Solana's Pubkeys are of which representation of Curve25519?

Question

I wanted to know this: Are solana pubkeys EdwardsPoint or Montgomery representation of curve25519?

Answer 1

The solana glossary writes

The key may be one of:

• an ed25519 public key
• a program-derived account address (32byte value forced off the ed25519 curve)
• a hash of an ed25519 public key with a 32 character string

Or, to directly answer your question: Solana pubkeys use points on the Edwards representation of Curve25519 in the first case of the above definition.