Gelato Oracle Swap Freezer

src/contracts/facilitators/gsm/swapFreezer/ChainlinkOracleSwapFreezer.sol

@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.10;
+
+import {AutomationCompatibleInterface} from 'src/contracts/dependencies/chainlink/AutomationCompatibleInterface.sol';
+import {IPoolAddressesProvider} from 'aave-v3-origin/contracts/interfaces/IPoolAddressesProvider.sol';
+import {IGsm} from 'src/contracts/facilitators/gsm/interfaces/IGsm.sol';
+import {OracleSwapFreezerBase} from 'src/contracts/facilitators/gsm/swapFreezer/OracleSwapFreezerBase.sol';
+
+/**
+ * @title ChainlinkOracleSwapFreezer
+ * @notice Chainlink-compatible automated swap freezer for GSM.
+ */
+contract ChainlinkOracleSwapFreezer is OracleSwapFreezerBase, AutomationCompatibleInterface {
+  /**
+   * @dev Constructor
+   * @dev Freeze/unfreeze bounds are specified in USD with 8-decimal precision, like Aave v3 Price Oracles
+   * @dev Unfreeze boundaries are "contained" in freeze boundaries, where freezeLowerBound < unfreezeLowerBound and unfreezeUpperBound < freezeUpperBound
+   * @dev All bound ranges are inclusive
+   * @param gsm The GSM that this contract will trigger freezes/unfreezes on
+   * @param underlyingAsset The address of the collateral asset
+   * @param addressesProvider The Aave Addresses Provider for looking up the Price Oracle
+   * @param freezeLowerBound The lower price bound for freeze operations
+   * @param freezeUpperBound The upper price bound for freeze operations
+   * @param unfreezeLowerBound The lower price bound for unfreeze operations, must be 0 if unfreezing not allowed
+   * @param unfreezeUpperBound The upper price bound for unfreeze operations, must be 0 if unfreezing not allowed
+   * @param allowUnfreeze True if bounds verification should factor in the unfreeze boundary, false otherwise
+   */
+  constructor(
+    IGsm gsm,
+    address underlyingAsset,
+    IPoolAddressesProvider addressesProvider,
+    uint128 freezeLowerBound,
+    uint128 freezeUpperBound,
+    uint128 unfreezeLowerBound,
+    uint128 unfreezeUpperBound,
+    bool allowUnfreeze
+  )
+    OracleSwapFreezerBase(
+      gsm,
+      underlyingAsset,
+      addressesProvider,
+      freezeLowerBound,
+      freezeUpperBound,
+      unfreezeLowerBound,
+      unfreezeUpperBound,
+      allowUnfreeze
+    )
+  {}
+
+  /// @inheritdoc AutomationCompatibleInterface
+  function performUpkeep(bytes calldata) external {
+    _execute();
+  }
+
+  /// @inheritdoc AutomationCompatibleInterface
+  function checkUpkeep(bytes calldata) external view returns (bool, bytes memory) {
+    return (_checkExecute(), '');
+  }
+}

