aboutsummaryrefslogtreecommitdiff
path: root/qa/rpc-tests/test_framework/script.py
blob: 7678228c42bb5722f4479e6a77ae474d54e021ad (plain)
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
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
#!/usr/bin/env python3
# Copyright (c) 2015-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.

#
# script.py
#
# This file is modified from python-bitcoinlib.
#

"""Scripts

Functionality to build scripts, as well as SignatureHash().
"""


from .mininode import CTransaction, CTxOut, sha256, hash256, uint256_from_str, ser_uint256, ser_string
from binascii import hexlify
import hashlib

import sys
bchr = chr
bord = ord
if sys.version > '3':
    long = int
    bchr = lambda x: bytes([x])
    bord = lambda x: x

import struct

from .bignum import bn2vch

MAX_SCRIPT_SIZE = 10000
MAX_SCRIPT_ELEMENT_SIZE = 520
MAX_SCRIPT_OPCODES = 201

OPCODE_NAMES = {}

def hash160(s):
    return hashlib.new('ripemd160', sha256(s)).digest()


_opcode_instances = []
class CScriptOp(int):
    """A single script opcode"""
    __slots__ = []

    @staticmethod
    def encode_op_pushdata(d):
        """Encode a PUSHDATA op, returning bytes"""
        if len(d) < 0x4c:
            return b'' + bchr(len(d)) + d # OP_PUSHDATA
        elif len(d) <= 0xff:
            return b'\x4c' + bchr(len(d)) + d # OP_PUSHDATA1
        elif len(d) <= 0xffff:
            return b'\x4d' + struct.pack(b'<H', len(d)) + d # OP_PUSHDATA2
        elif len(d) <= 0xffffffff:
            return b'\x4e' + struct.pack(b'<I', len(d)) + d # OP_PUSHDATA4
        else:
            raise ValueError("Data too long to encode in a PUSHDATA op")

    @staticmethod
    def encode_op_n(n):
        """Encode a small integer op, returning an opcode"""
        if not (0 <= n <= 16):
            raise ValueError('Integer must be in range 0 <= n <= 16, got %d' % n)

        if n == 0:
            return OP_0
        else:
            return CScriptOp(OP_1 + n-1)

    def decode_op_n(self):
        """Decode a small integer opcode, returning an integer"""
        if self == OP_0:
            return 0

        if not (self == OP_0 or OP_1 <= self <= OP_16):
            raise ValueError('op %r is not an OP_N' % self)

        return int(self - OP_1+1)

    def is_small_int(self):
        """Return true if the op pushes a small integer to the stack"""
        if 0x51 <= self <= 0x60 or self == 0:
            return True
        else:
            return False

    def __str__(self):
        return repr(self)

    def __repr__(self):
        if self in OPCODE_NAMES:
            return OPCODE_NAMES[self]
        else:
            return 'CScriptOp(0x%x)' % self

    def __new__(cls, n):
        try:
            return _opcode_instances[n]
        except IndexError:
            assert len(_opcode_instances) == n
            _opcode_instances.append(super(CScriptOp, cls).__new__(cls, n))
            return _opcode_instances[n]

# Populate opcode instance table
for n in range(0xff+1):
    CScriptOp(n)


# push value
OP_0 = CScriptOp(0x00)
OP_FALSE = OP_0
OP_PUSHDATA1 = CScriptOp(0x4c)
OP_PUSHDATA2 = CScriptOp(0x4d)
OP_PUSHDATA4 = CScriptOp(0x4e)
OP_1NEGATE = CScriptOp(0x4f)
OP_RESERVED = CScriptOp(0x50)
OP_1 = CScriptOp(0x51)
OP_TRUE=OP_1
OP_2 = CScriptOp(0x52)
OP_3 = CScriptOp(0x53)
OP_4 = CScriptOp(0x54)
OP_5 = CScriptOp(0x55)
OP_6 = CScriptOp(0x56)
OP_7 = CScriptOp(0x57)
OP_8 = CScriptOp(0x58)
OP_9 = CScriptOp(0x59)
OP_10 = CScriptOp(0x5a)
OP_11 = CScriptOp(0x5b)
OP_12 = CScriptOp(0x5c)
OP_13 = CScriptOp(0x5d)
OP_14 = CScriptOp(0x5e)
OP_15 = CScriptOp(0x5f)
OP_16 = CScriptOp(0x60)

# control
OP_NOP = CScriptOp(0x61)
OP_VER = CScriptOp(0x62)
OP_IF = CScriptOp(0x63)
OP_NOTIF = CScriptOp(0x64)
OP_VERIF = CScriptOp(0x65)
OP_VERNOTIF = CScriptOp(0x66)
OP_ELSE = CScriptOp(0x67)
OP_ENDIF = CScriptOp(0x68)
OP_VERIFY = CScriptOp(0x69)
OP_RETURN = CScriptOp(0x6a)

