15838907453

Committed 24 Jun 2025 01:26AM UTC coverage: 57.079% (-11.1%) from 68.172%

Build # 15838907453

Build Type

Pull #9982

github

Committed by

web-flow

Commit Message

Merge e42780be2 into 45c15646c

Pull Request Pull Request #9982: lnwire+lnwallet: add LocalNonces field for splice nonce coordination w/ taproot channels

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80.89

/lnwire/custom_records.go

package lnwire

import (
        "bytes"
        "fmt"
        "io"
        "maps"
        "sort"

        "github.com/lightningnetwork/lnd/fn/v2"
        "github.com/lightningnetwork/lnd/tlv"
)

const (
        // MinCustomRecordsTlvType is the minimum custom records TLV type as
        // defined in BOLT 01.
        MinCustomRecordsTlvType = 65536
)

// CustomRecords stores a set of custom key/value pairs. Map keys are TLV types
// which must be greater than or equal to MinCustomRecordsTlvType.
type CustomRecords map[uint64][]byte

// NewCustomRecords creates a new CustomRecords instance from a
// tlv.TypeMap.
func NewCustomRecords(tlvMap tlv.TypeMap) (CustomRecords, error) {
        // Make comparisons in unit tests easy by returning nil if the map is
        // empty.
        if len(tlvMap) == 0 {
                return nil, nil
        }

        customRecords := make(CustomRecords, len(tlvMap))
        for k, v := range tlvMap {
                customRecords[uint64(k)] = v
        }

        // Validate the custom records.
        err := customRecords.Validate()
        if err != nil {
                return nil, fmt.Errorf("custom records from tlv map "+
                        "validation error: %w", err)
        }

        return customRecords, nil
}

// ParseCustomRecords creates a new CustomRecords instance from a tlv.Blob.
func ParseCustomRecords(b tlv.Blob) (CustomRecords, error) {
        return ParseCustomRecordsFrom(bytes.NewReader(b))
}

// ParseCustomRecordsFrom creates a new CustomRecords instance from a reader.
func ParseCustomRecordsFrom(r io.Reader) (CustomRecords, error) {
        typeMap, err := DecodeRecords(r)
        if err != nil {
                return nil, fmt.Errorf("error decoding HTLC record: %w", err)
        }

        return NewCustomRecords(typeMap)
}

// Validate checks that all custom records are in the custom type range.
func (c CustomRecords) Validate() error {
        if c == nil {
                return nil
        }

        for key := range c {
                if key < MinCustomRecordsTlvType {
                        return fmt.Errorf("custom records entry with TLV "+
                                "type below min: %d", MinCustomRecordsTlvType)
                }
        }

        return nil
}

// Copy returns a copy of the custom records.
func (c CustomRecords) Copy() CustomRecords {
        if c == nil {
                return nil
        }

        customRecords := make(CustomRecords, len(c))
        for k, v := range c {
                customRecords[k] = v
        }

        return customRecords
}

// MergedCopy creates a copy of the records and merges them with the given
// records. If the same key is present in both sets, the value from the other
// records will be used.
func (c CustomRecords) MergedCopy(other CustomRecords) CustomRecords {
        copiedRecords := make(CustomRecords, len(c))
        maps.Copy(copiedRecords, c)
        maps.Copy(copiedRecords, other)

        return copiedRecords
}

// ExtendRecordProducers extends the given records slice with the custom
// records. The resultant records slice will be sorted if the given records
// slice contains TLV types greater than or equal to MinCustomRecordsTlvType.
func (c CustomRecords) ExtendRecordProducers(
        producers []tlv.RecordProducer) ([]tlv.RecordProducer, error) {

        // If the custom records are nil or empty, there is nothing to do.
        if len(c) == 0 {
                return producers, nil
        }

        // Validate the custom records.
        err := c.Validate()
        if err != nil {
                return nil, err
        }

        // Ensure that the existing records slice TLV types are not also present
        // in the custom records. If they are, the resultant extended records
        // slice would erroneously contain duplicate TLV types.
        for _, rp := range producers {
                record := rp.Record()
                recordTlvType := uint64(record.Type())

