How can I publish a message to an Amazon SNS topic using a Lambda function?
I want to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic from an AWS Lambda function.
"I want to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic from an AWS Lambda function.ResolutionFollow these steps to send a message to an Amazon SNS topic using a Lambda function.Note: The example in this article uses a Python runtime, but you can use your preferred Lambda runtimes.1.    Create an Amazon SNS topic.2.    Create a Lambda function.3.    From the Lambda function, make sure that the Lambda execution role has permissions to publish the SNS message similar to the following:Note: Replace your-region, your-account-number, and your-topic-name with your variables.{  "Version": "2012-10-17",  "Statement": [    {      "Sid": "PublishSNSMessage",      "Effect": "Allow",      "Action": "sns:Publish",      "Resource": "arn:aws:sns:<your-region>:<your-account-number>:<your-topic-name>"    }  ]}4.     Choose the Code tab. Then, in Code source, copy and paste the following code for the Publish Boto3 action into the code editor:import jsonimport boto3client = boto3.client('sns')def lambda_handler(event, context):   response = client.publish(TopicArn='arn:aws:sns:<region>:<account-number>:<topic-name>',Message="Test message")   print("Message published")   return(response)5.    Test your Lambda function.If your Lambda function is connected to an Amazon Virtual Private Cloud (Amazon VPC), then do one of the following:If your Lambda function requires internet access, make sure that you grant internet access. For more information, see How do I give internet access to a Lambda function that's connected to an Amazon VPC?-or-For private networks, create an Amazon VPC endpoint for Amazon SNS in the same VPC. For more information, see Creating an Amazon VPC endpoint for Amazon SNS.Related informationWhy do I get an authorization error when I try to subscribe my Lambda function to my Amazon SNS topic?Follow"