# stack ops
OP_TOALTSTACK = CScriptOp(0x6b)
OP_FROMALTSTACK = CScriptOp(0x6c)
OP_2DROP = CScriptOp(0x6d)
OP_2DUP = CScriptOp(0x6e)
OP_3DUP = CScriptOp(0x6f)
OP_2OVER = CScriptOp(0x70)
OP_2ROT = CScriptOp(0x71)
OP_2SWAP = CScriptOp(0x72)
OP_IFDUP = CScriptOp(0x73)
OP_DEPTH = CScriptOp(0x74)
OP_DROP = CScriptOp(0x75)
OP_DUP = CScriptOp(0x76)
OP_NIP = CScriptOp(0x77)
OP_OVER = CScriptOp(0x78)
OP_PICK = CScriptOp(0x79)
OP_ROLL = CScriptOp(0x7a)
OP_ROT = CScriptOp(0x7b)
OP_SWAP = CScriptOp(0x7c)
OP_TUCK = CScriptOp(0x7d)

# splice ops
OP_CAT = CScriptOp(0x7e)
OP_SUBSTR = CScriptOp(0x7f)
OP_LEFT = CScriptOp(0x80)
OP_RIGHT = CScriptOp(0x81)
OP_SIZE = CScriptOp(0x82)

# bit logic
OP_INVERT = CScriptOp(0x83)
OP_AND = CScriptOp(0x84)
OP_OR = CScriptOp(0x85)
OP_XOR = CScriptOp(0x86)
OP_EQUAL = CScriptOp(0x87)
OP_EQUALVERIFY = CScriptOp(0x88)
OP_RESERVED1 = CScriptOp(0x89)
OP_RESERVED2 = CScriptOp(0x8a)

# numeric
OP_1ADD = CScriptOp(0x8b)
OP_1SUB = CScriptOp(0x8c)
OP_2MUL = CScriptOp(0x8d)
OP_2DIV = CScriptOp(0x8e)
OP_NEGATE = CScriptOp(0x8f)
OP_ABS = CScriptOp(0x90)
OP_NOT = CScriptOp(0x91)
OP_0NOTEQUAL = CScriptOp(0x92)

OP_ADD = CScriptOp(0x93)
OP_SUB = CScriptOp(0x94)
OP_MUL = CScriptOp(0x95)
OP_DIV = CScriptOp(0x96)
OP_MOD = CScriptOp(0x97)
OP_LSHIFT = CScriptOp(0x98)
OP_RSHIFT = CScriptOp(0x99)

OP_BOOLAND = CScriptOp(0x9a)
OP_BOOLOR = CScriptOp(0x9b)
OP_NUMEQUAL = CScriptOp(0x9c)
OP_NUMEQUALVERIFY = CScriptOp(0x9d)
OP_NUMNOTEQUAL = CScriptOp(0x9e)
OP_LESSTHAN = CScriptOp(0x9f)
OP_GREATERTHAN = CScriptOp(0xa0)
OP_LESSTHANOREQUAL = CScriptOp(0xa1)
OP_GREATERTHANOREQUAL = CScriptOp(0xa2)
OP_MIN = CScriptOp(0xa3)
OP_MAX = CScriptOp(0xa4)

OP_WITHIN = CScriptOp(0xa5)

# crypto
OP_RIPEMD160 = CScriptOp(0xa6)
OP_SHA1 = CScriptOp(0xa7)
OP_SHA256 = CScriptOp(0xa8)
OP_HASH160 = CScriptOp(0xa9)
OP_HASH256 = CScriptOp(0xaa)
OP_CODESEPARATOR = CScriptOp(0xab)
OP_CHECKSIG = CScriptOp(0xac)
OP_CHECKSIGVERIFY = CScriptOp(0xad)
OP_CHECKMULTISIG = CScriptOp(0xae)
OP_CHECKMULTISIGVERIFY = CScriptOp(0xaf)

# expansion
OP_NOP1 = CScriptOp(0xb0)
OP_CHECKLOCKTIMEVERIFY = CScriptOp(0xb1)
OP_NOP3 = CScriptOp(0xb2)
OP_NOP4 = CScriptOp(0xb3)
OP_NOP5 = CScriptOp(0xb4)
OP_NOP6 = CScriptOp(0xb5)
OP_NOP7 = CScriptOp(0xb6)
OP_NOP8 = CScriptOp(0xb7)
OP_NOP9 = CScriptOp(0xb8)
OP_NOP10 = CScriptOp(0xb9)

