Proxima: DAG-based Cooperative Ledger Enhances Scalability and Decentralization → Research

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Briefing

Traditional blockchains struggle with scalability, high transaction costs, and energy consumption, often compromising decentralization or requiring fixed validator sets. Proxima proposes a novel DAG-based distributed ledger where UTXO transactions form the graph, achieving consensus through “cooperative consensus,” a profit-driven behavior of token holders following a “biggest ledger coverage rule,” removing the need for miners, validators, or committees. This leaderless, permissionless architecture offers high throughput, scalability, and low transaction costs while maintaining decentralization and energy efficiency, fundamentally reshaping future blockchain design.

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Context

Prior to Proxima, distributed ledger designs frequently navigated the “blockchain trilemma,” balancing decentralization, security, and scalability. Proof-of-Work systems, while decentralized and secure, incurred high energy costs and limited transaction throughput. Proof-of-Stake introduced efficiency but often relied on fixed validator sets or complex committee elections, raising concerns about centralization and potential collusion. The challenge remained to achieve high performance and low costs without sacrificing the core tenets of permissionless, decentralized participation.

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Analysis

Proxima redefines the ledger structure from a linear chain of blocks to a Directed Acyclic Graph (DAG) where individual UTXO (Unspent Transaction Output) transactions are the vertices. This structural shift allows for parallel processing of transactions, inherently boosting throughput. The consensus mechanism, termed “cooperative consensus,” operates without a designated leader or fixed validator set; instead, token holders, driven by economic incentives, collectively extend the ledger by adhering to a “biggest ledger coverage rule,” which is analogous to Bitcoin’s “longest chain rule.” This mechanism ensures that participants are incentivized to cooperate in validating and adding transactions, fundamentally departing from energy-intensive Proof-of-Work and committee-dependent Proof-of-Stake models.

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Parameters

Core Concept → Directed Acyclic Graph (DAG) Ledger
New System/Protocol → Proxima
Consensus Mechanism → Cooperative Consensus
Consensus Rule → Biggest Ledger Coverage Rule
Participation Model → Permissionless (token holders)
Ledger Elements → UTXO Transactions as Vertices
Key Authors → Evaldas Drasutis

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Outlook

The Proxima architecture presents a significant avenue for future research into highly scalable and truly decentralized ledger technologies. Its leaderless, permissionless design could unlock real-world applications requiring extremely high transaction throughput and low costs, such as micro-transaction networks, decentralized IoT data streams, or global payment systems, within the next 3-5 years. Further academic exploration will likely focus on formalizing the game-theoretic stability of the “biggest ledger coverage rule” under various adversarial conditions, optimizing UTXO transaction validity constraints, and exploring the integration of privacy-preserving primitives within this DAG-based framework.

Proxima’s novel DAG-based cooperative consensus re-architects distributed ledger fundamentals, offering a pathway to unparalleled scalability and decentralization for future blockchain ecosystems.

Signal Acquired from → arxiv.org