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https://github.com/lightningnetwork/lnd.git
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580c10477f
Add the new ChannelUpdate2 message and ensure that it implements the ChannelUpdate interface.
91 lines
2.5 KiB
Go
91 lines
2.5 KiB
Go
package lnwire
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import (
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"fmt"
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"io"
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"github.com/btcsuite/btcd/btcutil"
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"github.com/lightningnetwork/lnd/tlv"
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)
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const (
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// mSatScale is a value that's used to scale satoshis to milli-satoshis, and
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// the other way around.
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mSatScale uint64 = 1000
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// MaxMilliSatoshi is the maximum number of msats that can be expressed
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// in this data type.
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MaxMilliSatoshi = ^MilliSatoshi(0)
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)
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// MilliSatoshi are the native unit of the Lightning Network. A milli-satoshi
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// is simply 1/1000th of a satoshi. There are 1000 milli-satoshis in a single
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// satoshi. Within the network, all HTLC payments are denominated in
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// milli-satoshis. As milli-satoshis aren't deliverable on the native
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// blockchain, before settling to broadcasting, the values are rounded down to
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// the nearest satoshi.
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type MilliSatoshi uint64
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// NewMSatFromSatoshis creates a new MilliSatoshi instance from a target amount
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// of satoshis.
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func NewMSatFromSatoshis(sat btcutil.Amount) MilliSatoshi {
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return MilliSatoshi(uint64(sat) * mSatScale)
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}
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// ToBTC converts the target MilliSatoshi amount to its corresponding value
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// when expressed in BTC.
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func (m MilliSatoshi) ToBTC() float64 {
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sat := m.ToSatoshis()
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return sat.ToBTC()
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}
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// ToSatoshis converts the target MilliSatoshi amount to satoshis. Simply, this
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// sheds a factor of 1000 from the mSAT amount in order to convert it to SAT.
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func (m MilliSatoshi) ToSatoshis() btcutil.Amount {
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return btcutil.Amount(uint64(m) / mSatScale)
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}
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// String returns the string representation of the mSAT amount.
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func (m MilliSatoshi) String() string {
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return fmt.Sprintf("%v mSAT", uint64(m))
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}
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// TODO(roasbeef): extend with arithmetic operations?
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// Record returns a TLV record that can be used to encode/decode a MilliSatoshi
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// to/from a TLV stream.
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func (m *MilliSatoshi) Record() tlv.Record {
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return tlv.MakeDynamicRecord(
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0, m, tlv.SizeBigSize(m), encodeMilliSatoshis,
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decodeMilliSatoshis,
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)
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}
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func encodeMilliSatoshis(w io.Writer, val interface{}, buf *[8]byte) error {
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if v, ok := val.(*MilliSatoshi); ok {
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bigSize := uint64(*v)
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return tlv.EBigSize(w, &bigSize, buf)
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}
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return tlv.NewTypeForEncodingErr(val, "lnwire.MilliSatoshi")
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}
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func decodeMilliSatoshis(r io.Reader, val interface{}, buf *[8]byte,
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l uint64) error {
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if v, ok := val.(*MilliSatoshi); ok {
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var bigSize uint64
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err := tlv.DBigSize(r, &bigSize, buf, l)
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if err != nil {
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return err
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}
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*v = MilliSatoshi(bigSize)
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return nil
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}
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return tlv.NewTypeForDecodingErr(val, "lnwire.MilliSatoshi", l, l)
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}
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