How to recover publicKey from signature + known message?

Question

I'm implementing a sign in with Solana, and i'm trying to recover the user's publicKey from their signature + the known message they signed.

I know for Ethereum, ethers provides a method to do this, but I can't seem to find the equivalent on Solana.

If your question is answered, please mark it as accepted: stackoverflow.com/help/someone-answers — C.OG, Commented Aug 16, 2022 at 8:48

C.OG · Accepted Answer · 2022-08-16 08:47:43Z

1

Solana uses the ed25519 signature scheme. You can use any JS lib that implements ed25519 to handle signing/verifying etc

I couldn't find one that implements a public key recovery, though according to this post, its mathematically possible

answered Aug 16, 2022 at 8:47

C.OG

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