AWS | Publish SNS from Lambda

directly_from_sns_client.js

const { SNSClient, PublishCommand } = require("@aws-sdk/client-sns"); // This requires a Lambda Layer to be installed

exports.handler = async (event) => {
    var eventText = JSON.stringify(event, null, 2);
    
    var client = new SNSClient({region: process.env.REGION});
    
    var params = {
        Message: eventText, 
        Subject: "Test SNS From Lambda",
        TopicArn: process.env.SNS_TOPIC_ARN
    };
    
    await client.send(new PublishCommand(params))
    
    var response = {
        statusCode: 200,
        body: JSON.stringify('Hello from Lambda!'),
    };
    
    return response;
};

from_aws_sdk.js

var AWS = require("aws-sdk");

AWS.config.region = process.env.REGION;

exports.handler = async (event, context) => {
    var eventText = JSON.stringify(event, null, 2);
    
    var sns = new AWS.SNS();
    
    var params = {
        Message: eventText, 
        Subject: "Test SNS From Lambda",
        TopicArn: process.env.SNS_TOPIC_ARN
    };
    
    try {
        await sns.publish(params, (err, data) => {
            if (data) {
                console.log('Success', data);
            } else {
                console.log('Error', err)
            }
        }).promise();
    } catch (e) {
        console.log('Try...catch error', e.stack);
        
        return;
    }
    
    const response = {
        statusCode: 200,
        body: JSON.stringify('Hello from Lambda!'),
    };
    
    return response;
};