16990665124

Committed 15 Aug 2025 01:10PM UTC coverage: 66.74% (-0.03%) from 66.765%

Build # 16990665124

Build Type

Pull #9455

github

Committed by

web-flow

Commit Message

Merge 035fac41d into fb1adfc21

Pull Request Pull Request #9455: [1/2] discovery+lnwire: add support for DNS host name in NodeAnnouncement msg

Run Details

116 of 188 new or added lines in 8 files covered. (61.7%)

110 existing lines in 23 files now uncovered.

136011 of 203791 relevant lines covered (66.74%)

21482.89 hits per line

Source File
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83.01

/lnwire/writer.go

package lnwire

import (
        "bytes"
        "encoding/binary"
        "errors"
        "fmt"
        "image/color"
        "math"
        "net"

        "github.com/btcsuite/btcd/btcec/v2"
        "github.com/btcsuite/btcd/btcutil"
        "github.com/btcsuite/btcd/wire"
        "github.com/lightningnetwork/lnd/tor"
)

var (
        // ErrNilFeatureVector is returned when the supplied feature is nil.
        ErrNilFeatureVector = errors.New("cannot write nil feature vector")

        // ErrPkScriptTooLong is returned when the length of the provided
        // script exceeds 34.
        ErrPkScriptTooLong = errors.New("'PkScript' too long")

        // ErrNilTCPAddress is returned when the supplied address is nil.
        ErrNilTCPAddress = errors.New("cannot write nil TCPAddr")

        // ErrNilOnionAddress is returned when the supplied address is nil.
        ErrNilOnionAddress = errors.New("cannot write nil onion address")

        // ErrNilNetAddress is returned when a nil value is used in []net.Addr.
        ErrNilNetAddress = errors.New("cannot write nil address")

        // ErrNilOpaqueAddrs is returned when the supplied address is nil.
        ErrNilOpaqueAddrs = errors.New("cannot write nil OpaqueAddrs")

        // ErrNilDNSAddress is returned when the supplied address is nil.
        ErrNilDNSAddress = errors.New("cannot write nil DNS address")

        // ErrNilPublicKey is returned when a nil pubkey is used.
        ErrNilPublicKey = errors.New("cannot write nil pubkey")

        // ErrUnknownServiceLength is returned when the onion service length is
        // unknown.
        ErrUnknownServiceLength = errors.New("unknown onion service length")
)

// ErrOutpointIndexTooBig is used when the outpoint index exceeds the max value
// of uint16.
func ErrOutpointIndexTooBig(index uint32) error {
        return fmt.Errorf(
                "index for outpoint (%v) is greater than "+
                        "max index of %v", index, math.MaxUint16,
        )
}

// WriteBytes appends the given bytes to the provided buffer.
func WriteBytes(buf *bytes.Buffer, b []byte) error {
        _, err := buf.Write(b)
        return err
}

// WriteUint8 appends the uint8 to the provided buffer.
func WriteUint8(buf *bytes.Buffer, n uint8) error {
        _, err := buf.Write([]byte{n})
        return err
}

// WriteUint16 appends the uint16 to the provided buffer. It encodes the
// integer using big endian byte order.
func WriteUint16(buf *bytes.Buffer, n uint16) error {
        var b [2]byte
        binary.BigEndian.PutUint16(b[:], n)
        _, err := buf.Write(b[:])
        return err
}

// WriteUint32 appends the uint32 to the provided buffer. It encodes the
// integer using big endian byte order.
func WriteUint32(buf *bytes.Buffer, n uint32) error {
        var b [4]byte
        binary.BigEndian.PutUint32(b[:], n)
        _, err := buf.Write(b[:])
        return err
}

// WriteUint64 appends the uint64 to the provided buffer. It encodes the
// integer using big endian byte order.
func WriteUint64(buf *bytes.Buffer, n uint64) error {
        var b [8]byte
        binary.BigEndian.PutUint64(b[:], n)
        _, err := buf.Write(b[:])
        return err
}

// WriteSatoshi appends the Satoshi value to the provided buffer.
func WriteSatoshi(buf *bytes.Buffer, amount btcutil.Amount) error {
        return WriteUint64(buf, uint64(amount))
}

// WriteMilliSatoshi appends the MilliSatoshi value to the provided buffer.
func WriteMilliSatoshi(buf *bytes.Buffer, amount MilliSatoshi) error {
        return WriteUint64(buf, uint64(amount))
}