# template matching params
OP_SMALLINTEGER = CScriptOp(0xfa)
OP_PUBKEYS = CScriptOp(0xfb)
OP_PUBKEYHASH = CScriptOp(0xfd)
OP_PUBKEY = CScriptOp(0xfe)

OP_INVALIDOPCODE = CScriptOp(0xff)

VALID_OPCODES = {
    OP_1NEGATE,
    OP_RESERVED,
    OP_1,
    OP_2,
    OP_3,
    OP_4,
    OP_5,
    OP_6,
    OP_7,
    OP_8,
    OP_9,
    OP_10,
    OP_11,
    OP_12,
    OP_13,
    OP_14,
    OP_15,
    OP_16,

    OP_NOP,
    OP_VER,
    OP_IF,
    OP_NOTIF,
    OP_VERIF,
    OP_VERNOTIF,
    OP_ELSE,
    OP_ENDIF,
    OP_VERIFY,
    OP_RETURN,

    OP_TOALTSTACK,
    OP_FROMALTSTACK,
    OP_2DROP,
    OP_2DUP,
    OP_3DUP,
    OP_2OVER,
    OP_2ROT,
    OP_2SWAP,
    OP_IFDUP,
    OP_DEPTH,
    OP_DROP,
    OP_DUP,
    OP_NIP,
    OP_OVER,
    OP_PICK,
    OP_ROLL,
    OP_ROT,
    OP_SWAP,
    OP_TUCK,

    OP_CAT,
    OP_SUBSTR,
    OP_LEFT,
    OP_RIGHT,
    OP_SIZE,

    OP_INVERT,
    OP_AND,
    OP_OR,
    OP_XOR,
    OP_EQUAL,
    OP_EQUALVERIFY,
    OP_RESERVED1,
    OP_RESERVED2,

    OP_1ADD,
    OP_1SUB,
    OP_2MUL,
    OP_2DIV,
    OP_NEGATE,
    OP_ABS,
    OP_NOT,
    OP_0NOTEQUAL,

    OP_ADD,
    OP_SUB,
    OP_MUL,
    OP_DIV,
    OP_MOD,
    OP_LSHIFT,
    OP_RSHIFT,

    OP_BOOLAND,
    OP_BOOLOR,
    OP_NUMEQUAL,
    OP_NUMEQUALVERIFY,
    OP_NUMNOTEQUAL,
    OP_LESSTHAN,
    OP_GREATERTHAN,
    OP_LESSTHANOREQUAL,
    OP_GREATERTHANOREQUAL,
    OP_MIN,
    OP_MAX,

    OP_WITHIN,

    OP_RIPEMD160,
    OP_SHA1,
    OP_SHA256,
    OP_HASH160,
    OP_HASH256,
    OP_CODESEPARATOR,
    OP_CHECKSIG,
    OP_CHECKSIGVERIFY,
    OP_CHECKMULTISIG,
    OP_CHECKMULTISIGVERIFY,

    OP_NOP1,
    OP_CHECKLOCKTIMEVERIFY,
    OP_NOP3,
    OP_NOP4,
    OP_NOP5,
    OP_NOP6,
    OP_NOP7,
    OP_NOP8,
    OP_NOP9,
    OP_NOP10,

