16338168815

Committed 17 Jul 2025 06:45AM UTC coverage: 57.555% (-0.02%) from 57.577%

Build # 16338168815

Build Type

Pull #10072

github

Committed by

web-flow

Commit Message

Merge c3fbbc73d into 47e9f05dd

Pull Request Pull Request #10072: [1/2] lnwire: fix encoding customized TLV records

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6.67

/lnwire/channel_update_2.go

package lnwire

import (
        "bytes"
        "fmt"
        "io"

        "github.com/btcsuite/btcd/chaincfg"
        "github.com/btcsuite/btcd/chaincfg/chainhash"
        "github.com/lightningnetwork/lnd/tlv"
)

const (
        defaultCltvExpiryDelta           = uint16(80)
        defaultHtlcMinMsat               = MilliSatoshi(1)
        defaultFeeBaseMsat               = uint32(1000)
        defaultFeeProportionalMillionths = uint32(1)
)

// ChannelUpdate2 message is used after taproot channel has been initially
// announced. Each side independently announces its fees and minimum expiry for
// HTLCs and other parameters. This message is also used to redeclare initially
// set channel parameters.
type ChannelUpdate2 struct {
        // Signature is used to validate the announced data and prove the
        // ownership of node id.
        Signature Sig

        // ChainHash denotes the target chain that this channel was opened
        // within. This value should be the genesis hash of the target chain.
        // Along with the short channel ID, this uniquely identifies the
        // channel globally in a blockchain.
        ChainHash tlv.RecordT[tlv.TlvType0, chainhash.Hash]

        // ShortChannelID is the unique description of the funding transaction.
        ShortChannelID tlv.RecordT[tlv.TlvType2, ShortChannelID]

        // BlockHeight allows ordering in the case of multiple announcements. We
        // should ignore the message if block height is not greater than the
        // last-received. The block height must always be greater or equal to
        // the block height that the channel funding transaction was confirmed
        // in.
        BlockHeight tlv.RecordT[tlv.TlvType4, uint32]

        // DisabledFlags is an optional bitfield that describes various reasons
        // that the node is communicating that the channel should be considered
        // disabled.
        DisabledFlags tlv.RecordT[tlv.TlvType6, ChanUpdateDisableFlags]

        // SecondPeer is used to indicate which node the channel node has
        // created and signed this message. If this field is present, it was
        // node 2 otherwise it was node 1.
        SecondPeer tlv.OptionalRecordT[tlv.TlvType8, TrueBoolean]

        // CLTVExpiryDelta is the minimum number of blocks this node requires to
        // be added to the expiry of HTLCs. This is a security parameter
        // determined by the node operator. This value represents the required
        // gap between the time locks of the incoming and outgoing HTLC's set
        // to this node.
        CLTVExpiryDelta tlv.RecordT[tlv.TlvType10, uint16]

        // HTLCMinimumMsat is the minimum HTLC value which will be accepted.
        HTLCMinimumMsat tlv.RecordT[tlv.TlvType12, MilliSatoshi]

        // HtlcMaximumMsat is the maximum HTLC value which will be accepted.
        HTLCMaximumMsat tlv.RecordT[tlv.TlvType14, MilliSatoshi]

        // FeeBaseMsat is the base fee that must be used for incoming HTLC's to
        // this particular channel. This value will be tacked onto the required
        // for a payment independent of the size of the payment.
        FeeBaseMsat tlv.RecordT[tlv.TlvType16, uint32]

        // FeeProportionalMillionths is the fee rate that will be charged per
        // millionth of a satoshi.
        FeeProportionalMillionths tlv.RecordT[tlv.TlvType18, uint32]

        // ExtraOpaqueData 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.
        ExtraOpaqueData ExtraOpaqueData
}

// Decode deserializes a serialized ChannelUpdate2 stored in the passed
// io.Reader observing the specified protocol version.
//
// This is part of the lnwire.Message interface.
func (c *ChannelUpdate2) Decode(r io.Reader, _ uint32) error {
        err := ReadElement(r, &c.Signature)
        if err != nil {
                return err
        }
        c.Signature.ForceSchnorr()

        return c.DecodeTLVRecords(r)
}

// DecodeTLVRecords decodes only the TLV section of the message.
func (c *ChannelUpdate2) DecodeTLVRecords(r io.Reader) error {
        // First extract into extra opaque data.
        var tlvRecords ExtraOpaqueData
        if err := ReadElement(r, &tlvRecords); err != nil {
                return err
        }

        var (
                chainHash  = tlv.ZeroRecordT[tlv.TlvType0, [32]byte]()
                secondPeer = tlv.ZeroRecordT[tlv.TlvType8, TrueBoolean]()
        )
        knownRecords, extraData, err := ParseAndExtractExtraData(
                tlvRecords, &chainHash, &c.ShortChannelID, &c.BlockHeight,
                &c.DisabledFlags, &secondPeer, &c.CLTVExpiryDelta,
                &c.HTLCMinimumMsat, &c.HTLCMaximumMsat, &c.FeeBaseMsat,
                &c.FeeProportionalMillionths,
        )
        if err != nil {
                return err
        }

