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utils.go
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utils.go
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package cli
import (
"context"
"encoding/json"
"errors"
"fmt"
"math/big"
"net/http"
"os"
"regexp"
"strings"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/console"
"github.com/ethereum/go-ethereum/rpc"
"github.com/sirupsen/logrus"
)
var (
big10 = big.NewInt(10)
big1NEWInWEI = new(big.Int).Exp(big10, big.NewInt(18), nil)
errClientNil = errors.New("Failed to connect to the NewChain client")
errCliNil = errors.New("Cli error")
errCliTranNil = errors.New("Cli tran error")
errBigSetString = errors.New("conver string to big error")
errLessThan0Wei = errors.New("The transaction amount is less than 0 WEI")
errIllegalAmount = errors.New("Illegal Amount")
errIllegalUnit = errors.New("Illegal Unit")
errRequiredFromAddress = errors.New(`required flag(s) "from" not set`)
errArgs0 = errors.New("missing value for required argument")
errArgsType = errors.New("arguments type error")
errFromAddressNil = errors.New("from address nil")
errFromAddressIllegal = errors.New("from address illegal")
errToAddressNil = errors.New("to address nil")
errToAddressIllegal = errors.New("to address illegal")
errWalletPathEmppty = errors.New("empty wallet, create account first")
errWalletNoAccount = errors.New("keystore find account nil")
errAmount0 = errors.New("not set send amount or amount is 0")
errRequiredToAddress = errors.New("not set to address")
errNonceError = errors.New("get nonce error")
)
var IsDecimalString = regexp.MustCompile(`^[1-9]\d*$|^0$|^0\.\d*$|^[1-9](\d)*\.(\d)*$`).MatchString
func showSuccess(msg string, args ...interface{}) {
fmt.Printf(msg+"\n", args...)
}
func showError(fields logrus.Fields, msg string, args ...interface{}) {
logrus.WithFields(fields).Errorf(msg, args...)
}
// getPassPhrase retrieves the password associated with an account,
// requested interactively from the user.
func getPassPhrase(prompt string, confirmation bool) (string, error) {
// prompt the user for the password
if prompt != "" {
fmt.Println(prompt)
}
password, err := console.Stdin.PromptPassword("Enter passphrase (empty for no passphrase): ")
if err != nil {
return "", err
}
if confirmation {
confirm, err := console.Stdin.PromptPassword("Enter same passphrase again: ")
if err != nil {
return "", err
}
if password != confirm {
return "", fmt.Errorf("Passphrases do not match")
}
}
return password, nil
}
func stringInSlice(str string, list []string) bool {
for _, v := range list {
if v == str {
return true
}
}
return false
}
// DenominationString is for denomination string
// const DenominationString = "Available unit: Wei, Ada, Babbage, Shannon, Szabo, Finney, Ether, Einstein, Douglas, Gwei"
const DenominationString = "Available unit: NEW, WEI"
// DenominationList is array for denomination string
// var DenominationList = []string{"Wei", "Ada", "Babbage", "Shannon", "Szabo", "Finney", "Ether", "Einstein", "Douglas", "Gwei"}
var DenominationList = []string{"NEW", "WEI"}
func getAmountWei(amountStr, unit string) (*big.Int, error) {
switch unit {
case "NEW":
index := strings.IndexByte(amountStr, '.')
if index <= 0 {
amountWei, ok := new(big.Int).SetString(amountStr, 10)
if !ok {
return nil, errBigSetString
}
return new(big.Int).Mul(amountWei, big1NEWInWEI), nil
}
amountStrInt := amountStr[:index]
amountStrDec := amountStr[index+1:]
amountStrDecLen := len(amountStrDec)
if amountStrDecLen > 18 {
return nil, errIllegalAmount
}
amountStrInt = amountStrInt + strings.Repeat("0", 18)
amountStrDec = amountStrDec + strings.Repeat("0", 18-amountStrDecLen)
amountStrIntBig, ok := new(big.Int).SetString(amountStrInt, 10)
if !ok {
return nil, errBigSetString
}
amountStrDecBig, ok := new(big.Int).SetString(amountStrDec, 10)
if !ok {
return nil, errBigSetString
}
return new(big.Int).Add(amountStrIntBig, amountStrDecBig), nil
case "WEI":
amountWei, ok := new(big.Int).SetString(amountStr, 10)
if !ok {
return nil, errBigSetString
}
return amountWei, nil
}
return nil, errIllegalUnit
}
func getWeiAmountTextUnitByUnit(amount *big.Int, unit string) string {
if amount == nil {
return "0 WEI"
}
amountStr := amount.String()
amountStrLen := len(amountStr)
if unit == "" {
if amountStrLen <= 18 {
// show in WEI
unit = "WEI"
} else {
unit = "NEW"
}
}
return fmt.Sprintf("%s %s", getWeiAmountTextByUnit(amount, unit), unit)
}
func getWeiAmountTextByUnit(amount *big.Int, unit string) string {
if amount == nil {
return "0"
}
amountStr := amount.String()
amountStrLen := len(amountStr)
switch unit {
case "NEW":
var amountStrDec, amountStrInt string
if amountStrLen <= 18 {
amountStrDec = strings.Repeat("0", 18-amountStrLen) + amountStr
amountStrInt = "0"
} else {
amountStrDec = amountStr[amountStrLen-18:]
amountStrInt = amountStr[:amountStrLen-18]
}
amountStrDec = strings.TrimRight(amountStrDec, "0")
if len(amountStrDec) <= 0 {
return amountStrInt
}
return amountStrInt + "." + amountStrDec
case "WEI":
return amountStr
}
return errIllegalUnit.Error()
}
func createNewAccount(walletPath string, numOfNew int) error {
wallet := keystore.NewKeyStore(walletPath,
keystore.LightScryptN, keystore.LightScryptP)
walletPassword, err := getPassPhrase("Your new account is locked with a password. Please give a password. Do not forget this password.", true)
if err != nil {
fmt.Println("Error: ", err)
return err
}
for i := 0; i < numOfNew; i++ {
account, err := wallet.NewAccount(walletPassword)
if err != nil {
fmt.Println("Account error:", err)
return err
}
fmt.Println(account.Address.Hex())
}
return nil
}
func showTransactionReceipt(url, txStr string) {
sendJSONPostAndShow(url, "eth_getTransactionReceipt", txStr)
}
func sendJSONPostAndShow(url, method string, args ...interface{}) {
ctx := context.Background()
client, err := rpc.DialContext(ctx, url)
if err != nil {
fmt.Println("DialContext: ", err)
return
}
var raw json.RawMessage
if err := client.CallContext(ctx, &raw, method, args...); err != nil {
fmt.Println("CallContext Error: ", err)
return
}
rawStr, err := json.MarshalIndent(raw, "", "\t")
if err != nil {
fmt.Println("JSON marshaling failed: ", err)
return
}
fmt.Printf("%s\n", rawStr)
return
}
func getFaucet(rpcURL, address string) {
url := fmt.Sprintf("%s/faucet?address=%s", rpcURL, address)
resp, err := http.Get(url)
if err != nil {
fmt.Fprintf(os.Stderr, "Get error: %v\n", err)
return
}
if resp.StatusCode == 200 {
fmt.Printf("Get faucet for %s\n", address)
}
}