// WritePublicKey appends the compressed public key to the provided buffer.
func WritePublicKey(buf *bytes.Buffer, pub *btcec.PublicKey) error {
        if pub == nil {
                return ErrNilPublicKey
        }

        serializedPubkey := pub.SerializeCompressed()
        return WriteBytes(buf, serializedPubkey)
}

// WriteChannelID appends the ChannelID to the provided buffer.
func WriteChannelID(buf *bytes.Buffer, channelID ChannelID) error {
        return WriteBytes(buf, channelID[:])
}

// WriteNodeAlias appends the alias to the provided buffer.
func WriteNodeAlias(buf *bytes.Buffer, alias NodeAlias) error {
        return WriteBytes(buf, alias[:])
}

// WriteShortChannelID appends the ShortChannelID to the provided buffer. It
// encodes the BlockHeight and TxIndex each using 3 bytes with big endian byte
// order, and encodes txPosition using 2 bytes with big endian byte order.
func WriteShortChannelID(buf *bytes.Buffer, shortChanID ShortChannelID) error {
        // Check that field fit in 3 bytes and write the blockHeight
        if shortChanID.BlockHeight > ((1 << 24) - 1) {
                return errors.New("block height should fit in 3 bytes")
        }

        var blockHeight [4]byte
        binary.BigEndian.PutUint32(blockHeight[:], shortChanID.BlockHeight)

        if _, err := buf.Write(blockHeight[1:]); err != nil {
                return err
        }

        // Check that field fit in 3 bytes and write the txIndex
        if shortChanID.TxIndex > ((1 << 24) - 1) {
                return errors.New("tx index should fit in 3 bytes")
        }

        var txIndex [4]byte
        binary.BigEndian.PutUint32(txIndex[:], shortChanID.TxIndex)
        if _, err := buf.Write(txIndex[1:]); err != nil {
                return err
        }

        // Write the TxPosition
        return WriteUint16(buf, shortChanID.TxPosition)
}

// WriteSig appends the signature to the provided buffer.
func WriteSig(buf *bytes.Buffer, sig Sig) error {
        return WriteBytes(buf, sig.bytes[:])
}

// WriteSigs appends the slice of signatures to the provided buffer with its
// length.
func WriteSigs(buf *bytes.Buffer, sigs []Sig) error {
        // Write the length of the sigs.
        if err := WriteUint16(buf, uint16(len(sigs))); err != nil {
                return err
        }

        for _, sig := range sigs {
                if err := WriteSig(buf, sig); err != nil {
                        return err
                }
        }
        return nil
}

// WriteFailCode appends the FailCode to the provided buffer.
func WriteFailCode(buf *bytes.Buffer, e FailCode) error {
        return WriteUint16(buf, uint16(e))
}

// WriteRawFeatureVector encodes the feature using the feature's Encode method
// and appends the data to the provided buffer. An error will return if the
// passed feature is nil.
func WriteRawFeatureVector(buf *bytes.Buffer, feature *RawFeatureVector) error {
        if feature == nil {
                return ErrNilFeatureVector
        }

        return feature.Encode(buf)
}

// WriteColorRGBA appends the RGBA color using three bytes.
func WriteColorRGBA(buf *bytes.Buffer, e color.RGBA) error {
        // Write R
        if err := WriteUint8(buf, e.R); err != nil {
                return err
        }

        // Write G
        if err := WriteUint8(buf, e.G); err != nil {
                return err
        }

        // Write B
        return WriteUint8(buf, e.B)
}

// WriteQueryEncoding appends the QueryEncoding to the provided buffer.
func WriteQueryEncoding(buf *bytes.Buffer, e QueryEncoding) error {
        return WriteUint8(buf, uint8(e))
}

// WriteFundingFlag appends the FundingFlag to the provided buffer.
func WriteFundingFlag(buf *bytes.Buffer, flag FundingFlag) error {
        return WriteUint8(buf, uint8(flag))
}

// WriteChanUpdateMsgFlags appends the update flag to the provided buffer.
func WriteChanUpdateMsgFlags(buf *bytes.Buffer, f ChanUpdateMsgFlags) error {
        return WriteUint8(buf, uint8(f))
}

// WriteChanUpdateChanFlags appends the update flag to the provided buffer.
func WriteChanUpdateChanFlags(buf *bytes.Buffer, f ChanUpdateChanFlags) error {
        return WriteUint8(buf, uint8(f))
}

