Cross-chain · Base → Avalanche C-Chain
Swap ETH from Base to AVAX on Avalanche C-Chain
Swap ETH from Base to AVAX on Avalanche C-Chain. Native ETH leaves Base, and native AVAX arrives on the C-Chain, chain 43114.
Both sides use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, and that string is not one coin. On Base, chain 8453, it is ETH, the L2 gas coin, shown on Basescan as the account balance. On Avalanche it is AVAX, shown on Snowtrace as the C-Chain account balance. It is not an ERC-20. It is not the X-Chain and not the P-Chain. Leave some Base ETH for the fee. You are changing exposure from ether to AVAX, not wrapping ether.
Two gas coins, one placeholder
Do not drain Base, and do not use the X-Chain
AVAX is not a dollar and not WETH
How to see the credit
Legal
Risk disclosure
XAUConnect is a non-custodial swap aggregator. Digital assets are volatile and may lose value rapidly. Content on this page is educational and not investment advice. Verify every contract address on the official block explorer before approving a transaction.
Frequently asked questions
What is the best way to swap ETH from Base to AVAX on Avalanche C-Chain?
Both sides use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, and that string is not one coin. On Base, chain 8453, it is ETH, the L2 gas coin, shown on Basescan as the account balance.
Why do ETH and AVAX share an address in the quote?
They do not share a contract. 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE means the native gas coin of the selected chain. On Base that is ETH. On the C-Chain that is AVAX. Snowtrace and Basescan show two account balances. Chain ids 8453 and 43114 keep them apart. The X-Chain does not use this placeholder the same way.
Does this AVAX land on the X-Chain?
No. The credit is native AVAX on the C-Chain, chain 43114. An export from the C-Chain to the X-Chain is a separate Avalanche action, not this route. If your wallet is showing an X-Chain address, switch to the C-Chain account before you decide the funds are missing.
What if I spend my entire Base ETH balance?
The chain 8453 fee cannot be paid, so the swap should fail before it is broadcast. Leave a remainder. Native ETH is sent, not approved. If your ether is WETH, unwrap it on Base first or use the WETH route. This page only sees the gas coin.
Trade on XAUConnect
Open the swap page with this cross-chain route pre-selected, then connect your wallet on the source chain to quote and execute. You keep the keys.
Continue exploring
Related markets, guides & networks
Next pages on this subject. Read them before you trade.
Swap ETH
Swap Ether (ETH) on Base. Base quotes on XAUConnect, with the fee and the minimum you receive shown before you sign. You
Swap USDC
Swap USD Coin (USDC) on Base. Base quotes on XAUConnect, with the fee and the minimum you receive shown before you sign.
Swap AERO
Swap Aerodrome (AERO) on Base. Base quotes on XAUConnect, with the fee and the minimum you receive shown before you sign
Swap WETH
Swap Wrapped Ether (WETH) on Base. Base quotes on XAUConnect, with the fee and the minimum you receive shown before you
What is an automated market maker (AMM)?
AMMs replace order books with liquidity pools and a pricing formula. Constant-product math, why prices move per trade, a
How do cross-chain bridges work?
A bridge locks or burns an asset on the source chain and releases a different contract on the destination. You need gas
Build programmatically
Swap via API for bots and AI agents: quotes, builds, and cross-chain routes.