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Blog

Why Gasless Voting Is a Double-Edged Sword for Security

An analysis of how meta-transaction infrastructure like Gelato, while solving for user onboarding, creates a critical new attack vector in DAO governance by introducing trusted relayers, compromising censorship-resistance and finality guarantees.

introduction
THE INCENTIVE MISMATCH

Introduction

Gasless voting abstracts transaction costs, creating a critical misalignment between voter action and protocol security.

Gasless voting decouples cost from action. Users signal preferences without paying network fees, removing the natural economic friction that prevents spam and frivolous proposals in systems like Ethereum and Solana.

This creates a subsidy attack surface. Protocols like Snapshot and Tally absorb meta-transaction costs, making governance participation a free public good vulnerable to Sybil and proposal spam, as seen in early DAO experiments.

The security model inverts. In fee-markets, stake-weighted voting aligns cost and influence. Gasless systems rely solely on token-weighted voting, which is cheaper to manipulate at scale without the gas fee barrier.

Evidence: The 2022 Optimism governance spam incident, where a single actor submitted hundreds of proposals, demonstrated the cost of abstracting gas. Mitigation required manual intervention and new proposal deposits.

thesis-statement
THE INCENTIVE MISMATCH

The Core Contradiction

Gasless voting decouples participation cost from network security, creating a systemic vulnerability to low-cost governance attacks.

Gasless voting subsidizes apathy by removing the direct economic cost of submitting a governance transaction. This creates a principal-agent problem where voters bear zero financial stake in the consequences of their votes, unlike token holders who suffer from protocol degradation.

Delegation becomes a security liability. Systems like Snapshot and Tally enable effortless voting but concentrate power in a few delegates. This creates single points of failure where compromising a delegate's key or offering a small bribe can swing major proposals.

The cost of attack plummets. An attacker needs only to convince or compromise delegates controlling a voting quorum, a task far cheaper than acquiring and staking the underlying tokens. This exploits the incentive gap between voters and stakeholders.

Evidence: The 2022 Beanstalk governance attack demonstrated this flaw. An attacker borrowed funds, passed a malicious proposal via Snapshot, and drained $182M, all without ever owning the governance token. The protocol's gasless voting mechanism was the critical enabler.

SECURITY TRADEOFFS

Attack Vector Comparison: Native vs. Gasless Voting

A side-by-side analysis of the core security properties and attack surfaces for on-chain voting versus gasless, intent-based voting systems like Snapshot and Tally.

Attack Vector / PropertyNative On-Chain VotingGasless Off-Chain VotingHybrid (e.g., SafeSnap)

Sybil Attack Resistance

Directly tied to token stake

Relies on off-chain sybil detection (e.g., Gitcoin Passport, BrightID)

Relies on off-chain sybil detection

Transaction Cost Burden

Voter pays gas (e.g., $10-100)

Relayer pays gas, voter pays zero

Voter pays final execution gas only

Vote Buying Visibility

On-chain, transparent, detectable

Off-chain, opaque, hard to detect

Off-chain aggregation, on-chain reveal

Execution Finality Lag

Vote = Execution, 0 blocks

Multi-step process with 1-7 day delay

Time-locked execution after vote finalizes

Censorship Resistance

High (if base L1 is uncensorable)

Low (relayer can censor signatures)

Medium (dependent on executor)

Maximum Voter Participation

Capped by gas budget & wallet UX

Theoretically unlimited

Capped by final execution gas budget

Smart Contract Attack Surface

Voting contract only

Voting contract + signature aggregator + relayer network

Voting contract + oracle (e.g., UMA) + executor

deep-dive
THE TRUST TRAP

The Slippery Slope of Trusted Finality

Gasless voting outsources consensus security to a trusted third party, creating a systemic vulnerability.

Gasless voting eliminates Sybil resistance. Paying gas is the primary cost for on-chain identity. Removing it requires a centralized validator to filter spam, shifting the security model from economic to social.

The trusted sequencer becomes the attack vector. Systems like Arbitrum's initial design and early Optimism rely on a single entity for transaction ordering. A compromised sequencer can censor or reorder votes, breaking governance.

This creates a liveness-security tradeoff. Projects like Polygon's PoS chain and BNB Chain prioritize low-cost voting but inherit the security assumptions of their small validator sets, which are easier to corrupt than a decentralized miner network.

Evidence: The 2022 Nomad Bridge hack exploited a trusted upgrade mechanism approved by a small, off-chain multisig, demonstrating how trusted finality fails.

risk-analysis
GASLESS VOTING

Concrete Risks & Exploit Scenarios

Removing gas fees from governance lowers participation barriers but introduces novel attack vectors that can undermine the entire system.