// WriteDeliveryAddress appends the address to the provided buffer.
func WriteDeliveryAddress(buf *bytes.Buffer, addr DeliveryAddress) error {
        return writeDataWithLength(buf, addr)
}

// WritePingPayload appends the payload to the provided buffer.
func WritePingPayload(buf *bytes.Buffer, payload PingPayload) error {
        return writeDataWithLength(buf, payload)
}

// WritePongPayload appends the payload to the provided buffer.
func WritePongPayload(buf *bytes.Buffer, payload PongPayload) error {
        return writeDataWithLength(buf, payload)
}

// WriteWarningData appends the data to the provided buffer.
func WriteWarningData(buf *bytes.Buffer, data WarningData) error {
        return writeDataWithLength(buf, data)
}

// WriteErrorData appends the data to the provided buffer.
func WriteErrorData(buf *bytes.Buffer, data ErrorData) error {
        return writeDataWithLength(buf, data)
}

// WriteOpaqueReason appends the reason to the provided buffer.
func WriteOpaqueReason(buf *bytes.Buffer, reason OpaqueReason) error {
        return writeDataWithLength(buf, reason)
}

// WriteBool appends the boolean to the provided buffer.
func WriteBool(buf *bytes.Buffer, b bool) error {
        if b {
                return WriteBytes(buf, []byte{1})
        }
        return WriteBytes(buf, []byte{0})
}

// WritePkScript appends the script to the provided buffer. Returns an error if
// the provided script exceeds 34 bytes.
func WritePkScript(buf *bytes.Buffer, s PkScript) error {
        // The largest script we'll accept is a p2wsh which is exactly
        // 34 bytes long.
        scriptLength := len(s)
        if scriptLength > 34 {
                return ErrPkScriptTooLong
        }

        return wire.WriteVarBytes(buf, 0, s)
}

// WriteOutPoint appends the outpoint to the provided buffer.
func WriteOutPoint(buf *bytes.Buffer, p wire.OutPoint) error {
        // Before we write anything to the buffer, check the Index is sane.
        if p.Index > math.MaxUint16 {
                return ErrOutpointIndexTooBig(p.Index)
        }

        var h [32]byte
        copy(h[:], p.Hash[:])
        if _, err := buf.Write(h[:]); err != nil {
                return err
        }

        // Write the index using two bytes.
        return WriteUint16(buf, uint16(p.Index))
}

// WriteTCPAddr appends the TCP address to the provided buffer, either a IPv4
// or a IPv6.
func WriteTCPAddr(buf *bytes.Buffer, addr *net.TCPAddr) error {
        if addr == nil {
                return ErrNilTCPAddress
        }

        // Make a slice of bytes to hold the data of descriptor and ip. At
        // most, we need 17 bytes - 1 byte for the descriptor, 16 bytes for
        // IPv6.
        data := make([]byte, 0, 17)

        if addr.IP.To4() != nil {
                data = append(data, uint8(tcp4Addr))
                data = append(data, addr.IP.To4()...)
        } else {
                data = append(data, uint8(tcp6Addr))
                data = append(data, addr.IP.To16()...)
        }

        if _, err := buf.Write(data); err != nil {
                return err
        }

        return WriteUint16(buf, uint16(addr.Port))
}

// WriteOnionAddr appends the onion address to the provided buffer.
func WriteOnionAddr(buf *bytes.Buffer, addr *tor.OnionAddr) error {
        if addr == nil {
                return ErrNilOnionAddress
        }

        var (
                suffixIndex int
                descriptor  []byte
        )

        // Decide the suffixIndex and descriptor.
        switch len(addr.OnionService) {
        case tor.V2Len:
                descriptor = []byte{byte(v2OnionAddr)}
                suffixIndex = tor.V2Len - tor.OnionSuffixLen

        case tor.V3Len:
                descriptor = []byte{byte(v3OnionAddr)}
                suffixIndex = tor.V3Len - tor.OnionSuffixLen

        default:
                return ErrUnknownServiceLength
        }

        // Decode the address.
        host, err := tor.Base32Encoding.DecodeString(
                addr.OnionService[:suffixIndex],
        )
        if err != nil {
                return err
        }

        // Perform the actual write when the above checks passed.
        if _, err := buf.Write(descriptor); err != nil {
                return err
        }
        if _, err := buf.Write(host); err != nil {
                return err
        }

        return WriteUint16(buf, uint16(addr.Port))
}

// WriteDNSAddress appends the DNS address to the provided buffer.
func WriteDNSAddress(buf *bytes.Buffer, addr *DNSAddress) error {
        if addr == nil {
                return ErrNilDNSAddress
        }

