Function getValidSigners

getValidSigners(
    signatures: string[],
    message: string,
    pubkeys: string[],
): string[]
Returns the set of unique public keys that have produced a valid Schnorr signature for a given message.
Parameters
- signatures: string[]
  The Schnorr signature(s) (hex-encoded).
- message: string
  The message to verify.
- pubkeys: string[]
  The Cashu P2PK public key(s) (hex-encoded, X-only or with 02/03 prefix) to check.
Returns string[]
Array of public keys who validly signed, duplicates removed.
- Defined in src/crypto/core.ts:259