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I recovered 1.55 ETH from a type-casting bug in a 2021 crypto wallet

by robikscube·Mar 17, 2026·3 points·1 comment
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AI Analysis

●●SolidDark HorseWizardry

Reverse-engineered a type-casting bug to recover 1.55 ETH from a 2021 wallet.

Strengths
  • •Forensic analysis identifies exact bug: toString('hex') before fromMasterSeed instead of raw buffer.
  • •Recovery scripts include air-gap security guidance for safe private key extraction.
  • •Educational value for understanding BIP39 seed derivation and common crypto implementation errors.
Weaknesses
  • •Extremely niche audience—only affects CoinSpace v3.0.7 users from early 2021.
  • •Not an ongoing tool—single-use recovery scripts rather than a maintainable product.
Category
Security
Target Audience

CoinSpace wallet users from 2021 who lost access to funds

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