15858991938

Committed 24 Jun 2025 06:51PM UTC coverage: 55.808% (-2.4%) from 58.173%

Build # 15858991938

Build Type

Pull #9148

github

Committed by

web-flow

Commit Message

Merge 0e921d6a5 into 29ff13d83

Pull Request Pull Request #9148: DynComms [2/n]: lnwire: add authenticated wire messages for Dyn*

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79.49

/lnwire/dyn_commit.go

package lnwire

import (
        "bytes"
        "io"

        "github.com/btcsuite/btcd/btcutil"
        "github.com/lightningnetwork/lnd/tlv"
)

// DynCommit is a composite message that is used to irrefutably execute a
// dynamic commitment update.
type DynCommit struct {
        // DynPropose is an embedded version of the original DynPropose message
        // that initiated this negotiation.
        DynPropose

        // DynAck is an embedded version of the original DynAck message that
        // countersigned this negotiation.
        DynAck

        // ExtraData is the set of data that was appended to this message to
        // fill out the full maximum transport message size. These fields can
        // be used to specify optional data such as custom TLV fields.
        ExtraData ExtraOpaqueData
}

// A compile time check to ensure DynAck implements the lnwire.Message
// interface.
var _ Message = (*DynCommit)(nil)

// Encode serializes the target DynAck into the passed io.Writer. Serialization
// will observe the rules defined by the passed protocol version.
//
// This is a part of the lnwire.Message interface.
func (dc *DynCommit) Encode(w *bytes.Buffer, _ uint32) error {
        if err := WriteChannelID(w, dc.DynPropose.ChanID); err != nil {
                return err
        }

        if err := WriteSig(w, dc.Sig); err != nil {
                return err
        }

        var extra ExtraOpaqueData
        err := extra.PackRecords(dynProposeRecords(&dc.DynPropose)...)
        if err != nil {
                return err
        }
        dc.ExtraData = extra

        return WriteBytes(w, dc.ExtraData)
}

// Decode deserializes the serialized DynCommit stored in the passed io.Reader
// into the target DynAck using the deserialization rules defined by the passed
// protocol version.
//
// This is a part of the lnwire.Message interface.
func (dc *DynCommit) Decode(r io.Reader, _ uint32) error {
        // Parse out main message.
        if err := ReadElements(r, &dc.DynPropose.ChanID, &dc.Sig); err != nil {
                return err
        }
        dc.DynAck.ChanID = dc.DynPropose.ChanID

        // Parse out TLV records.
        var tlvRecords ExtraOpaqueData
        if err := ReadElement(r, &tlvRecords); err != nil {
                return err
        }

        // Prepare receiving buffers to be filled by TLV extraction.
        var dustLimit tlv.RecordT[tlv.TlvType0, uint64]
        var maxValue tlv.RecordT[tlv.TlvType2, uint64]
        var htlcMin tlv.RecordT[tlv.TlvType4, uint64]
        var reserve tlv.RecordT[tlv.TlvType6, uint64]
        csvDelay := dc.CsvDelay.Zero()
        maxHtlcs := dc.MaxAcceptedHTLCs.Zero()
        chanType := dc.ChannelType.Zero()

        typeMap, err := tlvRecords.ExtractRecords(
                &dustLimit, &maxValue, &htlcMin, &reserve, &csvDelay, &maxHtlcs,
                &chanType,
        )
        if err != nil {
                return err
        }