        // Write the descriptor, the hostname length, and the hostname.
        if _, err := buf.Write([]byte{byte(dnsAddr)}); err != nil {
                return err
        }

        if err := WriteUint8(buf, uint8(len(addr.Hostname))); err != nil {
                return err
        }

        if _, err := buf.WriteString(addr.Hostname); err != nil {
                return err
        }

        return WriteUint16(buf, addr.Port)
}

// WriteOpaqueAddrs appends the payload of the given OpaqueAddrs to buffer.
func WriteOpaqueAddrs(buf *bytes.Buffer, addr *OpaqueAddrs) error {
        if addr == nil {
                return ErrNilOpaqueAddrs
        }

        _, err := buf.Write(addr.Payload)
        return err
}

// WriteNetAddrs appends a slice of addresses to the provided buffer with the
// length info.
func WriteNetAddrs(buf *bytes.Buffer, addresses []net.Addr) error {
        // First, we'll encode all the addresses into an intermediate
        // buffer. We need to do this in order to compute the total
        // length of the addresses.
        buffer := make([]byte, 0, MaxMsgBody)
        addrBuf := bytes.NewBuffer(buffer)

        for _, address := range addresses {
                switch a := address.(type) {
                case *net.TCPAddr:
                        if err := WriteTCPAddr(addrBuf, a); err != nil {
                                return err
                        }
                case *tor.OnionAddr:
                        if err := WriteOnionAddr(addrBuf, a); err != nil {
                                return err
                        }
                case *OpaqueAddrs:
                        if err := WriteOpaqueAddrs(addrBuf, a); err != nil {
                                return err
                        }
                case *DNSAddress:
                        if err := WriteDNSAddress(addrBuf, a); err != nil {
                                return err
                        }
                default:
                        return ErrNilNetAddress
                }
        }

        // With the addresses fully encoded, we can now write out data.
        return writeDataWithLength(buf, addrBuf.Bytes())
}

// writeDataWithLength writes the data and its length to the buffer.
func writeDataWithLength(buf *bytes.Buffer, data []byte) error {
        var l [2]byte
        binary.BigEndian.PutUint16(l[:], uint16(len(data)))
        if _, err := buf.Write(l[:]); err != nil {
                return err
        }