        // By default, the chain-hash is the bitcoin mainnet genesis block hash.
        c.ChainHash.Val = *chaincfg.MainNetParams.GenesisHash
        if _, ok := knownRecords[c.ChainHash.TlvType()]; ok {
                c.ChainHash.Val = chainHash.Val
        }

        // The presence of the second_peer tlv type indicates "true".
        if _, ok := knownRecords[c.SecondPeer.TlvType()]; ok {
                c.SecondPeer = tlv.SomeRecordT(secondPeer)
        }

        // If the CLTV expiry delta was not encoded, then set it to the default
        // value.
        if _, ok := knownRecords[c.CLTVExpiryDelta.TlvType()]; !ok {
                c.CLTVExpiryDelta.Val = defaultCltvExpiryDelta
        }

        // If the HTLC Minimum msat was not encoded, then set it to the default
        // value.
        if _, ok := knownRecords[c.HTLCMinimumMsat.TlvType()]; !ok {
                c.HTLCMinimumMsat.Val = defaultHtlcMinMsat
        }

        // If the base fee was not encoded, then set it to the default value.
        if _, ok := knownRecords[c.FeeBaseMsat.TlvType()]; !ok {
                c.FeeBaseMsat.Val = defaultFeeBaseMsat
        }

        // If the proportional fee was not encoded, then set it to the default
        // value.
        if _, ok := knownRecords[c.FeeProportionalMillionths.TlvType()]; !ok {
                c.FeeProportionalMillionths.Val = defaultFeeProportionalMillionths //nolint:ll
        }

        c.ExtraOpaqueData = extraData

        return c.ExtraOpaqueData.ValidateTLV()
}

// Encode serializes the target ChannelUpdate2 into the passed io.Writer
// observing the protocol version specified.
//
// This is part of the lnwire.Message interface.
func (c *ChannelUpdate2) Encode(w *bytes.Buffer, _ uint32) error {
        _, err := w.Write(c.Signature.RawBytes())
        if err != nil {
                return err
        }

        tlvRecords, err := c.DataToSign()
        if err != nil {
                return err
        }

        return WriteBytes(w, tlvRecords)
}

// DataToSign is used to retrieve part of the announcement message which should
// be signed. For the ChannelUpdate2 message, this includes the serialised TLV
// records.
func (c *ChannelUpdate2) DataToSign() ([]byte, error) {
        producers, err := c.ExtraOpaqueData.RecordProducers()
        if err != nil {
                return nil, err
        }

        // The chain-hash record is only included if it is _not_ equal to the
        // bitcoin mainnet genisis block hash.
        if !c.ChainHash.Val.IsEqual(chaincfg.MainNetParams.GenesisHash) {
                hash := tlv.ZeroRecordT[tlv.TlvType0, [32]byte]()
                hash.Val = c.ChainHash.Val

                producers = append(producers, &hash)
        }

        producers = append(producers,
                &c.ShortChannelID, &c.BlockHeight,
        )

        // Only include the disable flags if any bit is set.
        if !c.DisabledFlags.Val.IsEnabled() {
                producers = append(producers, &c.DisabledFlags)
        }

        // We only need to encode the second peer boolean if it is true
        c.SecondPeer.WhenSome(func(r tlv.RecordT[tlv.TlvType8, TrueBoolean]) {
                producers = append(producers, &r)
        })

        // We only encode the cltv expiry delta if it is not equal to the
        // default.
        if c.CLTVExpiryDelta.Val != defaultCltvExpiryDelta {
                producers = append(producers, &c.CLTVExpiryDelta)
        }

        if c.HTLCMinimumMsat.Val != defaultHtlcMinMsat {
                producers = append(producers, &c.HTLCMinimumMsat)
        }

        producers = append(producers, &c.HTLCMaximumMsat)

        if c.FeeBaseMsat.Val != defaultFeeBaseMsat {
                producers = append(producers, &c.FeeBaseMsat)
        }

        if c.FeeProportionalMillionths.Val != defaultFeeProportionalMillionths {
                producers = append(
                        producers, &c.FeeProportionalMillionths,
                )
        }

        var tlvData ExtraOpaqueData
        err = tlvData.PackRecords(producers...)
        if err != nil {
                return nil, err
        }

        return tlvData, nil
}

// MsgType returns the integer uniquely identifying this message type on the
// wire.
//
// This is part of the lnwire.Message interface.
func (c *ChannelUpdate2) MsgType() MessageType {
        return MsgChannelUpdate2
}

