forked from rubblelabs/ripple
/
format.go
432 lines (406 loc) · 12.3 KB
/
format.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
package data
import (
"encoding/binary"
"fmt"
"io"
"strings"
)
type NodeType uint8
type NodeFormat uint8
type HashPrefix uint32
type LedgerNamespace uint16
const (
// Hash Prefixes
HP_TRANSACTION_ID HashPrefix = 0x54584E00 // 'TXN' transaction
HP_TRANSACTION_NODE HashPrefix = 0x534E4400 // 'SND' transaction plus metadata (probably should have been TND!)
HP_LEAF_NODE HashPrefix = 0x4D4C4E00 // 'MLN' account state
HP_INNER_NODE HashPrefix = 0x4D494E00 // 'MIN' inner node in tree
HP_LEDGER_MASTER HashPrefix = 0x4C575200 // 'LWR' ledger master data for signing (probably should have been LGR!)
HP_TRANSACTION_SIGN HashPrefix = 0x53545800 // 'STX' inner transaction to sign
HP_VALIDATION HashPrefix = 0x56414C00 // 'VAL' validation for signing
HP_PROPOSAL HashPrefix = 0x50525000 // 'PRP' proposal for signing
// Node Types
NT_UNKNOWN NodeType = 0
NT_LEDGER NodeType = 1
NT_TRANSACTION NodeType = 2
NT_ACCOUNT_NODE NodeType = 3
NT_TRANSACTION_NODE NodeType = 4
// Node Formats
NF_PREFIX NodeFormat = 1
NF_HASH NodeFormat = 2
NF_WIRE NodeFormat = 3
// Ledger index NameSpaces
NS_ACCOUNT LedgerNamespace = 'a'
NS_DIRECTORY_NODE LedgerNamespace = 'd'
NS_RIPPLE_STATE LedgerNamespace = 'r'
NS_OFFER LedgerNamespace = 'o' // Entry for an offer
NS_OWNER_DIRECTORY LedgerNamespace = 'O' // Directory of things owned by an account
NS_BOOK_DIRECTORY LedgerNamespace = 'B' // Directory of order books
NS_SKIP_LIST LedgerNamespace = 's'
NS_AMENDMENT LedgerNamespace = 'f'
NS_FEE LedgerNamespace = 'e'
NS_SUSPAY LedgerNamespace = 'u'
NS_TICKET LedgerNamespace = 'T'
NS_SIGNER_LIST LedgerNamespace = 'S'
NS_XRPU_CHANNEL LedgerNamespace = 'x'
NS_CHECK LedgerNamespace = 'C'
NS_DEPOSIT_PREAUTH LedgerNamespace = 'p'
NS_NEGATIVE_UNL LedgerNamespace = 'N'
)
var nodeTypes = [...]string{
NT_UNKNOWN: "Unknown",
NT_LEDGER: "Ledger",
NT_TRANSACTION: "Transaction",
NT_ACCOUNT_NODE: "Account Node",
NT_TRANSACTION_NODE: "Transaction Node",
}
type NodeHeader struct {
LedgerSequence uint32
_ uint32 //padding for repeated LedgerIndex
NodeType NodeType
}
type enc struct {
typ, field uint8
}
const (
ST_UINT16 uint8 = 1
ST_UINT32 uint8 = 2
ST_UINT64 uint8 = 3
ST_HASH128 uint8 = 4
ST_HASH256 uint8 = 5
ST_AMOUNT uint8 = 6
ST_VL uint8 = 7
ST_ACCOUNT uint8 = 8
ST_OBJECT uint8 = 14
ST_ARRAY uint8 = 15
ST_UINT8 uint8 = 16
ST_HASH160 uint8 = 17
ST_PATHSET uint8 = 18
ST_VECTOR256 uint8 = 19
)
// See rippled's SField.cpp for the strings and corresponding encoding values.
