Private mempool on Arbitrum One: protect swaps & pool creation
How transactions on Arbitrum One can be seen by bots before they land — and what BaniPool does to protect your swaps, Zaps and pool creation.
Sandwiches, front-running and snipers
Sandwich: a bot buys right before your swap (pushing the price up) and sells right after — you get the worst price your slippage allows. Sniper: a bot buys into a new pool before its creator finishes seeding it. Both require seeing your transaction before it lands.
Arbitrum One for liquidity providers
Arbitrum One is an Ethereum L2 (optimistic rollup) with a large DeFi ecosystem. Uniswap v3 pools for ETH, ARB and stablecoins are among the most liquid on any L2. Gas is paid in ETH and is usually just a few cents.
The mempool on Arbitrum One
Arbitrum has no public mempool: the sequencer orders transactions by arrival time (with an auctioned Timeboost express lane). Classic sandwiches are hard, so an extra private mempool is not needed.
Honest limits
A private mempool hides a transaction before it lands, not after: once confirmed, the transaction and pool are public on-chain. Block producers (validators / builders) still see it. Sensible slippage is still needed.
DEXes on Arbitrum One supported by BaniPool
Top Arbitrum One pools (TVL)
| Pool | DEX | Fee | TVL | Fee APR |
|---|---|---|---|---|
| WETH / USDC | Uniswap v3 | 0.05% | $29.5M | 40.9% |
| WETH / USDC | Uniswap v3 | 0.3% | $4.1M | 57.4% |
| ETH / USDC | Uniswap v4 | 0.05% | $4M | 54.5% |
| ETH / USDC | Uniswap v4 | 0.3% | $3.1M | 85.9% |
| WETH / ARB | Uniswap v3 | 0.05% | $1.5M | 41.6% |
| WETH / ARB | Uniswap v3 | 0.3% | $226.3K | 21% |
| ARB / USDC | Uniswap v3 | 0.3% | $211.7K | 40.5% |
| ETH / ARB | Uniswap v4 | 0.3% | $182.2K | 24.4% |
| ARB / USDC | Uniswap v4 | 0.3% | $177.7K | 5% |
| WETH / USDC | Uniswap v3 | 1% | $133.4K | 36.4% |
FAQ
Does Arbitrum One have a public mempool?
Is the transaction really hidden?
Hidden from the public until it lands. After that it is visible like any other transaction on the explorer — what is prevented is bots reacting before your transaction executes.
How much does it cost?
On Solana just a small Jito tip per transaction (capped at 0.0001–0.002 SOL). On Ethereum & BNB the private RPCs (Flashbots Protect, MEV Blocker, PancakeSwap MEV Guard, BlockRazor) are free — you only pay normal gas. BaniPool adds no fee for this feature.