14277115115

Committed 05 Apr 2025 01:43AM UTC coverage: 58.056% (-11.0%) from 69.04%

Build # 14277115115

Build Type

Pull #9670

github

Committed by

web-flow

Commit Message

Merge a7e89c130 into f0ea5bf3b

Pull Request Pull Request #9670: build: bump version to v0.19.0 rc2

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67.22

/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")

        // 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))
}

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

lightningnetwork / lnd / 14277115115

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