/
mockstub.go
445 lines (371 loc) · 13.4 KB
/
mockstub.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
/*
Copyright IBM Corp. 2016 All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Package shim provides APIs for the chaincode to access its state
// variables, transaction context and call other chaincodes.
package shim
import (
"container/list"
"errors"
"strings"
"github.com/golang/protobuf/ptypes/timestamp"
"github.com/hyperledger/fabric/core/chaincode/shim/crypto/attr"
"github.com/op/go-logging"
)
// Logger for the shim package.
var mockLogger = logging.MustGetLogger("mock")
// MockStub is an implementation of ChaincodeStubInterface for unit testing chaincode.
// Use this instead of ChaincodeStub in your chaincode's unit test calls to Init, Query or Invoke.
type MockStub struct {
// arguments the stub was called with
args [][]byte
// A pointer back to the chaincode that will invoke this, set by constructor.
// If a peer calls this stub, the chaincode will be invoked from here.
cc Chaincode
// A nice name that can be used for logging
Name string
// State keeps name value pairs
State map[string][]byte
// Keys stores the list of mapped values in lexical order
Keys *list.List
// registered list of other MockStub chaincodes that can be called from this MockStub
Invokables map[string]*MockStub
// stores a transaction uuid while being Invoked / Deployed
// TODO if a chaincode uses recursion this may need to be a stack of TxIDs or possibly a reference counting map
TxID string
}
func (stub *MockStub) GetTxID() string {
return stub.TxID
}
func (stub *MockStub) GetArgs() [][]byte {
return stub.args
}
func (stub *MockStub) GetStringArgs() []string {
args := stub.GetArgs()
strargs := make([]string, 0, len(args))
for _, barg := range args {
strargs = append(strargs, string(barg))
}
return strargs
}
// Used to indicate to a chaincode that it is part of a transaction.
// This is important when chaincodes invoke each other.
// MockStub doesn't support concurrent transactions at present.
func (stub *MockStub) MockTransactionStart(txid string) {
stub.TxID = txid
}
// End a mocked transaction, clearing the UUID.
func (stub *MockStub) MockTransactionEnd(uuid string) {
stub.TxID = ""
}
// Register a peer chaincode with this MockStub
// invokableChaincodeName is the name or hash of the peer
// otherStub is a MockStub of the peer, already intialised
func (stub *MockStub) MockPeerChaincode(invokableChaincodeName string, otherStub *MockStub) {
stub.Invokables[invokableChaincodeName] = otherStub
}
// Initialise this chaincode, also starts and ends a transaction.
func (stub *MockStub) MockInit(uuid string, function string, args []string) ([]byte, error) {
stub.args = getBytes(function, args)
stub.MockTransactionStart(uuid)
bytes, err := stub.cc.Init(stub, function, args)
stub.MockTransactionEnd(uuid)
return bytes, err
}
// Invoke this chaincode, also starts and ends a transaction.
func (stub *MockStub) MockInvoke(uuid string, function string, args []string) ([]byte, error) {
stub.args = getBytes(function, args)
stub.MockTransactionStart(uuid)
bytes, err := stub.cc.Invoke(stub, function, args)
stub.MockTransactionEnd(uuid)
return bytes, err
}
// Query this chaincode
func (stub *MockStub) MockQuery(function string, args []string) ([]byte, error) {
stub.args = getBytes(function, args)
// no transaction needed for queries
bytes, err := stub.cc.Query(stub, function, args)
return bytes, err
}
// GetState retrieves the value for a given key from the ledger
func (stub *MockStub) GetState(key string) ([]byte, error) {
value := stub.State[key]
mockLogger.Debug("MockStub", stub.Name, "Getting", key, value)
return value, nil
}
// PutState writes the specified `value` and `key` into the ledger.
func (stub *MockStub) PutState(key string, value []byte) error {
if stub.TxID == "" {
mockLogger.Error("Cannot PutState without a transactions - call stub.MockTransactionStart()?")
return errors.New("Cannot PutState without a transactions - call stub.MockTransactionStart()?")
