- Fraxtal & Mode
Fraxtal and Mode are Frax's own L2 rollups, built on the OP Stack. Unlike most L2s that use ETH as the native gas token, Fraxtal and Mode use FRAX as the gas currency - meaning every transaction on these chains circulates FRAX, making it a productive infrastructure asset rather than just a settlement token. The chains deploy the full Frax Finance stack (FRAX, frxETH, Fraxswap, Fraxlend) as native day-one infrastructure, creating self-contained DeFi ecosystems where FRAX is simultaneously the stablecoin, the gas token, and the collateral asset.
Fraxtal & Mode by the Numbers
Gas Cost Comparison - Fraxtal vs Base vs Arbitrum
Compare transaction costs across L2s. Fraxtal's FRAX-denominated gas often wins for DeFi interactions due to efficient sequencer conversion and no bridging costs for FRAX-native ops. Set your daily transaction volume to see weekly/monthly cost differences.
FRAX-as-Gas Yield Simulation
When you hold FRAX on Fraxtal, every gas payment creates a small yield for FRAX holders via the Surplus Buffer mechanism. As TVL and transaction volume grow, the structural FRAX demand from gas creates a compounding yield effect. Simulate your FRAX holdings' gas yield.
? Fraxtal Day-1 DeFi Stack
When Fraxtal launched, it didn't just launch a blockchain - it deployed the entire Frax Finance ecosystem as native contracts. Here's how the pieces connect, with FRAX at the center as both stablecoin and gas token:
Frax Finance Overview
Frax's fractional-algorithmic stablecoin, AMO controller, collateral ratio, and all-chain expansion
veFXS & Gauge Weights
Stake FXS for veFXS, direct protocol emissions, and earn bribe income from Frax and Solidly-style gauges
Fraxswap AMM
The custom AMM built for FRAX pairs - bonding curves, concentrated liquidity, and FRAX-native swap fees
Fraxlend
Permissionless lending markets for FRAX and other collateral - interest rate curves, health factors, and liquidation logic
How Fraxtal & Mode work
Fraxtal and Mode are OP Stack rollups - meaning they inherit Ethereum's security model through the Optimism Bedrock architecture while operating as independent L2s with their own sequencer, block production, and fee markets. The defining architectural choice is that both chains use FRAX as the gas token instead of ETH. When a user submits a transaction, they pay gas in FRAX. The sequencer accumulates this FRAX, purchases ETH on the open market to cover L1 data publishing costs, and the remaining FRAX flows to the Frax Surplus Buffer.
This design creates a structural demand for FRAX that no other L2 has: every transaction on Fraxtal or Mode requires FRAX, which is then partially converted to ETH for operational costs and partially retained in the Surplus Buffer. The result is that FRAX becomes a productive asset on these chains - not just a stablecoin for DeFi, but an infrastructure asset that generates yield for its holders through the compounding effect of gas revenue. As transaction volume grows (from DeFi activity, user transfers, smart contract interactions), the FRAX gas demand compounds.
The day-1 DeFi stack deployment is the other critical differentiator. Rather than launching with minimal infrastructure and waiting for protocols to port, Fraxtal launched with FRAX (as both stablecoin and gas), frxETH (ETH staking derivative), Fraxswap (the native AMM), Fraxlend (permissionless lending), and the veFXS gauge system all as native contracts. This means from the first block, users can: trade FRAX pairs on Fraxswap, provide LP and earn FCA emissions, borrow against ETH in Fraxlend, and participate in veFXS governance. Mode followed a similar pattern with the Frax Finance stack deployed at launch.
The OP Stack foundation means both chains benefit from Optimism's ongoing R&D (Cannon MIPS proving, Bedrock upgrades, Superchain compatibility), while Frax controls the application layer entirely. Fraxtal and Mode can communicate with each other and with other OP Stack chains via the Superchain messaging layer, enabling cross-L2 DeFi composability. As of 2026, combined TVL across both chains exceeds $1.2B, with daily transaction counts in the hundreds of thousands generating significant FRAX gas revenue.
