Blast bridge moves ETH or supported stablecoins from Ethereum to Blast through a signed deposit and a credit on Blast. Once credited, ETH remains ETH, while supported stablecoins become USDB, Blast’s dollar-linked token. Before starting, know that Blast announced on 2 October 2026 that it is winding down and asked users to withdraw to Ethereum.
What is the Blast bridge?
It is a way to move assets between Ethereum and Blast, an Ethereum layer 2 network. A layer 2 handles transactions on its own network while using Ethereum as its base. The bridge records your deposit on Ethereum, then makes the corresponding balance available on Blast.
Blast was built to give ETH and USDB holders native yield: their balances can grow without a separate deposit into an earning product. L2BEAT describes how Blast puts assets held by its Ethereum bridge to work to generate that yield. With the network winding down, yield alone is no longer a sensible reason to move funds in.
What happens between signing and arrival?
Your wallet signature gives permission for a transaction; it does not mean the transfer has finished. Start with the asset in your wallet on Ethereum and enough ETH there to pay gas, the network processing fee. Check the destination network and the amount you expect to receive before you sign.
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Approval, if needed: A stablecoin may first need a separate approval. This lets the bridge contract use the amount you allow. Approval can require its own Ethereum transaction and gas fee.
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Deposit: You sign the bridge transaction in your wallet. Ethereum broadcasts it, and you receive a transaction hash: an identifier you can use to check its status.
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Ethereum confirmation: The deposit is included in an Ethereum block. The bridge can then recognise the locked funds and pass the deposit information to Blast.
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Blast credit: The matching balance appears on Blast, usually at the same wallet address. You may need to switch your wallet’s network view to see it.
An approved stablecoin with no deposit transaction has not crossed the bridge. Likewise, an Ethereum deposit marked successful may still be waiting for its Blast credit. Check the transaction hash and your Blast balance before signing again; a second deposit would move more funds.
If you must bridge ETH to Blast for a specific remaining task, check the direction first. For that inbound move, choose Blast bridge to move ETH or stablecoins from Ethereum to Blast; someone with funds already on Blast needs a withdrawal to Ethereum instead. Confirm that deposits are still available during the wind-down before signing.
Why do bridged stablecoins become USDB on Blast?
They become USDB because Blast uses its own dollar-linked token for the native yield system. When you bridge stablecoins from Ethereum to Blast through this route, the asset shown on arrival can therefore have a different name. Check the expected arrival asset before depositing, especially if another person or service expects a particular token.
Consider two deposits of equal value. Someone sending ETH expects ETH on Blast and needs a little ETH left on Ethereum for gas. Someone sending a supported stablecoin expects USDB on Blast and may need both an approval and a deposit transaction. USDB aims to track one dollar, but its value and redemption depend on its backing and the bridge.
How much does the Blast bridge cost?
The cost depends chiefly on Ethereum gas when you sign. Ethereum.org explains that gas is paid in ETH and changes with network demand. A stablecoin approval, when required, adds another transaction; any route fee or conversion difference should be visible in the amount quoted before you commit.
For example, if a wallet estimates 0.0001 ETH for approval and 0.0002 ETH for deposit, that is 0.0003 ETH in gas. Those figures are illustrative, not a current quote. Keep enough ETH in your Ethereum wallet for every required transaction, even when the asset you are moving is a stablecoin.
How long does a transfer to Blast take?
An inbound transfer normally takes minutes: first Ethereum includes the deposit, then Blast credits it. Around five to ten minutes is a useful planning estimate under normal conditions, but congestion or bridge processing can extend it. A confirmed Ethereum deposit is evidence of progress, not proof that the Blast balance has arrived.
The return trip now matters more than the inbound wait. Blast said withdrawals would pause for about a week while it unwinds assets, then resume with a 24-hour delay. It set 26 October 2026 as the last day for withdrawals through its normal interface; afterward, it says users will need to use its Ethereum bridge contracts directly.
Check the arrival asset and each transaction stage before moving anything. If you already hold funds on Blast, follow its announced withdrawal timetable. If you are considering a new deposit, allow for the time and steps needed to get those funds back.