Fix "TypeError: AWS.LexRuntimeV2 is not a constructor" when using Lex…

… V2 based Elicit Response Bots. Fix "Cannot read property 'buttons' of undefined" when no buttons specified in response card. Bug fix - protect against TypeError exception while processing fallback intent case for an invalid response provided to a LexV2 Response Bot.

CHANGELOG.md

@@ -1,3 +1,7 @@
+## [4.7.2]
+- Bug fix "TypeError: AWS.LexRuntimeV2 is not a constructor" when using Lex V2 based Elicit Response Bots.
+- Bug fix "Cannot read property 'buttons' of undefined" when no buttons specified in response card.
+- Bug fix Protect against TypeError exception while processing fallback intent case for an invalid response provided to a LexV2 Response Bot. 
 ## [4.7.1]
 - Amazon Elasticsearch version 7.10 is now utilized.
 - Encrypted Elasticsearch (production) instance types now use m6g.large.elasticsearch for improved price/performance/memory.

lambda/fulfillment/Makefile

@@ -3,4 +3,4 @@ DST=../../build/lambda/$(NAME).zip
 RESOURCES := $(shell  find . | grep -v node_modules | grep -v test )
 
 $(DST): $(RESOURCES) 
-	echo "Building $(NAME)"; npm install -production && zip -r -q $(DST) .
+	echo "Building $(NAME)"; rm $(DST); npm install -production && zip -r -q $(DST) .

lambda/fulfillment/lib/middleware/lexRouter.js

@@ -79,6 +79,7 @@ function lexV1ClientRequester(params) {
     });
 }
 function lexV2ClientRequester(params) {
+    console.log(`aws sdk version is ${AWS.VERSION}`);
     const lexV2Client = new AWS.LexRuntimeV2();
     return new Promise(function(resolve, reject) {
         lexV2Client.recognizeText(params, function(err, data) {
@@ -319,4 +320,4 @@ async function processResponse(req, res, hook, msg) {
     return resp;
 }
 
-exports.elicitResponse=processResponse;
+exports.elicitResponse=processResponse;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "aws-ai-qna-bot",
-  "version": "4.7.1",
+  "version": "4.7.2",
   "engines": {
     "node": ">=12.16.1",
     "npm": ">=7.8.0"