var encodings = map[enc]string{
// 16-bit unsigned integers (common)
enc{ST_UINT16, 1}: "LedgerEntryType",
enc{ST_UINT16, 2}: "TransactionType",
enc{ST_UINT16, 3}: "SignerWeight",
enc{ST_UINT16, 4}: "TransferFee",
// 16-bit unsigned integers (uncommon)
enc{ST_UINT16, 16}: "Version",
// 32-bit unsigned integers (common)
enc{ST_UINT32, 2}: "Flags",
enc{ST_UINT32, 3}: "SourceTag",
enc{ST_UINT32, 4}: "Sequence",
enc{ST_UINT32, 5}: "PreviousTxnLgrSeq",
enc{ST_UINT32, 6}: "LedgerSequence",
enc{ST_UINT32, 7}: "CloseTime",
enc{ST_UINT32, 8}: "ParentCloseTime",
enc{ST_UINT32, 9}: "SigningTime",
enc{ST_UINT32, 10}: "Expiration",
enc{ST_UINT32, 11}: "TransferRate",
enc{ST_UINT32, 12}: "WalletSize",
enc{ST_UINT32, 13}: "OwnerCount",
enc{ST_UINT32, 14}: "DestinationTag",
// 32-bit unsigned integers (uncommon)
enc{ST_UINT32, 16}: "HighQualityIn",
enc{ST_UINT32, 17}: "HighQualityOut",
enc{ST_UINT32, 18}: "LowQualityIn",
enc{ST_UINT32, 19}: "LowQualityOut",
enc{ST_UINT32, 20}: "QualityIn",
enc{ST_UINT32, 21}: "QualityOut",
enc{ST_UINT32, 22}: "StampEscrow",
enc{ST_UINT32, 23}: "BondAmount",
enc{ST_UINT32, 24}: "LoadFee",
enc{ST_UINT32, 25}: "OfferSequence",
enc{ST_UINT32, 26}: "FirstLedgerSequence",
enc{ST_UINT32, 27}: "LastLedgerSequence",
enc{ST_UINT32, 28}: "TransactionIndex",
enc{ST_UINT32, 29}: "OperationLimit",
enc{ST_UINT32, 30}: "ReferenceFeeUnits",
enc{ST_UINT32, 31}: "ReserveBase",
enc{ST_UINT32, 32}: "ReserveIncrement",
enc{ST_UINT32, 33}: "SetFlag",
enc{ST_UINT32, 34}: "ClearFlag",
enc{ST_UINT32, 35}: "SignerQuorum",
enc{ST_UINT32, 36}: "CancelAfter",
enc{ST_UINT32, 37}: "FinishAfter",
enc{ST_UINT32, 38}: "SignerListID",
enc{ST_UINT32, 39}: "SettleDelay",
enc{ST_UINT32, 40}: "TicketCount",
enc{ST_UINT32, 41}: "TicketSequence",
enc{ST_UINT32, 42}: "NFTokenTaxon",
enc{ST_UINT32, 43}: "MintedNFTokens",
enc{ST_UINT32, 44}: "BurnedNFTokens",
// 64-bit unsigned integers (common)
enc{ST_UINT64, 1}: "IndexNext",
enc{ST_UINT64, 2}: "IndexPrevious",
enc{ST_UINT64, 3}: "BookNode",
enc{ST_UINT64, 4}: "OwnerNode",
enc{ST_UINT64, 5}: "BaseFee",
enc{ST_UINT64, 6}: "ExchangeRate",
enc{ST_UINT64, 7}: "LowNode",
enc{ST_UINT64, 8}: "HighNode",
enc{ST_UINT64, 9}: "DestinationNode",
enc{ST_UINT64, 10}: "Cookie",
enc{ST_UINT64, 11}: "ServerVersion",
enc{ST_UINT64, 12}: "NFTokenOfferNode",
// 128-bit (common)
enc{ST_HASH128, 1}: "EmailHash",
// 256-bit (common)
enc{ST_HASH256, 1}: "LedgerHash",
enc{ST_HASH256, 2}: "ParentHash",
enc{ST_HASH256, 3}: "TransactionHash",
enc{ST_HASH256, 4}: "AccountHash",
enc{ST_HASH256, 5}: "PreviousTxnID",
enc{ST_HASH256, 6}: "LedgerIndex",
enc{ST_HASH256, 7}: "WalletLocator",
enc{ST_HASH256, 8}: "RootIndex",
enc{ST_HASH256, 9}: "AccountTxnID",
enc{ST_HASH256, 10}: "NFTokenID",
// 256-bit (uncommon)
enc{ST_HASH256, 16}: "BookDirectory",
enc{ST_HASH256, 17}: "InvoiceID",
enc{ST_HASH256, 18}: "Nickname",
enc{ST_HASH256, 19}: "Amendment",
enc{ST_HASH256, 20}: "TicketID",
enc{ST_HASH256, 21}: "Digest",
enc{ST_HASH256, 22}: "Channel",
enc{ST_HASH256, 24}: "CheckID",
enc{ST_HASH256, 25}: "ValidatedHash",
enc{ST_HASH256, 26}: "PreviousPageMin",
enc{ST_HASH256, 27}: "NextPageMin",
