV3RateStrategyFactory} from 'aave-helpers/v3-config-engine/IV3RateStrategyFactory.sol';
+import {IERC20} from 'solidity-utils/contracts/oz-common/interfaces/IERC20.sol';
+import {SafeERC20} from 'solidity-utils/contracts/oz-common/SafeERC20.sol';
+/**
+ * @title GHO Cross-Chain Launch Part 2
+ * @author Aave Labs
+ * - Snapshot: https://snapshot.org/#/aave.eth/proposal/0x2a6ffbcff41a5ef98b7542f99b207af9c1e79e61f859d0a62f3bf52d3280877a
+ * - Discussion: https://governance.aave.com/t/arfc-gho-cross-chain-launch/17616
+ */
+contract AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613 is AaveV3PayloadArbitrum {
+  using SafeERC20 for IERC20;
+
+  address public constant GHO = 0x7dfF72693f6A4149b17e7C6314655f6A9F7c8B33;
+  uint256 public constant GHO_SEED_AMOUNT = 1e18;
+
+  function newListings() public pure override returns (IAaveV3ConfigEngine.Listing[] memory) {
+    IAaveV3ConfigEngine.Listing[] memory listings = new IAaveV3ConfigEngine.Listing[](1);
+
+    listings[0] = IAaveV3ConfigEngine.Listing({
+      asset: GHO,
+      assetSymbol: 'GHO',
+      priceFeed: 0xB05984aD83C20b3ADE7bf97a9a0Cb539DDE28DBb,
+      eModeCategory: AaveV3ArbitrumEModes.NONE,
+      enabledToBorrow: EngineFlags.ENABLED,
+      stableRateModeEnabled: EngineFlags.DISABLED,
+      borrowableInIsolation: EngineFlags.DISABLED,
+      withSiloedBorrowing: EngineFlags.DISABLED,
+      flashloanable: EngineFlags.ENABLED,
+      ltv: 0,
+      liqThreshold: 0,
+      liqBonus: 0,
+      reserveFactor: 10_00,
+      supplyCap: 1_000_000,
+      borrowCap: 900_000,
+      debtCeiling: 0,
+      liqProtocolFee: 0,
+      rateStrategyParams: IV3RateStrategyFactory.RateStrategyParams({
+        optimalUsageRatio: _bpsToRay(90_00),
+        baseVariableBorrowRate: _bpsToRay(0),
+        variableRateSlope1: _bpsToRay(12_00),
+        variableRateSlope2: _bpsToRay(65_00),
+        stableRateSlope1: _bpsToRay(0),
+        stableRateSlope2: _bpsToRay(0),
+        baseStableRateOffset: _bpsToRay(0),
+        stableRateExcessOffset: _bpsToRay(0),
+        optimalStableToTotalDebtRatio: _bpsToRay(0)
+      })
+    });
+
+    return listings;
+  }
+
+  function _postExecute() internal override {
+    IERC20(GHO).forceApprove(address(AaveV3Arbitrum.POOL), GHO_SEED_AMOUNT);
+    AaveV3Arbitrum.POOL.supply(GHO, GHO_SEED_AMOUNT, address(0), 0);
+  }
+}

src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613.t.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import 'forge-std/Test.sol';
+import {GovV3Helpers} from 'aave-helpers/GovV3Helpers.sol';
+import {ProtocolV3TestBase} from 'aave-helpers/ProtocolV3TestBase.sol';
+import {AaveV3Arbitrum} from 'aave-address-book/AaveV3Arbitrum.sol';
+import {GovernanceV3Arbitrum} from 'aave-address-book/GovernanceV3Arbitrum.sol';
+import {IERC20} from 'solidity-utils/contracts/oz-common/interfaces/IERC20.sol';
+
+import {AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613} from './AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613.sol';
