-
Notifications
You must be signed in to change notification settings - Fork 77
/
param.go
445 lines (411 loc) · 9.76 KB
/
param.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
433
434
435
436
437
438
439
440
441
442
443
444
445
package params
import (
"bytes"
"encoding/base64"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"math/big"
"strconv"
"strings"
"github.com/google/uuid"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/encoding/address"
"github.com/nspcc-dev/neo-go/pkg/neorpc"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/util"
)
type (
// Param represents a param either passed to
// the server or to be sent to a server using
// the client.
Param struct {
json.RawMessage
cache interface{}
}
// FuncParam represents a function argument parameter used in the
// invokefunction RPC method.
FuncParam struct {
Type smartcontract.ParamType `json:"type"`
Value Param `json:"value"`
}
)
var (
jsonNullBytes = []byte("null")
jsonFalseBytes = []byte("false")
jsonTrueBytes = []byte("true")
errMissingParameter = errors.New("parameter is missing")
errNotAString = errors.New("not a string")
errNotAnInt = errors.New("not an integer")
errNotABool = errors.New("not a boolean")
errNotAnArray = errors.New("not an array")
)
func (p Param) String() string {
str, _ := p.GetString()
return str
}
// GetStringStrict returns a string value of the parameter.
func (p *Param) GetStringStrict() (string, error) {
if p == nil {
return "", errMissingParameter
}
if p.IsNull() {
return "", errNotAString
}
if p.cache == nil {
var s string
err := json.Unmarshal(p.RawMessage, &s)
if err != nil {
return "", errNotAString
}
p.cache = s
}
if s, ok := p.cache.(string); ok {
return s, nil
}
return "", errNotAString
}
// GetString returns a string value of the parameter or tries to cast the parameter to a string value.
func (p *Param) GetString() (string, error) {
if p == nil {
return "", errMissingParameter
}
if p.IsNull() {
return "", errNotAString
}
if p.cache == nil {
var s string
err := json.Unmarshal(p.RawMessage, &s)
if err == nil {
p.cache = s
} else {
var i int64
err = json.Unmarshal(p.RawMessage, &i)
if err == nil {
p.cache = i
} else {
var b bool
err = json.Unmarshal(p.RawMessage, &b)
if err == nil {
p.cache = b
} else {
return "", errNotAString
}
}
}
}
switch t := p.cache.(type) {
case string:
return t, nil
case int64:
return strconv.FormatInt(t, 10), nil
case bool:
if t {
return "true", nil
}
return "false", nil
default:
return "", errNotAString
}
}
// GetBooleanStrict returns boolean value of the parameter.
func (p *Param) GetBooleanStrict() (bool, error) {
if p == nil {
return false, errMissingParameter
}
if bytes.Equal(p.RawMessage, jsonTrueBytes) {
p.cache = true
return true, nil
}
if bytes.Equal(p.RawMessage, jsonFalseBytes) {
p.cache = false
return false, nil
}
return false, errNotABool
}
// GetBoolean returns a boolean value of the parameter or tries to cast the parameter to a bool value.
func (p *Param) GetBoolean() (bool, error) {
if p == nil {
return false, errMissingParameter
}
if p.IsNull() {
return false, errNotABool
}
var b bool
if p.cache == nil {
err := json.Unmarshal(p.RawMessage, &b)
if err == nil {
p.cache = b
} else {
var s string
err = json.Unmarshal(p.RawMessage, &s)
if err == nil {
p.cache = s
} else {
var i int64
err = json.Unmarshal(p.RawMessage, &i)
if err == nil {
p.cache = i
} else {
return false, errNotABool
}
}
}
}
switch t := p.cache.(type) {
case bool:
return t, nil
case string:
return t != "", nil
case int64:
return t != 0, nil
default:
return false, errNotABool
}
}
// GetIntStrict returns an int value of the parameter if the parameter is an integer.
func (p *Param) GetIntStrict() (int, error) {
if p == nil {
return 0, errMissingParameter
}
if p.IsNull() {
return 0, errNotAnInt
}
value, err := p.fillIntCache()
if err != nil {
return 0, err
}
if i, ok := value.(int64); ok && i == int64(int(i)) {
return int(i), nil
}
return 0, errNotAnInt
}
func (p *Param) fillIntCache() (interface{}, error) {
if p.cache != nil {
return p.cache, nil
}
// We could also try unmarshalling to uint64, but JSON reliably supports numbers
// up to 53 bits in size.
var i int64
err := json.Unmarshal(p.RawMessage, &i)
if err == nil {
p.cache = i
return i, nil
}
var s string
err = json.Unmarshal(p.RawMessage, &s)
if err == nil {
p.cache = s
return s, nil
}
var b bool
err = json.Unmarshal(p.RawMessage, &b)
if err == nil {
p.cache = b
return b, nil
}
return nil, errNotAnInt
}
// GetInt returns an int value of the parameter or tries to cast the parameter to an int value.
func (p *Param) GetInt() (int, error) {
if p == nil {
return 0, errMissingParameter
}
if p.IsNull() {
return 0, errNotAnInt
}
value, err := p.fillIntCache()
if err != nil {
return 0, err
}
switch t := value.(type) {
case int64:
if t == int64(int(t)) {
return int(t), nil
}
return 0, errNotAnInt
case string:
return strconv.Atoi(t)
case bool:
if t {
return 1, nil
}
return 0, nil
default:
panic("unreachable")
}
}
// GetBigInt returns a big-integer value of the parameter.
