Metadata Health Checks (#3030)

### Description

- Create test to ensure SDK metadata RPCs and Explorers are healthy
- Exercise explorer link utils 
- Enable `sort-keys` eslint rule for SDK metadata
- Cleanup metadata and remove unhealthy RPC urls
- Remove NeutronTestnet

### Related issues

Fixes #2997

### Backward compatibility

Yes

.changeset/wise-mangos-crash.md

@@ -0,0 +1,5 @@
+---
+'@hyperlane-xyz/sdk': patch
+---
+
+Remove healthy RPC URLs and remove NeutronTestnet

.github/workflows/test.yml

@@ -128,6 +128,34 @@ jobs:
       - name: Unit Tests
         run: yarn test
 
+  metadata-check:
+    runs-on: ubuntu-latest
+    needs: [yarn-build]
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: recursive
+          fetch-depth: 0
+
+      - name: yarn-cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            **/node_modules
+            .yarn
+          key: ${{ runner.os }}-yarn-cache-${{ hashFiles('./yarn.lock') }}
+
+      - name: build-cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ./*
+            !./rust
+          key: ${{ github.sha }}
+
+      - name: Metadata Health Check
+        run: yarn workspace @hyperlane-xyz/sdk run test:metadata
+
   e2e:
     runs-on: larger-runner
     needs: [yarn-build]

typescript/infra/config/environments/testnet4/agent.ts

@@ -112,7 +112,7 @@ const neutron: RootAgentConfig = {
   context: Contexts.Neutron,
   rolesWithKeys: [Role.Relayer],
   contextChainNames: {
-    relayer: [Chains.neutrontestnet, Chains.goerli],
+    relayer: [Chains.goerli],
     validator: [],
     scraper: [],
   },

typescript/infra/config/environments/testnet4/validators.ts

@@ -323,21 +323,5 @@ export const validatorChainConfig = (
     //     'solanadevnet',
     //   ),
     // },
-    neutrontestnet: {
-      interval: 5,
-      reorgPeriod: chainMetadata.neutrontestnet.blocks!.reorgPeriod!,
-      validators: validatorsConfig(
-        {
-          [Contexts.Hyperlane]: [
-            '0x5d2a99d67cd294a821de4fb25da6901ea8f89814',
-            '0xb57486243ce3bb3c38c50a582b8bbd20cb393589',
-            '0x661faee997654d14ead4ae48035883f05c3150cf',
-          ],
-          [Contexts.ReleaseCandidate]: [],
-          [Contexts.Neutron]: [],
-        },
-        'neutrontestnet',
-      ),
-    },
   };
 };

typescript/infra/scripts/check-rpc-urls.ts

@@ -6,6 +6,8 @@ import { getSecretRpcEndpoint } from '../src/agents';
 
 import { getArgs, getEnvironmentConfig } from './utils';
 
+// TODO remove this script as part of migration to CLI
+// It's redundant with metadata-check.ts in the SDK
 async function main() {
   const { environment } = await getArgs().argv;
   const config = await getEnvironmentConfig(environment);

typescript/sdk/package.json

@@ -62,7 +62,8 @@
     "prettier": "prettier --write ./src",
     "test": "yarn test:unit && yarn test:hardhat",
     "test:unit": "mocha --config .mocharc.json './src/**/*.test.ts'",
-    "test:hardhat": "hardhat test $(find ./src -name \"*.hardhat-test.ts\")"
+    "test:hardhat": "hardhat test $(find ./src -name \"*.hardhat-test.ts\")",
+    "test:metadata": "ts-node ./src/test/metadata-check.ts"
   },
   "types": "dist/index.d.ts",
   "peerDependencies": {

typescript/sdk/src/consts/.eslintrc

@@ -0,0 +1,5 @@
+{
+  "rules": {
+    "sort-keys": ["error"]
+  }
+}