    OP_SMALLINTEGER,
    OP_PUBKEYS,
    OP_PUBKEYHASH,
    OP_PUBKEY,
}

OPCODE_NAMES.update({
    OP_0 : 'OP_0',
    OP_PUSHDATA1 : 'OP_PUSHDATA1',
    OP_PUSHDATA2 : 'OP_PUSHDATA2',
    OP_PUSHDATA4 : 'OP_PUSHDATA4',
    OP_1NEGATE : 'OP_1NEGATE',
    OP_RESERVED : 'OP_RESERVED',
    OP_1 : 'OP_1',
    OP_2 : 'OP_2',
    OP_3 : 'OP_3',
    OP_4 : 'OP_4',
    OP_5 : 'OP_5',
    OP_6 : 'OP_6',
    OP_7 : 'OP_7',
    OP_8 : 'OP_8',
    OP_9 : 'OP_9',
    OP_10 : 'OP_10',
    OP_11 : 'OP_11',
    OP_12 : 'OP_12',
    OP_13 : 'OP_13',
    OP_14 : 'OP_14',
    OP_15 : 'OP_15',
    OP_16 : 'OP_16',
    OP_NOP : 'OP_NOP',
    OP_VER : 'OP_VER',
    OP_IF : 'OP_IF',
    OP_NOTIF : 'OP_NOTIF',
    OP_VERIF : 'OP_VERIF',
    OP_VERNOTIF : 'OP_VERNOTIF',
    OP_ELSE : 'OP_ELSE',
    OP_ENDIF : 'OP_ENDIF',
    OP_VERIFY : 'OP_VERIFY',
    OP_RETURN : 'OP_RETURN',
    OP_TOALTSTACK : 'OP_TOALTSTACK',
    OP_FROMALTSTACK : 'OP_FROMALTSTACK',
    OP_2DROP : 'OP_2DROP',
    OP_2DUP : 'OP_2DUP',
    OP_3DUP : 'OP_3DUP',
    OP_2OVER : 'OP_2OVER',
    OP_2ROT : 'OP_2ROT',
    OP_2SWAP : 'OP_2SWAP',
    OP_IFDUP : 'OP_IFDUP',
    OP_DEPTH : 'OP_DEPTH',
    OP_DROP : 'OP_DROP',
    OP_DUP : 'OP_DUP',
    OP_NIP : 'OP_NIP',
    OP_OVER : 'OP_OVER',
    OP_PICK : 'OP_PICK',
    OP_ROLL : 'OP_ROLL',
    OP_ROT : 'OP_ROT',
    OP_SWAP : 'OP_SWAP',
    OP_TUCK : 'OP_TUCK',
    OP_CAT : 'OP_CAT',
    OP_SUBSTR : 'OP_SUBSTR',
    OP_LEFT : 'OP_LEFT',
    OP_RIGHT : 'OP_RIGHT',
    OP_SIZE : 'OP_SIZE',
    OP_INVERT : 'OP_INVERT',
    OP_AND : 'OP_AND',
    OP_OR : 'OP_OR',
    OP_XOR : 'OP_XOR',
    OP_EQUAL : 'OP_EQUAL',
    OP_EQUALVERIFY : 'OP_EQUALVERIFY',
    OP_RESERVED1 : 'OP_RESERVED1',
    OP_RESERVED2 : 'OP_RESERVED2',
    OP_1ADD : 'OP_1ADD',
    OP_1SUB : 'OP_1SUB',
    OP_2MUL : 'OP_2MUL',
    OP_2DIV : 'OP_2DIV',
    OP_NEGATE : 'OP_NEGATE',
    OP_ABS : 'OP_ABS',
    OP_NOT : 'OP_NOT',
    OP_0NOTEQUAL : 'OP_0NOTEQUAL',
    OP_ADD : 'OP_ADD',
    OP_SUB : 'OP_SUB',
    OP_MUL : 'OP_MUL',
    OP_DIV : 'OP_DIV',
    OP_MOD : 'OP_MOD',
    OP_LSHIFT : 'OP_LSHIFT',
    OP_RSHIFT : 'OP_RSHIFT',
    OP_BOOLAND : 'OP_BOOLAND',
    OP_BOOLOR : 'OP_BOOLOR',
    OP_NUMEQUAL : 'OP_NUMEQUAL',
    OP_NUMEQUALVERIFY : 'OP_NUMEQUALVERIFY',
    OP_NUMNOTEQUAL : 'OP_NUMNOTEQUAL',
    OP_LESSTHAN : 'OP_LESSTHAN',
    OP_GREATERTHAN : 'OP_GREATERTHAN',
    OP_LESSTHANOREQUAL : 'OP_LESSTHANOREQUAL',
    OP_GREATERTHANOREQUAL : 'OP_GREATERTHANOREQUAL',
    OP_MIN : 'OP_MIN',
    OP_MAX : 'OP_MAX',
    OP_WITHIN : 'OP_WITHIN',
    OP_RIPEMD160 : 'OP_RIPEMD160',
    OP_SHA1 : 'OP_SHA1',
    OP_SHA256 : 'OP_SHA256',
    OP_HASH160 : 'OP_HASH160',
    OP_HASH256 : 'OP_HASH256',
    OP_CODESEPARATOR : 'OP_CODESEPARATOR',
    OP_CHECKSIG : 'OP_CHECKSIG',
    OP_CHECKSIGVERIFY : 'OP_CHECKSIGVERIFY',
    OP_CHECKMULTISIG : 'OP_CHECKMULTISIG',
    OP_CHECKMULTISIGVERIFY : 'OP_CHECKMULTISIGVERIFY',
    OP_NOP1 : 'OP_NOP1',
    OP_CHECKLOCKTIMEVERIFY : 'OP_CHECKLOCKTIMEVERIFY',
    OP_NOP3 : 'OP_NOP3',
    OP_NOP4 : 'OP_NOP4',
    OP_NOP5 : 'OP_NOP5',
    OP_NOP6 : 'OP_NOP6',
    OP_NOP7 : 'OP_NOP7',
    OP_NOP8 : 'OP_NOP8',
    OP_NOP9 : 'OP_NOP9',
    OP_NOP10 : 'OP_NOP10',
    OP_SMALLINTEGER : 'OP_SMALLINTEGER',
    OP_PUBKEYS : 'OP_PUBKEYS',
    OP_PUBKEYHASH : 'OP_PUBKEYHASH',
    OP_PUBKEY : 'OP_PUBKEY',
    OP_INVALIDOPCODE : 'OP_INVALIDOPCODE',
})

