Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
cross-chain-future-bridges-and-interoperability
Blog

Why the Hub Concept Is a Legacy of Web2 Thinking

The dominant hub-and-spoke model for blockchain interoperability is a direct import from centralized cloud architecture. It creates systemic risk, bottlenecks, and contradicts the foundational goal of building decentralized, anti-fragile networks. The future is a mesh.

introduction
THE LEGACY ARCHITECTURE

Introduction

The hub-and-spoke model is a Web2 architectural relic that creates systemic bottlenecks and security risks in a multi-chain world.

Hub-and-spoke is a Web2 relic designed for centralized control, not decentralized coordination. This model forces all cross-chain liquidity and message routing through a single, trusted point of failure like a canonical bridge or L1 settlement layer.

This creates systemic bottlenecks for both security and composability. A compromised hub like the Wormhole bridge or a halted Cosmos IBC relay chain freezes the entire network of connected chains, violating the core blockchain promise of liveness.

The evidence is in the exploits. Over $2.5B has been stolen from cross-chain bridges, with the majority targeting these centralized hub contracts. The Ronin Bridge and Nomad hacks were not anomalies; they were the predictable outcome of a fatally centralized architecture.

deep-dive
THE LEGACY ARCHITECTURE

The Inherent Flaws: From Bottlenecks to Black Swans

The hub-and-spoke model centralizes risk and creates systemic fragility, contradicting blockchain's core value proposition.

Centralized Choke Points are a single point of failure. Every transaction or message between rollups must pass through the L1 hub, creating a predictable liquidity and sequencing bottleneck. This architecture replicates the client-server model of Web2.

Sovereignty is an Illusion for rollups. While they control execution, their security and liveness are outsourced to the hub's consensus. This creates a shared fate dependency where a hub failure, like an L1 reorg, cascades to all connected chains.

Economic Black Swans concentrate systemic risk. A major exploit or consensus failure on a hub like Ethereum or Cosmos doesn't isolate damage; it freezes the entire interchain economy. This violates the principle of fault isolation that modularity promises.

Evidence: The 2022 Nomad bridge hack exploited a shared, upgradeable hub contract, draining $190M across multiple chains simultaneously. This demonstrates the catastrophic failure mode of centralized message routing.

WHY THE HUB IS A LEGACY CONSTRUCT

Hub vs. Mesh: An Architectural Scorecard

A first-principles comparison of dominant blockchain interoperability architectures, quantifying the trade-offs between centralized routing and peer-to-peer networks.

Architectural MetricHub-and-Spoke ModelPeer-to-Peer Mesh Network

Single Point of Failure

Capital Efficiency (TVL Lockup)

< 50%

95%

Validator/Relayer Capture Risk

High

Negligible

Time to Finality (Worst Case)

~1 hour (Hub Chain Delay)

< 2 minutes

Protocol Integration Overhead

High (Hub-Specific SDK)

Low (Direct Contract Calls)

Sovereignty & Upgrade Control

Ceded to Hub

Retained by Protocol

Cross-Chain MEV Surface

Centralized (Hub Sequencer)

Distributed (P2P Auction)

Exemplar Protocols

Cosmos IBC, Polkadot XCMP

LayerZero, Axelar, Wormhole

counter-argument
THE LEGACY ARCHITECTURE

The Steelman: In Defense of the Hub

The hub-and-spoke model persists because it solves the fundamental coordination problem of a fragmented ecosystem.

Hub-and-spoke architectures are a legacy of Web2 because they are the optimal solution for coordinating disparate systems. They create a single point of truth and settlement, which is a prerequisite for secure cross-domain communication. This is not a design flaw; it is a necessary centralization for liveness and finality.

The alternative is chaos. A fully connected mesh of 100 L2s requires 4,950 trust-minimized bridges. This creates a combinatorial security risk where the weakest bridge compromises the entire network. Hubs like Ethereum or Cosmos provide a shared security anchor that mesh networks lack.

Interoperability standards require a hub. Protocols like IBC on Cosmos or the shared security of Ethereum's L2s (Arbitrum, Optimism) demonstrate that a common communication layer is non-negotiable. Without a hub, you get the current state of EVM chains: a mess of proprietary bridges like Across and Stargate, each with its own trust assumptions.

Evidence: Ethereum's dominance as a settlement layer is the proof. Over 60% of Total Value Locked in DeFi resides on its L2 rollups, which all use Ethereum for data availability and finality. This concentration is a feature, not a bug, for security.

protocol-spotlight
THE MODULAR FUTURE

Building the Mesh: Who's Getting It Right?

The monolithic hub-and-spoke model is a Web2 relic. True scalability and sovereignty demand a peer-to-peer mesh of specialized networks.

01

Celestia: The Minimal Data Availability Hub

Rejects the execution layer entirely, focusing solely on cheap, scalable data availability. This enables sovereign rollups to launch without permission.

  • Enables true modular sovereignty; chains own their execution and settlement.
  • Scales DA throughput independently, with ~$0.01 per MB blob costs.
  • Proves that a hub's value is in unbundling, not bundling.
~$0.01
Per MB Cost
100+
Rollups Deployed
02

EigenLayer: The Security Marketplace

Turns Ethereum's staked ETH into a reusable security primitive for new networks (AVSs). It's a hub for cryptoeconomic security, not transactions.

