aboutsummaryrefslogtreecommitdiff
path: root/src/test/script_tests.cpp
blob: ee0f14ee5e896b07250ada660785b952a2f48b26 (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
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
// Copyright (c) 2011-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "data/script_tests.json.h"

#include "core_io.h"
#include "key.h"
#include "keystore.h"
#include "script/script.h"
#include "script/script_error.h"
#include "script/sign.h"
#include "util.h"
#include "utilstrencodings.h"
#include "test/test_bitcoin.h"
#include "rpc/server.h"

#if defined(HAVE_CONSENSUS_LIB)
#include "script/bitcoinconsensus.h"
#endif

#include <fstream>
#include <stdint.h>
#include <string>
#include <vector>

#include <boost/foreach.hpp>
#include <boost/test/unit_test.hpp>

#include <univalue.h>

using namespace std;

// Uncomment if you want to output updated JSON tests.
// #define UPDATE_JSON_TESTS

static const unsigned int flags = SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC;

unsigned int ParseScriptFlags(string strFlags);
string FormatScriptFlags(unsigned int flags);

UniValue
read_json(const std::string& jsondata)
{
    UniValue v;

    if (!v.read(jsondata) || !v.isArray())
    {
        BOOST_ERROR("Parse error.");
        return UniValue(UniValue::VARR);
    }
    return v.get_array();
}

struct ScriptErrorDesc
{
    ScriptError_t err;
    const char *name;
};

static ScriptErrorDesc script_errors[]={
    {SCRIPT_ERR_OK, "OK"},
    {SCRIPT_ERR_UNKNOWN_ERROR, "UNKNOWN_ERROR"},
    {SCRIPT_ERR_EVAL_FALSE, "EVAL_FALSE"},
    {SCRIPT_ERR_OP_RETURN, "OP_RETURN"},
    {SCRIPT_ERR_SCRIPT_SIZE, "SCRIPT_SIZE"},
    {SCRIPT_ERR_PUSH_SIZE, "PUSH_SIZE"},
    {SCRIPT_ERR_OP_COUNT, "OP_COUNT"},
    {SCRIPT_ERR_STACK_SIZE, "STACK_SIZE"},
    {SCRIPT_ERR_SIG_COUNT, "SIG_COUNT"},
    {SCRIPT_ERR_PUBKEY_COUNT, "PUBKEY_COUNT"},
    {SCRIPT_ERR_VERIFY, "VERIFY"},
    {SCRIPT_ERR_EQUALVERIFY, "EQUALVERIFY"},
    {SCRIPT_ERR_CHECKMULTISIGVERIFY, "CHECKMULTISIGVERIFY"},
    {SCRIPT_ERR_CHECKSIGVERIFY, "CHECKSIGVERIFY"},
    {SCRIPT_ERR_NUMEQUALVERIFY, "NUMEQUALVERIFY"},
    {SCRIPT_ERR_BAD_OPCODE, "BAD_OPCODE"},
    {SCRIPT_ERR_DISABLED_OPCODE, "DISABLED_OPCODE"},
    {SCRIPT_ERR_INVALID_STACK_OPERATION, "INVALID_STACK_OPERATION"},
    {SCRIPT_ERR_INVALID_ALTSTACK_OPERATION, "INVALID_ALTSTACK_OPERATION"},
    {SCRIPT_ERR_UNBALANCED_CONDITIONAL, "UNBALANCED_CONDITIONAL"},
    {SCRIPT_ERR_NEGATIVE_LOCKTIME, "NEGATIVE_LOCKTIME"},
    {SCRIPT_ERR_UNSATISFIED_LOCKTIME, "UNSATISFIED_LOCKTIME"},
    {SCRIPT_ERR_SIG_HASHTYPE, "SIG_HASHTYPE"},
    {SCRIPT_ERR_SIG_DER, "SIG_DER"},
    {SCRIPT_ERR_MINIMALDATA, "MINIMALDATA"},
    {SCRIPT_ERR_SIG_PUSHONLY, "SIG_PUSHONLY"},
    {SCRIPT_ERR_SIG_HIGH_S, "SIG_HIGH_S"},
    {SCRIPT_ERR_SIG_NULLDUMMY, "SIG_NULLDUMMY"},
    {SCRIPT_ERR_PUBKEYTYPE, "PUBKEYTYPE"},
    {SCRIPT_ERR_CLEANSTACK, "CLEANSTACK"},
    {SCRIPT_ERR_MINIMALIF, "MINIMALIF"},
    {SCRIPT_ERR_DISCOURAGE_UPGRADABLE_NOPS, "DISCOURAGE_UPGRADABLE_NOPS"},
    {SCRIPT_ERR_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM, "DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM"},
    {SCRIPT_ERR_WITNESS_PROGRAM_WRONG_LENGTH, "WITNESS_PROGRAM_WRONG_LENGTH"},
    {SCRIPT_ERR_WITNESS_PROGRAM_WITNESS_EMPTY, "WITNESS_PROGRAM_WITNESS_EMPTY"},
    {SCRIPT_ERR_WITNESS_PROGRAM_MISMATCH, "WITNESS_PROGRAM_MISMATCH"},
    {SCRIPT_ERR_WITNESS_MALLEATED, "WITNESS_MALLEATED"},
    {SCRIPT_ERR_WITNESS_MALLEATED_P2SH, "WITNESS_MALLEATED_P2SH"},
    {SCRIPT_ERR_WITNESS_UNEXPECTED, "WITNESS_UNEXPECTED"},
};