        _, err := buf.Write(data)
        return err
}

1	package lnwire
2
3	import (
4	"bytes"
5	"encoding/binary"
6	"errors"
7	"fmt"
8	"image/color"
9	"math"
10	"net"
11
12	"github.com/btcsuite/btcd/btcec/v2"
13	"github.com/btcsuite/btcd/btcutil"
14	"github.com/btcsuite/btcd/wire"
15	"github.com/lightningnetwork/lnd/tor"
16	)
17
18	var (
19	// ErrNilFeatureVector is returned when the supplied feature is nil.
20	ErrNilFeatureVector = errors.New("cannot write nil feature vector")
21
22	// ErrPkScriptTooLong is returned when the length of the provided
23	// script exceeds 34.
24	ErrPkScriptTooLong = errors.New("'PkScript' too long")
25
26	// ErrNilTCPAddress is returned when the supplied address is nil.
27	ErrNilTCPAddress = errors.New("cannot write nil TCPAddr")
28
29	// ErrNilOnionAddress is returned when the supplied address is nil.
30	ErrNilOnionAddress = errors.New("cannot write nil onion address")
31
32	// ErrNilNetAddress is returned when a nil value is used in []net.Addr.
33	ErrNilNetAddress = errors.New("cannot write nil address")
34
35	// ErrNilOpaqueAddrs is returned when the supplied address is nil.
36	ErrNilOpaqueAddrs = errors.New("cannot write nil OpaqueAddrs")
37
38	// ErrNilDNSAddress is returned when the supplied address is nil.
39	ErrNilDNSAddress = errors.New("cannot write nil DNS address")
40
41	// ErrNilPublicKey is returned when a nil pubkey is used.
42	ErrNilPublicKey = errors.New("cannot write nil pubkey")
43
44	// ErrUnknownServiceLength is returned when the onion service length is
45	// unknown.
46	ErrUnknownServiceLength = errors.New("unknown onion service length")
47	)
48
49	// ErrOutpointIndexTooBig is used when the outpoint index exceeds the max value
50	// of uint16.
51	func ErrOutpointIndexTooBig(index uint32) error {	3✔
52	return fmt.Errorf(	3✔
53	"index for outpoint (%v) is greater than "+	3✔
54	"max index of %v", index, math.MaxUint16,	3✔
55	)	3✔
56	}	3✔
57
58	// WriteBytes appends the given bytes to the provided buffer.
59	func WriteBytes(buf *bytes.Buffer, b []byte) error {	66,058✔
60	_, err := buf.Write(b)	66,058✔
61	return err	66,058✔
62	}	66,058✔
63
64	// WriteUint8 appends the uint8 to the provided buffer.
65	func WriteUint8(buf *bytes.Buffer, n uint8) error {	3,438✔
66	_, err := buf.Write([]byte{n})	3,438✔
67	return err	3,438✔
68	}	3,438✔
69
70	// WriteUint16 appends the uint16 to the provided buffer. It encodes the
71	// integer using big endian byte order.
72	func WriteUint16(buf *bytes.Buffer, n uint16) error {	15,772✔
73	var b [2]byte	15,772✔
74	binary.BigEndian.PutUint16(b[:], n)	15,772✔
75	_, err := buf.Write(b[:])	15,772✔
76	return err	15,772✔
77	}	15,772✔
78
79	// WriteUint32 appends the uint32 to the provided buffer. It encodes the
80	// integer using big endian byte order.
81	func WriteUint32(buf *bytes.Buffer, n uint32) error {	8,177✔
82	var b [4]byte	8,177✔
83	binary.BigEndian.PutUint32(b[:], n)	8,177✔
84	_, err := buf.Write(b[:])	8,177✔
85	return err	8,177✔
86	}	8,177✔
87
88	// WriteUint64 appends the uint64 to the provided buffer. It encodes the
89	// integer using big endian byte order.
90	func WriteUint64(buf *bytes.Buffer, n uint64) error {	12,204✔
91	var b [8]byte	12,204✔
92	binary.BigEndian.PutUint64(b[:], n)	12,204✔
93	_, err := buf.Write(b[:])	12,204✔
94	return err	12,204✔
95	}	12,204✔
96
97	// WriteSatoshi appends the Satoshi value to the provided buffer.
98	func WriteSatoshi(buf *bytes.Buffer, amount btcutil.Amount) error {	1,027✔
99	return WriteUint64(buf, uint64(amount))	1,027✔
100	}	1,027✔
101
102	// WriteMilliSatoshi appends the MilliSatoshi value to the provided buffer.
103	func WriteMilliSatoshi(buf *bytes.Buffer, amount MilliSatoshi) error {	5,021✔
104	return WriteUint64(buf, uint64(amount))	5,021✔
105	}	5,021✔
106
107	// WritePublicKey appends the compressed public key to the provided buffer.
