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package util
import (
"math/big"
"regexp"
"strconv"
"time"
"github.com/tao-foundation/tethashv1-geth/common"
"github.com/tao-foundation/tethashv1-geth/common/math"
)
var Ether = math.BigPow(10, 18)
var Shannon = math.BigPow(10, 9)
var pow256 = math.BigPow(2, 256)
var addressPattern = regexp.MustCompile("^0x[0-9a-fA-F]{40}$")
var zeroHash = regexp.MustCompile("^0?x?0+$")
func IsValidHexAddress(s string) bool {
if IsZeroHash(s) || !addressPattern.MatchString(s) {
return false
}
return true
}
func IsZeroHash(s string) bool {
return zeroHash.MatchString(s)
}
func MakeTimestamp() int64 {
return time.Now().UnixNano() / int64(time.Millisecond)
}
func GetTargetHex(diff int64) string {
difficulty := big.NewInt(diff)
diff1 := new(big.Int).Div(pow256, difficulty)
return string(common.ToHex(diff1.Bytes()))
}
func TargetHexToDiff(targetHex string) *big.Int {
targetBytes := common.FromHex(targetHex)
return new(big.Int).Div(pow256, new(big.Int).SetBytes(targetBytes))
}
func ToHex(n int64) string {
return "0x0" + strconv.FormatInt(n, 16)
}
func FormatReward(reward *big.Int) string {
return reward.String()
}
func FormatRatReward(reward *big.Rat) string {
wei := new(big.Rat).SetInt(Ether)
reward = reward.Quo(reward, wei)
return reward.FloatString(8)
}
func StringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
func MustParseDuration(s string) time.Duration {
value, err := time.ParseDuration(s)
if err != nil {
panic("util: Can't parse duration `" + s + "`: " + err.Error())
}
return value
}
func String2Big(num string) *big.Int {
n := new(big.Int)
n.SetString(num, 0)
return n
}