src/contracts/facilitators/gsm/swapFreezer/GelatoOracleSwapFreezer.sol

@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.10;
+
+import {IGelatoOracleSwapFreezer} from 'src/contracts/facilitators/gsm/swapFreezer/interfaces/IGelatoOracleSwapFreezer.sol';
+import {IPoolAddressesProvider} from 'aave-v3-origin/contracts/interfaces/IPoolAddressesProvider.sol';
+import {IGsm} from 'src/contracts/facilitators/gsm/interfaces/IGsm.sol';
+import {OracleSwapFreezerBase} from 'src/contracts/facilitators/gsm/swapFreezer/OracleSwapFreezerBase.sol';
+
+/**
+ * @title GelatoOracleSwapFreezer
+ * @notice Gelato-compatible automated swap freezer for GSM.
+ */
+contract GelatoOracleSwapFreezer is OracleSwapFreezerBase, IGelatoOracleSwapFreezer {
+  /**
+   * @dev Constructor
+   * @dev Freeze/unfreeze bounds are specified in USD with 8-decimal precision, like Aave v3 Price Oracles
+   * @dev Unfreeze boundaries are "contained" in freeze boundaries, where freezeLowerBound < unfreezeLowerBound and unfreezeUpperBound < freezeUpperBound
+   * @dev All bound ranges are inclusive
+   * @param gsm The GSM that this contract will trigger freezes/unfreezes on
+   * @param underlyingAsset The address of the collateral asset
+   * @param addressesProvider The Aave Addresses Provider for looking up the Price Oracle
+   * @param freezeLowerBound The lower price bound for freeze operations
+   * @param freezeUpperBound The upper price bound for freeze operations
+   * @param unfreezeLowerBound The lower price bound for unfreeze operations, must be 0 if unfreezing not allowed
+   * @param unfreezeUpperBound The upper price bound for unfreeze operations, must be 0 if unfreezing not allowed
+   * @param allowUnfreeze True if bounds verification should factor in the unfreeze boundary, false otherwise
+   */
+  constructor(
+    IGsm gsm,
+    address underlyingAsset,
+    IPoolAddressesProvider addressesProvider,
+    uint128 freezeLowerBound,
+    uint128 freezeUpperBound,
+    uint128 unfreezeLowerBound,
+    uint128 unfreezeUpperBound,
+    bool allowUnfreeze
+  )
+    OracleSwapFreezerBase(
+      gsm,
+      underlyingAsset,
+      addressesProvider,
+      freezeLowerBound,
+      freezeUpperBound,
+      unfreezeLowerBound,
+      unfreezeUpperBound,
+      allowUnfreeze
+    )
+  {}
+
+  /**
+   * @dev Performs the swap freeze action depending on the oracle value
+   */
+  function performUpkeep(bytes calldata) external {
+    _execute();
+  }
+
+  /**
+   * @notice Returns whether the action can be performed and the encoded call data for execution.
+   * @return True if the action can be performed, false otherwise.
+   * @return The encoded call data for the action to be executed.
+   */
+  function checkUpkeep(bytes calldata) external view returns (bool, bytes memory) {
+    return (_getAction() == Action.NONE ? false : true, abi.encodeCall(this.performUpkeep, ('')));
+  }
+}

src/contracts/facilitators/gsm/swapFreezer/OracleSwapFreezer.sol → src/contracts/facilitators/gsm/swapFreezer/OracleSwapFreezerBase.sol

@@ -3,18 +3,17 @@ pragma solidity ^0.8.10;
 
 import {IPoolAddressesProvider} from 'aave-v3-origin/contracts/interfaces/IPoolAddressesProvider.sol';
 import {IPriceOracle} from 'aave-v3-origin/contracts/interfaces/IPriceOracle.sol';
-import {AutomationCompatibleInterface} from 'src/contracts/dependencies/chainlink/AutomationCompatibleInterface.sol';
 import {IGsm} from 'src/contracts/facilitators/gsm/interfaces/IGsm.sol';
 
 /**
- * @title OracleSwapFreezer
+ * @title OracleSwapFreezerBase
  * @author Aave
  * @notice Swap freezer that enacts the freeze action based on underlying oracle price, GSM's state and predefined price boundaries
- * @dev Chainlink Automation-compatible contract using Aave V3 Price Oracle, where prices are USD denominated with 8-decimal precision
+ * @dev It uses Aave V3 Price Oracle, where prices are USD denominated with 8-decimal precision
  * @dev Freeze action is executable if GSM is not seized, not frozen and price is outside of the freeze bounds
  * @dev Unfreeze action is executable if GSM is not seized, frozen, unfreezing is allowed and price is inside the unfreeze bounds
  */
-contract OracleSwapFreezer is AutomationCompatibleInterface {
+abstract contract OracleSwapFreezerBase {
   enum Action {
     NONE,
     FREEZE,
@@ -37,7 +36,7 @@ contract OracleSwapFreezer is AutomationCompatibleInterface {
    * @dev All bound ranges are inclusive
    * @param gsm The GSM that this contract will trigger freezes/unfreezes on
    * @param underlyingAsset The address of the collateral asset
-   * @param addressProvider The Aave Addresses Provider for looking up the Price Oracle
+   * @param addressesProvider The Aave Addresses Provider for looking up the Price Oracle
    * @param freezeLowerBound The lower price bound for freeze operations
    * @param freezeUpperBound The upper price bound for freeze operations
    * @param unfreezeLowerBound The lower price bound for unfreeze operations, must be 0 if unfreezing not allowed
@@ -47,7 +46,7 @@ contract OracleSwapFreezer is AutomationCompatibleInterface {
   constructor(
     IGsm gsm,
     address underlyingAsset,
-    IPoolAddressesProvider addressProvider,
+    IPoolAddressesProvider addressesProvider,
     uint128 freezeLowerBound,
     uint128 freezeUpperBound,
     uint128 unfreezeLowerBound,
@@ -67,16 +66,18 @@ contract OracleSwapFreezer is AutomationCompatibleInterface {
     );
     GSM = gsm;
     UNDERLYING_ASSET = underlyingAsset;
-    ADDRESS_PROVIDER = addressProvider;
+    ADDRESS_PROVIDER = addressesProvider;
     _freezeLowerBound = freezeLowerBound;
     _freezeUpperBound = freezeUpperBound;
     _unfreezeLowerBound = unfreezeLowerBound;
     _unfreezeUpperBound = unfreezeUpperBound;
     _allowUnfreeze = allowUnfreeze;
   }
 
