sns-publish.js

const express = require('express')
const AWS = require("aws-sdk")
var bodyParser = require('body-parser')
const MessageValidator = require('sns-validator')

const config = {
    "SNS_TOPIC_ARN": "",
    "USER_ARN": "",
    "USER_ACCESS_KEY_ID": "",
    "USER_SECRET_ACCESS_KEY": "",
    "DLQ_ARN": "",
    "REGION": "region"
};

const app = express()
const port = 3040


app.use(
    express.json({
        type: [
            'application/json',
            'text/plain', // AWS sends this content-type for its messages/notifications
        ],
    })
)

// const credentials = new AWS.SharedIniFileCredentials({profile: 'sns_profile'});
const SNS = new AWS.SNS({
    credentials: {
        accessKeyId: config.USER_ACCESS_KEY_ID,
        secretAccessKey: config.USER_SECRET_ACCESS_KEY,
    },
    region: config.REGION
})

const Dynamodb = new AWS.DynamoDB({
    credentials: {
        accessKeyId: config.USER_ACCESS_KEY_ID,
        secretAccessKey: config.USER_SECRET_ACCESS_KEY,
    },
    region: config.REGION
})

const message = {
    "_id": "617283d4f1d213b4adc38468",
    "guid": "5a821ffb-6fd5-446b-aeb7-0341b50afc3c",
    "age": 31,
    "name": "Adriana Banks",
    "company": "MOLTONIC",
    "email": "adrianabanks@moltonic.com",
}

app.get('/', (req, res) => {
    res.send({ response: 'Hello World! - SNS publisher service' })
})

// Endpoint used to publish message to SNS topic
app.post('/publish', async (req, res) => {
    let params = {
        TopicArn: config.SNS_TOPIC_ARN,
        Message: JSON.stringify(message),
    };

    const publishTextPromise = SNS.publish(params).promise();
    publishTextPromise.then(async data => {
        console.log(`Message ${params.Message} sent to the topic ${params.TopicArn}`);
        console.log("MessageID is " + data.MessageId);

        // save to dynamoDB
        await Dynamodb.putItem({
            TableName: 'test-billing-order-sending-table',
            Item: {
                'entity_id': { S: message._id },
                'guid': { S: message.guid },
                'name': { S: message.name },
                'company': { S: message.company },
                'email': { S: message.email },
                'age': { S: `${message.age}` },
                'state': { S: 'success' },
            }
        }).promise();
    
        res.send("message published")
    }).catch(err => {
        console.error(err, err.stack);
    });
});




app.listen(port, () => {
    console.log(`Example app listening at http://localhost:${port}`)
})