昨天優化了專案結構，現在要來開始將前天寫的code給變成函式庫

首先先設定config檔案，使用的是toml格式，目前先放會用到的設定，之後可能還會增加。

title = "Elrond config"

[server]
url = "https://testnet-api.elrond.com"

[savePath]
path = "/data/privateKey/"

今天先來把使用SDK的部分給function化這樣之後可以整理到internal資料夾中，讓各個程式使用，

package main

import (
	"fmt"
	"github.com/ElrondNetwork/elrond-sdk/erdgo"
	"github.com/sethvargo/go-password/password"
)

func generateNewMnemonic() (string, error) {
	return erdgo.GenerateNewMnemonic()
}

func getPrivateKeyFromMnemonic(mnemonic string, account, index uint8) []byte {
	return erdgo.GetPrivateKeyFromMnemonic(mnemonic, account, index)
}

func getAddressFromPrivateKey(privateKey []byte) (string, error) {
	return erdgo.GetAddressFromPrivateKey(privateKey)
}

func savePrivateKeyToPemFile(privateKey []byte, filePath string) error {
	return erdgo.SavePrivateKeyToPemFile(privateKey, filePath+".pem")
}

func savePrivateKeyToJsonFile(privateKey []byte, jsonPass, filePath string) error {
	return erdgo.SavePrivateKeyToJsonFile(privateKey, jsonPass, filePath)
}

func loadPrivateKeyFromPemFile(filePath string) ([]byte, error) {
	return erdgo.LoadPrivateKeyFromPemFile(filePath)
}

func loadPrivateKeyFromJsonFile(filePath, filePass string) ([]byte, error) {
	return erdgo.LoadPrivateKeyFromJsonFile(filePath, filePass)
}

func main() {
	// 1. get New Mnemonic
	mnemonic, _ := generateNewMnemonic()
	fmt.Printf("Generated mnemonic: %s \n", mnemonic)
	//// 2. get Private Key from Mnemonic
	privateKey := getPrivateKeyFromMnemonic(mnemonic, 0, 0)
	fmt.Printf("Generated privateKey: %s \n", privateKey)
	//// 3. get Address from private key
	address, _ := getAddressFromPrivateKey(privateKey)
	fmt.Printf("Generated wallet: %s \n", address)
	//// 4. export pem file from private key
	err := savePrivateKeyToPemFile(privateKey, address+".pem")
	if err != nil {
		return
	}
	//// generate password from json
	jsonPass, _ := password.Generate(64, 10, 10, false, false)
	fmt.Printf("Generated json password: %s \n", jsonPass)
	//// 5. export json file from private key
	err = savePrivateKeyToJsonFile(privateKey, jsonPass, address+".json")
	if err != nil {
		return
	}
	//// 6. import from pem
	pemPrivateKey, _ := loadPrivateKeyFromPemFile(address + ".pem")
	fmt.Printf("PrivateKey from pem: %s \n", privateKey)
	pemAddress, _ := getAddressFromPrivateKey(pemPrivateKey)
	fmt.Printf("Address from pem: %s \n", pemAddress)
	//// 7. import from json
	jsonPrivateKey, _ := loadPrivateKeyFromJsonFile(address+".json", jsonPass)
	fmt.Printf("PrivateKey from json: %s \n", jsonPrivateKey)
	jsonAddress, _ := getAddressFromPrivateKey(jsonPrivateKey)
	fmt.Printf("Address from json: %s \n", jsonAddress)
}

整理好後執行確認結果與之前的一樣

將這些sdk使用方式function化後就可以開始寫test了，越來越有一個專案的結構了。