build: offload hash checking logic to lambda worker during release (#29096)

script/release/get-url-hash.js

@@ -0,0 +1,31 @@
+const AWS = require('aws-sdk');
+
+const lambda = new AWS.Lambda({
+  credentials: {
+    accessKeyId: process.env.AWS_LAMBDA_EXECUTE_KEY,
+    secretAccessKey: process.env.AWS_LAMBDA_EXECUTE_SECRET
+  },
+  region: 'us-east-1'
+});
+
+module.exports = function getUrlHash (targetUrl, algorithm = 'sha256') {
+  return new Promise((resolve, reject) => {
+    lambda.invoke({
+      FunctionName: 'hasher',
+      Payload: JSON.stringify({
+        targetUrl,
+        algorithm
+      })
+    }, (err, data) => {
+      if (err) return reject(err);
+      try {
+        const response = JSON.parse(data.Payload);
+        if (response.statusCode !== 200) return reject(new Error('non-200 status code received from hasher function'));
+        if (!response.hash) return reject(new Error('Successful lambda call but failed to get valid hash'));
+        resolve(response.hash);
+      } catch (err) {
+        return reject(err);
+      }
+    });
+  });
+};