// SerializedSize returns the serialized size of the message in bytes.
//
// This is part of the lnwire.SizeableMessage interface.
func (c *ChannelUpdate2) SerializedSize() (uint32, error) {
        return MessageSerializedSize(c)
}

func (c *ChannelUpdate2) ExtraData() ExtraOpaqueData {
        return c.ExtraOpaqueData
}

// A compile time check to ensure ChannelUpdate2 implements the
// lnwire.Message interface.
var _ Message = (*ChannelUpdate2)(nil)

// SCID returns the ShortChannelID of the channel that the update applies to.
//
// NOTE: this is part of the ChannelUpdate interface.
func (c *ChannelUpdate2) SCID() ShortChannelID {
        return c.ShortChannelID.Val
}

// IsNode1 is true if the update was produced by node 1 of the channel peers.
// Node 1 is the node with the lexicographically smaller public key.
//
// NOTE: this is part of the ChannelUpdate interface.
func (c *ChannelUpdate2) IsNode1() bool {
        return c.SecondPeer.IsNone()
}

// IsDisabled is true if the update is announcing that the channel should be
// considered disabled.
//
// NOTE: this is part of the ChannelUpdate interface.
func (c *ChannelUpdate2) IsDisabled() bool {
        return !c.DisabledFlags.Val.IsEnabled()
}

// GetChainHash returns the hash of the chain that the message is referring to.
//
// NOTE: this is part of the ChannelUpdate interface.
func (c *ChannelUpdate2) GetChainHash() chainhash.Hash {
        return c.ChainHash.Val
}

// ForwardingPolicy returns the set of forwarding constraints of the update.
//
// NOTE: this is part of the ChannelUpdate interface.
func (c *ChannelUpdate2) ForwardingPolicy() *ForwardingPolicy {
        return &ForwardingPolicy{
                TimeLockDelta: c.CLTVExpiryDelta.Val,
                BaseFee:       MilliSatoshi(c.FeeBaseMsat.Val),
                FeeRate:       MilliSatoshi(c.FeeProportionalMillionths.Val),
                MinHTLC:       c.HTLCMinimumMsat.Val,
                HasMaxHTLC:    true,
                MaxHTLC:       c.HTLCMaximumMsat.Val,
        }
}

// CmpAge can be used to determine if the update is older or newer than the
// passed update. It returns 1 if this update is newer, -1 if it is older, and
// 0 if they are the same age.
//
// NOTE: this is part of the ChannelUpdate interface.
func (c *ChannelUpdate2) CmpAge(update ChannelUpdate) (CompareResult, error) {
        other, ok := update.(*ChannelUpdate2)
        if !ok {
                return 0, fmt.Errorf("expected *ChannelUpdate2, got: %T",
                        update)
        }

        switch {
        case c.BlockHeight.Val > other.BlockHeight.Val:
                return GreaterThan, nil
        case c.BlockHeight.Val < other.BlockHeight.Val:
                return LessThan, nil
        default:
                return EqualTo, nil
        }
}

// SetDisabledFlag can be used to adjust the disabled flag of an update.
//
// NOTE: this is part of the ChannelUpdate interface.
func (c *ChannelUpdate2) SetDisabledFlag(disabled bool) {
        if disabled {
                c.DisabledFlags.Val |= ChanUpdateDisableIncoming
                c.DisabledFlags.Val |= ChanUpdateDisableOutgoing
        } else {
                c.DisabledFlags.Val &^= ChanUpdateDisableIncoming
                c.DisabledFlags.Val &^= ChanUpdateDisableOutgoing
        }
}

// SetSCID can be used to overwrite the SCID of the update.
//
// NOTE: this is part of the ChannelUpdate interface.
func (c *ChannelUpdate2) SetSCID(scid ShortChannelID) {
        c.ShortChannelID.Val = scid
}

// A compile time check to ensure ChannelUpdate2 implements the
// lnwire.ChannelUpdate interface.
var _ ChannelUpdate = (*ChannelUpdate2)(nil)

// ChanUpdateDisableFlags is a bit vector that can be used to indicate various
// reasons for the channel being marked as disabled.
type ChanUpdateDisableFlags uint8

const (
        // ChanUpdateDisableIncoming is a bit indicates that a channel is
        // disabled in the inbound direction meaning that the node broadcasting
        // the update is communicating that they cannot receive funds.
        ChanUpdateDisableIncoming ChanUpdateDisableFlags = 1 << iota

