AWS IoT+ Lambda to power a blockchain project

Transcription

1 AWS IoT+ Lambda to power a blockchain project June 2016 by Johann Romefort

2 About Johann Tech 15+ years in tech In Germany for 2 years 7 years in San Francisco doing startups Organizer of many meetups 2

3 Agenda Overview of the project & constraints Configure your AWS IoT Button Introduction to AWS IoT The MQTT Client Connecting it to Lambda 3

4 Technologies involved AWS IoT Lambda SQS Node.JS Ethereum 4

5 Overview of the project Creation of a digital certificate of attendance on the blockchain Minimal UI and input mechanism Scan ticket, Press button and done! 5

6 Project Diagram: feet overview 6

7 Project Diagram: 5000 feet overview writetoblockchain scanticket getorder 2 3 generatecertificate 7

8 Project Constraints Should run on local computer with no access possible from outside No access to keyboard or touch screen Certificate should be easy to verify, impossible to fake, permanent Serverless 8

9 The Live Setup MacBook Pro running local blockchain node AWS IoT button for user input

10 What is Blockchain? Blockchain is the technology behind Bitcoin Bitcoin was created in 2008 by Satoshi Nakamoto Blockchain is literally a chain of blocks. A blockchain is immutable no one can change the data once it s been written on the chain.

11 What is Blockchain?

12 What can I do with an immutable distributed ledger? Cryptocurrencies Property titles Notarised acts Digital Certificates And more

13 Why AWS IoT, Button and Lambda + SQS? Simpler input command / device one can think about Very simple setup Communication with SQS allows for a simple client running inside a firewall and subscribing to a queue topic in the cloud 13

14 AWS IoT Button Programmable version of the Dash Button Easy Wifi configuration Connect directly to AWS IoT Interactions: Normal press Long press Double press 14

15 Configure your AWS IoT Button 15

16 Connect to button WIFI network 16

17 Introduction to AWS IoT Serverless way to connect your IoT devices and start processing data Supports MQTT, HTTP Secure - communication through use of X.509 Certificates Can connect huge amount of sensors, store and process the data in real-time 17

18 AWS IoT Architecture source: 18

19 Source:

20 What s a Thing? An IoT Device Eg: Intel Edison, Arduino Yun + sensors / actuators In our case an AWS IoT button 20

21 What s the Message Broker? Used to securely exchange messages following the publishsubscribe pattern, between IoT applications and Things. MQTT to publish/subscribe HTTP to publish 21

22 What s the Rule Engine? Used to process messages and talk to other AWS components like Lambda, DynamoDB, etc SQL-Based language to select specific messages to be passed along. 22

23 What are Thing Shadows? Devices sometimes go offline A Thing Shadow provide a persistent representation of a Thing A Thing can sync its state to its Thing Shadow 23

24 AWS IoT Console 24

25 Let s look at the MQTT Client Message Queue Telemetry Transport A lightweight publish-subscribe messaging protocol for small sensors and mobile devices, optimized for high-latency or unreliable networks 25

26 MQTT Client Generate ClientID Subscribe to topic iotbutton/+ Press the button Watch event flowing 26

27 Don t have a AWS IoT Button? Just use the MQTT Client to simulate a payload 27

28 What do we want to do? Use the button as input device to validate the transaction on the blockchain - Writing the transaction is a permanent operation, certificate will be available forever. Send a SQS message to a topic our client is listening to. 28

29 Create your SQS Queue 29

30 Writing the Lambda 30

31 Configure the Policy Document { } "Version": " ", "Statement": [ { "Effect": "Allow", "Action": [ "logs:createloggroup", "logs:createlogstream", "logs:putlogevents" ], "Resource": "arn:aws:logs:*:*:*" }, { "Action": [ "sqs:sendmessage", "sqs:getqueueurl" ], "Effect": "Allow", "Resource": "arn:aws:sqs:us-west-2: :buttonpressed" } ] 31

32 Testing our Lambda Write client code to listen to SQS Use either AWS IoT Button or MQTT to test the whole chain 32

33 Testing our Lambda

34 Going further We don t need lambda! We can use SQS directly from AWS IoT Rule Engine 34

35 Questions? Follow me on Check our blog: tech.stylight.com