[midnight adapter] Add revoker for large action data

src/periphery/README.md

@@ -5,6 +5,10 @@ Blue public allocator contracts are in [blue-public-allocator](./blue-public-all
 Gate contracts are in [gates](./gates/).
 Adapter registry contracts are in [registries](./registries/).
 
+## Revoker
+
+`Revoker` lets vault sentinels cancel pending vault or adapter actions whose data is too large to send in a transaction. It is recommended to add it as a vault sentinel.
+
 ## Blue Public Allocator
 
 `BluePublicAllocator` lets anyone (not only the vault's allocators) reallocate a Vault V2's liquidity between Morpho Blue markets reached through the `MorphoMarketV1AdapterV2`, within the vault's caps, and the public allocator's own limits.

src/periphery/Revoker.sol

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2026 Morpho Association
+pragma solidity 0.8.28;
+
+import {IVaultV2} from "../interfaces/IVaultV2.sol";
+import {IMorphoMarketV1AdapterV2} from "../adapters/interfaces/IMorphoMarketV1AdapterV2.sol";
+
+interface RevokeSource {
+    function revokeData() external view returns (bytes memory);
+}
+
+/// @dev This contract can safely have the sentinel role in any vault.
+contract Revoker {
+    error NotSentinel();
+    error InvalidTarget();
+    error DeploymentFailed();
+
+    /// @dev Deploys a contract that returns bytes to revoke on target.
+    function revoke(address vault, address target, bytes memory creationCode) external {
+        require(target == vault || IMorphoMarketV1AdapterV2(target).parentVault() == vault, InvalidTarget());
+        require(IVaultV2(vault).isSentinel(msg.sender), NotSentinel());
+
+        address source;
+        assembly ("memory-safe") {
+            source := create(0, add(creationCode, 32), mload(creationCode))
+        }
+        require(source != address(0), DeploymentFailed());
+
+        IVaultV2(target).revoke(RevokeSource(source).revokeData());
+    }
+}