AWS SNS to SQS publish fails using Cloudformation - amazon-web-services

Question

I've recently started learning and implementing services using AWS services. So, I guess I'm missing some small steps which I can't figure it.
I'm trying to implement the following diagram using the Cloudformation template. Everything is working fine unless. The Lambda and SQS queue are subscribed to the SNS topic successfully. Whenever a file is stored at the bucket, or even when I publish a message to the SNS topic manually, the lambda function is triggered successfully, but the message is not published to the SQS queue. I've also added the AWS::SQS::QueuePolicy to allow SNS to send messages to SQS, but it still does not work.
template.yml:
...
Resources:
S3ObjectPutTopic:
Type: AWS::SNS::Topic
Properties:
TopicName: !Sub ${AppName}-vrp-creation-${Environment}-topic
BucketToSNSPermission:
Type: AWS::SNS::TopicPolicy
...
Bucket:
Type: AWS::S3::Bucket
...
Lambda:
Type: AWS::Serverless::Function
...
Queue:
Type: AWS::SQS::Queue
Properties:
DelaySeconds: 0
MaximumMessageSize: 262144
MessageRetentionPeriod: 864000
QueueName: !Sub ${AppName}-${Environment}-queue
ReceiveMessageWaitTimeSeconds: 0
VisibilityTimeout: 90
TopicToQueuePermission:
Type: AWS::SQS::QueuePolicy
Properties:
Queues:
- !Ref Queue
PolicyDocument:
Version: 2012-10-17
Statement:
- Effect: Allow
Principal:
Service: s3.amazonaws.com
Action: sqs:SendMessage
Resource: !GetAtt Queue.Arn
Condition:
ArnEquals:
aws:SourceArn: !Ref S3ObjectPutTopic
TopicToQueueSubscription:
Type: AWS::SNS::Subscription
Properties:
Protocol: sqs
TopicArn: !Ref S3ObjectPutTopic
Endpoint: !GetAtt Queue.Arn
RawMessageDelivery: true
The full Cloudformation template.yaml file: template.yaml

Answer 1

You have mentioned Service: s3.amazonaws.com instead of Service: sns.amazonaws.com in your SQS policy. Update the template and try.
TopicToQueuePermission:
Type: AWS::SQS::QueuePolicy
Properties:
Queues:
- !Ref Queue
PolicyDocument:
Version: 2012-10-17
Statement:
- Effect: Allow
Principal:
Service: s3.amazonaws.com
Action: sqs:SendMessage
Resource: !GetAtt Queue.Arn
Condition:
ArnEquals:
aws:SourceArn: !Ref S3ObjectPutTopic