108	func WritePublicKey(buf bytes.Buffer, pub btcec.PublicKey) error {	2,037✔
109	if pub == nil {	2,038✔
110	return ErrNilPublicKey	1✔
111	}	1✔
112
113	serializedPubkey := pub.SerializeCompressed()	2,036✔
114	return WriteBytes(buf, serializedPubkey)	2,036✔
115	}
116
117	// WriteChannelID appends the ChannelID to the provided buffer.
118	func WriteChannelID(buf *bytes.Buffer, channelID ChannelID) error {	12,319✔
119	return WriteBytes(buf, channelID[:])	12,319✔
120	}	12,319✔
121
122	// WriteNodeAlias appends the alias to the provided buffer.
123	func WriteNodeAlias(buf *bytes.Buffer, alias NodeAlias) error {	270✔
124	return WriteBytes(buf, alias[:])	270✔
125	}	270✔
126
127	// WriteShortChannelID appends the ShortChannelID to the provided buffer. It
128	// encodes the BlockHeight and TxIndex each using 3 bytes with big endian byte
129	// order, and encodes txPosition using 2 bytes with big endian byte order.
130	func WriteShortChannelID(buf *bytes.Buffer, shortChanID ShortChannelID) error {	6,693✔
131	// Check that field fit in 3 bytes and write the blockHeight	6,693✔
132	if shortChanID.BlockHeight > ((1 << 24) - 1) {	6,693✔
133	return errors.New("block height should fit in 3 bytes")	×
134	}	×
135
136	var blockHeight [4]byte	6,693✔
137	binary.BigEndian.PutUint32(blockHeight[:], shortChanID.BlockHeight)	6,693✔
138		6,693✔
139	if _, err := buf.Write(blockHeight[1:]); err != nil {	6,693✔
140	return err	×
141	}	×
142
143	// Check that field fit in 3 bytes and write the txIndex
144	if shortChanID.TxIndex > ((1 << 24) - 1) {	6,693✔
145	return errors.New("tx index should fit in 3 bytes")	×
146	}	×
147
148	var txIndex [4]byte	6,693✔
149	binary.BigEndian.PutUint32(txIndex[:], shortChanID.TxIndex)	6,693✔
150	if _, err := buf.Write(txIndex[1:]); err != nil {	6,693✔
151	return err	×
152	}	×
153
154	// Write the TxPosition
155	return WriteUint16(buf, shortChanID.TxPosition)	6,693✔
156	}
157
158	// WriteSig appends the signature to the provided buffer.
159	func WriteSig(buf *bytes.Buffer, sig Sig) error {	15,332✔
160	return WriteBytes(buf, sig.bytes[:])	15,332✔
161	}	15,332✔
162
163	// WriteSigs appends the slice of signatures to the provided buffer with its
164	// length.
165	func WriteSigs(buf *bytes.Buffer, sigs []Sig) error {	4,427✔
166	// Write the length of the sigs.	4,427✔
167	if err := WriteUint16(buf, uint16(len(sigs))); err != nil {	4,427✔
168	return err	×
169	}	×
170
171	for _, sig := range sigs {	13,614✔
172	if err := WriteSig(buf, sig); err != nil {	9,187✔
173	return err	×
174	}	×
175	}
176	return nil	4,427✔
177	}
178
179	// WriteFailCode appends the FailCode to the provided buffer.
180	func WriteFailCode(buf *bytes.Buffer, e FailCode) error {	122✔
181	return WriteUint16(buf, uint16(e))	122✔
182	}	122✔
183
184	// WriteRawFeatureVector encodes the feature using the feature's Encode method
185	// and appends the data to the provided buffer. An error will return if the
186	// passed feature is nil.
187	func WriteRawFeatureVector(buf bytes.Buffer, feature RawFeatureVector) error {	1,990✔
188	if feature == nil {	1,992✔
189	return ErrNilFeatureVector	2✔
190	}	2✔
191
192	return feature.Encode(buf)	1,988✔
193	}
194
195	// WriteColorRGBA appends the RGBA color using three bytes.
196	func WriteColorRGBA(buf *bytes.Buffer, e color.RGBA) error {	270✔
197	// Write R	270✔
198	if err := WriteUint8(buf, e.R); err != nil {	270✔
199	return err	×
200	}	×
201
202	// Write G
203	if err := WriteUint8(buf, e.G); err != nil {	270✔
204	return err	×
205	}	×
206
207	// Write B
208	return WriteUint8(buf, e.B)	270✔
209	}
210
211	// WriteQueryEncoding appends the QueryEncoding to the provided buffer.
212	func WriteQueryEncoding(buf *bytes.Buffer, e QueryEncoding) error {	947✔
213	return WriteUint8(buf, uint8(e))	947✔
214	}	947✔
215
216	// WriteFundingFlag appends the FundingFlag to the provided buffer.
217	func WriteFundingFlag(buf *bytes.Buffer, flag FundingFlag) error {	149✔