  • Re-stakes $15B+ in TVL to bootstrap security for new protocols.
  • Unbundles security from consensus, a core tenet of modular design.
  • Creates a market where security is a commodity, not a monopoly.
$15B+
TVL Secured
100+
AVSs
03

The Problem: Cosmos & Polkadot's App-Chain Tax

Their shared security models often impose a sovereignty tax—forcing chains to use a native token (ATOM, DOT) for security and governance.

  • Creates economic alignment but also vendor lock-in and high capital costs.
  • Contrasts with the permissionless validator set freedom of Ethereum rollups or Celestia rollups.
  • Shows that a hub's governance can become a bottleneck for innovation.
High
Capital Cost
Vendor
Lock-In Risk
04

Arbitrum & Optimism: The Superchain Vision

Building a coordinated network of L2s (Orbit Chains, OP Stack chains) with shared bridging and governance. It's a hub for developer tooling and liquidity.

  • Standardizes tech stack (OP Stack, Arbitrum Orbit) for ~2-second cross-chain messaging.
  • Aggregates liquidity and users across a unified ecosystem.
  • Balances sovereignty with interoperability, but centralizes upgrade keys.
~2s
Cross-Chain Msg
$18B+
Aggregate TVL
05

The Solution: Peer-to-Peer Interoperability (LayerZero, Axelar)

These protocols enable direct, application-layer messaging between any chain, bypassing central hubs. The mesh is the infrastructure.

  • Enables omnichain applications where logic spans multiple sovereign chains.
  • Reduces reliance on any single bridge or liquidity hub.
  • Proves the endpoint (validators/ors) matters more than the pathway.
50+
Chains Connected
Direct
P2P Messaging
06

The Future is a Mesh of Specialists

No single hub wins. The end-state is a mesh where Celestia provides DA, EigenLayer provides security, Arbitrum provides execution clusters, and LayerZero provides connectivity.

  • Winners are protocols that provide the best primitive, not the most bundled suite.
  • Developers will assemble chains like Lego from the best-in-class components.
  • The Hub is an anti-pattern; the network is the platform.
Lego
Chain Design
Best-in-Class
Primitives Win
takeaways
WHY HUBS ARE ANTI-PATTERNS

Takeaways

The hub-and-spoke model centralizes risk and creates systemic fragility, a direct import from Web2 that fails in a trust-minimized world.

01

The Single Point of Failure Fallacy

Hubs like Cosmos IBC or Polkadot's Relay Chain concentrate validation and consensus, creating a systemic risk vector. A compromise here jeopardizes all connected chains.\n- Vulnerability: A 33%+ validator attack on the hub can halt or censor cross-chain flows.\n- Contagion: Unlike isolated L1 failures, a hub breach propagates instantly across the entire ecosystem.

1
Failure Point
N
Chains Affected
02

The Scalability Bottleneck

Hub throughput is limited by its own consensus, creating a ceiling for the entire network. This is the same scaling problem L1s face, now imposed on interop.\n- Throughput Cap: Total cross-chain messages are bounded by hub TPS (e.g., ~1,000 TPS for Cosmos).\n- Latency Tax: Every message requires finality on two chains plus the hub, adding ~2-6 seconds of unnecessary latency.

~1k
TPS Ceiling
+2-6s
Latency Tax
03

Sovereignty vs. Subjugation

Hubs enforce a monolithic security and upgrade model. Connected chains sacrifice sovereignty, trading one ruler (Ethereum) for another (the Hub).\n- Governance Capture: Hub governance can impose upgrades or fees on all spokes.\n- Vendor Lock-in: Migrating away requires rebuilding all cross-chain connections, creating high switching costs.

100%
Govt. Surface
04

The Capital Inefficiency Trap

Securing a hub requires massive, dedicated capital (e.g., $2B+ staked on Cosmos) that sits idle instead of securing individual application chains.\n- Stake Duplication: Chains must still secure themselves AND rely on the hub's security, leading to double-spending of security budget.\n- Opportunity Cost: Capital locked in hub staking isn't available for DeFi pools or app-chain-specific security.

$2B+
Idle Capital
05

Modular > Monolithic (Even for Interop)

The future is unbundled. Just as execution separated from consensus (Rollups), interoperability must separate verification, transport, and execution.\n- Specialized Networks: Layers like LayerZero (messaging), Axelar (general message passing), and Hyperlane (modular security) outperform monolithic hubs.\n- Composability: Teams can mix-and-match components (e.g., Celestia for DA, EigenLayer for security, CCIP for transport) without a central coordinator.

N/A
No Single Hub
06

Intent-Based Architectures Render Hubs Obsolete

New paradigms like UniswapX and CowSwap's solver networks abstract away the "how". Users declare intent; a decentralized solver network finds the optimal path across any liquidity source or chain.\n- User-Centric: No need to understand hub topology or bridge assets manually.\n- Path Optimization: Solvers dynamically route through the most efficient bridge (e.g., Across, Stargate) or L2 native bridge, avoiding hub bottlenecks entirely.

~500ms
Quote Time
Best
Execution
ENQUIRY

Get In Touch
today.

Our experts will offer a free quote and a 30min call to discuss your project.

NDA Protected
24h Response
Directly to Engineering Team
10+
Protocols Shipped
$20M+
TVL Overall
NDA Protected Directly to Engineering Team
Hub-and-Spoke Is Web2 Thinking in a Web3 World | ChainScore Blog