以太坊 根据keystore文件与密码生成私钥

导入ethereum相关包

package main

import (
	"encoding/hex"
	"fmt"
	"github.com/ethereum/go-ethereum/accounts/keystore"
	"github.com/ethereum/go-ethereum/crypto"
	"io/ioutil"
	"log"
)

func main() {
	privKey, address, err := KeystoreToPrivateKey("UTC--2020-02-04T09-28-07.842407788Z--0xadec0da5d590e517396387a9504f60e2bbee4dd6", "1")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("privKey:%s\naddress:%s\n", privKey, address)
}

func KeystoreToPrivateKey(privateKeyFile, password string) (string, string, error) {
	keyjson, err := ioutil.ReadFile(privateKeyFile)
	if err != nil {
		fmt.Println("read keyjson file failed：", err)
	}
	unlockedKey, err := keystore.DecryptKey(keyjson, password)
	if err != nil {

		return "", "", err

	}
	privKey := hex.EncodeToString(unlockedKey.PrivateKey.D.Bytes())
	addr := crypto.PubkeyToAddress(unlockedKey.PrivateKey.PublicKey)
	return privKey, addr.String(), nil
}