        // ChanUpdateDisableOutgoing is a bit indicates that a channel is
        // disabled in the outbound direction meaning that the node broadcasting
        // the update is communicating that they cannot send or route funds.
        ChanUpdateDisableOutgoing = 2
)

// IncomingDisabled returns true if the ChanUpdateDisableIncoming bit is set.
func (c ChanUpdateDisableFlags) IncomingDisabled() bool {
        return c&ChanUpdateDisableIncoming == ChanUpdateDisableIncoming
}

// OutgoingDisabled returns true if the ChanUpdateDisableOutgoing bit is set.
func (c ChanUpdateDisableFlags) OutgoingDisabled() bool {
        return c&ChanUpdateDisableOutgoing == ChanUpdateDisableOutgoing
}

// IsEnabled returns true if none of the disable bits are set.
func (c ChanUpdateDisableFlags) IsEnabled() bool {
        return c == 0
}

// String returns the bitfield flags as a string.
func (c ChanUpdateDisableFlags) String() string {
        return fmt.Sprintf("%08b", c)
}

// Record returns the tlv record for the disable flags.
func (c *ChanUpdateDisableFlags) Record() tlv.Record {
        return tlv.MakeStaticRecord(0, c, 1, encodeDisableFlags,
                decodeDisableFlags)
}

func encodeDisableFlags(w io.Writer, val interface{}, buf *[8]byte) error {
        if v, ok := val.(*ChanUpdateDisableFlags); ok {
                flagsInt := uint8(*v)

                return tlv.EUint8(w, &flagsInt, buf)
        }

        return tlv.NewTypeForEncodingErr(val, "lnwire.ChanUpdateDisableFlags")
}

func decodeDisableFlags(r io.Reader, val interface{}, buf *[8]byte,
        l uint64) error {

        if v, ok := val.(*ChanUpdateDisableFlags); ok {
                var flagsInt uint8
                err := tlv.DUint8(r, &flagsInt, buf, l)
                if err != nil {
                        return err
                }

                *v = ChanUpdateDisableFlags(flagsInt)

                return nil
        }

        return tlv.NewTypeForDecodingErr(val, "lnwire.ChanUpdateDisableFlags",
                l, l)
}

// TrueBoolean is a record that indicates true or false using the presence of
// the record. If the record is absent, it indicates false. If it is present,
// it indicates true.
type TrueBoolean struct{}

// Record returns the tlv record for the boolean entry.
func (b *TrueBoolean) Record() tlv.Record {
        return tlv.MakeStaticRecord(
                0, b, 0, booleanEncoder, booleanDecoder,
        )
}

func booleanEncoder(_ io.Writer, val interface{}, _ *[8]byte) error {
        if _, ok := val.(*TrueBoolean); ok {
                return nil
        }

        return tlv.NewTypeForEncodingErr(val, "TrueBoolean")
}

func booleanDecoder(_ io.Reader, val interface{}, _ *[8]byte,
        l uint64) error {

        if _, ok := val.(*TrueBoolean); ok && (l == 0 || l == 1) {
                return nil
        }