        // Check the results of the TLV Stream decoding and appropriately set
        // message fields.
        if val, ok := typeMap[dc.DustLimit.TlvType()]; ok && val == nil {
                var rec tlv.RecordT[tlv.TlvType0, btcutil.Amount]
                rec.Val = btcutil.Amount(dustLimit.Val)
                dc.DustLimit = tlv.SomeRecordT(rec)
        }
        if val, ok := typeMap[dc.MaxValueInFlight.TlvType()]; ok && val == nil {
                var rec tlv.RecordT[tlv.TlvType2, MilliSatoshi]
                rec.Val = MilliSatoshi(maxValue.Val)
                dc.MaxValueInFlight = tlv.SomeRecordT(rec)
        }
        if val, ok := typeMap[dc.HtlcMinimum.TlvType()]; ok && val == nil {
                var rec tlv.RecordT[tlv.TlvType4, MilliSatoshi]
                rec.Val = MilliSatoshi(htlcMin.Val)
                dc.HtlcMinimum = tlv.SomeRecordT(rec)
        }
        if val, ok := typeMap[dc.ChannelReserve.TlvType()]; ok && val == nil {
                var rec tlv.RecordT[tlv.TlvType6, btcutil.Amount]
                rec.Val = btcutil.Amount(reserve.Val)
                dc.ChannelReserve = tlv.SomeRecordT(rec)
        }
        if val, ok := typeMap[dc.CsvDelay.TlvType()]; ok && val == nil {
                dc.CsvDelay = tlv.SomeRecordT(csvDelay)
        }
        if val, ok := typeMap[dc.MaxAcceptedHTLCs.TlvType()]; ok && val == nil {
                dc.MaxAcceptedHTLCs = tlv.SomeRecordT(maxHtlcs)
        }
        if val, ok := typeMap[dc.ChannelType.TlvType()]; ok && val == nil {
                dc.ChannelType = tlv.SomeRecordT(chanType)
        }

        if len(tlvRecords) != 0 {
                dc.ExtraData = tlvRecords
        }

        return nil
}

// MsgType returns the MessageType code which uniquely identifies this message
// as a DynCommit on the wire.
//
// This is part of the lnwire.Message interface.
func (dc *DynCommit) MsgType() MessageType {
        return MsgDynCommit
}

