Status:

Draft

Type:

Standards Track

Layer:

Peer Services

Created:

[Date]

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Summary

This proposal introduces a subnet on the Bitcoin Cash (BCH) network leveraging the GHOSTDAG protocol to enhance transaction speeds while maintaining the SHA-256 hashing algorithm. This subnet aims to provide a secure and efficient alternative to Zero-Confirmation Escrows (ZCEs).

Background & Motivation

Bitcoin Cash (BCH) currently employs Zero-Confirmation Escrows (ZCEs) to enable instant payments. While ZCEs are effective, they pose risks such as double-spending. The GHOSTDAG protocol, pioneered by Kaspa, addresses these issues by allowing parallel block creation and processing, significantly enhancing transaction throughput and reducing confirmation times without sacrificing security oai_citation:1,Kaspa Achieves 10 BPS in Testnet, Sets a New Benchmark in Cryptocurrency - Kaspa oai_citation:2,What is GHOSTDAG and DAGKNIGHT? - Kaspa oai_citation:3,Introducing Kaspa and Its GhostDAG Protocol.

Deployment

Deployment of this specification does not require network coordination. Sufficient deployment, as per the payee's risk profile, is required before GHOSTDAG-secured transactions can be safely accepted as final.

Specification

1. Integration of GHOSTDAG Protocol:

   • Implement the GHOSTDAG protocol to support high transaction throughput in a Directed Acyclic Graph (DAG) structure.
   • Optimize for low latency, achieving transaction confirmation times within seconds.

2. Retain SHA-256 Hashing Algorithm:

   • Maintain the use of SHA-256 for compatibility with existing BCH mining hardware and to ensure network security.

3. Subnet Development:

   • Develop a dedicated subnet within the BCH network for running GHOSTDAG.
   • Implement interoperability mechanisms for smooth transaction transfers between the BCH mainnet and the GHOSTDAG subnet.

4. Testing and Deployment:

   • Utilize a simulation framework to test the GHOSTDAG implementation under various conditions.
   • Conduct extensive testing followed by a phased rollout to the BCH community.

Benefits

1. Faster Transactions: Near-instant transaction confirmation times.
2. Enhanced Security: Reduced risk of double-spending compared to current ZCEs.
3. Compatibility: Continued use of SHA-256 ensures compatibility with existing BCH infrastructure.

Costs & Risk Mitigation

1. Increased Transaction Sizes: Slight increase in transaction size due to additional GHOSTDAG data.
2. Modification to Transaction Acceptance/Relay: Changes to transaction relay policies might affect existing zero-confirmation transaction users.
3. Node Implementation Complexity: Specialized transaction relay and mining policies might increase the cost and complexity of node implementations.

Reference Implementation

Source Code

```python

GHOSTDAG Network Simulation

import networkx as nx import matplotlib.pyplot as plt

Create a directed graph

G = nx.DiGraph()

Add nodes

G.add_nodes_from([1, 2, 3, 4, 5])

Add edges

G.add_edges_from([(1, 2), (2, 3), (3, 4), (4, 5), (2, 5)])

Draw the graph

nx.draw(G, with_labels=True) plt.show() ```

Directory Structure

bch-ghostdag-subnet/ │ ├── src/ │ └── ghostdag.py │ ├── docs/ │ └── README.md │ ├── tests/ │ └── test_ghostdag.py │ └── requirements.txt

Installation

bash git clone https://github.com/your-repo/bch-ghostdag-subnet.git cd bch-ghostdag-subnet pip install -r requirements.txt

Usage

Run the simulation framework:

bash python -m src.ghostdag

Analyze attack success rates:

bash python -m tests.test_ghostdag

References

1. Kaspa Achieves 10 BPS in Testnet
2. What is GHOSTDAG and DAGKNIGHT?
3. Introducing Kaspa and Its GhostDAG Protocol

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This CHIP aims to guide the development and deployment of the GHOSTDAG subnet, enhancing the BCH network's efficiency and security. Community feedback and participation are crucial for its success.