}
mockLogger.Debug("MockStub", stub.Name, "Putting", key, value)
stub.State[key] = value
// insert key into ordered list of keys
for elem := stub.Keys.Front(); elem != nil; elem = elem.Next() {
elemValue := elem.Value.(string)
comp := strings.Compare(key, elemValue)
mockLogger.Debug("MockStub", stub.Name, "Compared", key, elemValue, " and got ", comp)
if comp < 0 {
// key < elem, insert it before elem
stub.Keys.InsertBefore(key, elem)
mockLogger.Debug("MockStub", stub.Name, "Key", key, " inserted before", elem.Value)
break
} else if comp == 0 {
// keys exists, no need to change
mockLogger.Debug("MockStub", stub.Name, "Key", key, "already in State")
break
} else { // comp > 0
// key > elem, keep looking unless this is the end of the list
if elem.Next() == nil {
stub.Keys.PushBack(key)
mockLogger.Debug("MockStub", stub.Name, "Key", key, "appended")
break
}
}
}
// special case for empty Keys list
if stub.Keys.Len() == 0 {
stub.Keys.PushFront(key)
mockLogger.Debug("MockStub", stub.Name, "Key", key, "is first element in list")
}
return nil
}
// DelState removes the specified `key` and its value from the ledger.
func (stub *MockStub) DelState(key string) error {
mockLogger.Debug("MockStub", stub.Name, "Deleting", key, stub.State[key])
delete(stub.State, key)
for elem := stub.Keys.Front(); elem != nil; elem = elem.Next() {
if strings.Compare(key, elem.Value.(string)) == 0 {
stub.Keys.Remove(elem)
}
}
return nil
}
func (stub *MockStub) RangeQueryState(startKey, endKey string) (StateRangeQueryIteratorInterface, error) {
return NewMockStateRangeQueryIterator(stub, startKey, endKey), nil
}
// Not implemented
func (stub *MockStub) CreateTable(name string, columnDefinitions []*ColumnDefinition) error {
return nil
}
// Not implemented
func (stub *MockStub) GetTable(tableName string) (*Table, error) {
return nil, nil
}
// Not implemented
func (stub *MockStub) DeleteTable(tableName string) error {
return nil
}
// Not implemented
func (stub *MockStub) InsertRow(tableName string, row Row) (bool, error) {
return false, nil
}
// Not implemented
func (stub *MockStub) ReplaceRow(tableName string, row Row) (bool, error) {
return false, nil
}
// Not implemented
func (stub *MockStub) GetRow(tableName string, key []Column) (Row, error) {
var r Row
return r, nil
}
// Not implemented
func (stub *MockStub) GetRows(tableName string, key []Column) (<-chan Row, error) {
return nil, nil
}
// Not implemented
func (stub *MockStub) DeleteRow(tableName string, key []Column) error {
return nil
}
// Invokes a peered chaincode.
// E.g. stub1.InvokeChaincode("stub2Hash", funcArgs)
// Before calling this make sure to create another MockStub stub2, call stub2.MockInit(uuid, func, args)
// and register it with stub1 by calling stub1.MockPeerChaincode("stub2Hash", stub2)
func (stub *MockStub) InvokeChaincode(chaincodeName string, args [][]byte) ([]byte, error) {
// TODO "args" here should possibly be a serialized pb.ChaincodeInput
function, params := getFuncArgs(args)
otherStub := stub.Invokables[chaincodeName]
mockLogger.Debug("MockStub", stub.Name, "Invoking peer chaincode", otherStub.Name, args)
// function, strings := getFuncArgs(args)
bytes, err := otherStub.MockInvoke(stub.TxID, function, params)
mockLogger.Debug("MockStub", stub.Name, "Invoked peer chaincode", otherStub.Name, "got", bytes, err)
return bytes, err
}
func (stub *MockStub) QueryChaincode(chaincodeName string, args [][]byte) ([]byte, error) {
// TODO "args" here should possibly be a serialized pb.ChaincodeInput
mockLogger.Debug("MockStub", stub.Name, "Looking for peer chaincode", chaincodeName)
otherStub := stub.Invokables[chaincodeName]
if otherStub == nil {
mockLogger.Error("Could not find peer chaincode to query", chaincodeName)
return nil, errors.New("Could not find peer chaincode to query")
}
mockLogger.Debug("MockStub", stub.Name, "Querying peer chaincode", otherStub.Name, args)
function, params := getFuncArgs(args)
bytes, err := otherStub.MockQuery(function, params)
mockLogger.Debug("MockStub", stub.Name, "Queried peer chaincode", otherStub.Name, "got", bytes, err)
return bytes, err
}
// Not implemented
func (stub *MockStub) ReadCertAttribute(attributeName string) ([]byte, error) {
return nil, nil
}
// Not implemented
func (stub *MockStub) VerifyAttribute(attributeName string, attributeValue []byte) (bool, error) {
return false, nil
}
// Not implemented
func (stub *MockStub) VerifyAttributes(attrs ...*attr.Attribute) (bool, error) {
return false, nil
}
// Not implemented
func (stub *MockStub) VerifySignature(certificate, signature, message []byte) (bool, error) {
return false, nil
}
// Not implemented
func (stub *MockStub) GetCallerCertificate() ([]byte, error) {
return nil, nil
}
// Not implemented
func (stub *MockStub) GetCallerMetadata() ([]byte, error) {
return nil, nil
}
// Not implemented
func (stub *MockStub) GetBinding() ([]byte, error) {
return nil, nil
}
// Not implemented
func (stub *MockStub) GetPayload() ([]byte, error) {
return nil, nil
}
// Not implemented
func (stub *MockStub) GetTxTimestamp() (*timestamp.Timestamp, error) {
return nil, nil
}
// Not implemented
func (stub *MockStub) SetEvent(name string, payload []byte) error {
return nil
}
// Constructor to initialise the internal State map
func NewMockStub(name string, cc Chaincode) *MockStub {
mockLogger.Debug("MockStub(", name, cc, ")")
s := new(MockStub)
s.Name = name
s.cc = cc
s.State = make(map[string][]byte)
s.Invokables = make(map[string]*MockStub)
s.Keys = list.New()
return s
}
/*****************************
Range Query Iterator
*****************************/
type MockStateRangeQueryIterator struct {
Closed bool
Stub *MockStub
StartKey string
EndKey string
Current *list.Element
}
// HasNext returns true if the range query iterator contains additional keys
// and values.