                _, foundDuplicateTlvType := c[recordTlvType]
                if foundDuplicateTlvType {
                        return nil, fmt.Errorf("custom records contains a TLV "+
                                "type that is already present in the "+
                                "existing records: %d", recordTlvType)
                }
        }

        // Convert the custom records map to a TLV record producer slice and
        // append them to the exiting records slice.
        customRecordProducers := RecordsAsProducers(tlv.MapToRecords(c))
        producers = append(producers, customRecordProducers...)

        // If the records slice which was given as an argument included TLV
        // values greater than or equal to the minimum custom records TLV type
        // we will sort the extended records slice to ensure that it is ordered
        // correctly.
        SortProducers(producers)

        return producers, nil
}

// RecordProducers returns a slice of record producers for the custom records.
func (c CustomRecords) RecordProducers() []tlv.RecordProducer {
        // If the custom records are nil or empty, return an empty slice.
        if len(c) == 0 {
                return nil
        }

        // Convert the custom records map to a TLV record producer slice.
        records := tlv.MapToRecords(c)

        return RecordsAsProducers(records)
}

// Serialize serializes the custom records into a byte slice.
func (c CustomRecords) Serialize() ([]byte, error) {
        records := tlv.MapToRecords(c)
        return EncodeRecords(records)
}

// SerializeTo serializes the custom records into the given writer.
func (c CustomRecords) SerializeTo(w io.Writer) error {
        records := tlv.MapToRecords(c)
        return EncodeRecordsTo(w, records)
}

// ProduceRecordsSorted converts a slice of record producers into a slice of
// records and then sorts it by type.
func ProduceRecordsSorted(recordProducers ...tlv.RecordProducer) []tlv.Record {
        records := fn.Map(
                recordProducers,
                func(producer tlv.RecordProducer) tlv.Record {
                        return producer.Record()
                },
        )

        // Ensure that the set of records are sorted before we attempt to
        // decode from the stream, to ensure they're canonical.
        tlv.SortRecords(records)

        return records
}

// SortProducers sorts the given record producers by their type.
func SortProducers(producers []tlv.RecordProducer) {
        sort.Slice(producers, func(i, j int) bool {
                recordI := producers[i].Record()
                recordJ := producers[j].Record()
                return recordI.Type() < recordJ.Type()
        })
}

// TlvMapToRecords converts a TLV map into a slice of records.
func TlvMapToRecords(tlvMap tlv.TypeMap) []tlv.Record {
        tlvMapGeneric := make(map[uint64][]byte)
        for k, v := range tlvMap {
                tlvMapGeneric[uint64(k)] = v
        }

        return tlv.MapToRecords(tlvMapGeneric)
}

// RecordsAsProducers converts a slice of records into a slice of record
// producers.
func RecordsAsProducers(records []tlv.Record) []tlv.RecordProducer {
        return fn.Map(records, func(record tlv.Record) tlv.RecordProducer {
                return &record
        })
}

// EncodeRecords encodes the given records into a byte slice.
func EncodeRecords(records []tlv.Record) ([]byte, error) {
        var buf bytes.Buffer
        if err := EncodeRecordsTo(&buf, records); err != nil {
                return nil, err
        }

        return buf.Bytes(), nil
}

// EncodeRecordsTo encodes the given records into the given writer.
func EncodeRecordsTo(w io.Writer, records []tlv.Record) error {
        tlvStream, err := tlv.NewStream(records...)
        if err != nil {
                return err
        }

        return tlvStream.Encode(w)
}

// DecodeRecords decodes the given byte slice into the given records and returns
// the rest as a TLV type map.
func DecodeRecords(r io.Reader,
        records ...tlv.Record) (tlv.TypeMap, error) {

        tlvStream, err := tlv.NewStream(records...)
        if err != nil {
                return nil, err
        }

