feat: USTB supply cap update

diffs/AaveV3Horizon_USTBSupplyCap_20260514_before_AaveV3Horizon_USTBSupplyCap_20260514_after.md

@@ -0,0 +1,51 @@
+## Reserve changes
+
+### Reserves altered
+
+#### USTB ([0x43415eB6ff9DB7E26A15b704e7A3eDCe97d31C4e](https://etherscan.io/address/0x43415eB6ff9DB7E26A15b704e7A3eDCe97d31C4e))
+
+| description | value before | value after |
+| --- | --- | --- |
+| supplyCap | 6,000,000 USTB | 8,000,000 USTB |
+
+
+## Raw diff
+
+```json
+{
+  "reserves": {
+    "0x43415eB6ff9DB7E26A15b704e7A3eDCe97d31C4e": {
+      "supplyCap": {
+        "from": 6000000,
+        "to": 8000000
+      }
+    }
+  },
+  "raw": {
+    "0xae05cd22df81871bc7cc2a04becfb516bfe332c8": {
+      "label": null,
+      "contract": "lib/aave-umbrella/lib/aave-v3-origin/lib/solidity-utils/lib/openzeppelin-contracts-upgradeable/lib/openzeppelin-contracts/contracts/proxy/transparent/TransparentUpgradeableProxy.sol:TransparentUpgradeableProxy",
+      "balanceDiff": null,
+      "nonceDiff": null,
+      "stateDiff": {
+        "0x11567aab4cd72d4842d11c42514ff879ac1d304b8bb2969ce8bddb1f43474e61": {
+          "previousValue": "0x100000000000000000000000000005b8d8000000000000000106283c23282260",
+          "newValue": "0x100000000000000000000000000007a120000000000000000106283c23282260"
+        }
+      }
+    },
+    "0xe6ec1f0ae6cd023bd0a9b4d0253bdc755103253c": {
+      "label": null,
+      "contract": null,
+      "balanceDiff": null,
+      "nonceDiff": null,
+      "stateDiff": {
+        "0x0000000000000000000000000000000000000000000000000000000000000005": {
+          "previousValue": "0x0000000000000000000000000000000000000000000000000000000000000031",
+          "newValue": "0x0000000000000000000000000000000000000000000000000000000000000032"
+        }
+      }
+    }
+  }
+}
+```

src/AaveV3Horizon_USTBSupplyCap_20260514/AaveV3Horizon_USTBSupplyCap_20260514.t.sol

@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {IPoolDataProvider} from 'aave-v3-origin/contracts/interfaces/IPoolDataProvider.sol';
+import {ProtocolV3HorizonTestBase, ReserveConfig} from 'tests/utils/ProtocolV3HorizonTestBase.sol';
+import {AaveV3EthereumHorizon, AaveV3EthereumHorizonAssets} from 'aave-address-book-latest/AaveV3EthereumHorizon.sol';
+import {AaveHorizonGovV3Helpers} from 'src/utils/AaveHorizonGovV3Helpers.sol';
+
+/**
+ * @dev Test for GHO caps update via multisig transaction.
+ * command: FOUNDRY_PROFILE=test forge test --match-contract AaveV3Horizon_USTBSupplyCap_20260514 -vv
+ */
+contract AaveV3Horizon_USTBSupplyCap_20260514 is ProtocolV3HorizonTestBase {
+  address internal constant OPS_TARGET = 0x83Cb1B4af26EEf6463aC20AFbAC9c0e2E017202F;
+  // from Safe UI
+  bytes internal constant OPS_DATA =
+    hex'571f03e500000000000000000000000043415eb6ff9db7e26a15b704e7a3edce97d31c4e00000000000000000000000000000000000000000000000000000000007a1200';
+  uint256 internal constant OPS_NONCE = 49;
+
+  function setUp() public {
+    vm.createSelectFork(vm.rpcUrl('mainnet'), 25095755);
+  }
+
+  /**
+   * @dev Full test suite: snapshots, state diff, validations, e2e.
+   */
+  function test_defaultProposalExecution() public {
+    defaultTest_v3_3('AaveV3Horizon_USTBSupplyCap_20260514', _pool(), _executeUSTBSupplyCapUpdate);
+  }
+
+  /**
+   * @dev Custom before/after assertions for the USTB supply cap change.
+   */
+  function test_ustbSupplyCapChange() public {
+    (, uint256 supplyCapBefore) = (
+      IPoolDataProvider(AaveV3EthereumHorizon.AAVE_PROTOCOL_DATA_PROVIDER).getReserveCaps(
+        AaveV3EthereumHorizonAssets.USTB_UNDERLYING
+      )
+    );
+
+    assertEq(supplyCapBefore, 6_000_000, 'Supply cap before');
+
+    _executeUSTBSupplyCapUpdate();
+
+    (, uint256 supplyCapAfter) = (
+      IPoolDataProvider(AaveV3EthereumHorizon.AAVE_PROTOCOL_DATA_PROVIDER).getReserveCaps(
+        AaveV3EthereumHorizonAssets.USTB_UNDERLYING
+      )
+    );
+
+    assertEq(supplyCapAfter, 8_000_000, 'Supply cap after');
+  }
+
+  function test_calldata() public pure {
+    AaveHorizonGovV3Helpers.Action memory action = AaveHorizonGovV3Helpers.Action({
+      to: address(AaveV3EthereumHorizon.POOL_CONFIGURATOR),
+      data: abi.encodeCall(
+        AaveV3EthereumHorizon.POOL_CONFIGURATOR.setSupplyCap,
+        (AaveV3EthereumHorizonAssets.USTB_UNDERLYING, 8_000_000)
+      )
+    });
+    (address to, bytes memory data, uint8 operation) = AaveHorizonGovV3Helpers
+      .createOpsMultisigCalldata(action);
+    assertEq(to, OPS_TARGET, 'ops target mismatch');
+    assertEq(data, OPS_DATA, 'ops calldata mismatch');
+    assertEq(operation, 0, 'ops operation mismatch');
+  }
+
+  function _executeUSTBSupplyCapUpdate() internal {
+    _executeOpsMultisigTx({to: OPS_TARGET, data: OPS_DATA, operation: 0, nonce: OPS_NONCE});
+  }
+}