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Dan Romero
@dwr.eth
How Login in with Farcaster works - Farcaster relies on a root ECDSA <> FID mapping onchain; this can be stored in any Ethereum wallet - You use the ECDSA pair to create EdDSA keypairs for each app; this FID <> EdDSA mapping also lives onchain - Hubs natively understand this
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maurelian
@maurelian.eth
What are the properties of EdDSA keys that make them useful here?
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Varun Srinivasan
@v
EdDSA keys are my goto for generic signing - here's the rationale from when we designed Farcaster v1.
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maurelian
@maurelian.eth
And what’s the difference between the key and key bytes in the contract?
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Varun Srinivasan
@v
If you index a bytes value, solidity hashes it. We wanted it to be available in an indexed form but also in a readable form so emit it twice @horsefacts.eth discovered this
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