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utils.go
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/
utils.go
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package types
import (
"errors"
"fmt"
"math"
"math/big"
"strings"
"github.com/33cn/chain33/common/address"
)
//MultiplySpecifyTimes ...
func MultiplySpecifyTimes(start float64, time int64) float64 {
for i := 0; i < int(time); i++ {
start *= 10
}
return start
}
//Toeth ...
func Toeth(amount string, decimal int64) float64 {
bf := big.NewFloat(0)
var ok bool
bf, ok = bf.SetString(TrimZeroAndDot(amount))
if !ok {
return 0
}
bf = bf.Quo(bf, big.NewFloat(MultiplySpecifyTimes(1, decimal)))
f, _ := bf.Float64()
return f
}
//ToWei 将eth单位的金额转为wei单位
func ToWei(amount float64, decimal int64) *big.Int {
var ok bool
bn := big.NewInt(1)
if decimal > 4 {
bn, ok = bn.SetString(TrimZeroAndDot(fmt.Sprintf("%.0f", MultiplySpecifyTimes(math.Trunc(amount*1e4), decimal-4))), 10)
} else {
bn, ok = bn.SetString(TrimZeroAndDot(fmt.Sprintf("%.0f", MultiplySpecifyTimes(amount, decimal))), 10)
}
if ok {
return bn
}
return nil
}
//TrimZeroAndDot ...
func TrimZeroAndDot(s string) string {
if strings.Contains(s, ".") {
var trimDotStr string
trimZeroStr := strings.TrimRight(s, "0")
trimDotStr = strings.TrimRight(trimZeroStr, ".")
return trimDotStr
}
return s
}
//CheckPower ...
func CheckPower(power int64) bool {
if power <= 0 || power > 100 {
return false
}
return true
}
//DivideDot ...
func DivideDot(in string) (left, right string, err error) {
if strings.Contains(in, ".") {
ss := strings.Split(in, ".")
return ss[0], ss[1], nil
}
return "", "", errors.New("Divide error")
}
//IsExecAddrMatch ...
func IsExecAddrMatch(name string, to string) bool {
toaddr := address.ExecAddress(name)
return toaddr == to
}