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PSA: CoinSpace/CoinWallet v3.0.7 (2021) has a derivation bug that made it provide the WRONG seed phrase. My recovery script inside.

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Seen some past posts that people had lost their wallets and this might help those people!

If you created a wallet with CoinSpace (now Coin Wallet) around early 2021 and your seed phrase generates a completely different address in MetaMask or any standard tool... you're not crazy. The software had a bug.

CoinSpace v3.0.7 (and maybe other versions) incorrectly derived wallet addresses from your seed phrase due to two compounding errors in the code. Your seed phrase can be recovered - but not using it directly. the app just used a broken algorithm to turn it into an address, one that no standard wallet tool replicates.

CoinWallet is aware of part of the issue and will point you to a derivation path fix if you report it, but that fix alone doesn't work. The recovery script in the repo handles it correctly.

I hit this when I needed to recover 1.55 ETH from a wallet I created in Feb 2021. After weeks of forensics I found the bug and wrote a recovery script.

Recovery script: https://github.com/RobMulla/coinspace-eth-recovery

Full long writeup about my journey: https://robmulla.substack.com/p/how-my-sons-roblox-mod-helped-me

If you're affected, and this works for you please let me know! Or if you knew about this already... I'm curious to know if I'm not the only one.

submitted by /u/robikscuber
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