15951470896

Committed 29 Jun 2025 04:23AM UTC coverage: 67.594% (-0.01%) from 67.606%

Build # 15951470896

Build Type

Pull #9751

github

Committed by

web-flow

Commit Message

Merge 599d9b051 into 6290edf14

Pull Request Pull Request #9751: multi: update Go to 1.23.10 and update some packages

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100.0

/zpay32/hophint.go

package zpay32

import (
        "github.com/btcsuite/btcd/btcec/v2"
        "github.com/lightningnetwork/lnd/lnwire"
)

const (
        // DefaultAssumedFinalCLTVDelta is the default value to be used as the
        // final CLTV delta for a route if one is unspecified in the payment
        // request.
        // We adhere to the recommendation in BOLT 02 for terminal payments.
        // See also:
        // https://github.com/lightning/bolts/blob/master/02-peer-protocol.md
        DefaultAssumedFinalCLTVDelta = 18

        // feeRateParts is the total number of parts used to express fee rates.
        feeRateParts = 1e6
)

// HopHint is a routing hint that contains the minimum information of a channel
// required for an intermediate hop in a route to forward the payment to the
// next. This should be ideally used for private channels, since they are not
// publicly advertised to the network for routing.
type HopHint struct {
        // NodeID is the public key of the node at the start of the channel.
        NodeID *btcec.PublicKey

        // ChannelID is the unique identifier of the channel.
        ChannelID uint64

        // FeeBaseMSat is the base fee of the channel in millisatoshis.
        FeeBaseMSat uint32

        // FeeProportionalMillionths is the fee rate, in millionths of a
        // satoshi, for every satoshi sent through the channel.
        FeeProportionalMillionths uint32

        // CLTVExpiryDelta is the time-lock delta of the channel.
        CLTVExpiryDelta uint16
}

// Copy returns a deep copy of the hop hint.
func (h HopHint) Copy() HopHint {
        nodeID := *h.NodeID
        return HopHint{
                NodeID:                    &nodeID,
                ChannelID:                 h.ChannelID,
                FeeBaseMSat:               h.FeeBaseMSat,
                FeeProportionalMillionths: h.FeeProportionalMillionths,
                CLTVExpiryDelta:           h.CLTVExpiryDelta,
        }
}

// HopFee calculates the fee for a given amount that is forwarded over a hop.
// The amount has to be denoted in milli satoshi. The returned fee is also
// denoted in milli satoshi.
func (h HopHint) HopFee(amt lnwire.MilliSatoshi) lnwire.MilliSatoshi {
        baseFee := lnwire.MilliSatoshi(h.FeeBaseMSat)
        feeRate := lnwire.MilliSatoshi(h.FeeProportionalMillionths)

        return baseFee + (amt*feeRate)/feeRateParts
}

1	package zpay32
2
3	import (
4	"github.com/btcsuite/btcd/btcec/v2"
5	"github.com/lightningnetwork/lnd/lnwire"
6	)
7
8	const (
9	// DefaultAssumedFinalCLTVDelta is the default value to be used as the
10	// final CLTV delta for a route if one is unspecified in the payment
11	// request.
12	// We adhere to the recommendation in BOLT 02 for terminal payments.
13	// See also:
14	// https://github.com/lightning/bolts/blob/master/02-peer-protocol.md
15	DefaultAssumedFinalCLTVDelta = 18
16
17	// feeRateParts is the total number of parts used to express fee rates.
18	feeRateParts = 1e6
19	)
20
21	// HopHint is a routing hint that contains the minimum information of a channel
22	// required for an intermediate hop in a route to forward the payment to the
23	// next. This should be ideally used for private channels, since they are not
24	// publicly advertised to the network for routing.
25	type HopHint struct {
26	// NodeID is the public key of the node at the start of the channel.
27	NodeID *btcec.PublicKey
28
29	// ChannelID is the unique identifier of the channel.
30	ChannelID uint64
31
32	// FeeBaseMSat is the base fee of the channel in millisatoshis.
33	FeeBaseMSat uint32
34
35	// FeeProportionalMillionths is the fee rate, in millionths of a
36	// satoshi, for every satoshi sent through the channel.
37	FeeProportionalMillionths uint32
38
39	// CLTVExpiryDelta is the time-lock delta of the channel.
40	CLTVExpiryDelta uint16
41	}
42
43	// Copy returns a deep copy of the hop hint.
44	func (h HopHint) Copy() HopHint {	1✔
45	nodeID := *h.NodeID	1✔
46	return HopHint{	1✔
47	NodeID: &nodeID,	1✔
48	ChannelID: h.ChannelID,	1✔
49	FeeBaseMSat: h.FeeBaseMSat,	1✔
50	FeeProportionalMillionths: h.FeeProportionalMillionths,	1✔
51	CLTVExpiryDelta: h.CLTVExpiryDelta,	1✔
52	}	1✔
53	}	1✔
54
55	// HopFee calculates the fee for a given amount that is forwarded over a hop.
56	// The amount has to be denoted in milli satoshi. The returned fee is also
57	// denoted in milli satoshi.
58	func (h HopHint) HopFee(amt lnwire.MilliSatoshi) lnwire.MilliSatoshi {	11✔
59	baseFee := lnwire.MilliSatoshi(h.FeeBaseMSat)	11✔
60	feeRate := lnwire.MilliSatoshi(h.FeeProportionalMillionths)	11✔
61		11✔
62	return baseFee + (amt*feeRate)/feeRateParts	11✔
63	}	11✔

lightningnetwork / lnd / 15951470896

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