+
+/**
+ * @dev Test for AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613
+ * command: FOUNDRY_PROFILE=arbitrum forge test --match-path=src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613.t.sol -vv
+ */
+contract AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613_Test is ProtocolV3TestBase {
+  AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613 internal proposal;
+
+  function setUp() public {
+    vm.createSelectFork(vm.rpcUrl('arbitrum'), 225178100);
+    proposal = new AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613();
+  }
+
+  /**
+   * @dev executes the generic test suite including e2e and config snapshots
+   */
+  function test_defaultProposalExecution() public {
+    // Mock Executor receives GHO, also makes sure total supply >= supply cap so e2e tests pass
+    deal(proposal.GHO(), GovernanceV3Arbitrum.EXECUTOR_LVL_1, 1_000_000e18, true);
+
+    defaultTest(
+      'AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613',
+      AaveV3Arbitrum.POOL,
+      address(proposal)
+    );
+
+    (address aTokenAddress, , ) = AaveV3Arbitrum
+      .AAVE_PROTOCOL_DATA_PROVIDER
+      .getReserveTokensAddresses(proposal.GHO());
+    assertGe(IERC20(aTokenAddress).balanceOf(address(0)), proposal.GHO_SEED_AMOUNT());
+  }
+
+  function test_defaultProposalExecutionExactSeed() public {
+    // Mock Executor receives GHO seed amount
+    deal(proposal.GHO(), GovernanceV3Arbitrum.EXECUTOR_LVL_1, proposal.GHO_SEED_AMOUNT());
+
+    GovV3Helpers.executePayload(vm, address(proposal));
+
+    (address aTokenAddress, , ) = AaveV3Arbitrum
+      .AAVE_PROTOCOL_DATA_PROVIDER
+      .getReserveTokensAddresses(proposal.GHO());
+    assertGe(IERC20(aTokenAddress).balanceOf(address(0)), proposal.GHO_SEED_AMOUNT());
+  }
+
+  function testFail_defaultProposalExecutionNoSeed() public {
+    GovV3Helpers.executePayload(vm, address(proposal));
+  }
+}

src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/GHOCrossChainLaunchPart2.md

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+---
+title: "GHO Cross-Chain - Part 2"
+author: "Aave Labs"
+discussions: "https://governance.aave.com/t/arfc-gho-cross-chain-launch/17616"
+snapshot: "https://snapshot.org/#/aave.eth/proposal/0x2a6ffbcff41a5ef98b7542f99b207af9c1e79e61f859d0a62f3bf52d3280877a"
+---
+
+## Simple Summary
+
+This AIP is the Part 2 for the GHO Cross-Chain proposal and proposes the configuration of GHO on Arbitrum Aave V3 Pool in connection with the cross-chain implementation strategy.
+
+Following the successful expansion of GHO to the Arbitrum network, this AIP proposes to onboard GHO into the Arbitrum Aave Pool as a borrowable asset, adopting risk parameters formulated by Chaos Labs.
+
+## Motivation
+
+The implementation of the GHO Cross Chain proposal required the proposal AIP to be split into two separate AIPs. This proposal is the second AIP (“Part 2”) for configuration of GHO on Arbitrum Aave Pool adopting risk parameters formulated by Chaos Labs.
