restore private key from ethereum, geth test net keystore

restore-private-key-from-keystore.go

package main

import (
	"encoding/hex"
	"fmt"
	"io/ioutil"

	"github.com/ethereum/go-ethereum/accounts/keystore"
	"github.com/ethereum/go-ethereum/crypto"
)

func main() {
	file := `YOUR_DATA_PATH/keystore/UTC-xxx`
	password := `YOUR_PASSWORD`
	keyjson, err := ioutil.ReadFile(file)

	key, err := keystore.DecryptKey(keyjson, password)
	if err != nil {
		fmt.Printf("json key failed to decrypt: %v\n", err)
	}

	fmt.Printf("Original PrivateKey %#v\n", key.PrivateKey)
	privateKeyBytes := crypto.FromECDSA(key.PrivateKey)

	fmt.Printf("privateKeyHexStr %x\n", privateKeyBytes)

	privateKey, err := crypto.ToECDSA(privateKeyBytes)
	fmt.Printf("Private Key from str %#v err %v \n", privateKey, err)

	hexPrivateKey := hex.EncodeToString(privateKeyBytes)
	fmt.Println(hexPrivateKey)

	neoPrivateKeyBytes, _ := hex.DecodeString(hexPrivateKey)
	if string(neoPrivateKeyBytes) == string(privateKeyBytes) {
		fmt.Println("neo private key bytes == private key bytes")
	} else {
		fmt.Println("neo private key bytes != private key bytes")
	}
}