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denomination.go
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denomination.go
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// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package params
import (
"math/big"
"strconv"
"strings"
"github.com/Onther-Tech/plasma-evm/log"
)
// These are the multipliers for ether denominations.
// Example: To get the wei value of an amount in 'gwei', use
//
// new(big.Int).Mul(value, big.NewInt(params.GWei))
//
const (
Wei = 1
GWei = 1e9
Ether = 1e18
)
func ToRayBigInt(v float64) *big.Int {
str := strconv.FormatFloat(v, 'f', -1, 64)
return parseFloatString(str, 27)
}
func ToEtherBigInt(v float64) *big.Int {
str := strconv.FormatFloat(v, 'f', -1, 64)
return parseFloatString(str, 18)
}
func ToGWeiBigInt(v float64) *big.Int {
str := strconv.FormatFloat(v, 'f', -1, 64)
return parseFloatString(str, 9)
}
func ToRayFloat64(v *big.Int) float64 {
isNeg := v.Cmp(big.NewInt(0)) < 0
abs := new(big.Int).Abs(v)
b := new(big.Int).Div(abs, big.NewInt(GWei))
b = new(big.Int).Div(b, big.NewInt(GWei))
if isNeg {
return -float64(b.Uint64()) / GWei
}
return float64(b.Uint64()) / GWei
}
func ToEtherFloat64(v *big.Int) float64 {
isNeg := v.Cmp(big.NewInt(0)) < 0
abs := new(big.Int).Abs(v)
b := new(big.Int).Div(abs, big.NewInt(GWei))
if isNeg {
return -float64(b.Uint64()) / GWei
}
return float64(b.Uint64()) / GWei
}
func ToGWeiFloat64(v *big.Int) float64 {
isNeg := v.Cmp(big.NewInt(0)) < 0
abs := new(big.Int).Abs(v)
if isNeg {
return -float64(abs.Uint64()) / GWei
}
return float64(abs.Uint64()) / GWei
}
func parseFloatString(str string, decimals int) *big.Int {
i := strings.Index(str, ".")
v := str
n := decimals
// split string with "."
if i >= 0 {
a := str[:i]
b := str[i+1:]
n = n - len(b)
if n < 0 {
log.Crit("out of decimals precision", "decimals", decimals, "length", len(b))
return nil
}
v = a + b
}
v = v + strings.Repeat("0", n)
bi, ok := big.NewInt(0).SetString(v, 10)
if !ok {
log.Crit("failed to parse string", "string", str)
return nil
}
return bi
}