func (iter *MockStateRangeQueryIterator) HasNext() bool {
if iter.Closed {
// previously called Close()
mockLogger.Error("HasNext() but already closed")
return false
}
if iter.Current == nil {
mockLogger.Error("HasNext() couldn't get Current")
return false
}
if iter.Current.Next() == nil {
// we've reached the end of the underlying values
mockLogger.Debug("HasNext() but no next")
return false
}
if iter.EndKey == iter.Current.Value {
// we've reached the end of the specified range
mockLogger.Debug("HasNext() at end of specified range")
return false
}
mockLogger.Debug("HasNext() got next")
return true
}
// Next returns the next key and value in the range query iterator.
func (iter *MockStateRangeQueryIterator) Next() (string, []byte, error) {
if iter.Closed == true {
mockLogger.Error("MockStateRangeQueryIterator.Next() called after Close()")
return "", nil, errors.New("MockStateRangeQueryIterator.Next() called after Close()")
}
if iter.HasNext() == false {
mockLogger.Error("MockStateRangeQueryIterator.Next() called when it does not HaveNext()")
return "", nil, errors.New("MockStateRangeQueryIterator.Next() called when it does not HaveNext()")
}
iter.Current = iter.Current.Next()
if iter.Current == nil {
mockLogger.Error("MockStateRangeQueryIterator.Next() went past end of range")
return "", nil, errors.New("MockStateRangeQueryIterator.Next() went past end of range")
}
key := iter.Current.Value.(string)
value, err := iter.Stub.GetState(key)
return key, value, err
}
// Close closes the range query iterator. This should be called when done
// reading from the iterator to free up resources.
func (iter *MockStateRangeQueryIterator) Close() error {
if iter.Closed == true {
mockLogger.Error("MockStateRangeQueryIterator.Close() called after Close()")
return errors.New("MockStateRangeQueryIterator.Close() called after Close()")
}
iter.Closed = true
return nil
}
func (iter *MockStateRangeQueryIterator) Print() {
mockLogger.Debug("MockStateRangeQueryIterator {")
mockLogger.Debug("Closed?", iter.Closed)
mockLogger.Debug("Stub", iter.Stub)
mockLogger.Debug("StartKey", iter.StartKey)
mockLogger.Debug("EndKey", iter.EndKey)
mockLogger.Debug("Current", iter.Current)
mockLogger.Debug("HasNext?", iter.HasNext())
mockLogger.Debug("}")
}
func NewMockStateRangeQueryIterator(stub *MockStub, startKey string, endKey string) *MockStateRangeQueryIterator {
mockLogger.Debug("NewMockStateRangeQueryIterator(", stub, startKey, endKey, ")")
iter := new(MockStateRangeQueryIterator)
iter.Closed = false
iter.Stub = stub
iter.StartKey = startKey
iter.EndKey = endKey
iter.Current = stub.Keys.Front()
iter.Print()
return iter
}
func getBytes(function string, args []string) [][]byte {
bytes := make([][]byte, 0, len(args)+1)
bytes = append(bytes, []byte(function))
for _, s := range args {
bytes = append(bytes, []byte(s))
}
return bytes
}
func getFuncArgs(bytes [][]byte) (string, []string) {
mockLogger.Debugf("getFuncArgs(%x)", bytes)
function := string(bytes[0])
args := make([]string, len(bytes)-1)
for i := 1; i < len(bytes); i++ {
mockLogger.Debugf("getFuncArgs - i:%x, len(bytes):%x", i, len(bytes))
args[i-1] = string(bytes[i])
}
return function, args
}