package pnyx

import (
	"crypto/ed25519"
	"crypto/rand"
	"crypto/sha512"
)

type Client struct {
  Key ed25519.PrivateKey
}

func KeyID(key ed25519.PublicKey) ClientID {
  hash := sha512.Sum512([]byte(key))
  return (ClientID)((hash)[0:16])
}

func(client Client) ID() ClientID { 
  return KeyID(client.Key.Public().(ed25519.PublicKey))
}

func NewClient(key ed25519.PrivateKey) (Client, error) {
  if key == nil {
    var err error
    _, key, err = ed25519.GenerateKey(rand.Reader)
    if err != nil {
      return Client{}, err
    }
  }

  return Client{
    Key: key,
  }, nil
}