contracts: Fix OZ-M-06 - Unpause functionality

packages/contracts-bedrock/.gas-snapshot

@@ -23,20 +23,22 @@ L1BlockTest:test_updateValues() (gas: 28215)
 L1BlockNumberTest:test_fallback() (gas: 18773)
 L1BlockNumberTest:test_getL1BlockNumber() (gas: 10589)
 L1BlockNumberTest:test_receive() (gas: 25436)
-L1CrossDomainMessenger_Test:testCannot_L1MessengerPause() (gas: 10909)
-L1CrossDomainMessenger_Test:test_L1MessengerMessageVersion() (gas: 8366)
-L1CrossDomainMessenger_Test:test_L1MessengerPause() (gas: 31882)
-L1CrossDomainMessenger_Test:test_L1MessengerRelayMessageSucceeds() (gas: 61239)
-L1CrossDomainMessenger_Test:test_L1MessengerRelayMessageToSystemContract() (gas: 44859)
-L1CrossDomainMessenger_Test:test_L1MessengerRelayShouldRevertIfPaused() (gas: 41631)
-L1CrossDomainMessenger_Test:test_L1MessengerSendMessage() (gas: 172148)
-L1CrossDomainMessenger_Test:test_L1MessengerTwiceSendMessage() (gas: 1254131)
-L1CrossDomainMessenger_Test:test_L1MessengerXDomainSenderReverts() (gas: 10566)
-L1CrossDomainMessenger_Test:test_L1MessengerxDomainMessageSenderResets() (gas: 58535)
-L1StandardBridge_Test:test_depositERC20() (gas: 452837)
-L1StandardBridge_Test:test_depositERC20To() (gas: 454614)
-L1StandardBridge_Test:test_depositETH() (gas: 247054)
-L1StandardBridge_Test:test_depositETHTo() (gas: 204938)
+L1CrossDomainMessenger_Test:testCannot_L1MessengerPause() (gas: 10844)
+L1CrossDomainMessenger_Test:testCannot_L1MessengerUnpause() (gas: 10858)
+L1CrossDomainMessenger_Test:test_L1MessengerMessageVersion() (gas: 8388)
+L1CrossDomainMessenger_Test:test_L1MessengerPause() (gas: 31860)
+L1CrossDomainMessenger_Test:test_L1MessengerRelayMessageSucceeds() (gas: 61261)
+L1CrossDomainMessenger_Test:test_L1MessengerRelayMessageToSystemContract() (gas: 44881)
+L1CrossDomainMessenger_Test:test_L1MessengerRelayShouldRevertIfPaused() (gas: 41587)
+L1CrossDomainMessenger_Test:test_L1MessengerSendMessage() (gas: 172193)
+L1CrossDomainMessenger_Test:test_L1MessengerTwiceSendMessage() (gas: 1254199)
+L1CrossDomainMessenger_Test:test_L1MessengerUnpause() (gas: 23804)
+L1CrossDomainMessenger_Test:test_L1MessengerXDomainSenderReverts() (gas: 10599)
+L1CrossDomainMessenger_Test:test_L1MessengerxDomainMessageSenderResets() (gas: 58579)
+L1StandardBridge_Test:test_depositERC20() (gas: 452856)
+L1StandardBridge_Test:test_depositERC20To() (gas: 454632)
+L1StandardBridge_Test:test_depositETH() (gas: 247077)
+L1StandardBridge_Test:test_depositETHTo() (gas: 204961)
 L1StandardBridge_Test:test_finalizeERC20Withdrawal() (gas: 438752)
 L1StandardBridge_Test:test_finalizeETHWithdrawal() (gas: 48005)
 L1StandardBridge_Test:test_initialize() (gas: 14885)
@@ -44,17 +46,17 @@ L1StandardBridge_Test:test_onlyEOADepositERC20() (gas: 12085)
 L1StandardBridge_Test:test_onlyEOADepositETH() (gas: 30637)
 L1StandardBridge_Test:test_onlyL2BridgeFinalizeERC20Withdrawal() (gas: 23565)
 L1StandardBridge_Test:test_onlyPortalFinalizeERC20Withdrawal() (gas: 22919)
-L1StandardBridge_Test:test_receive() (gas: 391794)
+L1StandardBridge_Test:test_receive() (gas: 391817)
 L2CrossDomainMessenger_Test:testCannot_L2MessengerPause() (gas: 10843)
 L2CrossDomainMessenger_Test:test_L2MessengerMessageVersion() (gas: 8410)
 L2CrossDomainMessenger_Test:test_L2MessengerPause() (gas: 31837)
 L2CrossDomainMessenger_Test:test_L2MessengerRelayMessageSucceeds() (gas: 57538)
 L2CrossDomainMessenger_Test:test_L2MessengerRelayMessageToSystemContract() (gas: 24567)
 L2CrossDomainMessenger_Test:test_L2MessengerRelayShouldRevertIfPaused() (gas: 41599)
-L2CrossDomainMessenger_Test:test_L2MessengerSendMessage() (gas: 119659)
-L2CrossDomainMessenger_Test:test_L2MessengerTwiceSendMessage() (gas: 133096)
-L2CrossDomainMessenger_Test:test_L2MessengerXDomainSenderReverts() (gas: 10588)
-L2CrossDomainMessenger_Test:test_L2MessengerxDomainMessageSenderResets() (gas: 54859)
+L2CrossDomainMessenger_Test:test_L2MessengerSendMessage() (gas: 119682)
+L2CrossDomainMessenger_Test:test_L2MessengerTwiceSendMessage() (gas: 133142)
+L2CrossDomainMessenger_Test:test_L2MessengerXDomainSenderReverts() (gas: 10599)
+L2CrossDomainMessenger_Test:test_L2MessengerxDomainMessageSenderResets() (gas: 54881)
 L2OutputOracleTest:testCannot_appendEmptyOutput() (gas: 18442)
 L2OutputOracleTest:testCannot_appendFutureTimetamp() (gas: 20072)
 L2OutputOracleTest:testCannot_appendOnWrongFork() (gas: 20710)
@@ -70,14 +72,14 @@ L2OutputOracleTest:test_deleteL2Output() (gas: 66081)
 L2OutputOracleTest:test_getL2Output() (gas: 76274)
 L2OutputOracleTest:test_latestBlockNumber() (gas: 70075)
 L2OutputOracleTest:test_nextBlockNumber() (gas: 9279)
-L2StandardBridge_Test:test_ERC20BridgeFailed_whenLocalTokenIsBridge() (gas: 133074)
+L2StandardBridge_Test:test_ERC20BridgeFailed_whenLocalTokenIsBridge() (gas: 133097)
 L2StandardBridge_Test:test_cannotWithdrawEthWithoutSendingIt() (gas: 21611)
 L2StandardBridge_Test:test_finalizeDeposit() (gas: 93100)
-L2StandardBridge_Test:test_finalizeDeposit_failsToCompleteOutboundTransfer() (gas: 140106)
+L2StandardBridge_Test:test_finalizeDeposit_failsToCompleteOutboundTransfer() (gas: 140129)
 L2StandardBridge_Test:test_initialize() (gas: 14856)
-L2StandardBridge_Test:test_receive() (gas: 136392)
-L2StandardBridge_Test:test_withdraw() (gas: 352742)
-L2StandardBridge_Test:test_withdrawTo() (gas: 353463)
+L2StandardBridge_Test:test_receive() (gas: 136415)
+L2StandardBridge_Test:test_withdraw() (gas: 352760)
+L2StandardBridge_Test:test_withdrawTo() (gas: 353481)
 L2StandardBridge_Test:test_withdraw_onlyEOA() (gas: 251970)
 L2ToL1MessagePasserTest:test_burn() (gas: 112046)
 L2ToL1MessagePasserTest:test_initiateWithdrawal_fromContract() (gas: 67890)
@@ -164,4 +166,4 @@ SequencerFeeVault_Test:test_constructor() (gas: 7611)
 SequencerFeeVault_Test:test_minWithdrawalAmount() (gas: 5429)
 SequencerFeeVault_Test:test_receive() (gas: 17280)
 SequencerFeeVault_Test:test_revertWithdraw() (gas: 9266)
-SequencerFeeVault_Test:test_withdraw() (gas: 147278)
+SequencerFeeVault_Test:test_withdraw() (gas: 147301)

