Uniswap puts Arc fee expansion to Snapshot vote

Uniswap’s protocol-fee rollout is moving toward Arc. A new Temp Check proposal would extend fee collection and UNI burning to the Layer 1 built by Circle for financial markets, real-time money movement and agentic economic activity.

The Snapshot vote is scheduled for September 18-23, 2026, two days after Arc mainnet went live on September 16. An onchain vote would follow if the Snapshot passes. For UNI holders, that creates a defined near-term governance event: the expansion is proposed, but the fee switch on Arc is not yet approved.

Arc launched with Uniswap v2, v3, v4 and UniswapX already deployed. The Temp Check would enable protocol fees on v2, v3 and v4, while extending the infrastructure that collects those fees and routes the resulting UNI burn through the existing cross-chain system.

The mechanics matter. UNI on Arc is a synthetic token under Wormhole’s Native Token Transfer system, or NTT. Protocol fees generated on Arc would burn UNI on Ethereum mainnet through the Tokenjar and Releaser smart contracts. That links activity on Arc to the same mainnet-based burn path used by the broader rollout.

Uniswap began the rollout on Ethereum mainnet in late December last year. It has since extended protocol fees to 11 additional chains: Arbitrum, Base, OP Mainnet, Worldchain, X Layer, Soneium, Zora, Celo, BNB Chain, Polygon and Robinhood Chain. Arc would be the 13th listed network including Ethereum, up from 12.

That is a 1-chain increase on a 12-chain base, or 8.3%: 1 ÷ 12 × 100. The number is small in isolation, but it shows the proposal’s immediate function. Uniswap is adding another network to the revenue and burn infrastructure rather than introducing a separate fee design for Arc.

The strategic read is clear but conditional. Expanding across chains diversifies the places where protocol fees can be generated, while Arc’s launch deployment gives Uniswap an existing set of products to monetize if governance approves the change. Successful implementation could increase value accrual for UNI holders through additional burns; the proposal itself does not establish the amount of fees Arc will generate.

That uncertainty is material for positions. The document does not specify the fee levels for v2, v3 or v4 on Arc, and the exact timing of the onchain vote after the Snapshot is also not stated. Until those points are resolved, UNI holders have a vote date and a proposed mechanism, rather than a disclosed Arc fee run rate.

The immediate consequence is therefore procedural: Arc-based Uniswap activity can enter the protocol-fee system only after the September 18-23 Snapshot and a subsequent successful onchain vote. If both clear, fees from Arc would feed the mainnet UNI-burning process.