const char *FormatScriptError(ScriptError_t err)
{
    for (unsigned int i=0; i<ARRAYLEN(script_errors); ++i)
        if (script_errors[i].err == err)
            return script_errors[i].name;
    BOOST_ERROR("Unknown scripterror enumeration value, update script_errors in script_tests.cpp.");
    return "";
}

ScriptError_t ParseScriptError(const std::string &name)
{
    for (unsigned int i=0; i<ARRAYLEN(script_errors); ++i)
        if (script_errors[i].name == name)
            return script_errors[i].err;
    BOOST_ERROR("Unknown scripterror \"" << name << "\" in test description");
    return SCRIPT_ERR_UNKNOWN_ERROR;
}

BOOST_FIXTURE_TEST_SUITE(script_tests, BasicTestingSetup)

CMutableTransaction BuildCreditingTransaction(const CScript& scriptPubKey, int nValue = 0)
{
    CMutableTransaction txCredit;
    txCredit.nVersion = 1;
    txCredit.nLockTime = 0;
    txCredit.vin.resize(1);
    txCredit.vout.resize(1);
    txCredit.vin[0].prevout.SetNull();
    txCredit.vin[0].scriptSig = CScript() << CScriptNum(0) << CScriptNum(0);
    txCredit.vin[0].nSequence = CTxIn::SEQUENCE_FINAL;
    txCredit.vout[0].scriptPubKey = scriptPubKey;
    txCredit.vout[0].nValue = nValue;

    return txCredit;
}

CMutableTransaction BuildSpendingTransaction(const CScript& scriptSig, const CScriptWitness& scriptWitness, const CMutableTransaction& txCredit)
{
    CMutableTransaction txSpend;
    txSpend.nVersion = 1;
    txSpend.nLockTime = 0;
    txSpend.vin.resize(1);
    txSpend.vout.resize(1);
    txSpend.wit.vtxinwit.resize(1);
    txSpend.wit.vtxinwit[0].scriptWitness = scriptWitness;
    txSpend.vin[0].prevout.hash = txCredit.GetHash();
    txSpend.vin[0].prevout.n = 0;
    txSpend.vin[0].scriptSig = scriptSig;
    txSpend.vin[0].nSequence = CTxIn::SEQUENCE_FINAL;
    txSpend.vout[0].scriptPubKey = CScript();
    txSpend.vout[0].nValue = txCredit.vout[0].nValue;

