Ethereum layer-2 network Blast announced on Oct. 2 that it will shut down its chain, saying maintenance costs now exceed what the network earns and that it sees no credible path to economic sustainability.

The project set an Oct. 26 deadline for users to move assets back to Ethereum mainnet through its standard withdrawal interface. In its shutdown announcement, Blast said it plans to wind the network down through an asset withdrawal process that will temporarily interrupt users' ability to exit.

The decision arrives nearly three years after Blast disclosed $20 million in funding from Paradigm and Standard Crypto on Nov. 20, 2023. The network opened early access that November, with a mainnet launch planned for February 2024 at the time.

Blast's documented design describes an Ethereum-compatible optimistic rollup that passes yield from ETH staking and real-world-asset protocols through to users. The project's website identifies Lido and MakerDAO as yield sources. The model was intended to let holders capture returns generated by those underlying protocols. Blast now says those operating economics no longer justify keeping the chain running.

The withdrawal mechanics

The unwind begins with Blast withdrawing its own assets from Lido, which its design identifies as a source of ETH staking yield. That process is expected to take approximately one week, according to the announcement.

User withdrawals will be unavailable during that period, even as the network reduces its withdrawal delay to 24 hours. Once the Lido unwind is complete, withdrawals will resume under the new 24-hour delay. The roughly one-week interruption and the post-reopening delay are separate components of the exit timetable.

The request to move funds covers balances held in Blast's web app, which the announcement refers to as the PWA. Blast encouraged all users to withdraw before Oct. 26.

After the deadline, assets will remain withdrawable, but users will need to interact directly with Blast's bridge contracts on Ethereum mainnet rather than through the project's interface. Blast said it will publish detailed instructions for that route before the cutoff date.

The announcement gives an approximate duration for the Lido unwind but does not specify an exact date when normal withdrawals will resume, leaving users to monitor the project's communications during the transition window.

The closure removes one of the more prominent experiments in native-yield rollup design from the market. Blast's approach — routing base-layer staking and real-world-asset returns directly to layer-2 users — attracted significant backing at launch, but the project has now concluded that the revenue generated cannot cover the cost of operating the chain.

For users, the operational consequence is concrete: a withdrawal window of roughly three weeks from the announcement, a one-week pause during the Lido unwind, and a shift to manual bridge-contract interaction after Oct. 26. Holders who miss the interface deadline will still be able to recover funds on Ethereum mainnet, but at the cost of direct contract interaction and the associated execution risk.

The shutdown also unwinds Blast's positions within the broader DeFi stack. Its reliance on Lido and MakerDAO as yield sources means the closure process itself touches those protocols, with the roughly weeklong Lido withdrawal forming the first step of the wind-down.

Blast has committed to publishing bridge-contract withdrawal instructions before Oct. 26, the date after which the network's normal exit route closes and mainnet contract interaction becomes the only path out.