An Ethereum developer recovered 1,003.62 ETH, worth approximately $2 million, from HongCoin's 2016 initial coin offering contract on Sunday after the funds had been stuck for nine years due to a smart contract bug. The developer, known as 0xFlorent_, identified a workaround that allowed HongCoin's team to unlock refunds for 48 original investors whose ETH had been frozen when the project's refund function broke after missing its funding goal. The recovery highlights ongoing vulnerabilities in early Ethereum smart contracts, as decentralized finance attacks have resulted in more than $840 million in losses during the first five months of 2026.
Developer Unlocks Frozen ETH Using Smart Contract Workaround
0xFlorent_ announced the recovery in a tweet Sunday, explaining that HongCoin's 2016 ICO contract was designed to refund investors after the project failed to meet its funding target, but a bug disabled the refund mechanism. The developer discovered that the contract had relied on an incorrect number to determine refund eligibility, preventing investors from accessing their ETH for nine years.
The whitehat developer created a workaround that allowed the contract to recognize blocked investors and release their funds. HongCoin's team subsequently executed 41 unlock transactions to distribute the recovered ETH. 0xFlorent_ provided Etherscan records of the contract and unlocked wallet as on-chain verification of the recovery.
Initial coin offerings were a common fundraising method during Ethereum's early years, where investors sent ETH to smart contracts in exchange for project tokens. Smart contracts are programs that run on the Ethereum blockchain and can continue operating indefinitely after projects cease activity.
DeFi Sector Faces $840 Million in Losses Across 2026
The recovery occurred as attacks on the decentralized finance sector continue, with more than $840 million lost in the first five months of 2026. April alone accounted for more than $600 million in stolen funds, according to the source.
Whitehat security researchers like 0xFlorent_ identify vulnerabilities in blockchain systems to protect networks or recover funds, distinguishing their work from malicious actors who exploit bugs to steal assets.
Experts Assess Rarity of Smart Contract Fund Recoveries
Andy Yajin Zhou, associate professor at the Chinese University of Hong Kong and co-founder of on-chain security firm BlockSec, told Decrypt that recoveries like the HongCoin case remain "unique" and do not indicate that large amounts of lost funds "could just routinely be recovered."
"The recovery was possible because the contract happened to contain a vulnerability that allowed a whitehat developer to safely extract and return the funds," Zhou said. "Unfortunately, we cannot assume that old Ethereum contracts generally have such flaws."
Zhou noted that locked funds often remain inaccessible due to "lost keys or irreversible contract logic," and no reliable estimate exists for the total amount of ETH permanently trapped in old contracts.
Dominick John, analyst at Zeus Research, told Decrypt that the case demonstrates some funds previously considered "lost" may still be recoverable and shows that smart contracts are not necessarily "dead ends." John added that improved security research and blockchain tools could help recover more stranded assets from old on-chain systems, potentially unlocking "dormant value" while exposing "limitations" in earlier smart contract design.
FAQ
What did 0xFlorent_ recover from the HongCoin ICO contract?
0xFlorent_ recovered 1,003.62 ETH, worth approximately $2 million, from HongCoin's 2016 ICO contract on Sunday. The funds had been stuck for nine years due to a smart contract bug that broke the refund function after the project missed its funding goal.
Why did the HongCoin contract fail to refund investors?
The HongCoin contract relied on an incorrect number to determine which investors were eligible for refunds, preventing 48 original investors from accessing their ETH. 0xFlorent_ identified this flaw and created a workaround that allowed the contract to recognize blocked investors, after which HongCoin's team executed 41 unlock transactions.
How common are recoveries of funds from old smart contracts?
Andy Yajin Zhou of BlockSec told Decrypt that such recoveries remain "unique" and cannot be routinely replicated. The HongCoin recovery was possible because the contract contained a specific vulnerability that a whitehat developer could exploit safely, but most old Ethereum contracts do not have such flaws, and many locked funds remain inaccessible due to lost keys or irreversible contract logic.