01

The Sybil Manufacturing Plant

Gasless voting eliminates the primary economic cost of creating governance influence. Attackers can spin up thousands of pseudo-anonymous wallets at near-zero cost to execute a 51% attack on a proposal. This fundamentally breaks the 1-token-1-vote assumption, turning governance into a contest of wallet generation speed.

$0
Cost to Attack
10k+
Wallets/Hour
02

The Relayer Centralization Bottleneck

Users rely on a trusted relayer network (e.g., Gelato, Biconomy) to pay gas and submit votes. This creates a single point of censorship and failure. A malicious or compromised relayer can:

  • Censor votes for or against specific proposals.
  • Front-run or manipulate vote ordering.
  • Go offline, halting governance during critical periods.
1-3
Major Relayers
100%
Protocol Risk
03

The MEV-Governance Feedback Loop

Gasless vote transactions are public in the mempool before being bundled. This creates a new MEV (Maximal Extractable Value) opportunity. Searchers can analyze voting patterns and:

  • Front-run governance token buys/sells based on likely outcomes.
  • Sandwich attack liquidity around proposal execution.
  • Bribe voters in real-time to change votes, corrupting the process.
$M+
Potential Extractable Value
Unquantifiable
Integrity Loss
04

Solution: Proof-of-Personhood & Costly Signals

Mitigation requires reintroducing a non-monetary but costly barrier to entry. Effective models include:

  • Proof-of-Personhood (World ID, BrightID) to limit one vote per human.
  • Proof-of-Stake with Lockup requiring time-locked capital to vote.
  • Futarchy & Prediction Markets to shift focus to skin-in-the-game forecasting rather than raw vote count.
1
Vote/Human
7d+
Stake Lock
counter-argument
THE SECURITY TRADEOFF

The Rebuttal: "But It's Just Gas Sponsorship"

Gasless voting abstracts gas costs, creating systemic risks that outweigh the user experience benefits.

Gasless voting removes economic friction for users but introduces a critical principal-agent problem. The entity sponsoring the gas (e.g., a protocol treasury, a foundation) now controls the economic cost of governance participation, which is a core security mechanism.

This creates a subsidy attack vector. A malicious actor can spam governance with low-cost, high-volume proposals to drown out legitimate discourse or force a treasury drain, as the sponsor bears the financial brunt. This is a known attack mitigated by gas fees in systems like Ethereum mainnet.

Compare to gas sponsorship in DeFi. Protocols like UniswapX or Particle Network sponsor gas for intents, but the economic outcome (swap execution) is the user's liability. In governance, the sponsored action (a vote) directly impacts protocol ownership and treasury control, creating misaligned incentives.

Evidence: The 2022 Optimism Governance incident, where a flawed proposal triggered massive voting, demonstrated how gasless mechanics can enable governance spam. While not malicious, it highlighted the system's fragility when participation is artificially cheap.

takeaways
SECURITY TRADEOFFS

Key Takeaways for Protocol Architects

Gasless voting boosts participation but introduces novel attack vectors that can undermine governance integrity.

01

The Sybil Attack Amplifier

Gasless voting removes the primary economic cost of creating governance power, making Sybil attacks trivial. This forces a dangerous reliance on centralized identity providers like Gitcoin Passport or Worldcoin.

  • Key Risk: Delegates with 1M+ votes can be manufactured for pennies.
  • Key Mitigation: Must layer proof-of-personhood with stake-weighted checks.
$0
Attack Cost
1M+
Fake Votes
02

The Meta-Governance Liquidity Attack

Protocols like Aave and Compound that use tokenized votes (e.g., aTokens, cTokens) become vulnerable. Attackers can borrow vast voting power without economic skin in the game, execute a malicious proposal, and exit.

  • Key Vector: Flash loan $100M+ in governance tokens, vote, repay.
  • Key Defense: Implement vote latency or bonding periods to disincentivize short-term attacks.
$100M+
Flash Loan Power
0
Capital At Risk
03

Relayer Centralization & Censorship

Gasless transactions require a relayer network (e.g., Gelato, Biconomy). This creates a single point of failure. A malicious or coerced relayer can censor votes or front-run governance transactions.

  • Key Dependency: Governance security inherits the ~5 major relayers' integrity.
  • Key Solution: Design for relayer diversity and permissionless relay fallbacks.
~5
Critical Relayers
100%
Censorship Risk
04

Voter Apathy & The Lazy Delegation Problem

Zero-cost voting increases low-quality participation. Users delegate to the default option or influencers without diligence, creating voting cartels. This centralizes power with a few delegates like "stakefish" or "Figment".

  • Key Metric: >60% of votes often follow top 3 delegates.
  • Key Design: Implement delegate incentives and vote delegation expiry.
>60%
Vote Concentration
0
Voter Diligence
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Gasless Voting Security Risks: The Relayer Attack Surface | ChainScore Blog