    function suspendMessages(
        bytes32[] calldata _msgHashes,
        bool _suspend
    )
        external
        onlyFromOwnerOrNamed("bridge_watchdog")
    {
        uint64 _timestamp = _suspend ? type(uint64).max : uint64(block.timestamp);
        for (uint256 i; i < _msgHashes.length; ++i) {
            bytes32 msgHash = _msgHashes[i];
            proofReceipt[msgHash].receivedAt = _timestamp;
            emit MessageSuspended(msgHash, _suspend);
        }
    }
        uint64 receivedAt = proofReceipt[msgHash].receivedAt;
        bool isMessageProven = receivedAt != 0
register(
+address(addressManager), "signal_service", address(signalService), destChainId 
-address(addressManager), "signal_service", address(mockProofSignalService), destChainId 
);
    function suspendMessages(
        bytes32[] calldata _msgHashes,
        bool _suspend
    )
        external
        onlyFromOwnerOrNamed("bridge_watchdog")
    {
+       uint64 _timestamp = _suspend ? type(uint64).max : 0;
        for (uint256 i; i < _msgHashes.length; ++i) {
            bytes32 msgHash = _msgHashes[i];
            proofReceipt[msgHash].receivedAt = _timestamp;
            emit MessageSuspended(msgHash, _suspend);
        }
    }
