cannot get aws lambda to send sms via aws sns - amazon-web-services

Question

I have copied the example in the various guides on the internet, including the fairly recent topic on SO:
How to send SMS using Amazon SNS from a AWS lambda function
I've implemented successfully the code from https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/sns-examples-sending-sms.html on my local nodejs server, however when i do the same on Lambda nothing happens, not even console.log???
This is the code i am using in Lambda:
const AWS = require('aws-sdk');
exports.handler = async (event) => {
AWS.config.update({region: 'eu-west-2'});
var params = {
Message: 'TEXT_MESSAGE', /* required */
PhoneNumber: '+1346879',
};
// Create promise and SNS service object
var publishTextPromise = new AWS.SNS({apiVersion: '2010-03-31'}).publish(params).promise();
// Handle promise's fulfilled/rejected states
publishTextPromise.then(
function(data) {
console.log("MessageID is " + data.MessageId);
const response = {
statusCode: 200,
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify(data)
};
console.log('Server response function');
return response;
}).catch(
function(error) {
//console.error(err, err.stack);
const response = {
statusCode: 500,
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify({error: 'Internal server error', message: error})
};
return response;
});
}
Needless to say i tried various flavours of what seems to be an elementary piece of code...
Logs say exactly this:
2020-10-29T00:29:21.820+00:00 START RequestId: 8dbaedac-1f98-4319-9ac5-acba1d8860c5 Version: $LATEST
2020-10-29T00:29:22.242+00:00 Lambda Insights extension initializing.
2020-10-29T00:29:22.242+00:00 EXTENSION Name: cloudwatch_lambda_agent State: Ready Events: [INVOKE,SHUTDOWN]
2020-10-29T00:29:22.838+00:00 END RequestId: 8dbaedac-1f98-4319-9ac5-acba1d8860c5
2020-10-29T00:29:22.838+00:00
Copy
REPORT RequestId: 8dbaedac-1f98-4319-9ac5-acba1d8860c5 Duration: 594.62 ms Billed Duration: 600 ms Memory Size: 128 MB Max Memory Used: 99 MB Init Duration: 448.90 ms
REPORT RequestId: 8dbaedac-1f98-4319-9ac5-acba1d8860c5 Duration: 594.62 ms Billed Duration: 600 ms Memory Size: 128 MB Max Memory Used: 99 MB Init Duration: 448.90 ms
I have set permissions in the same exact way both on my user and on lambda:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": "sns:*",
"Resource": "*"
}
]
}
Any thought?

Answer 1

I think that you have to return a promise to ensure all the tasks will be executed till the end.
If your code performs an asynchronous task, return a promise to make sure that it finishes running. When you resolve or reject the promise, Lambda sends the response or error to the invoker.
const AWS = require('aws-sdk');
exports.handler = async (event) => {
AWS.config.update({region: 'eu-west-2'});
var params = {
Message: 'TEXT_MESSAGE', /* required */
PhoneNumber: '+1346879',
};
// Create promise and SNS service object
var publishTextPromise = new AWS.SNS({apiVersion: '2010-03-31'}).publish(params).promise();
return new Promise((resolve, reject) => {
// Handle promise's fulfilled/rejected states
publishTextPromise.then((data) => {
console.log("MessageID is " + data.MessageId);
const response = {
statusCode: 200,
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify(data)
};
console.log('Server response function');
resolve(response);
}).catch((error) => { reject(Error(error)); });
});
}

Answer 2

Check the lambda execution time, try to increase it to 15 mins.
This SNS is having two types of messages 1.Promotional 2.Transactional
By default it choose promotional. If end users is having DND enabled to his number. Then your message will not delivered.
If it is related to transactional use the below object for sending transactional messages.
{
Message: 'Message',
PhoneNumber: '+XXX',
MessageAttributes: {
'AWS.SNS.SMS.SMSType': {
DataType: 'String',
StringValue: 'Transactional'
}
}