    return txSpend;
}

void DoTest(const CScript& scriptPubKey, const CScript& scriptSig, const CScriptWitness& scriptWitness, int flags, const std::string& message, int scriptError, CAmount nValue = 0)
{
    bool expect = (scriptError == SCRIPT_ERR_OK);
    if (flags & SCRIPT_VERIFY_CLEANSTACK) {
        flags |= SCRIPT_VERIFY_P2SH;
        flags |= SCRIPT_VERIFY_WITNESS;
    }
    ScriptError err;
    CMutableTransaction txCredit = BuildCreditingTransaction(scriptPubKey, nValue);
    CMutableTransaction tx = BuildSpendingTransaction(scriptSig, scriptWitness, txCredit);
    CMutableTransaction tx2 = tx;
    BOOST_CHECK_MESSAGE(VerifyScript(scriptSig, scriptPubKey, &scriptWitness, flags, MutableTransactionSignatureChecker(&tx, 0, txCredit.vout[0].nValue), &err) == expect, message);
    BOOST_CHECK_MESSAGE(err == scriptError, std::string(FormatScriptError(err)) + " where " + std::string(FormatScriptError((ScriptError_t)scriptError)) + " expected: " + message);
#if defined(HAVE_CONSENSUS_LIB)
    CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
    stream << tx2;
    if (flags & bitcoinconsensus_SCRIPT_FLAGS_VERIFY_WITNESS) {
        BOOST_CHECK_MESSAGE(bitcoinconsensus_verify_script_with_amount(begin_ptr(scriptPubKey), scriptPubKey.size(), txCredit.vout[0].nValue, (const unsigned char*)&stream[0], stream.size(), 0, flags, NULL) == expect, message);
    } else {
        BOOST_CHECK_MESSAGE(bitcoinconsensus_verify_script_with_amount(begin_ptr(scriptPubKey), scriptPubKey.size(), 0, (const unsigned char*)&stream[0], stream.size(), 0, flags, NULL) == expect, message);
        BOOST_CHECK_MESSAGE(bitcoinconsensus_verify_script(begin_ptr(scriptPubKey), scriptPubKey.size(), (const unsigned char*)&stream[0], stream.size(), 0, flags, NULL) == expect,message);
    }
#endif
}

void static NegateSignatureS(std::vector<unsigned char>& vchSig) {
    // Parse the signature.
    std::vector<unsigned char> r, s;
    r = std::vector<unsigned char>(vchSig.begin() + 4, vchSig.begin() + 4 + vchSig[3]);
    s = std::vector<unsigned char>(vchSig.begin() + 6 + vchSig[3], vchSig.begin() + 6 + vchSig[3] + vchSig[5 + vchSig[3]]);

    // Really ugly to implement mod-n negation here, but it would be feature creep to expose such functionality from libsecp256k1.
    static const unsigned char order[33] = {
        0x00,
        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE,
        0xBA, 0xAE, 0xDC, 0xE6, 0xAF, 0x48, 0xA0, 0x3B,
        0xBF, 0xD2, 0x5E, 0x8C, 0xD0, 0x36, 0x41, 0x41
    };
    while (s.size() < 33) {
        s.insert(s.begin(), 0x00);
    }
    int carry = 0;
    for (int p = 32; p >= 1; p--) {
        int n = (int)order[p] - s[p] - carry;
        s[p] = (n + 256) & 0xFF;
        carry = (n < 0);
    }
    assert(carry == 0);
    if (s.size() > 1 && s[0] == 0 && s[1] < 0x80) {
        s.erase(s.begin());
    }