enc{ST_HASH256, 28}: "NFTokenBuyOffer",
enc{ST_HASH256, 29}: "NFTokenSellOffer",
// currency amount (common)
enc{ST_AMOUNT, 1}: "Amount",
enc{ST_AMOUNT, 2}: "Balance",
enc{ST_AMOUNT, 3}: "LimitAmount",
enc{ST_AMOUNT, 4}: "TakerPays",
enc{ST_AMOUNT, 5}: "TakerGets",
enc{ST_AMOUNT, 6}: "LowLimit",
enc{ST_AMOUNT, 7}: "HighLimit",
enc{ST_AMOUNT, 8}: "Fee",
enc{ST_AMOUNT, 9}: "SendMax",
enc{ST_AMOUNT, 10}: "DeliverMin",
// currency amount (uncommon)
enc{ST_AMOUNT, 16}: "MinimumOffer",
enc{ST_AMOUNT, 17}: "RippleEscrow",
enc{ST_AMOUNT, 18}: "DeliveredAmount",
enc{ST_AMOUNT, 19}: "NFTokenBrokerFee",
// variable length (common)
enc{ST_VL, 1}: "PublicKey",
enc{ST_VL, 2}: "MessageKey",
enc{ST_VL, 3}: "SigningPubKey",
enc{ST_VL, 4}: "TxnSignature",
enc{ST_VL, 5}: "URI",
enc{ST_VL, 6}: "Signature",
enc{ST_VL, 7}: "Domain",
enc{ST_VL, 8}: "FundCode",
enc{ST_VL, 9}: "RemoveCode",
enc{ST_VL, 10}: "ExpireCode",
enc{ST_VL, 11}: "CreateCode",
enc{ST_VL, 12}: "MemoType",
enc{ST_VL, 13}: "MemoData",
enc{ST_VL, 14}: "MemoFormat",
// variable length (uncommon)
enc{ST_VL, 16}: "Fulfillment",
enc{ST_VL, 17}: "Condition",
enc{ST_VL, 18}: "MasterSignature",
enc{ST_VL, 19}: "UNLModifyValidator",
enc{ST_VL, 20}: "ValidatorToDisable",
enc{ST_VL, 21}: "ValidatorToReEnable",
// account
enc{ST_ACCOUNT, 1}: "Account",
enc{ST_ACCOUNT, 2}: "Owner",
enc{ST_ACCOUNT, 3}: "Destination",
enc{ST_ACCOUNT, 4}: "Issuer",
enc{ST_ACCOUNT, 5}: "Authorize",
enc{ST_ACCOUNT, 6}: "Unauthorize",
enc{ST_ACCOUNT, 7}: "Target",
enc{ST_ACCOUNT, 8}: "RegularKey",
enc{ST_ACCOUNT, 9}: "NFTokenMinter",
// inner object
enc{ST_OBJECT, 1}: "EndOfObject",
enc{ST_OBJECT, 2}: "TransactionMetaData",
enc{ST_OBJECT, 3}: "CreatedNode",
enc{ST_OBJECT, 4}: "DeletedNode",
enc{ST_OBJECT, 5}: "ModifiedNode",
enc{ST_OBJECT, 6}: "PreviousFields",
enc{ST_OBJECT, 7}: "FinalFields",
enc{ST_OBJECT, 8}: "NewFields",
enc{ST_OBJECT, 9}: "TemplateEntry",
enc{ST_OBJECT, 10}: "Memo",
enc{ST_OBJECT, 11}: "SignerEntry",
// inner object (uncommon)
enc{ST_OBJECT, 16}: "Signer",
enc{ST_OBJECT, 18}: "Majority",
enc{ST_OBJECT, 19}: "DisabledValidator",
// array of objects
enc{ST_ARRAY, 1}: "EndOfArray",
enc{ST_ARRAY, 2}: "SigningAccounts",
enc{ST_ARRAY, 3}: "Signers",
enc{ST_ARRAY, 4}: "SignerEntries",
enc{ST_ARRAY, 5}: "Template",
enc{ST_ARRAY, 6}: "Necessary",
enc{ST_ARRAY, 7}: "Sufficient",
enc{ST_ARRAY, 8}: "AffectedNodes",
enc{ST_ARRAY, 9}: "Memos",
enc{ST_ARRAY, 10}: "NFTokens",
// array of objects (uncommon)
enc{ST_ARRAY, 16}: "Majorities",
enc{ST_ARRAY, 17}: "DisabledValidators",
// 8-bit unsigned integers (common)
enc{ST_UINT8, 1}: "CloseResolution",
enc{ST_UINT8, 2}: "Method",
enc{ST_UINT8, 3}: "TransactionResult",
// 8-bit unsigned integers (uncommon)
enc{ST_UINT8, 16}: "TickSize",
enc{ST_UINT8, 17}: "UNLModifyDisabling",
// 160-bit (common)
enc{ST_HASH160, 1}: "TakerPaysCurrency",
enc{ST_HASH160, 2}: "TakerPaysIssuer",
enc{ST_HASH160, 3}: "TakerGetsCurrency",
enc{ST_HASH160, 4}: "TakerGetsIssuer",
// path set
enc{ST_PATHSET, 1}: "Paths",
// vector of 256-bit
enc{ST_VECTOR256, 1}: "Indexes",
enc{ST_VECTOR256, 2}: "Hashes",
enc{ST_VECTOR256, 3}: "Amendments",
