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A Six-Year-Old Solc Riddle

Can we verify a piece of Ethereum antiquity by messing with the compiler?

Last October we got a request like no other, to verify the oldest NFT ever deployed on Ethereum. It was compiled using Solidity 0.1.5. That's more than 6 years old! By reverse-engineering the bytecode, and understanding the nondeterminism of the compiler (which is complex, but has to do with the memory allocator compiled into asm.js) we were able to reproduce the NFT's bytecode from source. The result allowed us to verify the contract on Etherscan and make our client happy.

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19.02.2024

Dedaub Showcases its Web3 Security Technology at ETHDenver 2024

At ETHDenver, Dedaub will showcase its advanced security technology solutions, discuss the safety of Web3 applications, build partnerships, and share insights to enhance security standards within the Web3 ecosystem.

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14.02.2024

Dedaub celebrates SEAL's public debut and the launch of the Safe Harbor initiative

SEAL | Dedaub, as a founding collaborator, celebrates SEAL's public debut, which marks a milestone in security. Read More.

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07.02.2024

Bulk Storage Extraction

If you work with nodes on Ethereum or other EVM networks, you may have needed to extract storage contents for a contract.

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