    // Reconstruct the signature.
    vchSig.clear();
    vchSig.push_back(0x30);
    vchSig.push_back(4 + r.size() + s.size());
    vchSig.push_back(0x02);
    vchSig.push_back(r.size());
    vchSig.insert(vchSig.end(), r.begin(), r.end());
    vchSig.push_back(0x02);
    vchSig.push_back(s.size());
    vchSig.insert(vchSig.end(), s.begin(), s.end());
}

namespace
{
const unsigned char vchKey0[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
const unsigned char vchKey1[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0};
const unsigned char vchKey2[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0};

struct KeyData
{
    CKey key0, key0C, key1, key1C, key2, key2C;
    CPubKey pubkey0, pubkey0C, pubkey0H;
    CPubKey pubkey1, pubkey1C;
    CPubKey pubkey2, pubkey2C;

    KeyData()
    {

        key0.Set(vchKey0, vchKey0 + 32, false);
        key0C.Set(vchKey0, vchKey0 + 32, true);
        pubkey0 = key0.GetPubKey();
        pubkey0H = key0.GetPubKey();
        pubkey0C = key0C.GetPubKey();
        *const_cast<unsigned char*>(&pubkey0H[0]) = 0x06 | (pubkey0H[64] & 1);

        key1.Set(vchKey1, vchKey1 + 32, false);
        key1C.Set(vchKey1, vchKey1 + 32, true);
        pubkey1 = key1.GetPubKey();
        pubkey1C = key1C.GetPubKey();

        key2.Set(vchKey2, vchKey2 + 32, false);
        key2C.Set(vchKey2, vchKey2 + 32, true);
        pubkey2 = key2.GetPubKey();
        pubkey2C = key2C.GetPubKey();
    }
};

enum WitnessMode {
    WITNESS_NONE,
    WITNESS_PKH,
    WITNESS_SH
};

class TestBuilder
{
private:
    //! Actually executed script
    CScript script;
    //! The P2SH redeemscript
    CScript redeemscript;
    //! The Witness embedded script
    CScript witscript;
    CScriptWitness scriptWitness;
    CTransaction creditTx;
    CMutableTransaction spendTx;
    bool havePush;
    std::vector<unsigned char> push;
    std::string comment;
    int flags;
    int scriptError;
    CAmount nValue;

    void DoPush()
    {
        if (havePush) {
            spendTx.vin[0].scriptSig << push;
            havePush = false;
        }
    }

    void DoPush(const std::vector<unsigned char>& data)
    {
         DoPush();
         push = data;
         havePush = true;
    }

public:
    TestBuilder(const CScript& script_, const std::string& comment_, int flags_, bool P2SH = false, WitnessMode wm = WITNESS_NONE, int witnessversion = 0, CAmount nValue_ = 0) : script(script_), havePush(false), comment(comment_), flags(flags_), scriptError(SCRIPT_ERR_OK), nValue(nValue_)
    {
        CScript scriptPubKey = script;
        if (wm == WITNESS_PKH) {
            uint160 hash;
            CHash160().Write(&script[1], script.size() - 1).Finalize(hash.begin());
            script = CScript() << OP_DUP << OP_HASH160 << ToByteVector(hash) << OP_EQUALVERIFY << OP_CHECKSIG;
            scriptPubKey = CScript() << witnessversion << ToByteVector(hash);
        } else if (wm == WITNESS_SH) {
            witscript = scriptPubKey;
            uint256 hash;
            CSHA256().Write(&witscript[0], witscript.size()).Finalize(hash.begin());
            scriptPubKey = CScript() << witnessversion << ToByteVector(hash);
        }
        if (P2SH) {
            redeemscript = scriptPubKey;
            scriptPubKey = CScript() << OP_HASH160 << ToByteVector(CScriptID(redeemscript)) << OP_EQUAL;
        }
        creditTx = BuildCreditingTransaction(scriptPubKey, nValue);
        spendTx = BuildSpendingTransaction(CScript(), CScriptWitness(), creditTx);
    }