        return tlvStream.DecodeWithParsedTypes(r)
}

// DecodeRecordsP2P decodes the given byte slice into the given records and
// returns the rest as a TLV type map. This function is identical to
// DecodeRecords except that the record size is capped at 65535.
func DecodeRecordsP2P(r *bytes.Reader,
        records ...tlv.Record) (tlv.TypeMap, error) {

        tlvStream, err := tlv.NewStream(records...)
        if err != nil {
                return nil, err
        }

        return tlvStream.DecodeWithParsedTypesP2P(r)
}

// AssertUniqueTypes asserts that the given records have unique types.
func AssertUniqueTypes(r []tlv.Record) error {
        seen := make(fn.Set[tlv.Type], len(r))
        for _, record := range r {
                t := record.Type()
                if seen.Contains(t) {
                        return fmt.Errorf("duplicate record type: %d", t)
                }
                seen.Add(t)
        }

        return nil
}

1	package lnwire
2
3	import (
4	"bytes"
5	"fmt"
6	"io"
7	"maps"
8	"sort"
9
10	"github.com/lightningnetwork/lnd/fn/v2"
11	"github.com/lightningnetwork/lnd/tlv"
12	)
13
14	const (
15	// MinCustomRecordsTlvType is the minimum custom records TLV type as
16	// defined in BOLT 01.
17	MinCustomRecordsTlvType = 65536
18	)
19
20	// CustomRecords stores a set of custom key/value pairs. Map keys are TLV types
21	// which must be greater than or equal to MinCustomRecordsTlvType.
22	type CustomRecords map[uint64][]byte
23
24	// NewCustomRecords creates a new CustomRecords instance from a
25	// tlv.TypeMap.
26	func NewCustomRecords(tlvMap tlv.TypeMap) (CustomRecords, error) {	1✔
27	// Make comparisons in unit tests easy by returning nil if the map is	1✔
28	// empty.	1✔
29	if len(tlvMap) == 0 {	2✔
30	return nil, nil	1✔
31	}	1✔
32
33	customRecords := make(CustomRecords, len(tlvMap))	1✔
34	for k, v := range tlvMap {	2✔
35	customRecords[uint64(k)] = v	1✔
36	}	1✔
37
38	// Validate the custom records.
39	err := customRecords.Validate()	1✔
40	if err != nil {	1✔
UNCOV 41	return nil, fmt.Errorf("custom records from tlv map "+	×
UNCOV 42	"validation error: %w", err)	×
UNCOV 43	}	×
44
45	return customRecords, nil	1✔
46	}
47
48	// ParseCustomRecords creates a new CustomRecords instance from a tlv.Blob.
49	func ParseCustomRecords(b tlv.Blob) (CustomRecords, error) {	1✔
50	return ParseCustomRecordsFrom(bytes.NewReader(b))	1✔
51	}	1✔
52
53	// ParseCustomRecordsFrom creates a new CustomRecords instance from a reader.
54	func ParseCustomRecordsFrom(r io.Reader) (CustomRecords, error) {	1✔
55	typeMap, err := DecodeRecords(r)	1✔
56	if err != nil {	1✔
57	return nil, fmt.Errorf("error decoding HTLC record: %w", err)	×
58	}	×
59
60	return NewCustomRecords(typeMap)	1✔
61	}
62
63	// Validate checks that all custom records are in the custom type range.
64	func (c CustomRecords) Validate() error {	1✔
65	if c == nil {	2✔
66	return nil	1✔
67	}	1✔
68
69	for key := range c {	2✔
70	if key < MinCustomRecordsTlvType {	1✔
UNCOV 71	return fmt.Errorf("custom records entry with TLV "+	×
UNCOV 72	"type below min: %d", MinCustomRecordsTlvType)	×
UNCOV 73	}	×
74	}
75
76	return nil	1✔
77	}
78
79	// Copy returns a copy of the custom records.
80	func (c CustomRecords) Copy() CustomRecords {	1✔
81	if c == nil {	2✔
82	return nil	1✔
83	}	1✔
84
85	customRecords := make(CustomRecords, len(c))	1✔
86	for k, v := range c {	2✔