        return tlv.NewTypeForEncodingErr(val, "TrueBoolean")
}

1	package lnwire
2
3	import (
4	"bytes"
5	"fmt"
6	"io"
7
8	"github.com/btcsuite/btcd/chaincfg"
9	"github.com/btcsuite/btcd/chaincfg/chainhash"
10	"github.com/lightningnetwork/lnd/tlv"
11	)
12
13	const (
14	defaultCltvExpiryDelta = uint16(80)
15	defaultHtlcMinMsat = MilliSatoshi(1)
16	defaultFeeBaseMsat = uint32(1000)
17	defaultFeeProportionalMillionths = uint32(1)
18	)
19
20	// ChannelUpdate2 message is used after taproot channel has been initially
21	// announced. Each side independently announces its fees and minimum expiry for
22	// HTLCs and other parameters. This message is also used to redeclare initially
23	// set channel parameters.
24	type ChannelUpdate2 struct {
25	// Signature is used to validate the announced data and prove the
26	// ownership of node id.
27	Signature Sig
28
29	// ChainHash denotes the target chain that this channel was opened
30	// within. This value should be the genesis hash of the target chain.
31	// Along with the short channel ID, this uniquely identifies the
32	// channel globally in a blockchain.
33	ChainHash tlv.RecordT[tlv.TlvType0, chainhash.Hash]
34
35	// ShortChannelID is the unique description of the funding transaction.
36	ShortChannelID tlv.RecordT[tlv.TlvType2, ShortChannelID]
37
38	// BlockHeight allows ordering in the case of multiple announcements. We
39	// should ignore the message if block height is not greater than the
40	// last-received. The block height must always be greater or equal to
41	// the block height that the channel funding transaction was confirmed
42	// in.
43	BlockHeight tlv.RecordT[tlv.TlvType4, uint32]
44
45	// DisabledFlags is an optional bitfield that describes various reasons
46	// that the node is communicating that the channel should be considered
47	// disabled.
48	DisabledFlags tlv.RecordT[tlv.TlvType6, ChanUpdateDisableFlags]
49
50	// SecondPeer is used to indicate which node the channel node has
51	// created and signed this message. If this field is present, it was
52	// node 2 otherwise it was node 1.
53	SecondPeer tlv.OptionalRecordT[tlv.TlvType8, TrueBoolean]
54
55	// CLTVExpiryDelta is the minimum number of blocks this node requires to
56	// be added to the expiry of HTLCs. This is a security parameter
57	// determined by the node operator. This value represents the required
58	// gap between the time locks of the incoming and outgoing HTLC's set
59	// to this node.
60	CLTVExpiryDelta tlv.RecordT[tlv.TlvType10, uint16]
61
62	// HTLCMinimumMsat is the minimum HTLC value which will be accepted.
63	HTLCMinimumMsat tlv.RecordT[tlv.TlvType12, MilliSatoshi]
64
65	// HtlcMaximumMsat is the maximum HTLC value which will be accepted.
66	HTLCMaximumMsat tlv.RecordT[tlv.TlvType14, MilliSatoshi]
67
68	// FeeBaseMsat is the base fee that must be used for incoming HTLC's to
69	// this particular channel. This value will be tacked onto the required
70	// for a payment independent of the size of the payment.
71	FeeBaseMsat tlv.RecordT[tlv.TlvType16, uint32]
72
73	// FeeProportionalMillionths is the fee rate that will be charged per
74	// millionth of a satoshi.
75	FeeProportionalMillionths tlv.RecordT[tlv.TlvType18, uint32]
76
77	// ExtraOpaqueData is the set of data that was appended to this message
78	// to fill out the full maximum transport message size. These fields can
79	// be used to specify optional data such as custom TLV fields.
80	ExtraOpaqueData ExtraOpaqueData
81	}
82
83	// Decode deserializes a serialized ChannelUpdate2 stored in the passed
84	// io.Reader observing the specified protocol version.
85	//
86	// This is part of the lnwire.Message interface.
87	func (c *ChannelUpdate2) Decode(r io.Reader, _ uint32) error {	×
88	err := ReadElement(r, &c.Signature)	×
89	if err != nil {	×
90	return err	×
91	}	×
92	c.Signature.ForceSchnorr()	×
93		×
94	return c.DecodeTLVRecords(r)	×
95	}
96
97	// DecodeTLVRecords decodes only the TLV section of the message.
98	func (c *ChannelUpdate2) DecodeTLVRecords(r io.Reader) error {	×
99	// First extract into extra opaque data.	×
