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November 11, 2026
Arbitrum One and OP Mainnet are Ethereum layer 2s where gas costs a few cents, so adding Uniswap liquidity there is far cheaper than on Ethereum mainnet. Both use a sequencer to order transactions, which makes sandwich attacks much rarer than in a public mempool; the most liquid pair is usually ETH/USDC.
BaniPool data as of November 13, 2026: the largest pool on Arbitrum is WETH/USDC (Uniswap v3) with $29.5M TVL.
Live data from the BaniPool index (pools with TVL ≥ $1M), refreshed every 30 minutes — full DeFi liquidity report
Add liquidity on Uniswap on Arbitrum One and OP Mainnet: how the two L2s differ, ETH/USDC pool APR data, gas of a few cents, and why sandwiches are rare there.
How to add liquidity on Arbitrum and Optimism is the middle ground between Ethereum's deep liquidity and cheap gas. Arbitrum One and OP Mainnet are the two oldest Ethereum L2s with large DeFi ecosystems, gas of a few cents, and no public mempool. BaniPool supports Uniswap v2, v3 and v4 pools on both. This guide compares the networks, shows the top pools, and walks through adding liquidity.
Arbitrum One
| Pool | Version | Fee | TVL | 24h volume | Fee APR |
|---|---|---|---|---|---|
| WETH/USDC | Uniswap v3 | 0.05% | $34.9M | $64.6M | ~26.8% |
| WETH/USDC | Uniswap v3 | 0.3% | $4.9M | $2.8M | ~52.9% |
| ETH/USDC | Uniswap v4 | 0.05% | $4.5M | $10.7M | ~43.3% |
| ETH/USDC | Uniswap v4 | 0.3% | $3.2M | $2.2M | ~76.2% |
OP Mainnet
| Pool | Version | Fee | TVL | 24h volume | Fee APR |
|---|---|---|---|---|---|
| USDC/WETH | Uniswap v3 | 0.3% | $4.4M | $3.8M | ~80.0% |
| USDC/WETH | Uniswap v3 | 0.05% | $0.27M | $0.5M | ~25.9% |
| WETH/OP | Uniswap v3 | 0.3% | $0.23M | $0.09M | ~36.4% |
Notably, on Arbitrum the Uniswap v4 ETH/USDC pools show higher APRs than v3 at the same fee — because v4 TVL is still smaller.
Both use ETH for gas.
Not needed. Arbitrum and OP Mainnet have no public mempool — transactions go straight to the sequencer.
Create a pool on Arbitrum or on OP Mainnet: the Uniswap pool is created and seeded in one transaction.
Arbitrum has far more volume and TVL on major pairs. OP Mainnet is smaller, so some pools show higher APRs but with thinner liquidity.
About 7 days via the native bridge. Fast bridges like Across (used by BaniPool) finish in minutes for a small fee.
No. Without a public mempool, classic sandwiches are very hard.
Add liquidity on Base with Uniswap v3/v4 or Aerodrome: key differences, top pool APR data, Zap In with ETH, AERO rewards, and why Base needs no private mempool.
Add liquidity on Arc, Circle's EVM network that pays gas in USDC: the USDC/EURC pool, Uniswap v3/v4, instant finality, and the chance to create the first pools.
Add liquidity on Uniswap on Ethereum mainnet: check whether fees beat gas, choose a fee tier, top pool APR data, and protect transactions with Flashbots Protect.