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Coalition Formation Game for Cost-Efficient Multiparty Payment Channel in Payment Channel Networks.

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Summary

This study introduces multiparty payment channels (MPC) to improve blockchain payment efficiency. A novel coalition formation algorithm successfully establishes MPCs, balancing payoff gains against delay costs for faster, cheaper transactions.

Keywords:
blockchaincoalition formation gamecryptocurrencymultiparty payment channelpayment network

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Area of Science:

  • Computer Science
  • Cryptography
  • Distributed Systems

Background:

  • Blockchain technology offers secure, tamper-proof cryptocurrencies but faces limitations in payment speed and transaction costs due to global consensus.
  • Existing payment channel networks (PCN) aim to mitigate these issues by enabling off-chain transactions, yet scalability challenges persist with large network sizes.
  • Legacy payment channels (PC) typically involve only two parties, limiting their efficiency in broader applications.

Purpose of the Study:

  • To propose a novel multiparty payment channel (MPC) solution that enhances transaction efficiency beyond traditional two-party payment channels.
  • To address the inherent delays and costs associated with large-scale payment channel networks.
  • To develop a distributed algorithm for dynamic coalition formation within MPCs, allowing user participation flexibility.

Main Methods:

  • Introduction of multiparty payment channels (MPC) allowing multiple users within a single payment channel.
  • Implementation of sequential and parallel update mechanisms to bypass consensus procedures among MPC participants.
  • Development and application of a distributed coalition formation algorithm enabling users to dynamically join or leave MPC groups.

Main Results:

  • The proposed algorithm successfully establishes multiparty payment channels (MPCs).
  • Simulations demonstrate the effectiveness of the coalition formation algorithm in managing MPC group dynamics.
  • The study validates the trade-off between potential payoff gains and the incurred delay costs within MPCs.

Conclusions:

  • Multiparty payment channels (MPC) offer a viable solution to overcome the limitations of traditional blockchain payment systems and single-party payment channels.
  • The proposed distributed coalition formation algorithm effectively facilitates the creation and management of MPCs, optimizing for efficiency.
  • The research highlights the importance of balancing economic incentives with transaction costs in the design of scalable blockchain payment solutions.