package types

import (
	"math/big"

	"github.com/minio/blake2b-simd"
)

type Ticket struct {
	VRFProof []byte
}

func (t *Ticket) Quality() float64 {
	ticketHash := blake2b.Sum256(t.VRFProof)
	ticketNum := BigFromBytes(ticketHash[:]).Int
	ticketDenu := big.NewInt(1)
	ticketDenu.Lsh(ticketDenu, 256)
	tv, _ := new(big.Rat).SetFrac(ticketNum, ticketDenu).Float64()
	tq := 1 - tv
	return tq
}