100	var tlvRecords ExtraOpaqueData	×
NEW 101	if err := ReadElement(r, &tlvRecords); err != nil {	×
102	return err	×
103	}	×
104
105	var (	×
106	chainHash = tlv.ZeroRecordT[tlv.TlvType0, [32]byte]()	×
107	secondPeer = tlv.ZeroRecordT[tlv.TlvType8, TrueBoolean]()	×
108	)	×
NEW 109	knownRecords, extraData, err := ParseAndExtractExtraData(	×
NEW 110	tlvRecords, &chainHash, &c.ShortChannelID, &c.BlockHeight,	×
NEW 111	&c.DisabledFlags, &secondPeer, &c.CLTVExpiryDelta,	×
NEW 112	&c.HTLCMinimumMsat, &c.HTLCMaximumMsat, &c.FeeBaseMsat,	×
113	&c.FeeProportionalMillionths,	×
114	)	×
115	if err != nil {	×
116	return err	×
117	}	×
118
119	// By default, the chain-hash is the bitcoin mainnet genesis block hash.
120	c.ChainHash.Val = *chaincfg.MainNetParams.GenesisHash	×
NEW 121	if _, ok := knownRecords[c.ChainHash.TlvType()]; ok {	×
122	c.ChainHash.Val = chainHash.Val	×
123	}	×
124
125	// The presence of the second_peer tlv type indicates "true".
NEW 126	if _, ok := knownRecords[c.SecondPeer.TlvType()]; ok {	×
127	c.SecondPeer = tlv.SomeRecordT(secondPeer)	×
128	}	×
129
130	// If the CLTV expiry delta was not encoded, then set it to the default
131	// value.
NEW 132	if _, ok := knownRecords[c.CLTVExpiryDelta.TlvType()]; !ok {	×
133	c.CLTVExpiryDelta.Val = defaultCltvExpiryDelta	×
134	}	×
135
136	// If the HTLC Minimum msat was not encoded, then set it to the default
137	// value.
NEW 138	if _, ok := knownRecords[c.HTLCMinimumMsat.TlvType()]; !ok {	×
139	c.HTLCMinimumMsat.Val = defaultHtlcMinMsat	×
140	}	×
141
142	// If the base fee was not encoded, then set it to the default value.
NEW 143	if _, ok := knownRecords[c.FeeBaseMsat.TlvType()]; !ok {	×
144	c.FeeBaseMsat.Val = defaultFeeBaseMsat	×
145	}	×
146
147	// If the proportional fee was not encoded, then set it to the default
148	// value.
NEW 149	if _, ok := knownRecords[c.FeeProportionalMillionths.TlvType()]; !ok {	×
150	c.FeeProportionalMillionths.Val = defaultFeeProportionalMillionths //nolint:ll	×
151	}	×
152
NEW 153	c.ExtraOpaqueData = extraData	×
154		×
155	return c.ExtraOpaqueData.ValidateTLV()	×
156	}
157
158	// Encode serializes the target ChannelUpdate2 into the passed io.Writer
159	// observing the protocol version specified.
160	//
161	// This is part of the lnwire.Message interface.
162	func (c ChannelUpdate2) Encode(w bytes.Buffer, _ uint32) error {	×
163	_, err := w.Write(c.Signature.RawBytes())	×
164	if err != nil {	×
165	return err	×
166	}	×
167
NEW 168	tlvRecords, err := c.DataToSign()	×
169	if err != nil {	×
170	return err	×
171	}	×
172
NEW 173	return WriteBytes(w, tlvRecords)	×
174	}
175
176	// DataToSign is used to retrieve part of the announcement message which should
177	// be signed. For the ChannelUpdate2 message, this includes the serialised TLV
178	// records.
179	func (c *ChannelUpdate2) DataToSign() ([]byte, error) {	×
NEW 180	producers, err := c.ExtraOpaqueData.RecordProducers()	×
NEW 181	if err != nil {	×
NEW 182	return nil, err	×
NEW 183	}	×
184
185	// The chain-hash record is only included if it is _not_ equal to the
186	// bitcoin mainnet genisis block hash.
187	if !c.ChainHash.Val.IsEqual(chaincfg.MainNetParams.GenesisHash) {	×
188	hash := tlv.ZeroRecordT[tlv.TlvType0, [32]byte]()	×
189	hash.Val = c.ChainHash.Val	×
190		×
NEW 191	producers = append(producers, &hash)	×
192	}	×
193
NEW 194	producers = append(producers,	×
195	&c.ShortChannelID, &c.BlockHeight,	×
196	)	×
197		×
198	// Only include the disable flags if any bit is set.	×
199	if !c.DisabledFlags.Val.IsEnabled() {	×
NEW 200	producers = append(producers, &c.DisabledFlags)	×
201	}	×
202
203	// We only need to encode the second peer boolean if it is true
204	c.SecondPeer.WhenSome(func(r tlv.RecordT[tlv.TlvType8, TrueBoolean]) {	×
NEW 205	producers = append(producers, &r)	×
206	})	×
207
208	// We only encode the cltv expiry delta if it is not equal to the
209	// default.
210	if c.CLTVExpiryDelta.Val != defaultCltvExpiryDelta {	×
NEW 211	producers = append(producers, &c.CLTVExpiryDelta)	×
212	}	×
213
214	if c.HTLCMinimumMsat.Val != defaultHtlcMinMsat {	×
