2 2 pataricza andras-blockchain technologiák …...as 2805 series electronic funds transfers...

Budapest University of Technology and Economics

Dept. Measurement and Information Systems

Blockchain technologies

András PatariczaBudapest University of Technology and Economics

[email protected]



Gold digging then and now?2

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Bitcoin vs. Blockchain

I am not a miner…There is more money in cooperation

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A distributed, collaborative production-financial system based on trust

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BLOCKCHAIN FOUNDATIONS

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FhG meeting 2008. 6. 9.



From replicated databases…

Database

Replica DB 1

Replica DB 2

Replica DB 3

Replica DB …

Replica DB …

Replica DB n

10

.

C



Blockchain=block+chain

Block • Operation• (Validated)

BlockBlock

• Operation• (Validated)

• Operation• (Validated)

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Block: validated transaction sequence protected by a hashDistributed databasesState synchronization by simultaneous executionStrict determinism



Blockchain 12

C. Cachin: Hyperledger Fabric V1. Workshop on Blockchain Technology and Theory,16 October 2017, Vienna: http://blockchain-workshop.net/talks/cachin.pdf



HYPERLEDGER FABRIC V1 ARCHITECTURE

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Hyperledger 1.014

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C. Cachin: Hyperledger Fabric V1. Workshop on Blockchain Technology and Theory,16 October 2017, Vienna: http://blockchain-workshop.net/talks/cachin.pdf



Transaction Lifecycle15

Source: https://www.ibm.com/developerworks/cloud/library/cl-top-technical-advantages-of-hyperledger-fabric-for-blockchain-networks/index.html



Cryptographically Tokenized Assets16


Source: Introducing Project "Bletchley" Marley Gray, Principle Architect PM - Microsoft - Azure Blockchain Engineering



Blockchain = Cryptographically Authentic, Shared, Distributed Ledger

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Interaction flow-smart contracts18





Use cases19




INTEROPERABILITY, LEGAL BACKROUNDREQUIREMENTS

StandardizationISO/TC 307: Blockchain and electronic

distributed ledger technologies

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Survey

¡ Priorities− Terminology − Privacy − Governance − Interoperability − Security − Risk

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Blockchain and standardsStandard FocusAS 2805 series Electronic Funds Transfers – Requirements for

Interfaces ISO 20022 seriesFinancial Services

Universal Financial Industry Message Scheme

ISO/IEC 17788/I7789 /19086Cloud Computing

Overview and Vocabulary /Reference Architecture/ SLA Framework

ISO/IEC 18384 seriesInformation Technology

Reference Architecture for SOA

ISO/IEC 27000 series Information Technology

Security Techniques

ISO 31000 seriesRisk Management

Principles and Guidelines

ISO 10962 /6166 series Securities and Related Financial Instruments

Securities and Related Financial Instruments

AS ISO/IEC 38500 Information Technology Governance of IT for the Organization

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Towards smart-*23

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Governmental use24




ASSET MANAGEMENT

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IBM asset management26

FhG meeting 2008. 6. 9.Source: IBM DeveloperWorks



Ledgers…27

FhG meeting 2008. 6. 9.Source: IBM DeveloperWorks



Service map28


Source: IBM DeveloperWorks



Integrating the physical world29





Architecture30





TOWARDS OPEN-SOURCE

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Linux Foundation: Blockchain Frameworks 32


¡ FABRIC: foundation for developing blockchain applications proposed by Tamas Blummer (DAH) and Christopher Ferris (IBM)

¡ Iroha: distributed ledger for infrastructural projects¡ Sawtooth Lake: modular blockchain suite¡ Burrow: permissionable smart contract machine.¡ COMPOSER: collaboration tool for building blockchain

business networks,¡ Blockchain Explorer: web app view/query blocks,

transactions, chain codes¡ Cello: deploying a Blockchain-as-a-Service



PERFORMANCE BENCHMARKING ANDMODELING OF THE HYPERLEDGER FABRIC

A joint project

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End-to-endlatency– MAX/s

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Notetheextrema!

Expectedmaximum:~1.7sLargestmaximum:~2.5s

Expectedmaximum:~1.8sLargestmaximum:~2.2s

BUSINESSPROCESS EXECUTION ONBLOCKCHAIN PLATFORMS

Blockchainification”Porting existing solutions to blockchain platformsSimilar to „cloudification”

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Motivation§ Aspects ofbusinessprocesses

o High level definition ofoManaging collaborationso Between different participantso Executed in acentralized wayL

§ Aspects ofenterprise blockchain platformsoManaging transactionso According to „Smart Contracts”o Between different participantso In arobust,decentralized,secure wayJ

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Motivation§ Model driven engineering

o Higher abstraction levelso Increased productivity

• Reuse ofstandardized models• Simplifying designphase

o Increased automation during developmento Easier quality assurance

• Model validation,model checking,model-based testing

§ „

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BPMNElements

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Participants

Tasks

Data

Control flow

BPMNElements in Blockchain Platforms

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Participants

Tasks

Data

Control flow

Organizations in thenetwork

Transactions on theblockchain

Data model in the„Smart Contract”

Constraints in the„Smart Contract”

Goals§ Dedicated „Smart Contract”for abusinessprocess

o Cannot trust general execution engines• Hard to verify correctness• Unnecessary overhead• Non-trivial integration with blockchain

o Easier traceability between code andspecification

§ Automate parts ofthe implementationo Generate „boilerplate”code

• Cumbersome,error-prone to implement

o Leave only the businesslogic for manual implementation• Skeleton for businesslogic• Integration ofexisting businesslogic implementation?

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Transformation Workflow

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PetriNetModel Smart Contract Model

State Machine Model

Smart Contract Model

Smart Contract Code

BPMNModel


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State Machine Model


Smart Contract Code

BPMNModel

Create aBPMNmodel with anyBPMN conform tool


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State Machine Model


Smart Contract Code

BPMNModel

Gather the high levelcomponents ofthe model

(participants,operations,...)


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State Machine Model


Smart Contract Code

BPMNModel

Mapthe control flowsemantics ofBPMNelements to acommon

language (e.g.,PetriNet)


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State Machine Model


Smart Contract Code

BPMNModel

Construct the state machine forthe allowed execution traces(e.g.,state space exploration)


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State Machine Model


Smart Contract Code

BPMNModel

Merge the dynamic constraints withthe „Smart Contract”model


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State Machine Model


Smart Contract Code

BPMNModel

Generate „Smart Contract”skeleton for the blockchain

platform

Summary§ Blockchain

o Distributedsystemo Securityo Fault-toleranceo Interoperabilityo Throughputo Coverageofbusiness

§ THISISTHENEXTITREVOLUTION

§Cooperationasaservice48

2 2 pataricza andras-blockchain technologiák …...as 2805 series electronic funds transfers...

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