How to use Uniswap on Base network? (Ecosystem Guide)

Connecting Your Wallet to Base

1. Ensure your wallet supports the Base network—MetaMask is the most widely used option.

2. Open MetaMask and click the network selector in the top-right corner.

3. Search for “Base” and select it from the list; if unavailable, manually add Base using its RPC details: https://mainnet.base.org, chain ID 8453, symbol ETH, block explorer https://basescan.org.

4. Confirm the network addition prompt and wait for MetaMask to sync with Base’s latest block.

5. Verify your wallet address remains unchanged after switching networks—only the underlying blockchain context shifts.

Accessing Uniswap Interface on Base

1. Navigate to https://app.uniswap.org using a desktop or mobile browser.

2. Click “Connect Wallet” in the top-right corner and choose MetaMask or another supported wallet.

3. Approve the connection request—no transaction fee is required at this stage.

4. Confirm the interface displays “Base” as the active network next to your wallet address.

5. If the network shows incorrectly, click the network name and manually switch to Base before proceeding.

Swapping Tokens via Uniswap v3 on Base

1. Click the “Swap” tab on the Uniswap interface to open the trading panel.

2. Select input token—Base natively supports ETH, USDC, DAI, WETH, and many ERC-20 tokens deployed on Base.

3. Enter the amount you wish to swap; the interface will display slippage tolerance, price impact, and estimated output.

4. Adjust slippage tolerance if needed—most users keep it between 0.5% and 1.0% due to Base’s low volatility and high liquidity in core pools.

5. Click “Confirm Swap”, review the transaction summary, then approve the signature request in your wallet.

Liquidity Provision on Base Pools

1. Navigate to the “Pool” tab and click “Add Liquidity” to begin depositing assets into an existing Uniswap v3 pool.

2. Choose two compatible tokens—only pairs listed on Base’s Uniswap deployment are available, such as ETH/USDC or WETH/DAI.

3. Set the price range for concentrated liquidity; narrower ranges yield higher fees but carry greater risk of being out-of-range.

4. Input amounts for both tokens—the interface auto-balances based on current oracle price and your selected range.

5. Review the position NFT preview, gas estimate, and fee tier (0.05%, 0.30%, or 1.00%), then confirm the transaction in your wallet.

Frequently Asked Questions

Q: Do I need ETH on Base to pay for gas?A: Yes. Base uses ETH as its native gas token. You must hold ETH on Base—not Ethereum Mainnet—to cover transaction fees.

Q: Can I use my Ethereum Mainnet Uniswap positions on Base?A: No. Liquidity positions and swaps on Base exist independently. Base is a separate L2 chain with its own state, contracts, and token deployments.

Q: Are Uniswap governance tokens (UNI) claimable on Base?A: UNI is not distributed or airdropped on Base. The UNI token exists only on Ethereum Mainnet and select other chains where it has been officially deployed.

Q: Why does my token balance show zero after switching to Base?A: Token balances are chain-specific. You must bridge assets to Base using official bridges like the Base Bridge or Coinbase Wallet Bridge before they appear in your wallet.