OPCODES_BY_NAME = {
    'OP_0' : OP_0,
    'OP_PUSHDATA1' : OP_PUSHDATA1,
    'OP_PUSHDATA2' : OP_PUSHDATA2,
    'OP_PUSHDATA4' : OP_PUSHDATA4,
    'OP_1NEGATE' : OP_1NEGATE,
    'OP_RESERVED' : OP_RESERVED,
    'OP_1' : OP_1,
    'OP_2' : OP_2,
    'OP_3' : OP_3,
    'OP_4' : OP_4,
    'OP_5' : OP_5,
    'OP_6' : OP_6,
    'OP_7' : OP_7,
    'OP_8' : OP_8,
    'OP_9' : OP_9,
    'OP_10' : OP_10,
    'OP_11' : OP_11,
    'OP_12' : OP_12,
    'OP_13' : OP_13,
    'OP_14' : OP_14,
    'OP_15' : OP_15,
    'OP_16' : OP_16,
    'OP_NOP' : OP_NOP,
    'OP_VER' : OP_VER,
    'OP_IF' : OP_IF,
    'OP_NOTIF' : OP_NOTIF,
    'OP_VERIF' : OP_VERIF,
    'OP_VERNOTIF' : OP_VERNOTIF,
    'OP_ELSE' : OP_ELSE,
    'OP_ENDIF' : OP_ENDIF,
    'OP_VERIFY' : OP_VERIFY,
    'OP_RETURN' : OP_RETURN,
    'OP_TOALTSTACK' : OP_TOALTSTACK,
    'OP_FROMALTSTACK' : OP_FROMALTSTACK,
    'OP_2DROP' : OP_2DROP,
    'OP_2DUP' : OP_2DUP,
    'OP_3DUP' : OP_3DUP,
    'OP_2OVER' : OP_2OVER,
    'OP_2ROT' : OP_2ROT,
    'OP_2SWAP' : OP_2SWAP,
    'OP_IFDUP' : OP_IFDUP,
    'OP_DEPTH' : OP_DEPTH,
    'OP_DROP' : OP_DROP,
    'OP_DUP' : OP_DUP,
    'OP_NIP' : OP_NIP,
    'OP_OVER' : OP_OVER,
    'OP_PICK' : OP_PICK,
    'OP_ROLL' : OP_ROLL,
    'OP_ROT' : OP_ROT,
    'OP_SWAP' : OP_SWAP,
    'OP_TUCK' : OP_TUCK,
    'OP_CAT' : OP_CAT,
    'OP_SUBSTR' : OP_SUBSTR,
    'OP_LEFT' : OP_LEFT,
    'OP_RIGHT' : OP_RIGHT,
    'OP_SIZE' : OP_SIZE,
    'OP_INVERT' : OP_INVERT,
    'OP_AND' : OP_AND,
    'OP_OR' : OP_OR,
    'OP_XOR' : OP_XOR,
    'OP_EQUAL' : OP_EQUAL,
    'OP_EQUALVERIFY' : OP_EQUALVERIFY,
    'OP_RESERVED1' : OP_RESERVED1,
    'OP_RESERVED2' : OP_RESERVED2,
    'OP_1ADD' : OP_1ADD,
    'OP_1SUB' : OP_1SUB,
    'OP_2MUL' : OP_2MUL,
    'OP_2DIV' : OP_2DIV,
    'OP_NEGATE' : OP_NEGATE,
    'OP_ABS' : OP_ABS,
    'OP_NOT' : OP_NOT,
    'OP_0NOTEQUAL' : OP_0NOTEQUAL,
    'OP_ADD' : OP_ADD,
    'OP_SUB' : OP_SUB,
    'OP_MUL' : OP_MUL,
    'OP_DIV' : OP_DIV,
    'OP_MOD' : OP_MOD,
    'OP_LSHIFT' : OP_LSHIFT,
    'OP_RSHIFT' : OP_RSHIFT,
    'OP_BOOLAND' : OP_BOOLAND,
    'OP_BOOLOR' : OP_BOOLOR,
    'OP_NUMEQUAL' : OP_NUMEQUAL,
    'OP_NUMEQUALVERIFY' : OP_NUMEQUALVERIFY,
    'OP_NUMNOTEQUAL' : OP_NUMNOTEQUAL,
    'OP_LESSTHAN' : OP_LESSTHAN,
    'OP_GREATERTHAN' : OP_GREATERTHAN,
    'OP_LESSTHANOREQUAL' : OP_LESSTHANOREQUAL,
    'OP_GREATERTHANOREQUAL' : OP_GREATERTHANOREQUAL,
    'OP_MIN' : OP_MIN,
    'OP_MAX' : OP_MAX,
    'OP_WITHIN' : OP_WITHIN,
    'OP_RIPEMD160' : OP_RIPEMD160,
    'OP_SHA1' : OP_SHA1,
    'OP_SHA256' : OP_SHA256,
    'OP_HASH160' : OP_HASH160,
    'OP_HASH256' : OP_HASH256,
    'OP_CODESEPARATOR' : OP_CODESEPARATOR,
    'OP_CHECKSIG' : OP_CHECKSIG,
    'OP_CHECKSIGVERIFY' : OP_CHECKSIGVERIFY,
    'OP_CHECKMULTISIG' : OP_CHECKMULTISIG,
    'OP_CHECKMULTISIGVERIFY' : OP_CHECKMULTISIGVERIFY,
    'OP_NOP1' : OP_NOP1,
    'OP_CHECKLOCKTIMEVERIFY' : OP_CHECKLOCKTIMEVERIFY,
    'OP_NOP3' : OP_NOP3,
    'OP_NOP4' : OP_NOP4,
    'OP_NOP5' : OP_NOP5,
    'OP_NOP6' : OP_NOP6,
    'OP_NOP7' : OP_NOP7,
    'OP_NOP8' : OP_NOP8,
    'OP_NOP9' : OP_NOP9,
    'OP_NOP10' : OP_NOP10,
    'OP_SMALLINTEGER' : OP_SMALLINTEGER,
    'OP_PUBKEYS' : OP_PUBKEYS,
    'OP_PUBKEYHASH' : OP_PUBKEYHASH,
    'OP_PUBKEY' : OP_PUBKEY,
}