1	package lnwire
2
3	import (
4	"bytes"
5	"io"
6
7	"github.com/btcsuite/btcd/btcutil"
8	"github.com/lightningnetwork/lnd/tlv"
9	)
10
11	// DynCommit is a composite message that is used to irrefutably execute a
12	// dynamic commitment update.
13	type DynCommit struct {
14	// DynPropose is an embedded version of the original DynPropose message
15	// that initiated this negotiation.
16	DynPropose
17
18	// DynAck is an embedded version of the original DynAck message that
19	// countersigned this negotiation.
20	DynAck
21
22	// ExtraData is the set of data that was appended to this message to
23	// fill out the full maximum transport message size. These fields can
24	// be used to specify optional data such as custom TLV fields.
25	ExtraData ExtraOpaqueData
26	}
27
28	// A compile time check to ensure DynAck implements the lnwire.Message
29	// interface.
30	var _ Message = (*DynCommit)(nil)
31
32	// Encode serializes the target DynAck into the passed io.Writer. Serialization
33	// will observe the rules defined by the passed protocol version.
34	//
35	// This is a part of the lnwire.Message interface.
36	func (dc DynCommit) Encode(w bytes.Buffer, _ uint32) error {	100✔
37	if err := WriteChannelID(w, dc.DynPropose.ChanID); err != nil {	100✔
NEW 38	return err	×
NEW 39	}	×
40
41	if err := WriteSig(w, dc.Sig); err != nil {	100✔
NEW 42	return err	×
NEW 43	}	×
44
45	var extra ExtraOpaqueData	100✔
46	err := extra.PackRecords(dynProposeRecords(&dc.DynPropose)...)	100✔
47	if err != nil {	100✔
NEW 48	return err	×
NEW 49	}	×
50	dc.ExtraData = extra	100✔
51		100✔
52	return WriteBytes(w, dc.ExtraData)	100✔
53	}
54
55	// Decode deserializes the serialized DynCommit stored in the passed io.Reader
56	// into the target DynAck using the deserialization rules defined by the passed
57	// protocol version.
58	//
59	// This is a part of the lnwire.Message interface.
60	func (dc *DynCommit) Decode(r io.Reader, _ uint32) error {	100✔
61	// Parse out main message.	100✔
62	if err := ReadElements(r, &dc.DynPropose.ChanID, &dc.Sig); err != nil {	100✔
NEW 63	return err	×
NEW 64	}	×
65	dc.DynAck.ChanID = dc.DynPropose.ChanID	100✔
66		100✔
67	// Parse out TLV records.	100✔
68	var tlvRecords ExtraOpaqueData	100✔
69	if err := ReadElement(r, &tlvRecords); err != nil {	100✔
NEW 70	return err	×
NEW 71	}	×
72
73	// Prepare receiving buffers to be filled by TLV extraction.
74	var dustLimit tlv.RecordT[tlv.TlvType0, uint64]	100✔
75	var maxValue tlv.RecordT[tlv.TlvType2, uint64]	100✔
76	var htlcMin tlv.RecordT[tlv.TlvType4, uint64]	100✔
77	var reserve tlv.RecordT[tlv.TlvType6, uint64]	100✔
78	csvDelay := dc.CsvDelay.Zero()	100✔
79	maxHtlcs := dc.MaxAcceptedHTLCs.Zero()	100✔
80	chanType := dc.ChannelType.Zero()	100✔
81		100✔
82	typeMap, err := tlvRecords.ExtractRecords(	100✔
83	&dustLimit, &maxValue, &htlcMin, &reserve, &csvDelay, &maxHtlcs,	100✔
84	&chanType,	100✔
85	)	100✔
86	if err != nil {	100✔
NEW 87	return err	×
NEW 88	}	×
89
90	// Check the results of the TLV Stream decoding and appropriately set
91	// message fields.
92	if val, ok := typeMap[dc.DustLimit.TlvType()]; ok && val == nil {	158✔
93	var rec tlv.RecordT[tlv.TlvType0, btcutil.Amount]	58✔
94	rec.Val = btcutil.Amount(dustLimit.Val)	58✔
95	dc.DustLimit = tlv.SomeRecordT(rec)	58✔
96	}	58✔
97	if val, ok := typeMap[dc.MaxValueInFlight.TlvType()]; ok && val == nil {	155✔
98	var rec tlv.RecordT[tlv.TlvType2, MilliSatoshi]	55✔
99	rec.Val = MilliSatoshi(maxValue.Val)	55✔
100	dc.MaxValueInFlight = tlv.SomeRecordT(rec)	55✔
101	}	55✔
102	if val, ok := typeMap[dc.HtlcMinimum.TlvType()]; ok && val == nil {	100✔
NEW 103	var rec tlv.RecordT[tlv.TlvType4, MilliSatoshi]	×
NEW 104	rec.Val = MilliSatoshi(htlcMin.Val)	×
NEW 105	dc.HtlcMinimum = tlv.SomeRecordT(rec)	×
NEW 106	}	×
107	if val, ok := typeMap[dc.ChannelReserve.TlvType()]; ok && val == nil {	150✔
108	var rec tlv.RecordT[tlv.TlvType6, btcutil.Amount]	50✔
109	rec.Val = btcutil.Amount(reserve.Val)	50✔
110	dc.ChannelReserve = tlv.SomeRecordT(rec)	50✔
111	}	50✔
112	if val, ok := typeMap[dc.CsvDelay.TlvType()]; ok && val == nil {	140✔
113	dc.CsvDelay = tlv.SomeRecordT(csvDelay)	40✔
114	}	40✔
115	if val, ok := typeMap[dc.MaxAcceptedHTLCs.TlvType()]; ok && val == nil {	143✔
116	dc.MaxAcceptedHTLCs = tlv.SomeRecordT(maxHtlcs)	43✔
117	}	43✔
118	if val, ok := typeMap[dc.ChannelType.TlvType()]; ok && val == nil {	150✔
119	dc.ChannelType = tlv.SomeRecordT(chanType)	50✔
120	}	50✔
121
122	if len(tlvRecords) != 0 {	198✔
123	dc.ExtraData = tlvRecords	98✔
124	}	98✔
125
126	return nil	100✔
127	}
128
129	// MsgType returns the MessageType code which uniquely identifies this message
130	// as a DynCommit on the wire.
131	//
132	// This is part of the lnwire.Message interface.
133	func (dc *DynCommit) MsgType() MessageType {	100✔
134	return MsgDynCommit	100✔
135	}	100✔

lightningnetwork / lnd / 15858991938

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