Merge pull request #809 from moonbeam-foundation/themacexpert/openzep

Open Zeppelin Defender V2 Tutorial

.snippets/code/builders/build/eth-api/dev-env/openzeppelin/PausableBox.sol

@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
+import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
+
+contract PausableBox is Initializable, PausableUpgradeable, OwnableUpgradeable {
+    uint256 private value;
+
+    // Emitted when the stored value changes
+    event ValueChanged(uint256 newValue);
+
+    // Initialize
+    function initialize() initializer public {
+        __Ownable_init(_msgSender());
+        __Pausable_init_unchained();
+    }
+
+    // Stores a new value in the contract
+    function store(uint256 newValue) whenNotPaused public {
+        value = newValue;
+        emit ValueChanged(newValue);
+    }
+
+    // Reads the last stored value
+    function retrieve() public view returns (uint256) {
+        return value;
+    }
+
+    function pause() public onlyOwner {
+        _pause();
+    }
+
+    function unpause() public onlyOwner {
+        _unpause();
+    }
+}