Utility to query Snaps for conditions.

.eslintrc.js

@@ -10,7 +10,7 @@ module.exports = {
     },
 
     {
-      files: ['*.js', 'scripts/*.ts'],
+      files: ['*.js', 'scripts/**/*.ts'],
       parserOptions: {
         sourceType: 'script',
       },

.gitignore

@@ -81,3 +81,5 @@ node_modules/
 src/signature.json
 
 secp256k1-key
+
+scripts/query/data.json

package.json

@@ -22,6 +22,7 @@
     "lint:fix": "yarn lint:eslint --fix && yarn lint:misc --write",
     "lint:misc": "prettier '**/*.json' '**/*.md' '!CHANGELOG.md' '**/*.yml' '!.yarnrc.yml' --ignore-path .gitignore --no-error-on-unmatched-pattern",
     "prepack": "./scripts/prepack.sh",
+    "query-snaps": "ts-node scripts/query/query.ts",
     "sign": "ts-node scripts/sign-registry.ts",
     "test": "jest && jest-it-up",
     "test:watch": "jest --watch",

scripts/query/get-manifests.ts

@@ -0,0 +1,43 @@
+import { detectSnapLocation, fetchSnap } from '@metamask/snaps-controllers';
+import type { SnapId } from '@metamask/snaps-sdk';
+import type { SemVerRange } from '@metamask/utils';
+import fs from 'fs';
+import path from 'path';
+import semver from 'semver/preload';
+
+import registry from '../../src/registry.json';
+
+export const MANIFESTS_FILE_LOCATION = path.join(__dirname, 'data.json');
+
+/**
+ * Function to fetch Snaps manifests and write it to a local JSON file.
+ */
+export async function getManifests() {
+  console.log('Fetching Snaps. Please wait ...');
+  const allManifests = [];
+  for (const snap of Object.values(registry.verifiedSnaps)) {
+    console.log(snap.metadata.name);
+    const latestVersion = Object.keys(snap.versions).reduce(
+      (result, version) => {
+        if (result === null || semver.gt(version, result)) {
+          return version;
+        }
+        return result;
+      },
+    ) as SemVerRange;
+
+    const location = detectSnapLocation(snap.id, {
+      versionRange: latestVersion,
+    });
+
+    const fetchedSnap = await fetchSnap(snap.id as SnapId, location);
+    allManifests.push(fetchedSnap.manifest.result);
+  }
+
+  await fs.promises.writeFile(
+    MANIFESTS_FILE_LOCATION,
+    JSON.stringify(allManifests),
+  );
+
+  console.log('Fetching Snap manifests and writing file - Done');
+}

scripts/query/query.ts

@@ -0,0 +1,41 @@
+import type { SnapManifest } from '@metamask/snaps-utils';
+import fsPromises from 'fs/promises';
+
+import { MANIFESTS_FILE_LOCATION, getManifests } from './get-manifests';
+
+/**
+ * Entry point.
+ */
+async function main() {
+  const forceDownload = process.argv.includes('--force-download');
+  if (forceDownload) {
+    await getManifests();
+  } else {
+    try {
+      //  Check if local file exists.
+      await fsPromises.readFile(MANIFESTS_FILE_LOCATION, 'utf8');
+    } catch (eror) {
+      await getManifests();
+    }
+  }
+
+  const manifests: SnapManifest[] = JSON.parse(
+    await fsPromises.readFile(MANIFESTS_FILE_LOCATION, 'utf8'),
+  );
+
+  /**
+   * Write your custom code to query the `manifests` array for the data you are interested in.
+   */
+
+  //  Eg.: Find all Snaps that use `endowment:transaction-insight`
+  const filteredSnaps = manifests.filter(
+    (manifest) => manifest.initialPermissions['endowment:transaction-insight'],
+  );
+  console.log('\nQuery results');
+  console.log(filteredSnaps.map((snap) => snap.proposedName));
+}
+
+main().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});