    TestBuilder& ScriptError(ScriptError_t err)
    {
        scriptError = err;
        return *this;
    }

    TestBuilder& Add(const CScript& _script)
    {
        DoPush();
        spendTx.vin[0].scriptSig += _script;
        return *this;
    }

    TestBuilder& Num(int num)
    {
        DoPush();
        spendTx.vin[0].scriptSig << num;
        return *this;
    }

    TestBuilder& Push(const std::string& hex)
    {
        DoPush(ParseHex(hex));
        return *this;
    }

    TestBuilder& Push(const CScript& _script) {
         DoPush(std::vector<unsigned char>(_script.begin(), _script.end()));
        return *this;
    }

    TestBuilder& PushSig(const CKey& key, int nHashType = SIGHASH_ALL, unsigned int lenR = 32, unsigned int lenS = 32, SigVersion sigversion = SIGVERSION_BASE, CAmount amount = 0)
    {
        uint256 hash = SignatureHash(script, spendTx, 0, nHashType, amount, sigversion);
        std::vector<unsigned char> vchSig, r, s;
        uint32_t iter = 0;
        do {
            key.Sign(hash, vchSig, iter++);
            if ((lenS == 33) != (vchSig[5 + vchSig[3]] == 33)) {
                NegateSignatureS(vchSig);
            }
            r = std::vector<unsigned char>(vchSig.begin() + 4, vchSig.begin() + 4 + vchSig[3]);
            s = std::vector<unsigned char>(vchSig.begin() + 6 + vchSig[3], vchSig.begin() + 6 + vchSig[3] + vchSig[5 + vchSig[3]]);
        } while (lenR != r.size() || lenS != s.size());
        vchSig.push_back(static_cast<unsigned char>(nHashType));
        DoPush(vchSig);
        return *this;
    }

    TestBuilder& PushWitSig(const CKey& key, CAmount amount = -1, int nHashType = SIGHASH_ALL, unsigned int lenR = 32, unsigned int lenS = 32, SigVersion sigversion = SIGVERSION_WITNESS_V0)
    {
        if (amount == -1)
            amount = nValue;
        return PushSig(key, nHashType, lenR, lenS, sigversion, amount).AsWit();
    }

    TestBuilder& Push(const CPubKey& pubkey)
    {
        DoPush(std::vector<unsigned char>(pubkey.begin(), pubkey.end()));
        return *this;
    }

    TestBuilder& PushRedeem()
    {
        DoPush(std::vector<unsigned char>(redeemscript.begin(), redeemscript.end()));
        return *this;
    }

    TestBuilder& PushWitRedeem()
    {
        DoPush(std::vector<unsigned char>(witscript.begin(), witscript.end()));
        return AsWit();
    }

    TestBuilder& EditPush(unsigned int pos, const std::string& hexin, const std::string& hexout)
    {
        assert(havePush);
        std::vector<unsigned char> datain = ParseHex(hexin);
        std::vector<unsigned char> dataout = ParseHex(hexout);
        assert(pos + datain.size() <= push.size());
        BOOST_CHECK_MESSAGE(std::vector<unsigned char>(push.begin() + pos, push.begin() + pos + datain.size()) == datain, comment);
        push.erase(push.begin() + pos, push.begin() + pos + datain.size());
        push.insert(push.begin() + pos, dataout.begin(), dataout.end());
        return *this;
    }

    TestBuilder& DamagePush(unsigned int pos)
    {
        assert(havePush);
        assert(pos < push.size());
        push[pos] ^= 1;
        return *this;
    }

    TestBuilder& Test()
    {
        TestBuilder copy = *this; // Make a copy so we can rollback the push.
        DoPush();
        DoTest(creditTx.vout[0].scriptPubKey, spendTx.vin[0].scriptSig, scriptWitness, flags, comment, scriptError, nValue);
        *this = copy;
        return *this;
    }