NEW 215	producers = append(producers, &c.HTLCMinimumMsat)	×
216	}	×
217
NEW 218	producers = append(producers, &c.HTLCMaximumMsat)	×
219		×
220	if c.FeeBaseMsat.Val != defaultFeeBaseMsat {	×
NEW 221	producers = append(producers, &c.FeeBaseMsat)	×
222	}	×
223
224	if c.FeeProportionalMillionths.Val != defaultFeeProportionalMillionths {	×
NEW 225	producers = append(	×
NEW 226	producers, &c.FeeProportionalMillionths,	×
227	)	×
228	}	×
229
NEW 230	var tlvData ExtraOpaqueData	×
NEW 231	err = tlvData.PackRecords(producers...)	×
232	if err != nil {	×
233	return nil, err	×
234	}	×
235
NEW 236	return tlvData, nil	×
237	}
238
239	// MsgType returns the integer uniquely identifying this message type on the
240	// wire.
241	//
242	// This is part of the lnwire.Message interface.
243	func (c *ChannelUpdate2) MsgType() MessageType {	×
244	return MsgChannelUpdate2	×
245	}	×
246
247	// SerializedSize returns the serialized size of the message in bytes.
248	//
249	// This is part of the lnwire.SizeableMessage interface.
250	func (c *ChannelUpdate2) SerializedSize() (uint32, error) {	×
251	return MessageSerializedSize(c)	×
252	}	×
253
254	func (c *ChannelUpdate2) ExtraData() ExtraOpaqueData {	×
255	return c.ExtraOpaqueData	×
256	}	×
257
258	// A compile time check to ensure ChannelUpdate2 implements the
259	// lnwire.Message interface.
260	var _ Message = (*ChannelUpdate2)(nil)
261
262	// SCID returns the ShortChannelID of the channel that the update applies to.
263	//
264	// NOTE: this is part of the ChannelUpdate interface.
265	func (c *ChannelUpdate2) SCID() ShortChannelID {	×
266	return c.ShortChannelID.Val	×
267	}	×
268
269	// IsNode1 is true if the update was produced by node 1 of the channel peers.
270	// Node 1 is the node with the lexicographically smaller public key.
271	//
272	// NOTE: this is part of the ChannelUpdate interface.
273	func (c *ChannelUpdate2) IsNode1() bool {	×
274	return c.SecondPeer.IsNone()	×
275	}	×
276
277	// IsDisabled is true if the update is announcing that the channel should be
278	// considered disabled.
279	//
280	// NOTE: this is part of the ChannelUpdate interface.
281	func (c *ChannelUpdate2) IsDisabled() bool {	×
282	return !c.DisabledFlags.Val.IsEnabled()	×
283	}	×
284
285	// GetChainHash returns the hash of the chain that the message is referring to.
286	//
287	// NOTE: this is part of the ChannelUpdate interface.
288	func (c *ChannelUpdate2) GetChainHash() chainhash.Hash {	×
289	return c.ChainHash.Val	×
290	}	×
291
292	// ForwardingPolicy returns the set of forwarding constraints of the update.
293	//
294	// NOTE: this is part of the ChannelUpdate interface.
295	func (c ChannelUpdate2) ForwardingPolicy() ForwardingPolicy {	×
296	return &ForwardingPolicy{	×
297	TimeLockDelta: c.CLTVExpiryDelta.Val,	×
298	BaseFee: MilliSatoshi(c.FeeBaseMsat.Val),	×
299	FeeRate: MilliSatoshi(c.FeeProportionalMillionths.Val),	×
300	MinHTLC: c.HTLCMinimumMsat.Val,	×
301	HasMaxHTLC: true,	×
302	MaxHTLC: c.HTLCMaximumMsat.Val,	×
303	}	×
304	}	×
305
306	// CmpAge can be used to determine if the update is older or newer than the
307	// passed update. It returns 1 if this update is newer, -1 if it is older, and
308	// 0 if they are the same age.
309	//
310	// NOTE: this is part of the ChannelUpdate interface.
311	func (c *ChannelUpdate2) CmpAge(update ChannelUpdate) (CompareResult, error) {	×
312	other, ok := update.(*ChannelUpdate2)	×
313	if !ok {	×
314	return 0, fmt.Errorf("expected *ChannelUpdate2, got: %T",	×
315	update)	×
316	}	×
317
318	switch {	×
319	case c.BlockHeight.Val > other.BlockHeight.Val:	×
320	return GreaterThan, nil	×
321	case c.BlockHeight.Val < other.BlockHeight.Val:	×
322	return LessThan, nil	×
323	default:	×
324	return EqualTo, nil	×
325	}
326	}
327
328	// SetDisabledFlag can be used to adjust the disabled flag of an update.
329	//
330	// NOTE: this is part of the ChannelUpdate interface.
331	func (c *ChannelUpdate2) SetDisabledFlag(disabled bool) {	×
332	if disabled {	×
333	c.DisabledFlags.Val \|= ChanUpdateDisableIncoming	×
334	c.DisabledFlags.Val \|= ChanUpdateDisableOutgoing	×