218	return WriteUint8(buf, uint8(flag))	149✔
219	}	149✔
220
221	// WriteChanUpdateMsgFlags appends the update flag to the provided buffer.
222	func WriteChanUpdateMsgFlags(buf *bytes.Buffer, f ChanUpdateMsgFlags) error {	480✔
223	return WriteUint8(buf, uint8(f))	480✔
224	}	480✔
225
226	// WriteChanUpdateChanFlags appends the update flag to the provided buffer.
227	func WriteChanUpdateChanFlags(buf *bytes.Buffer, f ChanUpdateChanFlags) error {	480✔
228	return WriteUint8(buf, uint8(f))	480✔
229	}	480✔
230
231	// WriteDeliveryAddress appends the address to the provided buffer.
232	func WriteDeliveryAddress(buf *bytes.Buffer, addr DeliveryAddress) error {	523✔
233	return writeDataWithLength(buf, addr)	523✔
234	}	523✔
235
236	// WritePingPayload appends the payload to the provided buffer.
237	func WritePingPayload(buf *bytes.Buffer, payload PingPayload) error {	106✔
238	return writeDataWithLength(buf, payload)	106✔
239	}	106✔
240
241	// WritePongPayload appends the payload to the provided buffer.
242	func WritePongPayload(buf *bytes.Buffer, payload PongPayload) error {	108✔
243	return writeDataWithLength(buf, payload)	108✔
244	}	108✔
245
246	// WriteWarningData appends the data to the provided buffer.
247	func WriteWarningData(buf *bytes.Buffer, data WarningData) error {	122✔
248	return writeDataWithLength(buf, data)	122✔
249	}	122✔
250
251	// WriteErrorData appends the data to the provided buffer.
252	func WriteErrorData(buf *bytes.Buffer, data ErrorData) error {	111✔
253	return writeDataWithLength(buf, data)	111✔
254	}	111✔
255
256	// WriteOpaqueReason appends the reason to the provided buffer.
257	func WriteOpaqueReason(buf *bytes.Buffer, reason OpaqueReason) error {	796✔
258	return writeDataWithLength(buf, reason)	796✔
259	}	796✔
260
261	// WriteBool appends the boolean to the provided buffer.
262	func WriteBool(buf *bytes.Buffer, b bool) error {	128✔
263	if b {	177✔
264	return WriteBytes(buf, []byte{1})	49✔
265	}	49✔
266	return WriteBytes(buf, []byte{0})	82✔
267	}
268
269	// WritePkScript appends the script to the provided buffer. Returns an error if
270	// the provided script exceeds 34 bytes.
271	func WritePkScript(buf *bytes.Buffer, s PkScript) error {	2✔
272	// The largest script we'll accept is a p2wsh which is exactly	2✔
273	// 34 bytes long.	2✔
274	scriptLength := len(s)	2✔
275	if scriptLength > 34 {	3✔
276	return ErrPkScriptTooLong	1✔
277	}	1✔
278
279	return wire.WriteVarBytes(buf, 0, s)	1✔
280	}
281
282	// WriteOutPoint appends the outpoint to the provided buffer.
283	func WriteOutPoint(buf *bytes.Buffer, p wire.OutPoint) error {	126✔
284	// Before we write anything to the buffer, check the Index is sane.	126✔
285	if p.Index > math.MaxUint16 {	128✔
286	return ErrOutpointIndexTooBig(p.Index)	2✔
287	}	2✔
288
289	var h [32]byte	124✔
290	copy(h[:], p.Hash[:])	124✔
291	if _, err := buf.Write(h[:]); err != nil {	124✔
292	return err	×
293	}	×
294
295	// Write the index using two bytes.
296	return WriteUint16(buf, uint16(p.Index))	124✔
297	}
298
299	// WriteTCPAddr appends the TCP address to the provided buffer, either a IPv4
300	// or a IPv6.
301	func WriteTCPAddr(buf bytes.Buffer, addr net.TCPAddr) error {	1,426✔
302	if addr == nil {	1,427✔
303	return ErrNilTCPAddress	1✔
304	}	1✔
305
306	// Make a slice of bytes to hold the data of descriptor and ip. At
307	// most, we need 17 bytes - 1 byte for the descriptor, 16 bytes for
308	// IPv6.
309	data := make([]byte, 0, 17)	1,425✔
310		1,425✔
311	if addr.IP.To4() != nil {	2,499✔
312	data = append(data, uint8(tcp4Addr))	1,074✔
313	data = append(data, addr.IP.To4()...)	1,074✔
314	} else {	1,428✔
315	data = append(data, uint8(tcp6Addr))	354✔
316	data = append(data, addr.IP.To16()...)	354✔
317	}	354✔
318
319	if _, err := buf.Write(data); err != nil {	1,425✔
320	return err	×
321	}	×
322
323	return WriteUint16(buf, uint16(addr.Port))	1,425✔
