forked from hashgraph/hedera-sdk-go
/
hbar.go
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/
hbar.go
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package hedera
/*-
*
* Hedera Go SDK
*
* Copyright (C) 2020 - 2022 Hedera Hashgraph, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
import (
"fmt"
"math"
"regexp"
"strconv"
"github.com/pkg/errors"
)
// Hbar is a typesafe wrapper around values of HBAR providing foolproof conversions to other denominations.
type Hbar struct {
tinybar int64
}
// MaxHbar is the maximum amount the Hbar type can wrap.
var MaxHbar = Hbar{math.MaxInt64}
// MinHbar is the minimum amount the Hbar type can wrap.
var MinHbar = Hbar{math.MinInt64}
// ZeroHbar wraps a 0 value of Hbar.
var ZeroHbar = Hbar{0}
// HbarFrom creates a representation of Hbar in tinybar on the unit provided
func HbarFrom(bars float64, unit HbarUnit) Hbar {
return HbarFromTinybar(int64(bars * float64(unit._NumberOfTinybar())))
}
// HbarFromTinybar creates a representation of Hbar in tinybars
func HbarFromTinybar(tinybar int64) Hbar {
return Hbar{tinybar}
}
// NewHbar constructs a new Hbar from a possibly fractional amount of hbar.
func NewHbar(hbar float64) Hbar {
return HbarFrom(hbar, HbarUnits.Hbar)
}
// AsTinybar returns the equivalent tinybar amount.
func (hbar Hbar) AsTinybar() int64 {
return hbar.tinybar
}
func (hbar Hbar) As(unit HbarUnit) float64 {
return float64(hbar.tinybar) / float64(unit._NumberOfTinybar())
}
func (hbar Hbar) String() string {
// Format the string as tinybar if the value is 1000 tinybar or less
if -10000 <= hbar.tinybar && hbar.tinybar <= 10000 {
return fmt.Sprintf("%v %s", hbar.tinybar, HbarUnits.Tinybar.Symbol())
}
return fmt.Sprintf("%v %s", float64(hbar.tinybar)/float64(HbarUnits.Hbar._NumberOfTinybar()), HbarUnits.Hbar.Symbol())
}
func HbarFromString(hbar string) (Hbar, error) {
var err error
match := regexp.MustCompile(`^((?:\+|\-)?\d+(?:\.\d+)?)(?: (tℏ|μℏ|mℏ|ℏ|kℏ|Mℏ|Gℏ))?$`)
matchArray := match.FindStringSubmatch(hbar)
if len(matchArray) == 0 {
return Hbar{}, errors.New("invalid number and/or symbol")
}
a, err := strconv.ParseFloat(matchArray[1], 64)
if err != nil {
return Hbar{}, err
}
return HbarFrom(a, _HbarUnitFromString(matchArray[2])), nil
}
func _HbarUnitFromString(symbol string) HbarUnit {
switch symbol {
case HbarUnits.Tinybar.Symbol():
return HbarUnits.Tinybar
case HbarUnits.Microbar.Symbol():
return HbarUnits.Microbar
case HbarUnits.Millibar.Symbol():
return HbarUnits.Millibar
case HbarUnits.Kilobar.Symbol():
return HbarUnits.Kilobar
case HbarUnits.Megabar.Symbol():
return HbarUnits.Megabar
case HbarUnits.Gigabar.Symbol():
return HbarUnits.Gigabar
default:
return HbarUnits.Hbar
}
}
func (hbar Hbar) ToString(unit HbarUnit) string {
return fmt.Sprintf("%v %v", float64(hbar.tinybar)/float64(unit._NumberOfTinybar()), unit.Symbol())
}
func (hbar Hbar) Negated() Hbar {
return Hbar{
tinybar: -hbar.tinybar,
}
}