https://youtu.be/mVaS-gLi1Co

Concrete architecture�of Bitcoin Core

Presenter:

Xueyi Jia

Jihong Zhang

Leader:

Jinlun Zhang

Contents Overview

Introduction

Derivation Process

Alternatives Architecture

Concrete Architecture / Reflection Analysis

Second-level subsystem with Reflection 

Use case

Lesson Learnt /Limitation 

Conclusion 

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Introduction��

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Conceptual Architecture (in A1)

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What dependencies added/removed

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Concrete Architecture

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Intention of Reflection model

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Derivation Process

Brainstorm -> Mapping by Understand -> Ideas Organization -> Make sketch

(Mapping by Understand)

(Update Concrete Architecture)

Alternatives Considered

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• Alternatives - Conceptual Architecture
• Modify due to external knowledge
• Repeated verification

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• Alternatives - Concrete Architecture
• Rebuild model by Understand
• Mapping Connections between subsystems
• Add/Remove due to unexpected components

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Reflection Analysis

Generally, through observing the clean concrete architecture shown on Understand, one can immediately notice the 2 unexpected top-level components, ‘Utility’ and ‘Consensus Method’. The Utility component in the cleaned concrete architecture stores a wide variety of files for the consistent and reliable deployment and execution of Bitcoin Core.

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Conceptual Architecture Changed

• Overview:

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• Client-and-Server style

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• New subsystems: ‘Utility’ and ‘Consensus Method’

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• Many new dependencies

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• New dependencies: 

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• RPC-API => Miner

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• Wallet => Validation Engine

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• Wallet => Connection Manager

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• Storage Engine <=> Miner

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2^nd-Level Subsystem

Component related to mining of blocks in conceptual architecture

• Mining hardware
• Mining software
• Mining pools
• Mining nodes
• Networking and communication

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Conceptual Architecture of Mining 

2^nd-Level Subsystem of Reflection Analysis

Component related to mining of blocks

• Block Constructor 
• Proof of Work (Pow) Algorithm
• Miner Node
• Mining-related RPCs
• Merkle Tree 

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Dependencies of Mining by Understand

Concrete Architecture of Mining

Sequence Diagram

Use case of Mining

Lesson Learnt/Limitations

What we Learnt

• Differences between Conceptual and Concrete Architectures 

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• Value of Scitools Understand

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• Importance of teamwork

Limitations

• Complexity and time-consuming nature of Scitools Understand.

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• Insufficient documentation in Bitcoin Core source code.

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• Redundant dependencies complicating Concrete Architecture analysis.

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Conclusion

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• Identified the client-server architectural style as suitable for the Concrete Architecture.
• Refined the Conceptual Architecture by studying developer documentation and using Scitools Understand.
• Revealed new dependencies between subsystems through reflective analysis.

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• Removed some dependencies for testing and maintenance to clarify component relationships.

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• Gained a deeper understanding of Bitcoin Core's architecture, benefiting future research, development, and maintenance efforts.

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Thank you