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B3 is a token deployed on Base, Coinbase's Ethereum layer-2 network, which means swaps settle with low fees and relatively fast finality compared to Ethereum mainnet. Users often swap into or out of B3 to participate in Base-native DeFi activity or to rebalance holdings within the Base ecosystem. Because B3 operates exclusively on Base, exchanges are straightforward for wallets already set up for that network.
Before swapping B3, confirm your receiving wallet supports the Base network — sending B3 to an address on a different network could result in lost funds. Since B3 runs only on Base, there is no network selection to make on either side of the swap, which simplifies the process. Confirmation times on Base can vary depending on network congestion, so allow some time after broadcast before assuming an issue. Zest shows the estimated output and rate before you confirm, so review those figures carefully prior to completing the exchange.
Base