87	customRecords[k] = v	1✔
88	}	1✔
89
90	return customRecords	1✔
91	}
92
93	// MergedCopy creates a copy of the records and merges them with the given
94	// records. If the same key is present in both sets, the value from the other
95	// records will be used.
96	func (c CustomRecords) MergedCopy(other CustomRecords) CustomRecords {	1✔
97	copiedRecords := make(CustomRecords, len(c))	1✔
98	maps.Copy(copiedRecords, c)	1✔
99	maps.Copy(copiedRecords, other)	1✔
100		1✔
101	return copiedRecords	1✔
102	}	1✔
103
104	// ExtendRecordProducers extends the given records slice with the custom
105	// records. The resultant records slice will be sorted if the given records
106	// slice contains TLV types greater than or equal to MinCustomRecordsTlvType.
107	func (c CustomRecords) ExtendRecordProducers(
108	producers []tlv.RecordProducer) ([]tlv.RecordProducer, error) {	1✔
109		1✔
110	// If the custom records are nil or empty, there is nothing to do.	1✔
111	if len(c) == 0 {	2✔
112	return producers, nil	1✔
113	}	1✔
114
115	// Validate the custom records.
116	err := c.Validate()	1✔
117	if err != nil {	1✔
UNCOV 118	return nil, err	×
UNCOV 119	}	×
120
121	// Ensure that the existing records slice TLV types are not also present
122	// in the custom records. If they are, the resultant extended records
123	// slice would erroneously contain duplicate TLV types.
124	for _, rp := range producers {	2✔
125	record := rp.Record()	1✔
126	recordTlvType := uint64(record.Type())	1✔
127		1✔
128	_, foundDuplicateTlvType := c[recordTlvType]	1✔
129	if foundDuplicateTlvType {	1✔
UNCOV 130	return nil, fmt.Errorf("custom records contains a TLV "+	×
UNCOV 131	"type that is already present in the "+	×
UNCOV 132	"existing records: %d", recordTlvType)	×
UNCOV 133	}	×
134	}
135
136	// Convert the custom records map to a TLV record producer slice and
137	// append them to the exiting records slice.
138	customRecordProducers := RecordsAsProducers(tlv.MapToRecords(c))	1✔
139	producers = append(producers, customRecordProducers...)	1✔
140		1✔
141	// If the records slice which was given as an argument included TLV	1✔
142	// values greater than or equal to the minimum custom records TLV type	1✔
143	// we will sort the extended records slice to ensure that it is ordered	1✔
144	// correctly.	1✔
145	SortProducers(producers)	1✔
146		1✔
147	return producers, nil	1✔
148	}
149
150	// RecordProducers returns a slice of record producers for the custom records.
151	func (c CustomRecords) RecordProducers() []tlv.RecordProducer {	1✔
152	// If the custom records are nil or empty, return an empty slice.	1✔
153	if len(c) == 0 {	2✔
154	return nil	1✔
155	}	1✔
156
157	// Convert the custom records map to a TLV record producer slice.
158	records := tlv.MapToRecords(c)	1✔
159		1✔
160	return RecordsAsProducers(records)	1✔
161	}
162
163	// Serialize serializes the custom records into a byte slice.
164	func (c CustomRecords) Serialize() ([]byte, error) {	1✔
165	records := tlv.MapToRecords(c)	1✔
166	return EncodeRecords(records)	1✔
167	}	1✔
168
169	// SerializeTo serializes the custom records into the given writer.
170	func (c CustomRecords) SerializeTo(w io.Writer) error {	1✔
171	records := tlv.MapToRecords(c)	1✔
172	return EncodeRecordsTo(w, records)	1✔
173	}	1✔
174
175	// ProduceRecordsSorted converts a slice of record producers into a slice of
