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Optimism layer‑2 suffers a $35 million token loss after 20 million OP were sent to the wrong address and stolen, highlighting security risks for Ethereum
Optimism’s native OP token suffered a $35 million loss when 20 million tokens were mistakenly sent to an unsynced Ethereum address and promptly stolen by a hacker on June 1 2024 [2].
| At a glance | |
|---|---|
| Token | OP |
| Tokens lost | 20 million |
| Approx. value lost | $35 million |
| Catalyst | Mis‑routed transfer to unsynced L2 address leading to hack |
Optimism, an Ethereum layer‑2 scaling solution, intended to airdrop 20 million OP tokens to its DAO stakeholders via market maker Wintermute. The transfer was sent to Wintermute’s Ethereum (L1) address, but because the address had not been linked to an Optimism (L2) address, the tokens remained on L1 and were inaccessible. Within 24 hours, an anonymous actor seized the entire 20 million‑token batch, selling 1 million on the market while retaining the remaining 19 million [2].
Wintermute confirmed the error on May 30 and later disclosed that the stolen tokens could not be recovered through a high‑risk operation. The market maker has since repurchased the 1 million OP tokens sold by the hacker, but the remaining 19 million remain missing. Optimism reports that the stolen tokens have not yet been used to influence DAO governance, though the incident underscores the heightened risk profile of layer‑2 operations that bypass Ethereum’s congested mainnet [2].
The hack illustrates that while layer‑2 solutions promise faster, cheaper transactions, they also introduce new vectors for loss when address synchronization fails, raising questions about the robustness of scaling infrastructure as Ethereum adoption grows.
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AI-assisted synthesis by the TrendWatcher Editorial Desk · sourced from 2 outlets · Jul 16, 2026 · How we report
Layer 2 Scaling improves blockchain performance by moving transaction processing off the main chain, which reduces the load on Layer 1 blockchains like Ethereum. These solutions group transactions together and submit them to the main blockchain periodically, resulting in lower fees and increased transaction throughput.
ZK-Rollups in Layer 2 Scaling use cryptographic zero-knowledge proofs to verify transaction validity instantly, while Optimistic Rollups assume transactions are valid unless a fraud proof is submitted during a challenge period. ZK-Rollups are generally more computationally intensive, whereas Optimistic Rollups are noted for their native EVM compatibility and simpler development requirements.
Unichain is a Layer 2 Scaling solution because it operates as a separate blockchain that works alongside Ethereum to process smart contract execution. As of October 2024, Unichain is in the testnet phase and aims to lower transaction costs by 95% compared to the Ethereum mainnet.