class CScriptInvalidError(Exception):
    """Base class for CScript exceptions"""
    pass

class CScriptTruncatedPushDataError(CScriptInvalidError):
    """Invalid pushdata due to truncation"""
    def __init__(self, msg, data):
        self.data = data
        super(CScriptTruncatedPushDataError, self).__init__(msg)

# This is used, eg, for blockchain heights in coinbase scripts (bip34)
class CScriptNum(object):
    def __init__(self, d=0):
        self.value = d

    @staticmethod
    def encode(obj):
        r = bytearray(0)
        if obj.value == 0:
            return bytes(r)
        neg = obj.value < 0
        absvalue = -obj.value if neg else obj.value
        while (absvalue):
            r.append(absvalue & 0xff)
            absvalue >>= 8
        if r[-1] & 0x80:
            r.append(0x80 if neg else 0)
        elif neg:
            r[-1] |= 0x80
        return bytes(bchr(len(r)) + r)


class CScript(bytes):
    """Serialized script

    A bytes subclass, so you can use this directly whenever bytes are accepted.
    Note that this means that indexing does *not* work - you'll get an index by
    byte rather than opcode. This format was chosen for efficiency so that the
    general case would not require creating a lot of little CScriptOP objects.

    iter(script) however does iterate by opcode.
    """
    @classmethod
    def __coerce_instance(cls, other):
        # Coerce other into bytes
        if isinstance(other, CScriptOp):
            other = bchr(other)
        elif isinstance(other, CScriptNum):
            if (other.value == 0):
                other = bchr(CScriptOp(OP_0))
            else:
                other = CScriptNum.encode(other)
        elif isinstance(other, int):
            if 0 <= other <= 16:
                other = bytes(bchr(CScriptOp.encode_op_n(other)))
            elif other == -1:
                other = bytes(bchr(OP_1NEGATE))
            else:
                other = CScriptOp.encode_op_pushdata(bn2vch(other))
        elif isinstance(other, (bytes, bytearray)):
            other = CScriptOp.encode_op_pushdata(other)
        return other

    def __add__(self, other):
        # Do the coercion outside of the try block so that errors in it are
        # noticed.
        other = self.__coerce_instance(other)