    TestBuilder& AsWit()
    {
        assert(havePush);
        scriptWitness.stack.push_back(push);
        havePush = false;
        return *this;
    }

    UniValue GetJSON()
    {
        DoPush();
        UniValue array(UniValue::VARR);
        if (!scriptWitness.stack.empty()) {
            UniValue wit(UniValue::VARR);
            for (unsigned i = 0; i < scriptWitness.stack.size(); i++) {
                wit.push_back(HexStr(scriptWitness.stack[i]));
            }
            wit.push_back(ValueFromAmount(nValue));
            array.push_back(wit);
        }
        array.push_back(FormatScript(spendTx.vin[0].scriptSig));
        array.push_back(FormatScript(creditTx.vout[0].scriptPubKey));
        array.push_back(FormatScriptFlags(flags));
        array.push_back(FormatScriptError((ScriptError_t)scriptError));
        array.push_back(comment);
        return array;
    }

    std::string GetComment()
    {
        return comment;
    }

    const CScript& GetScriptPubKey()
    {
        return creditTx.vout[0].scriptPubKey;
    }
};

std::string JSONPrettyPrint(const UniValue& univalue)
{
    std::string ret = univalue.write(4);
    // Workaround for libunivalue pretty printer, which puts a space between comma's and newlines
    size_t pos = 0;
    while ((pos = ret.find(" \n", pos)) != std::string::npos) {
        ret.replace(pos, 2, "\n");
        pos++;
    }
    return ret;
}
}

BOOST_AUTO_TEST_CASE(script_build)
{
    const KeyData keys;

    std::vector<TestBuilder> tests;

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "P2PK", 0
                               ).PushSig(keys.key0));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "P2PK, bad sig", 0
                               ).PushSig(keys.key0).DamagePush(10).ScriptError(SCRIPT_ERR_EVAL_FALSE));

    tests.push_back(TestBuilder(CScript() << OP_DUP << OP_HASH160 << ToByteVector(keys.pubkey1C.GetID()) << OP_EQUALVERIFY << OP_CHECKSIG,
                                "P2PKH", 0
                               ).PushSig(keys.key1).Push(keys.pubkey1C));
    tests.push_back(TestBuilder(CScript() << OP_DUP << OP_HASH160 << ToByteVector(keys.pubkey2C.GetID()) << OP_EQUALVERIFY << OP_CHECKSIG,
                                "P2PKH, bad pubkey", 0
                               ).PushSig(keys.key2).Push(keys.pubkey2C).DamagePush(5).ScriptError(SCRIPT_ERR_EQUALVERIFY));

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG,
                                "P2PK anyonecanpay", 0
                               ).PushSig(keys.key1, SIGHASH_ALL | SIGHASH_ANYONECANPAY));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG,
                                "P2PK anyonecanpay marked with normal hashtype", 0
                               ).PushSig(keys.key1, SIGHASH_ALL | SIGHASH_ANYONECANPAY).EditPush(70, "81", "01").ScriptError(SCRIPT_ERR_EVAL_FALSE));

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0C) << OP_CHECKSIG,
                                "P2SH(P2PK)", SCRIPT_VERIFY_P2SH, true
                               ).PushSig(keys.key0).PushRedeem());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0C) << OP_CHECKSIG,
                                "P2SH(P2PK), bad redeemscript", SCRIPT_VERIFY_P2SH, true
                               ).PushSig(keys.key0).PushRedeem().DamagePush(10).ScriptError(SCRIPT_ERR_EVAL_FALSE));
    