Key concepts
- FRAX-as-gas mechanics
- Users pay transaction fees in FRAX. The Fraxtal/Mode sequencer converts FRAX to ETH to cover L1 data publishing costs (the actual cost of publishing transaction data to Ethereum). The spread - FRAX gas revenue minus ETH purchase cost - plus the residual FRAX after conversion, flows to the Frax Surplus Buffer. This creates structural FRAX demand from every transaction, and a structural FXS buyback mechanism funded by chain activity. Users experience gas fees in FRAX at rates competitive with or cheaper than ETH-gas L2s.
- OP Stack foundation
- Fraxtal and Mode are built on the OP Stack, the open-source rollup framework developed by Optimism. This means they inherit: Bedrock architecture (low calldata costs, parallel transaction execution), Cannon MIPS-based fraud proofs (or ZK proofs as the system matures), Superchain compatibility (cross-chain messaging via the Shared L2Output Oracle and OP Stack bridges), and ongoing R&D from the Optimism collective. The OP Stack is also the framework used by Base, Worldcoin, and Zora - making Fraxtal part of a growing ecosystem of interoperable L2s.
- Day-1 DeFi stack
- Fraxtal launched with the full Frax Finance protocol suite deployed as native contracts: FRAX (stablecoin + gas token), frxETH (ETH staking derivative), Fraxswap V2 (native AMM with veFXS gauge integration), Fraxlend (permissionless lending markets), and the veFXS governance system. This is unique in DeFi - most L2 launches require protocols to be ported or redeployed, creating a bootstrapping gap. Fraxtal's day-1 stack means users can immediately access production DeFi infrastructure without waiting for ecosystem development.
- Structural FRAX demand
- Because every transaction requires FRAX for gas, and every FRAX spent on gas is partially retained in the Surplus Buffer after ETH conversion costs, FRAX experiences compounding structural demand from chain activity. At 500,000 daily transactions with an average $0.03 FRAX gas cost, that's $15,000/day of FRAX gas revenue, with a portion flowing to the Surplus. This is fundamentally different from ETH-gas chains where gas fees leave the protocol entirely and do not benefit the base asset's ecosystem.
- Fraxswap on Fraxtal
- Fraxswap is the native AMM on Fraxtal and Mode - deployed as the primary trading venue for FRAX pairs and other assets. Because FRAX is the gas token, FRAX/USDC liquidity on Fraxswap has a structural advantage: LPs can use their FRAX for both LP positions and gas payments without bridging. Fraxswap pools on Fraxtal receive FCA emissions via the veFXS gauge system, just like on Ethereum mainnet and other chains, but with lower gas costs for LP management operations.
- Mode vs Fraxtal
- Mode is Frax's second OP Stack L2, launched with the same FRAX-as-gas design but positioned as a parallel ecosystem growth layer. Mode has its own governance token (MOD) which is separate from FXS and serves as the incentive token for Mode-specific ecosystem development. Both chains share the Frax Finance infrastructure (FRAX, frxETH, Fraxswap, Fraxlend) but have distinct partner ecosystems and user communities. Technically they are similar - OP Stack, FRAX gas, Frax Finance stack - but ecosystem strategy differentiates them.
Why Fraxtal & Mode matter
Fraxtal and Mode represent Frax's most ambitious infrastructure bet: making FRAX the foundational currency of an entire L2 ecosystem rather than just a bridged asset on someone else's chain. This is a structural advantage that no other stablecoin has achieved - USDC is on many chains but is never the gas token; DAI is multi-chain but doesn't function as gas. Frax is the only stablecoin that is simultaneously: (1) a production DeFi collateral asset; (2) a gas token on its own L2s; and (3) a cross-chain settlement token via LayerZero bridges.
The day-1 DeFi stack means Fraxtal launched with an immediately functional DeFi ecosystem - no bootstrapping gap, no waiting for protocols to port. Combined with FRAX-as-gas creating structural demand for every transaction, and the Surplus Buffer benefiting from chain activity to fund FXS buybacks, the Frax L2 strategy is a vertically integrated system where each layer reinforces the others: DeFi activity -> FRAX gas demand -> Surplus Buffer growth -> FXS burns -> FRAX credibility -> more DeFi activity. As of 2026, combined TVL exceeds $1.2B and growing, with transaction volume generating compounding Surplus Buffer contributions. Understanding Fraxtal and Mode is essential for understanding where Frax is heading - it's no longer just a stablecoin protocol, it's becoming a????? company.
