OpenSea Opts for Ethereum Proof-of-Stake Post Merge

  • OpenSea processed $31 billion in trading volume since its inception
  • Other platforms won’t necessarily follow OpenSea’s selective stance, a crypto exec told Blockworks

OpenSea will support the proof-of-stake Ethereum chain once the network’s highly-anticipated upgrade — the Merge — is completed. 

The Ethereum Merge will shift the blockchain from its current proof-of-work consensus to a more environmentally friendly version which is 99.9% more energy efficient. The event — expected to occur on or about Sept. 15 — has driven many crypto platforms to gear up for the change.

“First, and most importantly, we are committed to solely supporting NFTs on the upgraded Ethereum PoS chain,” OpenSea said in a Twitter thread on Thursday.

It also referenced potential Ethereum PoW forks that may try to launch alternative chains. Notably, existing non-fungible tokens (NFTs) on the Ethereum proof-of-work mechanism will no longer be supported or reflected in OpenSea’s marketplace.

OpenSea is the largest NFT marketplace for crypto collectibles on the Ethereum blockchain and has touched $31 billion in trading volume since its December 2017 launch, DappRadar data shows.

Many have branded Ethereum’s upcoming transition as a defining moment for the blockchain space. Most platforms that currently run on Ethereum will also support the PoS chain because not doing so would effectively cut them out of the ecosystem, according to Asaf Naim, CEO of decentralized application developer Kirobo. 

“However, I do not expect these platforms to follow OpenSea’s selective stance,” Naim told Blockworks. “I expect we will see these platforms inclined to also support a forked chain that remains on POW.”

“It is worth noting that any forked chain will lag behind the new PoS chain in terms of both use and price,” Naim added. 

Stablecoin provider Circle has taken a similar stance to OpenSea, saying it will solely support the PoS chain, and that its USDC coin can only exist as a single valid version. Combined with a similar decision by Tether regarding its USDT stablecoin, the lack of support is poised to wreak havoc on DeFi applications on the forked chain.

Web3 platforms prepare for the Merge

Several platforms apart from OpenSea have also announced contingency plans to support the transition. DeFi lending protocol Aave recently proposed halting ether borrowing until the Merge, pointing to potential issues in liquidation transactions due to high utilization. 

NFT marketplace LooksRare also announced its mitigation plan, saying it would go into maintenance mode shortly before the event. The plan is designed to prevent replay attacks by temporarily suspending trading until after the Merge. Absent such precautions, users who execute trades on an Ethereum PoW fork could be at risk of losing their NFTs on the post-Merge Ethereum PoS chain.

Crypto exchanges have also announced support for the Merge transition, but some may be more accommodating of Ethereum forks, unlike OpenSea. Coinbase will briefly pause new ether and ERC-20 token deposits and withdrawals as a precautionary measure.

Both Coinbase and Binance have said they will consider listing ETH PoW forks if they arise post-Merge.

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  • Shalini Nagarajan



    Shalini is a crypto reporter from Bangalore, India who covers developments in the market, regulation, market structure, and advice from institutional experts. Prior to Blockworks, she worked as a markets reporter at Insider and a correspondent at Reuters News. She holds some bitcoin and ether. Reach her at [email protected]