packages/contracts-bedrock/contracts/test/L1CrossDomainMessenger.t.sol

@@ -42,6 +42,21 @@ contract L1CrossDomainMessenger_Test is Messenger_Initializer {
         L1Messenger.pause();
     }
 
+    // unpause: should unpause the contract when called by the current owner
+    function test_L1MessengerUnpause() external {
+        L1Messenger.pause();
+        assert(L1Messenger.paused());
+        L1Messenger.unpause();
+        assert(!L1Messenger.paused());
+    }
+
+    // unpause: should not unpause the contract when called by account other than the owner
+    function testCannot_L1MessengerUnpause() external {
+        vm.expectRevert("Ownable: caller is not the owner");
+        vm.prank(address(0xABBA));
+        L1Messenger.unpause();
+    }
+
     // the version is encoded in the nonce
     function test_L1MessengerMessageVersion() external {
         assertEq(

packages/contracts-bedrock/contracts/universal/CrossDomainMessenger.sol

@@ -101,6 +101,13 @@ abstract contract CrossDomainMessenger is
         _pause();
     }
 
+    /**
+     * Unpause relaying.
+     */
+    function unpause() external onlyOwner {
+        _unpause();
+    }
+
     /**
      * Retrieves the address of the x-domain message sender. Will throw an error
      * if the sender is not currently set (equal to the default sender).