logos-storage-nim-validator/codexvalidator/signatures.nim

import pkg/blscurve
import pkg/nimcrypto
import ./hashing

export blscurve.Signature
export blscurve.sign
export blscurve.verify

type
  Identity* = SecretKey
  Identifier* = PublicKey

proc random*(_: type Identity, identity: var Identity) =
  var randomness: array[32, byte]
  var done = false
  while not done:
    doAssert randomBytes(randomness) == randomness.len
    done = fromBytes(identity, randomness)
  burnMem(randomness)

func identifier*(identity: Identity): Identifier =
  doAssert publicFromSecret(result, identity)

func sign*(identity: Identity, hash: Hash): Signature =
  identity.sign(hash.data)

func verify*(signature: Signature, identifier: Identifier, hash: Hash): bool =
  identifier.verify(hash.toBytes(), signature)