[RFC] Stable Application for Canonical Uniswap V3 Deployment

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Proposal Summary

This proposal formally requests that Stable be recognized as a canonical chain within the Uniswap V3 deployment framework. The intent is to acknowledge the already-deployed Uniswap V3 contract suite on Stable, with Stable Swap (swap.stable.xyz) serving as a standalone, actively maintained frontend that routes trades through this deployment. By doing so, the Uniswap DAO would extend canonical coverage to a USDT-native, high-throughput Layer 1 purpose-built for stablecoin payments, while requiring no additional technical work beyond updating the canonical deployments registry.

Proposal Stakeholders

About Stable

Stable is a high-throughput, EVM-compatible Layer 1 “StableChain” purpose-built for USDT and stablecoin settlement. It treats USDT as a native gas asset, enabling gasless transfers, ultra-low fees, and sub-second finality for dollar-denominated transactions.

Designed as institutional-grade infrastructure, Stable combines predictable performance, regulatory alignment, and dedicated blockspace to support real-world payments, remittances, and high-volume institutional flows. The network targets 10,000+ TPS and provides confidential transfer capabilities tailored to institutional use cases.

Key Attributes

  • USDT-native design: USDT as gas, gas-free transfers, and real-dollar settlement optimized for stablecoin flows.

  • High throughput & low latency: Engineered for high-frequency volume with sub-second finality and a roadmap towards 10,000+ TPS.

  • Institutional-grade infrastructure: Focus on compliance, predictable performance, dedicated blockspace, and confidential transfers for enterprises, fintechs, and payment providers.

  • EVM-compatible: Solidity and Ethereum tooling work out-of-the-box, easing Uniswap V3 deployment and integration with existing DeFi infrastructure.

  • Backed by major ecosystem players: Supported by Bitfinex, Tether, and additional strategic investors, Stable conducted a pre-deposit campaign capped at $1.325 billion.

Target Audience

Stable is targeting:

  • Payment and remittance providers seeking predictable, low-cost USDT rails for cross-border payments and merchant settlement.

  • Fintechs, neobanks, and PSPs that require compliant, enterprise-grade infrastructure with dedicated blockspace, confidential transfers, and integration-friendly tooling.

  • DeFi-native users and builders who want to deploy and trade stablecoin-centric strategies (delta-neutral, basis trades, stablecoin LPs) on a chain optimized for USDT liquidity.

  • Everyday users and merchants who want “cash-like” USDT payments (gasless, sub-second settlement, single-currency UX) without juggling volatile gas tokens.

Bridge

LayerZero provides the cross-chain messaging and bridging infrastructure connecting Stable with Ethereum and other Uniswap-relevant ecosystems, enabling secure movement of assets and messages between canonical Uniswap deployments and Stable. This allows liquidity providers and integrators to bridge assets and orchestrate multi-chain strategies while routing trades through the canonical Uniswap V3 deployment on Stable.

Benefits to Uniswap

By formally recognizing Stable as a canonical Uniswap V3 deployment, the Uniswap DAO gains exposure to a USDT-native, payments-centric Layer 1 that is explicitly designed to scale global stablecoin usage. This deployment can attract new liquidity from payment rails, fintechs, and institutions building on Stable, while preserving Uniswap’s familiar EVM-based integration surface. The combination of gasless USDT transfers, sub-second settlement, and high throughput creates an ideal environment for deep, capital-efficient stablecoin liquidity, reinforcing Uniswap’s position as the default exchange infrastructure for the emerging “stablecoin economy” and extending the protocol’s reach into real-world payments use cases.

Stable DEX Environment

Stable is being designed first and foremost as rails for real-world money movement, with USDT as the native unit of account and gas asset. Within that context, the DEX layer is expected to support not just retail trading, but institutional-grade DeFi integrations and tokenized yield products that require deep, reliable, and composable liquidity.