+
+## Specification
+
+The table below illustrates the configured risk parameters for **GHO**
+
+| Parameter                          |                                      Value |
+| ---------------------------------- | -----------------------------------------: |
+| Isolation Mode                     |                                      false |
+| Borrowable                         |                                    ENABLED |
+| Collateral Enabled                 |                                      false |
+| Supply Cap (GHO)                   |                                  1,000,000 |
+| Borrow Cap (GHO)                   |                                    900,000 |
+| Debt Ceiling                       |                                      USD 0 |
+| LTV                                |                                        0 % |
+| LT                                 |                                        0 % |
+| Liquidation Bonus                  |                                        0 % |
+| Liquidation Protocol Fee           |                                        0 % |
+| Reserve Factor                     |                                       10 % |
+| Base Variable Borrow Rate          |                                        0 % |
+| Variable Slope 1                   |                                       12 % |
+| Variable Slope 2                   |                                       65 % |
+| Uoptimal                           |                                       90 % |
+| Stable Borrowing                   |                                   DISABLED |
+| Stable Slope1                      |                                        0 % |
+| Stable Slope2                      |                                        0 % |
+| Base Stable Rate Offset            |                                        0 % |
+| Stable Rate Excess Offset          |                                        0 % |
+| Optimal Stable To Total Debt Ratio |                                        0 % |
+| Flashloanable                      |                                    ENABLED |
+| Siloed Borrowing                   |                                   DISABLED |
+| Borrowable in Isolation            |                                   DISABLED |
+| Oracle                             | 0xB05984aD83C20b3ADE7bf97a9a0Cb539DDE28DBb |
+
+## References
+
+- Implementation: [AaveV3Arbitrum](https://github.com/bgd-labs/aave-proposals-v3/blob/main/src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613.sol)
+- Tests: [AaveV3Arbitrum](https://github.com/bgd-labs/aave-proposals-v3/blob/main/src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613.t.sol)
+- [Snapshot](https://snapshot.org/#/aave.eth/proposal/0x2a6ffbcff41a5ef98b7542f99b207af9c1e79e61f859d0a62f3bf52d3280877a)
+- [Discussion](https://governance.aave.com/t/arfc-gho-cross-chain-launch/17616)
+
+## Copyright
+
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).

src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/GHOCrossChainLaunchPart2_20240613.s.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {GovV3Helpers, IPayloadsControllerCore, PayloadsControllerUtils} from 'aave-helpers/GovV3Helpers.sol';
+import {AaveV3Arbitrum} from 'aave-address-book/AaveV3Arbitrum.sol';
+import {GovernanceV3Ethereum} from 'aave-address-book/GovernanceV3Ethereum.sol';
+import {EthereumScript, ArbitrumScript} from 'aave-helpers/ScriptUtils.sol';
+import {AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613} from './AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613.sol';
+
+/**
+ * @dev Deploy Arbitrum
+ * deploy-command: make deploy-ledger contract=src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/GHOCrossChainLaunchPart2_20240613.s.sol:DeployArbitrum chain=arbitrum
+ * verify-command: FOUNDRY_PROFILE=arbitrum npx catapulta-verify -b broadcast/GHOCrossChainLaunchPart2_20240613.s.sol/42161/run-latest.json
+ */
+contract DeployArbitrum is ArbitrumScript {
+  function run() external broadcast {
+    // deploy payloads
+    address payload0 = GovV3Helpers.deployDeterministic(
+      type(AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613).creationCode
+    );
+
+    // compose action
+    IPayloadsControllerCore.ExecutionAction[]
+      memory actions = new IPayloadsControllerCore.ExecutionAction[](1);
+    actions[0] = GovV3Helpers.buildAction(payload0);
+
+    // register action at payloadsController
+    GovV3Helpers.createPayload(actions);
+  }
+}
+
+/**
+ * @dev Create Proposal
+ * command: make deploy-ledger contract=src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/GHOCrossChainLaunchPart2_20240613.s.sol:CreateProposal chain=mainnet
+ */
+contract CreateProposal is EthereumScript {
+  function run() external {
+    // create payloads
+    PayloadsControllerUtils.Payload[] memory payloads = new PayloadsControllerUtils.Payload[](1);
+
+    // compose actions for validation
+    IPayloadsControllerCore.ExecutionAction[]
+      memory actionsArbitrum = new IPayloadsControllerCore.ExecutionAction[](1);
+    actionsArbitrum[0] = GovV3Helpers.buildAction(
+      type(AaveV3Arbitrum_GHOCrossChainLaunchPart2_20240613).creationCode
+    );
+    payloads[0] = GovV3Helpers.buildArbitrumPayload(vm, actionsArbitrum);
+
+    // create proposal
+    vm.startBroadcast();
+    GovV3Helpers.createProposal(
+      vm,
+      payloads,
+      GovernanceV3Ethereum.VOTING_PORTAL_ETH_POL,
+      GovV3Helpers.ipfsHashFile(
+        vm,
+        'src/20240613_AaveV3Arbitrum_GHOCrossChainLaunchPart2/GHOCrossChainLaunchPart2.md'
+      )
+    );
+  }
+}