335	} else {	×
336	c.DisabledFlags.Val &^= ChanUpdateDisableIncoming	×
337	c.DisabledFlags.Val &^= ChanUpdateDisableOutgoing	×
338	}	×
339	}
340
341	// SetSCID can be used to overwrite the SCID of the update.
342	//
343	// NOTE: this is part of the ChannelUpdate interface.
344	func (c *ChannelUpdate2) SetSCID(scid ShortChannelID) {	×
345	c.ShortChannelID.Val = scid	×
346	}	×
347
348	// A compile time check to ensure ChannelUpdate2 implements the
349	// lnwire.ChannelUpdate interface.
350	var _ ChannelUpdate = (*ChannelUpdate2)(nil)
351
352	// ChanUpdateDisableFlags is a bit vector that can be used to indicate various
353	// reasons for the channel being marked as disabled.
354	type ChanUpdateDisableFlags uint8
355
356	const (
357	// ChanUpdateDisableIncoming is a bit indicates that a channel is
358	// disabled in the inbound direction meaning that the node broadcasting
359	// the update is communicating that they cannot receive funds.
360	ChanUpdateDisableIncoming ChanUpdateDisableFlags = 1 << iota
361
362	// ChanUpdateDisableOutgoing is a bit indicates that a channel is
363	// disabled in the outbound direction meaning that the node broadcasting
364	// the update is communicating that they cannot send or route funds.
365	ChanUpdateDisableOutgoing = 2
366	)
367
368	// IncomingDisabled returns true if the ChanUpdateDisableIncoming bit is set.
369	func (c ChanUpdateDisableFlags) IncomingDisabled() bool {	×
370	return c&ChanUpdateDisableIncoming == ChanUpdateDisableIncoming	×
371	}	×
372
373	// OutgoingDisabled returns true if the ChanUpdateDisableOutgoing bit is set.
374	func (c ChanUpdateDisableFlags) OutgoingDisabled() bool {	×
375	return c&ChanUpdateDisableOutgoing == ChanUpdateDisableOutgoing	×
376	}	×
377
378	// IsEnabled returns true if none of the disable bits are set.
379	func (c ChanUpdateDisableFlags) IsEnabled() bool {	×
380	return c == 0	×
381	}	×
382
383	// String returns the bitfield flags as a string.
384	func (c ChanUpdateDisableFlags) String() string {	×
385	return fmt.Sprintf("%08b", c)	×
386	}	×
387
388	// Record returns the tlv record for the disable flags.
389	func (c *ChanUpdateDisableFlags) Record() tlv.Record {	×
390	return tlv.MakeStaticRecord(0, c, 1, encodeDisableFlags,	×
391	decodeDisableFlags)	×
392	}	×
393
394	func encodeDisableFlags(w io.Writer, val interface{}, buf *[8]byte) error {	×
395	if v, ok := val.(*ChanUpdateDisableFlags); ok {	×
396	flagsInt := uint8(*v)	×
397		×
398	return tlv.EUint8(w, &flagsInt, buf)	×
399	}	×
400
401	return tlv.NewTypeForEncodingErr(val, "lnwire.ChanUpdateDisableFlags")	×
402	}
403
404	func decodeDisableFlags(r io.Reader, val interface{}, buf *[8]byte,
405	l uint64) error {	×
406		×
407	if v, ok := val.(*ChanUpdateDisableFlags); ok {	×
408	var flagsInt uint8	×
409	err := tlv.DUint8(r, &flagsInt, buf, l)	×
410	if err != nil {	×
411	return err	×
412	}	×
413
414	*v = ChanUpdateDisableFlags(flagsInt)	×
415		×
416	return nil	×
417	}
418
419	return tlv.NewTypeForDecodingErr(val, "lnwire.ChanUpdateDisableFlags",	×
420	l, l)	×
421	}
422
423	// TrueBoolean is a record that indicates true or false using the presence of
424	// the record. If the record is absent, it indicates false. If it is present,
425	// it indicates true.
426	type TrueBoolean struct{}
427
428	// Record returns the tlv record for the boolean entry.
429	func (b *TrueBoolean) Record() tlv.Record {	3✔
430	return tlv.MakeStaticRecord(	3✔
431	0, b, 0, booleanEncoder, booleanDecoder,	3✔
432	)	3✔
433	}	3✔
434
435	func booleanEncoder(_ io.Writer, val interface{}, _ *[8]byte) error {	3✔
436	if _, ok := val.(*TrueBoolean); ok {	6✔
437	return nil	3✔
438	}	3✔
439
440	return tlv.NewTypeForEncodingErr(val, "TrueBoolean")	×
441	}
442
443	func booleanDecoder(_ io.Reader, val interface{}, _ *[8]byte,
444	l uint64) error {	3✔
445		3✔
446	if _, ok := val.(*TrueBoolean); ok && (l == 0 \|\| l == 1) {	6✔
447	return nil	3✔
448	}	3✔
449
450	return tlv.NewTypeForEncodingErr(val, "TrueBoolean")	×
451	}

lightningnetwork / lnd / 16338168815

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