code: func ImportECDSAPublic(pub *ecdsa.PublicKey) *PublicKey {
  	return &PublicKey{
  		X:      pub.X,
  		Y:      pub.Y,
  		Curve:  pub.Curve,
  		Params: ParamsFromCurve(pub.Curve),
  	}
  }
docs: // Import an ECDSA public key as an ECIES public key.