Blockchain for Python Developers

1. Blockchain for Python
Developers
Juarez Junior
Azure Developer Engagement Lead
Microsoft
juarez.junior@microsoft.com Twitter/Medium: @juarezjunior linkedin.com/in/jujunior

3. Blockchain technology
What is blockchain?
Common scenarios

4. The ledger can only be updated by
network consensus, and information can’t
be altered or deleted without the
knowledge of the whole network
Everyone in the network has an individual,
identical copy
Data is stored in a ledger—
a record of every transaction
Blockchain streamlines these processes by establishing
a secure, shared source of truth

5. Blockchain Networks
Consortium
Woodgrove
Financial
Contoso
Bank
Northwind
Traders
Bank b
Insurance c
Investment
consortium
c
Bank A
Blockchain
Location 1
Location 2
Location 3
Location 4
Department
A
Department
B
Public
blockchain
Person a
Woodgrove
Financial
Person B
Northwind
Traders
Bank 6
Bank 1
Consortium
6
Public
(permissionless)
Consortium
(permissioned)
Private
• Many, unknown participants
• Writes by all participants
• Reads by all participants
• Consensus by Proof of Work
• Known participants from one org
• Write permissions centralized
• Reads may be public or restricted
• Multiple algorithms for consensus
• Known participants from multiple orgs
• Writes require consensus of n participants
• Reads may be public or restricted
• Multiple algorithms for consensus

6. Corda
Chain
Enterprise
Ethereum Quorum
Permissionless and Permissioned

7. Transactions, Hashes and Blocks
GENESIS BLOCK
(must be the root for all on the same chain)
Transaction 0
Transaction 1
Transaction 2
Transaction 3
Transaction 4
New Hash
+
Block0 Hash
First Hash
New Hash
+
Block1 Hash
New Hash
+
Block2 Hash
0 seconds ~12 seconds ~24 seconds ~36 seconds

9. Blockchain has broad applications across industries
Loyalty tracking
Product provenance
Logistics management
Digital rewards
P2P selling
Ticket purchases
Asset tracking
Real-time auction for
supplier contracts
Supply chain
transparency
Dynamic commodities
pricing
Claims management
MBS/Property payments
Fraud detection
Automated underwriting
Risk visualizations
Licensing and ID
Benefits distribution
Aid tracking
Military security
Copyrights
Audit compliance
Bond issuance
Trade finance
Loan syndication
Post trade settlement
Global payments
Derivatives trading
KYC/AML
Personalized medicine
Records sharing
Compliance
Agricultural
authentication
Pharmaceutical purity
Manufacturing Retail Insurance Government
Banking and
Capital Markets
Health

11. Hyperledger Fabric Blockchain
• Permissioned, Enterprise
• Hyperledger Fabric – open-source protocol for distributed ledger solutions
– Provides a permissioned blockchain model with membership services
– Offers a modular architecture allowing components, such as consensus and membership
services
– Enables pluggable data store, consensus protocols, and multiple providers of membership
services
– Programmable – leverages containers to host smart contracts
– Focuses on a permissioned implementation with confidentiality/privacy provisions
– No crypto required
• Hosted by The Linux Foundation
– Same governance model
– Other projects as part of Hyperledger Foundation ecosystem (Indy, Iroha, Sawtooth)
HYPERLEDGER FABRIC BY HYPERLEDGER FOUNDATION

12. Hyperledger Fabric Blockchain
HYPERLEDGER FABRIC BY HYPERLEDGER FOUNDATION

14. Hyperledger Fabric – Transaction Flow
HYPERLEDGER FABRIC BY HYPERLEDGER FOUNDATION
Client Application
Fabric SDK
Keys
Membership Service
Peers
Endorser
Simulates TX
World
State
Committer
Effect changes
Ordering Service
Certificate
Authority
Federated
Identity
4.0 - Deliver TX Batch
Validate Signatures
and Authorization
Membership
Services container
Peer container
Orderer container
Orders TXs into
batches
according to
consensus
Container
Legend
Dev Code
3.0 - Submit Endorsed TX
Includes RWset and endorser
signatures
Ledger
5.0 – Writes ledger block
5.1 - Updates State
6.0 – Commit Notification
Fabric Code
Smart contract container
Smart Contract
(Chaincode)

16. Fabric-SDK-Py
https://github.com/hyperledger/fabric-sdk-py
https://fabric-sdk-
py.readthedocs.io/en/latest/tutorial.html
GitHub
HYPERLEDGER FABRIC PYTHON SDK

19. Hyperledger Blockchain
Smart Contracts
Python Clients
HYPERLEDGER FABRIC BY HYPERLEDGER FOUNDATION

20. Hyperledger on Azure with Azure
Kubernetes Service
https://medium.com/@juarezjunior/how-to-deploy-
your-first-hyperledger-fabric-components-with-
azure-kubernetes-service-aks-760563d9d543
Marketplace
GitHub
HYPERLEDGER FABRIC BY HYPERLEDGER FOUNDATION

21. Quorum Blockchain
CONSENSYS QUORUM

22. Quorum Blockchain on Azure
Create a Blockchain consortium member
Deploy a smart contract with VS Code
Interact with your smart contract
Quorum via a full 7 node
network on a single VM
Examples
CONSENSYS QUORUM

23. Corda – Languages and Tools
CORDA BY R3

24. Corda on Azure + Code Samples
Corda on Azure — How to deploy and run a demo
Corda network
Corda on Azure — Deploying a Corda Testnet node
Java
Kotlin
CORDA BY R3

25.  In the spirit of community, we will inspire our developers to build
on Azure and increase their skills across Azure services
 To achieve this we created something both unique and scarce with
badge designs that have been tokenised into a fixed supply
digital asset
What is Azure Heroes?

27. Transform your business with blockchain on Azure
Create smarter and more efficient processes with Azure blockchain offerings
Azure Blockchain
Service
Azure Blockchain
Workbench
Azure Blockchain
Developer Kit
Build, govern, and
expand consortium
blockchain
networks
Easily prototype
blockchain apps in
the cloud
Connect and integrate to
existing apps and move
to production

28. Azure Blockchain Development Kit
AZURE BLOCKCHAIN DEVELOPER EXPERIENCE

29. End-to-end Github examples that help connect and
integrate blockchain with existing apps
AZURE BLOCKCHAIN DEVELOPER EXPERIENCE

31. Azure is the best cloud for Blockchain
Ahead of the
competition
An open, app-focused
approach validated by
Gartner, Forrester and
many other third-party
analysts
Thoughtful product
portfolio
The most open and
comprehensive blockchain
portfolio to simplify
development of this new
class of applications
Trusted by customers
and partners
Businesses have built
thousands of blockchain
apps on Azure working
with our rich ecosystem of
blockchain partners ​

32. Azure Blockchain
AZURE BLOCKCHAIN

33. Streamline Blockchain app development
AZURE BLOCKCHAIN
Xamarin
IoT Hub
Gateway Service
API
Transaction Builder +
Signer
Azure Key Vault
Azure SQL database
Storage (Azure
Ethereum Router
Quorum Router Azure
Blockchain
Service
DLT
Watcher
Event
Grid
iOS App
Android App
Ethereum

34. Simple Blockchain governance / management
AZURE BLOCKCHAIN SERVICE

35. © Copyright Microsoft Corporation. All rights reserved.
Thank You and Q&A!

36. Blockchain for Python Developers
Scan this QR-code to access free educational
resources, step-by-step learning guides as well as
get practical experience in Blockchain!
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