43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
// Copyright (c) 2015-2016 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package cfgutil
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import (
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"strconv"
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"strings"
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"github.com/btcsuite/btcutil"
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)
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// AmountFlag embeds a btcutil.Amount and implements the flags.Marshaler and
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// Unmarshaler interfaces so it can be used as a config struct field.
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type AmountFlag struct {
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btcutil.Amount
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}
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// NewAmountFlag creates an AmountFlag with a default btcutil.Amount.
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func NewAmountFlag(defaultValue btcutil.Amount) *AmountFlag {
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return &AmountFlag{defaultValue}
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}
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// MarshalFlag satisfies the flags.Marshaler interface.
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func (a *AmountFlag) MarshalFlag() (string, error) {
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return a.Amount.String(), nil
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}
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// UnmarshalFlag satisfies the flags.Unmarshaler interface.
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func (a *AmountFlag) UnmarshalFlag(value string) error {
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value = strings.TrimSuffix(value, " BTC")
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valueF64, err := strconv.ParseFloat(value, 64)
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if err != nil {
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return err
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}
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amount, err := btcutil.NewAmount(valueF64)
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if err != nil {
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return err
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}
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a.Amount = amount
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return nil
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}
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