Cross-chain · Avalanche C-Chain → Base

Swap AVAX from Avalanche C-Chain to USDC on Base

Swap AVAX from Avalanche C-Chain to USDC on Base. Native AVAX leaves C-Chain, and Circle USDC is what can arrive on Base.

The source is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, native AVAX on chain id 43114, visible on Snowtrace as gas rather than as an ERC-20. Circle's USDC on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, chain id 8453, visible on Basescan. That is not bridged USDbC, not Tether, and not ETH. You are selling the C-Chain fee coin, so a remainder of AVAX has to stay behind for the transaction itself.

Diagram for Swap AVAX from Avalanche C-Chain to USDC on Base
AVAX leaves Avalanche C-Chain. USDC is what can arrive on Base.

The fee and the asset are the same AVAX stack

There is no separate approval for the sentinel. There is a fee taken from the coin you are selling. Size the trade after you reserve gas on chain id 43114. X-Chain and P-Chain AVAX never qualify, even when a portfolio view lumps all Avalanche balances together. Snowtrace on C-Chain is the record that matters. If the network in the wallet is not 43114, you are looking at a different account.

Circle on Base is not the legacy bridged dollar

0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is native USDC. USDbC is the older bridged contract, and a deposit form that still names it will reject this arrival. Tether is a different issuer again. Basescan is how you show a counterparty the exact token. Chain id 8453 must be selected or the wallet will hide a balance Basescan already confirms.

Dollars on an L2 do not include the gas

Base is an Ethereum L2. Fees are ETH. USDC will not pay them, and the AVAX you sold will not pay them either. Mainnet ETH, chain id 1, about 12 second blocks, Etherscan, is yet another balance. Plan a small ETH float on Base before you forward the USDC. The gas sentinel is not the USDC address, so do not paste 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 into a fee field.

Keep the swap on C-Chain when Base is not the destination that asked

A local dollar pair avoids the bridge when the receiver, the pool, or the lender is still on Avalanche. Cross to Base when someone named this Circle contract. Avalanche C-Chain is the side you are spending down. Compare minimum USDC with a stay-at-home quote and keep the one that preserves more of the dollar. The bridge does not publish a finish time.

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 AVAX from Avalanche C-Chain to USDC on Base?

The source is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, native AVAX on chain id 43114, visible on Snowtrace as gas rather than as an ERC-20. Circle's USDC on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, chain id 8453, visible on Basescan.

Should the whole AVAX balance go to Base USDC?

No. AVAX at 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE pays the fee on C-Chain, chain id 43114. Spending all of it stops the broadcast. Leave a remainder, then let Circle USDC arrive on Base. Snowtrace confirms the source. X-Chain AVAX cannot be used in its place. Do not send a second time while the first transfer is still open.

Is Base USDC the same as bridged USDbC?

No. This route delivers Circle at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on chain id 8453. USDbC is a different contract, and Tether is a different issuer. Check Basescan. If the form you are filling still asks for the bridged token, this arrival will not satisfy it. Confirm the contract on the explorer before you sign.

Does the USDC pay gas on Base?

No. Base is an Ethereum L2 and charges ETH, chain id 8453. USDC cannot pay that fee, and AVAX from C-Chain cannot either. Hold ETH before you move the dollars. Mainnet gas on chain id 1 is a separate ETH balance, checked on Etherscan, not on Basescan.

Live execution

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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.

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