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0xflorent.eth Profile picture
0xflorent.eth
@0xFlorent_
Punk#3315 | Builder and explorer 🤠
Jun 21 • 4 tweets • 2 min read
I solved a 0.5 ETH cryptographic puzzle on Ethereum, unsolved for 8 years, with the answer hiding in plain sight.

Three more of the same kind remain open, worth 2 ETH combined. Image The puzzle is a TeikhosBounty contract, deployed in 2018.

The mechanic: the contract stores a masked ECDSA signature. Submit the right 64-byte public key, it verifies via ecrecover, and self-destructs sending you the ETH. The contract pays whoever solves it.