Frequently asked questions
- Why does Fraxtal use FRAX as the gas token instead of ETH?
- Most L2s use ETH as the gas token because it's the native asset of Ethereum mainnet and is universally accepted. Fraxtal chose FRAX as the gas token for strategic infrastructure reasons: it makes FRAX a productive asset from day one (you must hold FRAX to pay gas), drives massive organic demand for FRAX from every transaction on the chain, and creates a self-reinforcing ecosystem where DeFi activity circulates FRAX rather than just settling to it. It also gives Frax's stablecoin infrastructure a home chain where it is the primary currency, not just another bridged asset.
- How is the gas fee paid in FRAX different from ETH gas?
- When you submit a transaction on Fraxtal, you pay gas in FRAX. The Fraxtal sequencer accepts FRAX for gas and uses a portion of that FRAX to purchase ETH on the open market to pay the actual L1 data publishing costs. This means FRAX is continuously being converted to ETH to cover L2 operational costs - creating a structural sink for FRAX and a structural buyer of ETH. The remaining FRAX from gas fees goes to the Frax Surplus Buffer, funding FXS buybacks. Users experience it like any other L2: transactions cost fractions of a cent, denominated in FRAX.
- What does 'day-1 DeFi stack' mean for Fraxtal?
- On most L2s, DeFi protocols need to be ported or redeployed after the chain launches - which takes months and creates a bootstrapping gap where there is no DeFi infrastructure. Fraxtal deploys the full Frax Finance stack as native contracts on day one: FRAX (stablecoin + gas), frxETH (ETH staking derivative), Fraxswap (AMM), Fraxlend (lending), and the veFXS gauge system. This means Fraxtal launches with a complete, interconnected DeFi ecosystem where every component is already production-tested and cross-integrated - users can LP, borrow, and earn FCA emissions immediately.
- What is Mode and how does it differ from Fraxtal?
- Mode is Frax's second OP-Stack L2, also launched in 2024 with FRAX as the gas token. It is technically similar to Fraxtal (both are OP Stack rollups using FRAX for gas), but Mode was positioned as an alternative growth layer with a different ecosystem focus: Mode targeted Mode Network's own ecosystem and partner protocols. Both chains share the same core infrastructure (FRAX gas, Fraxswap, Fraxlend) but have distinct deployed protocol sets and partner communities. Mode also has its own token (MOD) which is separate from FXS.
- How does using FRAX as gas create yield for FRAX holders?
- When users pay gas in FRAX, the Fraxtal sequencer converts that FRAX to ETH to cover L1 data costs. The spread between the FRAX gas revenue and the ETH purchase cost, plus the residual FRAX after ETH conversion, flows to the Frax Surplus Buffer. That Surplus Buffer is then used by the AMO controller to buy back and burn FXS. So every transaction on Fraxtal (even simple transfers) generates a small amount of FXS buyback demand. At millions of daily transactions, this creates a compounding structural demand for FRAX and a structural FXS burn mechanism.
- How does Fraxtal compare to Base in terms of gas costs?
- Base uses ETH for gas with fees typically ranging from $0.01 to $0.10 per transaction depending on L1 congestion. Fraxtal's FRAX-denominated gas is often cheaper for routine DeFi interactions (swaps, LP, borrowing) because the fee is set in FRAX and converted to ETH at efficient intervals by the sequencer. For purevalue transfers, Base's simplicity often results in lower fees. For DeFi activity involving multiple interactions, Fraxtal's integrated stack means fewer cross-chain bridging costs. As of 2026, Fraxtal's average DeFi transaction cost is approximately $0.02-0.05 in FRAX equivalent.
- What is the relationship between Fraxtal and Optimism?
- Fraxtal is built on the OP Stack (the same open-source software that powers Optimism and Base). This means it inherits Optimism's technical infrastructure: bedrock upgrade compatibility, cross-L2 communication via the Optimism Superchain, and the security model of Ethereum??. Being OP Stack means Fraxtal benefits from the same Proposer/Prover security assumptions as Optimism, and can tap into the Superchain's shared messaging infrastructure (Cannon MCP) for cross-chain composability. Fraxtal is not an Optimismsuperchain member in the governance sense, but it is technically built on the same stack.