How Much Blockchain Do You Need? Towards a Concept for Building Hybrid DApp Architectures (WETSEB油@ ICSE 2018)
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The document discusses the need for a structured approach to building hybrid decentralized application (dApp) architectures that leverage blockchain technology while addressing its limitations. It proposes a four-step method to identify participants, trust relations, interactions, and derive an architectural draft, illustrated through a construction coordination use case. The authors highlight the importance of defining trust models and interaction levels, and call for future work to validate these architectural concepts.
![Four step approach:
1. Identify participants
2. Identify trust relations between participants
3. Identify interactions between participants
4. Derive an architectural draft
Usage
Adding blockchain technology to existing systems
Assessing use cases for implementing a new system
4
B
ZY
S
X
Contractor
Construction
Supervisor
Building
Owner
Contractor Contractor
1. Participants
B
ZY
S
X
Contractor
Construction
Supervisor
Building
Owner
Contractor Contractor
2. Trust Relations
B
ZY
S
X
Contractor
Construction
Supervisor
Building
Owner
Contractor Contractor
3. Interactions
Area B
Area A
B
ZY
S
X
Contractor
Construction
Supervisor
Building
Owner
Contractor Contractor
4. Architectural Draft
[2]](https://image.slidesharecdn.com/papers-2018-how-much-blockchain-do-you-needpresentation-200517192155/85/How-Much-Blockchain-Do-You-Need-Towards-a-Concept-for-Building-Hybrid-DApp-Architectures-WETSEB-ICSE-2018-4-320.jpg)
![Example use case: Coordination and payment of craftsmen constructing a building
1. Identify participants
2. Identify trust relations between participants
Building owner and construction supervisor trust each other
Contractors only trust supervisor as their only contact with the construction site
3. Identify interactions between participants
Contractors report to supervisor
Supervisor reports to building owner
Building owner pays contractors
4. Derive an architectural draft
Use of blockchain technology in Area A makes no sense
For interaction between Building Owner and Contractors using a blockchain makes sense!
5
B
ZY
S
X
Contractor
Construction
Supervisor
Building
Owner
Contractor Contractor
1. Participants
B
ZY
S
X
Contractor
Construction
Supervisor
Building
Owner
Contractor Contractor
2. Trust Relations
B
ZY
S
X
Contractor
Construction
Supervisor
Building
Owner
Contractor Contractor
3. Interactions
Area B
Area A
B
ZY
S
X
Contractor
Construction
Supervisor
Building
Owner
Contractor Contractor
4. Architectural Draft
[2]](https://image.slidesharecdn.com/papers-2018-how-much-blockchain-do-you-needpresentation-200517192155/85/How-Much-Blockchain-Do-You-Need-Towards-a-Concept-for-Building-Hybrid-DApp-Architectures-WETSEB-ICSE-2018-5-320.jpg)
How Much Blockchain Do You Need? Towards a Concept for Building Hybrid DApp Architectures (WETSEB油@ ICSE 2018)
- 1. 1 WETSEB @ ICSE 2018 Gothenburg, Sweden 2018-05-27 Florian Wessling, Christopher Ehmke, Marc Hesenius and Volker Gruhn 鍖orian.wessling@paluno.uni-due.de University Duisburg-Essen, Germany Prof. Dr. Volker Gruhn How Much Blockchain Do You Need? Towards a Concept for Building Hybrid DApp Architectures
- 2. Motivation Take advantage of Blockchain technology: decentralized, trustless, transparent and tamper-proof app environment Deal with disadvantages: blocktime delay, technical complexity, dif鍖cult updates Dif鍖cult to determine: Which attributes are important for my use case? Which elements of my architecture bene鍖t from blockchain technology? Increasing need to build good decentralized app (DApp) architectures Best practices, architectural patterns, design patterns for smart contracts Concepts to support architectural design of blockchain-based applications are missing 2
- 3. Current Approaches 3 No Yes, Public Yes, Private Do I need a Blockchain? Yes, 1.2 MB Blocksize, 13s Blocktime, Hybrid PoS/PoW consensus, ... Yes, custom protocol, 9.4s Blocktime, DPoS consensus, ... Gap: Finer-grained and balanced approach!
- 4. Four step approach: 1. Identify participants 2. Identify trust relations between participants 3. Identify interactions between participants 4. Derive an architectural draft Usage Adding blockchain technology to existing systems Assessing use cases for implementing a new system 4 B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor 1. Participants B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor 2. Trust Relations B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor 3. Interactions Area B Area A B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor 4. Architectural Draft [2]
- 5. Example use case: Coordination and payment of craftsmen constructing a building 1. Identify participants 2. Identify trust relations between participants Building owner and construction supervisor trust each other Contractors only trust supervisor as their only contact with the construction site 3. Identify interactions between participants Contractors report to supervisor Supervisor reports to building owner Building owner pays contractors 4. Derive an architectural draft Use of blockchain technology in Area A makes no sense For interaction between Building Owner and Contractors using a blockchain makes sense! 5 B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor 1. Participants B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor 2. Trust Relations B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor 3. Interactions Area B Area A B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor 4. Architectural Draft [2]
- 6. Outlook: Overall Concept 6 B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor Area B Area A B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor B ZY S X Contractor Construction Supervisor Building Owner Contractor Contractor Architectural Patterns + Best Practices Use Case Terms + Properties Implementation as Smart Contract + Design Patterns
- 7. Open issues How to model trust? Different levels of trust? Depending on context? How to model interactions? What is the right level of abstraction? Which interactions are relevant? Clear terminology for terms is required Validation Small-scale study with group of 8 students (CS Master) Build architectures within research projects (building, energy, insurance) How to quantify the results? How to measure what a good architecture is? Future Work 7
- 8. 8 Thank you! Questions? Discussion?