func (p *Param) GetBigInt() (*big.Int, error) {
if p == nil {
return nil, errMissingParameter
}
if p.IsNull() {
return nil, errNotAnInt
}
value, err := p.fillIntCache()
if err != nil {
return nil, err
}
switch t := value.(type) {
case int64:
return big.NewInt(t), nil
case string:
bi, ok := new(big.Int).SetString(t, 10)
if !ok {
return nil, errNotAnInt
}
return bi, nil
case bool:
if t {
return big.NewInt(1), nil
}
return new(big.Int), nil
default:
panic("unreachable")
}
}
// GetArray returns a slice of Params stored in the parameter.
func (p *Param) GetArray() ([]Param, error) {
if p == nil {
return nil, errMissingParameter
}
if p.IsNull() {
return nil, errNotAnArray
}
if p.cache == nil {
a := []Param{}
err := json.Unmarshal(p.RawMessage, &a)
if err != nil {
return nil, errNotAnArray
}
p.cache = a
}
if a, ok := p.cache.([]Param); ok {
return a, nil
}
return nil, errNotAnArray
}
// GetUint256 returns a Uint256 value of the parameter.
func (p *Param) GetUint256() (util.Uint256, error) {
s, err := p.GetString()
if err != nil {
return util.Uint256{}, err
}
return util.Uint256DecodeStringLE(strings.TrimPrefix(s, "0x"))
}
// GetUint160FromHex returns a Uint160 value of the parameter encoded in hex.
func (p *Param) GetUint160FromHex() (util.Uint160, error) {
s, err := p.GetString()
if err != nil {
return util.Uint160{}, err
}
return util.Uint160DecodeStringLE(strings.TrimPrefix(s, "0x"))
}
// GetUint160FromAddress returns a Uint160 value of the parameter that was
// supplied as an address.
func (p *Param) GetUint160FromAddress() (util.Uint160, error) {
s, err := p.GetString()
if err != nil {
return util.Uint160{}, err
}
return address.StringToUint160(s)
}
// GetUint160FromAddressOrHex returns a Uint160 value of the parameter that was
// supplied either as raw hex or as an address.
func (p *Param) GetUint160FromAddressOrHex() (util.Uint160, error) {
u, err := p.GetUint160FromHex()
if err == nil {
return u, err
}
return p.GetUint160FromAddress()
}
// GetFuncParam returns the current parameter as a function call parameter.
func (p *Param) GetFuncParam() (FuncParam, error) {
if p == nil {
return FuncParam{}, errMissingParameter
}
// This one doesn't need to be cached, it's used only once.
fp := FuncParam{}
err := json.Unmarshal(p.RawMessage, &fp)
return fp, err
}
// GetBytesHex returns a []byte value of the parameter if
// it is a hex-encoded string.
func (p *Param) GetBytesHex() ([]byte, error) {
s, err := p.GetString()
if err != nil {
return nil, err
}
return hex.DecodeString(s)
}
// GetBytesBase64 returns a []byte value of the parameter if
// it is a base64-encoded string.
func (p *Param) GetBytesBase64() ([]byte, error) {
s, err := p.GetString()
if err != nil {
return nil, err
}
return base64.StdEncoding.DecodeString(s)
}
// GetSignerWithWitness returns a neorpc.SignerWithWitness value of the parameter.
func (p *Param) GetSignerWithWitness() (neorpc.SignerWithWitness, error) {
// This one doesn't need to be cached, it's used only once.
c := neorpc.SignerWithWitness{}
err := json.Unmarshal(p.RawMessage, &c)
if err != nil {
return neorpc.SignerWithWitness{}, fmt.Errorf("not a signer: %w", err)
}
return c, nil
}
// GetSignersWithWitnesses returns a slice of SignerWithWitness with CalledByEntry
// scope from an array of Uint160 or an array of serialized transaction.Signer stored
// in the parameter.
func (p Param) GetSignersWithWitnesses() ([]transaction.Signer, []transaction.Witness, error) {
hashes, err := p.GetArray()
if err != nil {
return nil, nil, err
}
signers := make([]transaction.Signer, len(hashes))
witnesses := make([]transaction.Witness, len(hashes))
// try to extract hashes first
for i, h := range hashes {
var u util.Uint160
u, err = h.GetUint160FromHex()
if err != nil {
break
}
signers[i] = transaction.Signer{
Account: u,
Scopes: transaction.CalledByEntry,
}
}
if err != nil {
for i, h := range hashes {
signerWithWitness, err := h.GetSignerWithWitness()
if err != nil {
return nil, nil, err
}
signers[i] = signerWithWitness.Signer
witnesses[i] = signerWithWitness.Witness
}
}
return signers, witnesses, nil
}
// IsNull returns whether the parameter represents JSON nil value.
func (p *Param) IsNull() bool {
return bytes.Equal(p.RawMessage, jsonNullBytes)
}
// GetUUID returns UUID from parameter.
func (p *Param) GetUUID() (uuid.UUID, error) {
s, err := p.GetString()
if err != nil {
return uuid.UUID{}, err
}
id, err := uuid.Parse(s)
if err != nil {
return uuid.UUID{}, fmt.Errorf("not a valid UUID: %w", err)
}
return id, nil
}