Add ArbCensoredTransactionsManager precompile

Author: MishkaRogachev

ArbCensoredTransactionsManager.sol

@@ -0,0 +1,31 @@
+// Copyright 2025, Offchain Labs, Inc.
+// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
+// SPDX-License-Identifier: BUSL-1.1
+
+pragma solidity >=0.4.21 <0.9.0;
+
+/**
+ * @title Enables ability to censor transactions by authorized callers.
+ * @notice Authorized callers are added/removed through ArbOwner precompile.
+ *         Available in ArbOS version 60 and above
+ */
+interface ArbCensoredTransactionsManager {
+    /// @notice Marks the given transaction hash as censored
+    /// @param txHash The transaction hash to censor
+    function addCensoredTransaction(
+        bytes32 txHash
+    ) external;
+
+    /// @notice Removes censorship mark for the given transaction hash
+    /// @param txHash The transaction hash to uncensor
+    function deleteCensoredTransaction(
+        bytes32 txHash
+    ) external;
+
+    /// @notice Checks whether the given transaction hash is censored
+    /// @param txHash The transaction hash to check
+    /// @return True if censored, false otherwise
+    function isTransactionCensored(
+        bytes32 txHash
+    ) external view returns (bool);
+}