176	// records and then sorts it by type.
177	func ProduceRecordsSorted(recordProducers ...tlv.RecordProducer) []tlv.Record {	1✔
178	records := fn.Map(	1✔
179	recordProducers,	1✔
180	func(producer tlv.RecordProducer) tlv.Record {	2✔
181	return producer.Record()	1✔
182	},	1✔
183	)
184
185	// Ensure that the set of records are sorted before we attempt to
186	// decode from the stream, to ensure they're canonical.
187	tlv.SortRecords(records)	1✔
188		1✔
189	return records	1✔
190	}
191
192	// SortProducers sorts the given record producers by their type.
193	func SortProducers(producers []tlv.RecordProducer) {	1✔
194	sort.Slice(producers, func(i, j int) bool {	2✔
195	recordI := producers[i].Record()	1✔
196	recordJ := producers[j].Record()	1✔
197	return recordI.Type() < recordJ.Type()	1✔
198	})	1✔
199	}
200
201	// TlvMapToRecords converts a TLV map into a slice of records.
UNCOV 202	func TlvMapToRecords(tlvMap tlv.TypeMap) []tlv.Record {	×
UNCOV 203	tlvMapGeneric := make(map[uint64][]byte)	×
UNCOV 204	for k, v := range tlvMap {	×
UNCOV 205	tlvMapGeneric[uint64(k)] = v	×
UNCOV 206	}	×
207
UNCOV 208	return tlv.MapToRecords(tlvMapGeneric)	×
209	}
210
211	// RecordsAsProducers converts a slice of records into a slice of record
212	// producers.
213	func RecordsAsProducers(records []tlv.Record) []tlv.RecordProducer {	1✔
214	return fn.Map(records, func(record tlv.Record) tlv.RecordProducer {	2✔
215	return &record	1✔
216	})	1✔
217	}
218
219	// EncodeRecords encodes the given records into a byte slice.
220	func EncodeRecords(records []tlv.Record) ([]byte, error) {	1✔
221	var buf bytes.Buffer	1✔
222	if err := EncodeRecordsTo(&buf, records); err != nil {	1✔
223	return nil, err	×
224	}	×
225
226	return buf.Bytes(), nil	1✔
227	}
228
229	// EncodeRecordsTo encodes the given records into the given writer.
230	func EncodeRecordsTo(w io.Writer, records []tlv.Record) error {	1✔
231	tlvStream, err := tlv.NewStream(records...)	1✔
232	if err != nil {	1✔
233	return err	×
234	}	×
235
236	return tlvStream.Encode(w)	1✔
237	}
238
239	// DecodeRecords decodes the given byte slice into the given records and returns
240	// the rest as a TLV type map.
241	func DecodeRecords(r io.Reader,
242	records ...tlv.Record) (tlv.TypeMap, error) {	1✔
243		1✔
244	tlvStream, err := tlv.NewStream(records...)	1✔
245	if err != nil {	1✔
246	return nil, err	×
247	}	×
248
249	return tlvStream.DecodeWithParsedTypes(r)	1✔
250	}
251
252	// DecodeRecordsP2P decodes the given byte slice into the given records and
253	// returns the rest as a TLV type map. This function is identical to
254	// DecodeRecords except that the record size is capped at 65535.
255	func DecodeRecordsP2P(r *bytes.Reader,
256	records ...tlv.Record) (tlv.TypeMap, error) {	1✔
257		1✔
258	tlvStream, err := tlv.NewStream(records...)	1✔
259	if err != nil {	1✔
260	return nil, err	×
261	}	×
262
263	return tlvStream.DecodeWithParsedTypesP2P(r)	1✔
264	}
265
266	// AssertUniqueTypes asserts that the given records have unique types.
267	func AssertUniqueTypes(r []tlv.Record) error {	1✔
268	seen := make(fn.Set[tlv.Type], len(r))	1✔
269	for _, record := range r {	2✔
270	t := record.Type()	1✔
271	if seen.Contains(t) {	1✔
UNCOV 272	return fmt.Errorf("duplicate record type: %d", t)	×
UNCOV 273	}	×
274	seen.Add(t)	1✔
275	}
276
277	return nil	1✔
278	}

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