package main

import (
	"crypto"
	"crypto/rand"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"github.com/golang/protobuf/ptypes"
	"github.com/tjfoc/gmsm/sm2"
	"log"
	"math/big"
	"standard/json/pb"
)


func main()  {
	pubkey := "02e04ceeee7c25240de0d510ac1977ee50633d3494ac9a08481daeca3f288c8c50"
	privkey := "7785e7029108b80f2d8d0576bdac3bf554bb756aa523a42c3a62996089b91f6b"


	ichain := &pb.Body{ChainId: "zx00001", ChainName: "zx", ChainIntro: "test for zx"}

	body, err := ptypes.MarshalAny(ichain)
	pk := &pb.PublicKey{Type: "sm2", Key: pubkey}
	signerInfo := pb.SignerInfos{PublicKey: pk}
	signerInfos := []*pb.SignerInfos{&signerInfo}
	authinfo := pb.AuthInfo{SignerInfos: signerInfos,Uuid:"100000",ChainId:"zx00001"}
	unsignchain, _ := json.Marshal(pb.Request{Body: body, AuthInfo: &authinfo})
	sign, err := Sign(unsignchain, privkey, pubkey)
	if err != nil {
		log.Fatalf("sign err : %s", err)
	}

	signatures := []string{sign}

	b,err := json.Marshal(pb.Request{Body: body, AuthInfo: &authinfo, Signatures: signatures})
	fmt.Println(string(b))

	resp := &pb.Response{Code:"000000",Msg:"success"}
	b,err = json.Marshal(resp)
	fmt.Println(string(b))

	res := &pb.GetAllChainsReq{Page:1,Size:10,Sort:"chain_id",Order:pb.OrderType_DESC}
	b,err = json.Marshal(res)
	fmt.Println(string(b))


}
//签名
func Sign(unsign []byte, privKey string, pubkey string) (string, error) {
	privKeyBytes, err2 := hex.DecodeString(privKey)
	if err2 != nil {
		return "", err2
	}
	d := &big.Int{}
	d = d.SetBytes(privKeyBytes)
	priv := &sm2.PrivateKey{D: d}
	pubkeyBytes, err2 := hex.DecodeString(pubkey)
	if err2 != nil {
		return "", err2
	}
	publicKey := sm2.Decompress(pubkeyBytes)
	priv.PublicKey = *publicKey
	//fmt.Println("privkey: ", hex.EncodeToString(priv.D.Bytes()))
	//fmt.Println("原文：", string(unsign))
	sign, err := priv.Sign(rand.Reader, unsign, crypto.BLAKE2b_256)
	if err != nil {
		return "", err
	}
	pubkeyBytes = sm2.Compress(&priv.PublicKey)
	//fmt.Println("sign: ", hex.EncodeToString(sign))
	//fmt.Println("pubkey: ", hex.EncodeToString(pubkeyBytes))

	return hex.EncodeToString(sign), nil
}