Stable Swap is the canonical Uniswap deployment on Stable and the default venue for spot liquidity. Its primary role is to act as the base liquidity and routing layer for the ecosystem, with a design focus on:

  • Institutional-grade DeFi integrations

    • Stable Swap provides a standardized, battle-tested AMM foundation that institutions, fintechs, and payment-adjacent applications can integrate against with confidence. Predictable execution, transparent pricing, and composability make it suitable for higher-value flows and regulated counterparties.

  • Tokenized yield products and vaults

    • Stable Swap is intended to underpin tokenized yield strategies (e.g., yield-bearing USDT derivatives, vault tokens, structured products) that rely on continuous on-chain liquidity for issuance, redemption, and secondary market trading.

Other DEX deployments on Stable are purpose-built to complement, rather than replace, Stable Swap:

  • Curve

    • Curve focuses on tightly-pegged asset swaps, particularly stable-to-stable and yield-bearing stable assets. Its role is to offer ultra-low-slippage execution for specialized pools that benefit from amplification, while composability with Stable Swap enables efficient routing and arbitrage.

  • SettleX

    • SettleX targets specialized settlement workflows and advanced execution primitives. It is optimized for bespoke trading and settlement use cases rather than serving as a general-purpose liquidity hub.

Frontend

This deployment is a standalone instance of Uniswap V3, exposed through a dedicated frontend called Stable Swap, with active maintenance and long-term support from Protofire and the Stable ecosystem. The UI is designed to be the default Uniswap experience on Stable, integrating seamlessly with wallets and payment flows on the chain.

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The production frontend is live at: https://swap.stable.xyz

Smart Contracts

Below is a table with all contract addresses.

Contract Name Address
v3 Core Factory 0x88F0a512eF09175D456bc9547f914f48C013E4aA
Multicall 2 0x208099D6E8a107aD485CD1374A6EC5Abd98c7F11
Proxy Admin 0x51D1E70B8cAbDF4F3aB056475802AB1687b3EA23
Tick Lens 0x8dF0D1614aae99352045c62d24d54E72b38111ec
NFT Descriptor Library V1.3.0 0xF7815833076D83161414A46c4E993dC8f22A7ADd
Nonfungible Token Position Descriptor V1.3.0 0x7Cf5987951E48ADf235cc9194bCdc708Eb692D82
Descriptor Proxy 0xcd2cD0E139eC5581138E18C6DBB189c53efBAE95
Nonfungible Token Position Manager 0x3BdC3437405f7D801b6036532713fc1F179136a6
v3 Migrator 0x2C5f4275F1a278BF328D56CB9db304e915DE3082
v3 Staker 0xA32e3E127FF46db40ab3c4775be97ED760AD7178
Quoter V2 0xb070179E7032CdA868b53e6C1742F80c9e940d1A
Swap Router02 0x32eaf9B5d5F2CD7361c5012890C943D7de84C22a
V2 Core Factory 0x25D2d657F539F2bB16eC82773cBE5ee49ddD3c69
Uniswap V2 Router02 0xa571dc7c4f2369F1cA24D3a7E8a35c07Ff52bfC0
Permit2 0x000000000022D473030F116dDEE9F6B43aC78BA3
Universal Router 0x5Be52b52f3d1dbC324d2959637471a4208626144

Timeline

This deployment is already live, fully operational, and actively maintained: the core Uniswap V3 contracts are deployed on Stable, routing through the Stable Swap frontend, with bridge connectivity via LayerZero and an ongoing commitment from Protofire and ecosystem partners to sustain and grow usage over time.

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We agree with making Stable canonical. That being said, we feel a lot of the metrics backing this are missing from the proposal. We were wondering if there were any KPIs of this canonical proposal, past achievements, or metrics of its current deployment?

3

Although the latest UC term has concluded, the deployment efforts pertaining to the Stable deployment began in Q4 of last year. We are therefore concluding that process now.

This proposal has successfully completed the approval period, canonicalizing the associated contracts as the official deployments on Stable. The contracts are verified, and ownership of the factory contracts have been successfully transferred to Uniswap governacne. The UC will update registries in accordance with this approval.

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