        try:
            # bytes.__add__ always returns bytes instances unfortunately
            return CScript(super(CScript, self).__add__(other))
        except TypeError:
            raise TypeError('Can not add a %r instance to a CScript' % other.__class__)

    def join(self, iterable):
        # join makes no sense for a CScript()
        raise NotImplementedError

    def __new__(cls, value=b''):
        if isinstance(value, bytes) or isinstance(value, bytearray):
            return super(CScript, cls).__new__(cls, value)
        else:
            def coerce_iterable(iterable):
                for instance in iterable:
                    yield cls.__coerce_instance(instance)
            # Annoyingly on both python2 and python3 bytes.join() always
            # returns a bytes instance even when subclassed.
            return super(CScript, cls).__new__(cls, b''.join(coerce_iterable(value)))

    def raw_iter(self):
        """Raw iteration

        Yields tuples of (opcode, data, sop_idx) so that the different possible
        PUSHDATA encodings can be accurately distinguished, as well as
        determining the exact opcode byte indexes. (sop_idx)
        """
        i = 0
        while i < len(self):
            sop_idx = i
            opcode = bord(self[i])
            i += 1

            if opcode > OP_PUSHDATA4:
                yield (opcode, None, sop_idx)
            else:
                datasize = None
                pushdata_type = None
                if opcode < OP_PUSHDATA1:
                    pushdata_type = 'PUSHDATA(%d)' % opcode
                    datasize = opcode

                elif opcode == OP_PUSHDATA1:
                    pushdata_type = 'PUSHDATA1'
                    if i >= len(self):
                        raise CScriptInvalidError('PUSHDATA1: missing data length')
                    datasize = bord(self[i])
                    i += 1

                elif opcode == OP_PUSHDATA2:
                    pushdata_type = 'PUSHDATA2'
                    if i + 1 >= len(self):
                        raise CScriptInvalidError('PUSHDATA2: missing data length')
                    datasize = bord(self[i]) + (bord(self[i+1]) << 8)
                    i += 2

                elif opcode == OP_PUSHDATA4:
                    pushdata_type = 'PUSHDATA4'
                    if i + 3 >= len(self):
                        raise CScriptInvalidError('PUSHDATA4: missing data length')
                    datasize = bord(self[i]) + (bord(self[i+1]) << 8) + (bord(self[i+2]) << 16) + (bord(self[i+3]) << 24)
                    i += 4

                else:
                    assert False # shouldn't happen


                data = bytes(self[i:i+datasize])

                # Check for truncation
                if len(data) < datasize:
                    raise CScriptTruncatedPushDataError('%s: truncated data' % pushdata_type, data)

                i += datasize

                yield (opcode, data, sop_idx)

    def __iter__(self):
        """'Cooked' iteration

        Returns either a CScriptOP instance, an integer, or bytes, as
        appropriate.

        See raw_iter() if you need to distinguish the different possible
        PUSHDATA encodings.
        """
        for (opcode, data, sop_idx) in self.raw_iter():
            if data is not None:
                yield data
            else:
                opcode = CScriptOp(opcode)

                if opcode.is_small_int():
                    yield opcode.decode_op_n()
                else:
                    yield CScriptOp(opcode)

    def __repr__(self):
        # For Python3 compatibility add b before strings so testcases don't
        # need to change
        def _repr(o):
            if isinstance(o, bytes):
                return b"x('%s')" % hexlify(o).decode('ascii')
            else:
                return repr(o)

        ops = []
        i = iter(self)
        while True:
            op = None
            try:
                op = _repr(next(i))
            except CScriptTruncatedPushDataError as err:
                op = '%s...<ERROR: %s>' % (_repr(err.data), err)
                break
            except CScriptInvalidError as err:
                op = '<ERROR: %s>' % err
                break
            except StopIteration:
                break
            finally:
                if op is not None:
                    ops.append(op)

        return "CScript([%s])" % ', '.join(ops)

    def GetSigOpCount(self, fAccurate):
        """Get the SigOp count.

        fAccurate - Accurately count CHECKMULTISIG, see BIP16 for details.