enc{ST_VECTOR256, 4}: "NFTokenOffers",
}
var reverseEncodings map[string]enc
var signingFields map[enc]struct{}
func init() {
reverseEncodings = make(map[string]enc)
signingFields = make(map[enc]struct{})
for e, name := range encodings {
reverseEncodings[name] = e
if strings.Contains(name, "Signature") {
signingFields[e] = struct{}{}
}
}
}
func (h HashPrefix) String() string {
return string(h.Bytes())
}
func (h HashPrefix) Bytes() []byte {
b := make([]byte, 4)
binary.BigEndian.PutUint32(b, uint32(h))
return b
}
func (n NodeType) String() string {
return nodeTypes[n]
}
func (e enc) Priority() uint32 {
return uint32(e.typ)<<16 | uint32(e.field)
}
func (e enc) SigningField() bool {
_, ok := signingFields[e]
return ok
}
func readEncoding(r Reader) (*enc, error) {
var e enc
if b, err := r.ReadByte(); err != nil {
return nil, err
} else {
e.typ = b >> 4
e.field = b & 0xF
}
var err error
if e.typ == 0 {
if e.typ, err = r.ReadByte(); err != nil {
return nil, err
}
}
if e.field == 0 {
if e.field, err = r.ReadByte(); err != nil {
return nil, err
}
}
return &e, nil
}
func writeEncoding(w io.Writer, e enc) error {
var err error
switch {
case e.typ < 16 && e.field < 16:
_, err = w.Write([]uint8{e.typ<<4 | e.field})
case e.typ < 16:
_, err = w.Write([]uint8{e.typ << 4, e.field})
case e.field < 16:
_, err = w.Write([]uint8{e.field, e.typ})
default:
_, err = w.Write([]uint8{0, e.typ, e.field})
}
return err
}
func write(w io.Writer, v interface{}) error {
return binary.Write(w, binary.BigEndian, v)
}
func writeValues(w io.Writer, values []interface{}) error {
for _, v := range values {
if err := binary.Write(w, binary.BigEndian, v); err != nil {
return err
}
}
return nil
}
func read(r Reader, dest interface{}) error {
return binary.Read(r, binary.BigEndian, dest)
}
func writeVariableLength(w io.Writer, b []byte) error {
n := len(b)
var err error
switch {
case n < 0 || n > 918744:
return fmt.Errorf("Unsupported Variable Length encoding: %d", n)
case n <= 192:
_, err = w.Write([]uint8{uint8(n)})
case n <= 12480:
n -= 193
_, err = w.Write([]uint8{193 + uint8(n>>8), uint8(n)})
case n <= 918744:
n -= 12481
_, err = w.Write([]uint8{241 + uint8(n>>16), uint8(n >> 8), uint8(n)})
}
if err != nil {
return err
}
_, err = w.Write(b)
return err
}
func readVariableLength(r Reader) (int, error) {
var first, second, third byte
var err error
if first, err = r.ReadByte(); err != nil {
return 0, err
}
switch {
case first <= 192:
return int(first), nil
case first <= 240:
if second, err = r.ReadByte(); err != nil {
return 0, nil
}
return 193 + int(first-193)*256 + int(second), nil
case first <= 254:
if second, err = r.ReadByte(); err != nil {
return 0, nil
}
if third, err = r.ReadByte(); err != nil {
return 0, nil
}
return 12481 + int(first-241)*65536 + int(second)*256 + int(third), nil
}
return 0, fmt.Errorf("Unsupported Variable Length encoding")
}
func unmarshalSlice(s []byte, r Reader, prefix string) error {
n, err := r.Read(s)
if n != len(s) {
return fmt.Errorf("%s: short read: %d expected: %d", prefix, n, len(s))
}
if err != nil {
return fmt.Errorf("%s: %s", prefix, err.Error())
}
return nil
}