324	}
325
326	// WriteOnionAddr appends the onion address to the provided buffer.
327	func WriteOnionAddr(buf bytes.Buffer, addr tor.OnionAddr) error {	303✔
328	if addr == nil {	304✔
329	return ErrNilOnionAddress	1✔
330	}	1✔
331
332	var (	302✔
333	suffixIndex int	302✔
334	descriptor []byte	302✔
335	)	302✔
336		302✔
337	// Decide the suffixIndex and descriptor.	302✔
338	switch len(addr.OnionService) {	302✔
339	case tor.V2Len:	294✔
340	descriptor = []byte{byte(v2OnionAddr)}	294✔
341	suffixIndex = tor.V2Len - tor.OnionSuffixLen	294✔
342
343	case tor.V3Len:	10✔
344	descriptor = []byte{byte(v3OnionAddr)}	10✔
345	suffixIndex = tor.V3Len - tor.OnionSuffixLen	10✔
346
347	default:	1✔
348	return ErrUnknownServiceLength	1✔
349	}
350
351	// Decode the address.
352	host, err := tor.Base32Encoding.DecodeString(	301✔
353	addr.OnionService[:suffixIndex],	301✔
354	)	301✔
355	if err != nil {	302✔
356	return err	1✔
357	}	1✔
358
359	// Perform the actual write when the above checks passed.
360	if _, err := buf.Write(descriptor); err != nil {	300✔
361	return err	×
362	}	×
363	if _, err := buf.Write(host); err != nil {	300✔
364	return err	×
365	}	×
366
367	return WriteUint16(buf, uint16(addr.Port))	300✔
368	}
369
370	// WriteDNSAddress appends the DNS address to the provided buffer.
371	func WriteDNSAddress(buf bytes.Buffer, addr DNSAddress) error {	37✔
372	if addr == nil {	37✔
NEW 373	return ErrNilDNSAddress	×
NEW 374	}	×
375
376	// Write the descriptor, the hostname length, and the hostname.
377	if _, err := buf.Write([]byte{byte(dnsAddr)}); err != nil {	37✔
NEW 378	return err	×
NEW 379	}	×
380
381	if err := WriteUint8(buf, uint8(len(addr.Hostname))); err != nil {	37✔
NEW 382	return err	×
NEW 383	}	×
384
385	if _, err := buf.WriteString(addr.Hostname); err != nil {	37✔
NEW 386	return err	×
NEW 387	}	×
388
389	return WriteUint16(buf, addr.Port)	37✔
390	}
391
392	// WriteOpaqueAddrs appends the payload of the given OpaqueAddrs to buffer.
393	func WriteOpaqueAddrs(buf bytes.Buffer, addr OpaqueAddrs) error {	140✔
394	if addr == nil {	140✔
395	return ErrNilOpaqueAddrs	×
396	}	×
397
398	_, err := buf.Write(addr.Payload)	140✔
399	return err	140✔
400	}
401
402	// WriteNetAddrs appends a slice of addresses to the provided buffer with the
403	// length info.
404	func WriteNetAddrs(buf *bytes.Buffer, addresses []net.Addr) error {	273✔
405	// First, we'll encode all the addresses into an intermediate	273✔
406	// buffer. We need to do this in order to compute the total	273✔
407	// length of the addresses.	273✔
408	buffer := make([]byte, 0, MaxMsgBody)	273✔
409	addrBuf := bytes.NewBuffer(buffer)	273✔
410		273✔
411	for _, address := range addresses {	1,989✔
412	switch a := address.(type) {	1,716✔
413	case *net.TCPAddr:	1,351✔
414	if err := WriteTCPAddr(addrBuf, a); err != nil {	1,351✔
415	return err	×
416	}	×
417	case *tor.OnionAddr:	262✔
418	if err := WriteOnionAddr(addrBuf, a); err != nil {	262✔
419	return err	×
420	}	×
421	case *OpaqueAddrs:	104✔
422	if err := WriteOpaqueAddrs(addrBuf, a); err != nil {	104✔
423	return err	×
424	}	×
425	case *DNSAddress:	1✔
426	if err := WriteDNSAddress(addrBuf, a); err != nil {	1✔
NEW 427	return err	×
NEW 428	}	×
429	default:	1✔
430	return ErrNilNetAddress	1✔
431	}
432	}
433
434	// With the addresses fully encoded, we can now write out data.
435	return writeDataWithLength(buf, addrBuf.Bytes())	272✔
436	}
437
438	// writeDataWithLength writes the data and its length to the buffer.
439	func writeDataWithLength(buf *bytes.Buffer, data []byte) error {	2,029✔
440	var l [2]byte	2,029✔
441	binary.BigEndian.PutUint16(l[:], uint16(len(data)))	2,029✔
442	if _, err := buf.Write(l[:]); err != nil {	2,029✔
443	return err	×
444	}	×
445
446	_, err := buf.Write(data)	2,029✔
447	return err	2,029✔
448	}

lightningnetwork / lnd / 16990665124

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