        Note that this is consensus-critical.
        """
        n = 0
        lastOpcode = OP_INVALIDOPCODE
        for (opcode, data, sop_idx) in self.raw_iter():
            if opcode in (OP_CHECKSIG, OP_CHECKSIGVERIFY):
                n += 1
            elif opcode in (OP_CHECKMULTISIG, OP_CHECKMULTISIGVERIFY):
                if fAccurate and (OP_1 <= lastOpcode <= OP_16):
                    n += opcode.decode_op_n()
                else:
                    n += 20
            lastOpcode = opcode
        return n


SIGHASH_ALL = 1
SIGHASH_NONE = 2
SIGHASH_SINGLE = 3
SIGHASH_ANYONECANPAY = 0x80

def FindAndDelete(script, sig):
    """Consensus critical, see FindAndDelete() in Satoshi codebase"""
    r = b''
    last_sop_idx = sop_idx = 0
    skip = True
    for (opcode, data, sop_idx) in script.raw_iter():
        if not skip:
            r += script[last_sop_idx:sop_idx]
        last_sop_idx = sop_idx
        if script[sop_idx:sop_idx + len(sig)] == sig:
            skip = True
        else:
            skip = False
    if not skip:
        r += script[last_sop_idx:]
    return CScript(r)


def SignatureHash(script, txTo, inIdx, hashtype):
    """Consensus-correct SignatureHash

    Returns (hash, err) to precisely match the consensus-critical behavior of
    the SIGHASH_SINGLE bug. (inIdx is *not* checked for validity)
    """
    HASH_ONE = b'\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'

    if inIdx >= len(txTo.vin):
        return (HASH_ONE, "inIdx %d out of range (%d)" % (inIdx, len(txTo.vin)))
    txtmp = CTransaction(txTo)

    for txin in txtmp.vin:
        txin.scriptSig = b''
    txtmp.vin[inIdx].scriptSig = FindAndDelete(script, CScript([OP_CODESEPARATOR]))

    if (hashtype & 0x1f) == SIGHASH_NONE:
        txtmp.vout = []

        for i in range(len(txtmp.vin)):
            if i != inIdx:
                txtmp.vin[i].nSequence = 0

    elif (hashtype & 0x1f) == SIGHASH_SINGLE:
        outIdx = inIdx
        if outIdx >= len(txtmp.vout):
            return (HASH_ONE, "outIdx %d out of range (%d)" % (outIdx, len(txtmp.vout)))

        tmp = txtmp.vout[outIdx]
        txtmp.vout = []
        for i in range(outIdx):
            txtmp.vout.append(CTxOut())
        txtmp.vout.append(tmp)

        for i in range(len(txtmp.vin)):
            if i != inIdx:
                txtmp.vin[i].nSequence = 0

    if hashtype & SIGHASH_ANYONECANPAY:
        tmp = txtmp.vin[inIdx]
        txtmp.vin = []
        txtmp.vin.append(tmp)

    s = txtmp.serialize()
    s += struct.pack(b"<I", hashtype)

    hash = hash256(s)

    return (hash, None)

# TODO: Allow cached hashPrevouts/hashSequence/hashOutputs to be provided.
# Performance optimization probably not necessary for python tests, however.
# Note that this corresponds to sigversion == 1 in EvalScript, which is used
# for version 0 witnesses.
def SegwitVersion1SignatureHash(script, txTo, inIdx, hashtype, amount):

    hashPrevouts = 0
    hashSequence = 0
    hashOutputs = 0

    if not (hashtype & SIGHASH_ANYONECANPAY):
        serialize_prevouts = bytes()
        for i in txTo.vin:
            serialize_prevouts += i.prevout.serialize()
        hashPrevouts = uint256_from_str(hash256(serialize_prevouts))

    if (not (hashtype & SIGHASH_ANYONECANPAY) and (hashtype & 0x1f) != SIGHASH_SINGLE and (hashtype & 0x1f) != SIGHASH_NONE):
        serialize_sequence = bytes()
        for i in txTo.vin:
            serialize_sequence += struct.pack("<I", i.nSequence)
        hashSequence = uint256_from_str(hash256(serialize_sequence))

    if ((hashtype & 0x1f) != SIGHASH_SINGLE and (hashtype & 0x1f) != SIGHASH_NONE):
        serialize_outputs = bytes()
        for o in txTo.vout:
            serialize_outputs += o.serialize()
        hashOutputs = uint256_from_str(hash256(serialize_outputs))
    elif ((hashtype & 0x1f) == SIGHASH_SINGLE and inIdx < len(txTo.vout)):
        serialize_outputs = txTo.vout[inIdx].serialize()
        hashOutputs = uint256_from_str(hash256(serialize_outputs))

    ss = bytes()
    ss += struct.pack("<i", txTo.nVersion)
    ss += ser_uint256(hashPrevouts)
    ss += ser_uint256(hashSequence)
    ss += txTo.vin[inIdx].prevout.serialize()
    ss += ser_string(script)
    ss += struct.pack("<q", amount)
    ss += struct.pack("<I", txTo.vin[inIdx].nSequence)
    ss += ser_uint256(hashOutputs)
    ss += struct.pack("<i", txTo.nLockTime)
    ss += struct.pack("<I", hashtype)

    return hash256(ss)