Private mempool on Ethereum: protect swaps & pool creation
How transactions on Ethereum 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.
How to turn it on
- Open ⚙ (slippage settings) in any Ethereum transaction dialog: Swap, Zap In, add liquidity or Create pool.
- In the "Private mempool (RPC)" section, press "Add to wallet" next to one of the available private RPCs.
- Approve it in your wallet. If the wallet rejects automatic setup (e.g. MetaMask for Ethereum Mainnet), copy the URL and add it manually: Settings → Networks → Ethereum → add RPC, and make it the default.
- From then on, swaps & deposits from your wallet on Ethereum go straight to builders instead of the public mempool. The BaniPool automation keeper already uses private RPCs with no setup.
Ethereum for liquidity providers
Ethereum has the deepest DeFi liquidity. Uniswap v2, v3 and v4 pools for major pairs (ETH, stablecoins, WBTC) carry high volume and set the reference price for other networks. Gas is the most expensive of the supported networks — depositing, claiming and re-ranging can cost several dollars per transaction. Best for larger capital and ranges you do not adjust too often.
The mempool on Ethereum
Ethereum has a public mempool: pending transactions are visible to everyone, so swaps and deposits with loose slippage are exposed to sandwiches and front-running. On BaniPool, automation keeper transactions are sent through Flashbots Protect and MEV Blocker (straight to builders, never broadcast publicly). For transactions from your own wallet, add those private RPCs to your wallet in one click from ⚙ in any transaction dialog.
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 Ethereum supported by BaniPool
Top Ethereum pools (TVL)
| Pool | DEX | Fee | TVL | Fee APR |
|---|---|---|---|---|
| USDC / WETH | Uniswap v3 | 0.05% | $79.1M | 80.5% |
| WETH / USDT | Uniswap v3 | 0.3% | $76.3M | 72.6% |
| USDC / WETH | Uniswap v3 | 0.3% | $42.6M | 30.1% |
| USDC / USDT | Uniswap v3 | 0.01% | $33.6M | 14.3% |
| USDC / WETH | Uniswap v2 | 0.3% | $17.9M | 10.4% |
| WETH / USDT | Uniswap v2 | 0.3% | $12.9M | 10% |
| ETH / USDT | Uniswap v4 | 0.3% | $12.8M | 21.1% |
| WETH / USDT | Uniswap v3 | 0.05% | $12.8M | 60.2% |
| ETH / USDC | Uniswap v4 | 0.3% | $10.3M | 28% |
| USDC / WETH | Uniswap v3 | 0.01% | $7.9M | 19.3% |
FAQ
Does Ethereum 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.