public_key.go

package bls

import (
	"encoding/hex"
	bls12381 "github.com/kilic/bls12-381"
	"math/big"
)

type PublicKey struct {
	value *bls12381.PointG1
}

func NewPublicKey(data []byte) (PublicKey, error) {
	value, err := bls12381.NewG1().FromCompressed(data)
	if err != nil {
		return PublicKey{}, err
	}
	return PublicKey{
		value: value,
	}, nil
}

// FingerPrint 生成指纹
func (key PublicKey) FingerPrint() string {
	return new(big.Int).SetBytes(Hash256(bls12381.NewG1().ToCompressed(key.value))[:4]).String()
}

// Bytes 转成bytes
func (key PublicKey) Bytes() []byte {
	return bls12381.NewG1().ToCompressed(key.value)
}

// Hex 转成hex string
func (key PublicKey) Hex() string {
	return "0x" + hex.EncodeToString(key.Bytes())
}

// G1 获取G1
func (key PublicKey) G1() *bls12381.PointG1 {
	return key.value
}

// Add 组合公钥
func (key PublicKey) Add(pk PublicKey) PublicKey {
	g1 := bls12381.NewG1()
	return PublicKey{
		value: g1.Add(g1.New(), key.value, pk.G1()),
	}
}