-  /// @inheritdoc AutomationCompatibleInterface
-  function performUpkeep(bytes calldata) external {
+  /**
+   * @dev Performs the swap freeze action depending on the oracle value
+   */
+  function _execute() internal {
     Action action = _getAction();
     if (action == Action.FREEZE) {
       GSM.setSwapFreeze(true);
@@ -85,9 +86,12 @@ contract OracleSwapFreezer is AutomationCompatibleInterface {
     }
   }
 
-  /// @inheritdoc AutomationCompatibleInterface
-  function checkUpkeep(bytes calldata) external view returns (bool, bytes memory) {
-    return (_getAction() == Action.NONE ? false : true, '');
+  /**
+   * @dev Returns whether the action can be performed
+   * @return True if the action can be performed, false otherwise.
+   */
+  function _checkExecute() internal view returns (bool) {
+    return _getAction() == Action.NONE ? false : true;
   }
 
   /**

src/contracts/facilitators/gsm/swapFreezer/interfaces/IGelatoOracleSwapFreezer.sol

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+interface IGelatoOracleSwapFreezer {
+  function performUpkeep(bytes calldata) external;
+  function checkUpkeep(bytes calldata) external view returns (bool, bytes memory);
+}

tests/unit/TestChainlinkOracleSwapFreezer.t.sol

@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import './TestOracleSwapFreezerBase.t.sol';
+
+contract TestChainlinkOracleSwapFreezer is TestOracleSwapFreezerBase {
+  function _deployOracleSwapFreezer(
+    IGsm gsm,
+    address underlyingAsset,
+    IPoolAddressesProvider addressesProvider,
+    uint128 freezeLowerBound,
+    uint128 freezeUpperBound,
+    uint128 unfreezeLowerBound,
+    uint128 unfreezeUpperBound,
+    bool allowUnfreeze
+  ) internal override returns (address) {
+    return
+      address(
+        new ChainlinkOracleSwapFreezer(
+          gsm,
+          underlyingAsset,
+          addressesProvider,
+          freezeLowerBound,
+          freezeUpperBound,
+          unfreezeLowerBound,
+          unfreezeUpperBound,
+          allowUnfreeze
+        )
+      );
+  }
+
+  function _checkAutomation(address swapFreezer) internal view override returns (bool) {
+    bytes memory returnData = Address.functionStaticCall(
+      swapFreezer,
+      abi.encodeWithSelector(AutomationCompatibleInterface.checkUpkeep.selector, '')
+    );
+    (bool shouldRunKeeper, ) = abi.decode(returnData, (bool, bytes));
+    return shouldRunKeeper;
+  }
+
+  function _checkAndPerformAutomation(address swapFreezer) internal override returns (bool) {
+    bytes memory returnData = Address.functionStaticCall(
+      swapFreezer,
+      abi.encodeWithSelector(AutomationCompatibleInterface.checkUpkeep.selector, '')
+    );
+    (bool shouldRunKeeper, bytes memory performData) = abi.decode(returnData, (bool, bytes));
+
+    if (shouldRunKeeper) {
+      AutomationCompatibleInterface(swapFreezer).performUpkeep(performData);
+    }
+    return shouldRunKeeper;
+  }
+}

