example ism

package.json

@@ -1,11 +1,13 @@
 {
-  "name": "@ethsign/",
+  "name": "@hyperlane-xyz/community",
   "version": "1.0.0",
-  "description": "",
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/EthSign"
-  },
+  "description": "A repository for community-contributions to Hyperlane protocol.",
+  "repository": "https://github.com/hyperlane-xyz/community-isms",
+  "license": "Apache-2.0",
+  "keywords": [
+    "Hyperlane",
+    "Solidity"
+  ],
   "scripts": {
     "prepare": "husky",
     "clean": "forge clean && hardhat clean && rm -rf cache_hardhat",
@@ -18,9 +20,8 @@
     "test:coverage": "forge coverage",
     "test:gas": "forge test --gas-report"
   },
-  "author": "",
-  "license": "ISC",
   "dependencies": {
+    "@hyperlane-xyz/core": "^5.8.0",
     "@openzeppelin/contracts": "5.0.2",
     "@openzeppelin/contracts-upgradeable": "5.0.2"
   },

remappings.txt

@@ -1,4 +1,5 @@
 @openzeppelin/contracts/=node_modules/@openzeppelin/contracts/
 @openzeppelin/contracts-upgradeable/=node_modules/@openzeppelin/contracts-upgradeable/
+@hyperlane-xyz/=node_modules/@hyperlane-xyz/core/
 ds-test/=node_modules/ds-test/src
 forge-std/=node_modules/forge-std/src

src/ExampleIsm.sol

@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity >=0.8.0;
+
+import { IInterchainSecurityModule } from "@hyperlane-xyz/contracts/interfaces/IInterchainSecurityModule.sol";
+
+contract ExampleIsm is IInterchainSecurityModule {
+    // @dev The first 128 enum values are reserved for core Hyperlane types
+    uint8 public constant COMMUNITY_MASK = 0x80;
+
+    // TODO: Replace with actual community types you want to use
+    enum CommunityTypes {
+        EXAMPLE_ISM
+    }
+
+    // @inheritdoc IInterchainSecurityModule
+    uint8 public moduleType = uint8(CommunityTypes.EXAMPLE_ISM) | COMMUNITY_MASK;
+
+    // @inheritdoc IInterchainSecurityModule
+    function verify(bytes calldata, bytes calldata) public view returns (bool) {
+        // TODO: Implement the verification logic for incoming messages and return true if the message is valid
+        // check AbstractMultisigIsm.sol for a reference implementation
+        return true;
+    }
+}

test/ExampleIsm.t.sol

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: MIT or Apache-2.0
+pragma solidity ^0.8.13;
+
+import { Test } from "forge-std/Test.sol";
+import { ExampleIsm } from "../src/ExampleIsm.sol";
+
+contract ExampleIsmTest is Test {
+    ExampleIsm public exampleIsm;
+    uint8 public constant EXAMPLE_ISM_TYPE = 128;
+
+    function setUp() public {
+        exampleIsm = new ExampleIsm();
+    }
+
+    function test_moduleType() public view {
+        assertEq(exampleIsm.moduleType(), EXAMPLE_ISM_TYPE);
+    }
+
+    // TODO: Implement the test for the verify function
+    function test_verify() public view {
+        assertTrue(exampleIsm.verify(abi.encode(""), abi.encode("")));
+    }
+}