Blast Bridge: Exchange and Wallet Deposits Explained

Blast bridge deposits can reach Blast from an exchange or a wallet you control. Blast is an Ethereum layer 2, a network built on Ethereum; a Blast bridge deposit moves assets onto that network. The official bridge currently shows withdrawals to Ethereum only, so check that a deposit route is open before sending funds.

How Does the Blast bridge Work From an Exchange?

An exchange can send ETH straight to Blast if it offers withdrawals on the Blast network. In the exchange’s withdrawal screen, select ETH, then select Blast as the network. Enter your own Blast wallet address and review the fee, minimum amount, and amount you will receive.

For example, suppose you hold 0.5 ETH on an exchange. If its displayed withdrawal fee is 0.001 ETH, you would expect about 0.499 ETH at your Blast address. That fee is an example; the amount on the withdrawal screen is the one that matters.

The exchange sends from its own wallet and handles the transfer onto Blast. You cannot connect an exchange account to a bridge and sign with its balance yourself. A listed ETH balance also does not mean the exchange still supports Blast withdrawals, so check the network choice before making plans.

If Blast is unavailable, you could withdraw ETH to an Ethereum wallet you control and then use an open deposit route. That adds an exchange withdrawal fee and an Ethereum transaction fee. It is only an option if the deposit route itself is working; sending ETH on Ethereum to the same-looking address will not put it on Blast.

How Does a Self-Custody Wallet Deposit Work?

A self-custody wallet deposit starts with ETH in an Ethereum wallet whose access keys you control. Where a deposit route is open, you connect that wallet, choose ETH and Blast, and review the destination and amount. You then approve the transaction in your wallet.

The bridge transaction holds the ETH on Ethereum and credits the corresponding amount on Blast after confirmation. Your wallet shows balances by network, so switch it to Blast to check arrival. Keep some ETH on Ethereum to pay the transaction fee, called gas, instead of trying to send your full balance.

This route gives you control over the transaction and its destination. It also makes you responsible for checking the live route and confirming the network in your wallet. If your ETH starts on an exchange, first moving it to your Ethereum wallet adds a step that a direct Blast withdrawal could avoid.

Which Route Costs Less and Gets There Sooner?

Compare the ETH you will receive, the fees for every step, and whether each step is currently available. A direct exchange withdrawal has the fee shown by that exchange. When enabled, it may arrive within minutes, but the exchange can take longer to process or pause withdrawals.

A wallet deposit usually appears on Blast minutes after its Ethereum transaction confirms. Its main cost is Ethereum gas, which rises and falls with demand. For example, a transaction using 150,000 gas at 5 gwei costs 0.00075 ETH; at 20 gwei, it costs 0.003 ETH. Gwei is a small unit of ETH, and those figures are examples, not a quote.

Using the earlier 0.5 ETH example, a 0.001 ETH direct exchange fee beats a 0.0005 ETH withdrawal to Ethereum plus 0.00075 ETH in bridge gas. At a higher gas rate, the gap grows. Check both live amounts before deciding, especially for a small deposit.

Consider the return trip too. The Blast L2 bridge currently shows a one-day wait for ETH withdrawals to Ethereum. Its process also requires you to prove the withdrawal and later claim the ETH, with ETH on Ethereum to pay those gas fees. USDB can take an additional day and arrive as a different asset, so check the displayed received asset before planning an exchange deposit.

The deciding check today is availability. Blast’s official screen offers withdrawals to Ethereum, so neither an exchange balance nor a wallet balance proves you can make a new deposit. If you already hold assets on Blast, follow the withdrawal status through the final claim rather than assuming the first transaction completes the transfer.

• Check that the exchange network or wallet deposit route is open.
• Compare the final ETH amount after every withdrawal fee and gas charge.
• Check the return steps and received asset before sending.