tests/unit/TestGelatoOracleSwapFreezer.t.sol

@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import './TestOracleSwapFreezerBase.t.sol';
+
+contract TestGelatoOracleSwapFreezer is TestOracleSwapFreezerBase {
+  using Address for address;
+
+  function testCheckUpkeepReturnsCorrectSelector() public view {
+    (, bytes memory data) = IGelatoOracleSwapFreezer(swapFreezer).checkUpkeep('');
+    bytes4 selector;
+    assembly {
+      selector := mload(add(data, 32))
+    }
+    assertEq(selector, IGelatoOracleSwapFreezer.performUpkeep.selector);
+  }
+
+  function _deployOracleSwapFreezer(
+    IGsm gsm,
+    address underlyingAsset,
+    IPoolAddressesProvider addressesProvider,
+    uint128 freezeLowerBound,
+    uint128 freezeUpperBound,
+    uint128 unfreezeLowerBound,
+    uint128 unfreezeUpperBound,
+    bool allowUnfreeze
+  ) internal override returns (address) {
+    return
+      address(
+        new GelatoOracleSwapFreezer(
+          gsm,
+          underlyingAsset,
+          addressesProvider,
+          freezeLowerBound,
+          freezeUpperBound,
+          unfreezeLowerBound,
+          unfreezeUpperBound,
+          allowUnfreeze
+        )
+      );
+  }
+
+  function _checkAutomation(address swapFreezer) internal view override returns (bool) {
+    (bool shouldRunKeeper, ) = IGelatoOracleSwapFreezer(swapFreezer).checkUpkeep('');
+    return shouldRunKeeper;
+  }
+
+  function _checkAndPerformAutomation(
+    address swapFreezer
+  ) internal virtual override returns (bool) {
+    (bool shouldRunKeeper, bytes memory encodedPerformCall) = IGelatoOracleSwapFreezer(swapFreezer)
+      .checkUpkeep('');
+    if (shouldRunKeeper) {
+      swapFreezer.functionCall(encodedPerformCall);
+    }
+    return shouldRunKeeper;
+  }
+}

tests/unit/TestGhoBase.t.sol

@@ -5,6 +5,10 @@ import 'forge-std/Test.sol';
 import 'forge-std/console2.sol';
 import {Vm} from 'forge-std/Vm.sol';
 
+// dependencies
+import {Address} from 'openzeppelin-contracts/contracts/utils/Address.sol';
+import {AutomationCompatibleInterface} from 'src/contracts/dependencies/chainlink/AutomationCompatibleInterface.sol';
+
 // helpers
 import {Constants} from '../helpers/Constants.sol';
 import {DebtUtils} from '../helpers/DebtUtils.sol';
@@ -83,6 +87,10 @@ import {GhoGsmSteward} from 'src/contracts/misc/GhoGsmSteward.sol';
 import {FixedFeeStrategyFactory} from 'src/contracts/facilitators/gsm/feeStrategy/FixedFeeStrategyFactory.sol';
 import {GhoReserve} from 'src/contracts/facilitators/gsm/GhoReserve.sol';
 import {OwnableFacilitator} from 'src/contracts/facilitators/gsm/OwnableFacilitator.sol';
+import {OracleSwapFreezerBase} from 'src/contracts/facilitators/gsm/swapFreezer/OracleSwapFreezerBase.sol';
+import {ChainlinkOracleSwapFreezer} from 'src/contracts/facilitators/gsm/swapFreezer/ChainlinkOracleSwapFreezer.sol';
+import {GelatoOracleSwapFreezer} from 'src/contracts/facilitators/gsm/swapFreezer/GelatoOracleSwapFreezer.sol';
+import {IGelatoOracleSwapFreezer} from 'src/contracts/facilitators/gsm/swapFreezer/interfaces/IGelatoOracleSwapFreezer.sol';
 
 // CCIP contracts
 import {MockUpgradeableLockReleaseTokenPool} from '../mocks/MockUpgradeableLockReleaseTokenPool.sol';