    tests.push_back(TestBuilder(CScript() << OP_DUP << OP_HASH160 << ToByteVector(keys.pubkey0.GetID()) << OP_EQUALVERIFY << OP_CHECKSIG,
                                "P2SH(P2PKH)", SCRIPT_VERIFY_P2SH, true
                               ).PushSig(keys.key0).Push(keys.pubkey0).PushRedeem());
    tests.push_back(TestBuilder(CScript() << OP_DUP << OP_HASH160 << ToByteVector(keys.pubkey1.GetID()) << OP_EQUALVERIFY << OP_CHECKSIG,
                                "P2SH(P2PKH), bad sig but no VERIFY_P2SH", 0, true
                               ).PushSig(keys.key0).DamagePush(10).PushRedeem());
    tests.push_back(TestBuilder(CScript() << OP_DUP << OP_HASH160 << ToByteVector(keys.pubkey1.GetID()) << OP_EQUALVERIFY << OP_CHECKSIG,
                                "P2SH(P2PKH), bad sig", SCRIPT_VERIFY_P2SH, true
                               ).PushSig(keys.key0).DamagePush(10).PushRedeem().ScriptError(SCRIPT_ERR_EQUALVERIFY));

    tests.push_back(TestBuilder(CScript() << OP_3 << ToByteVector(keys.pubkey0C) << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_3 << OP_CHECKMULTISIG,
                                "3-of-3", 0
                               ).Num(0).PushSig(keys.key0).PushSig(keys.key1).PushSig(keys.key2));
    tests.push_back(TestBuilder(CScript() << OP_3 << ToByteVector(keys.pubkey0C) << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_3 << OP_CHECKMULTISIG,
                                "3-of-3, 2 sigs", 0
                               ).Num(0).PushSig(keys.key0).PushSig(keys.key1).Num(0).ScriptError(SCRIPT_ERR_EVAL_FALSE));

    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey0C) << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_3 << OP_CHECKMULTISIG,
                                "P2SH(2-of-3)", SCRIPT_VERIFY_P2SH, true
                               ).Num(0).PushSig(keys.key1).PushSig(keys.key2).PushRedeem());
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey0C) << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_3 << OP_CHECKMULTISIG,
                                "P2SH(2-of-3), 1 sig", SCRIPT_VERIFY_P2SH, true
                               ).Num(0).PushSig(keys.key1).Num(0).PushRedeem().ScriptError(SCRIPT_ERR_EVAL_FALSE));

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "P2PK with too much R padding but no DERSIG", 0
                               ).PushSig(keys.key1, SIGHASH_ALL, 31, 32).EditPush(1, "43021F", "44022000"));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "P2PK with too much R padding", SCRIPT_VERIFY_DERSIG
                               ).PushSig(keys.key1, SIGHASH_ALL, 31, 32).EditPush(1, "43021F", "44022000").ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "P2PK with too much S padding but no DERSIG", 0
                               ).PushSig(keys.key1, SIGHASH_ALL).EditPush(1, "44", "45").EditPush(37, "20", "2100"));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "P2PK with too much S padding", SCRIPT_VERIFY_DERSIG
                               ).PushSig(keys.key1, SIGHASH_ALL).EditPush(1, "44", "45").EditPush(37, "20", "2100").ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "P2PK with too little R padding but no DERSIG", 0
                               ).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220"));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "P2PK with too little R padding", SCRIPT_VERIFY_DERSIG
                               ).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with bad sig with too much R padding but no DERSIG", 0
                               ).PushSig(keys.key2, SIGHASH_ALL, 31, 32).EditPush(1, "43021F", "44022000").DamagePush(10));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with bad sig with too much R padding", SCRIPT_VERIFY_DERSIG
                               ).PushSig(keys.key2, SIGHASH_ALL, 31, 32).EditPush(1, "43021F", "44022000").DamagePush(10).ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with too much R padding but no DERSIG", 0
                               ).PushSig(keys.key2, SIGHASH_ALL, 31, 32).EditPush(1, "43021F", "44022000").ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with too much R padding", SCRIPT_VERIFY_DERSIG
                               ).PushSig(keys.key2, SIGHASH_ALL, 31, 32).EditPush(1, "43021F", "44022000").ScriptError(SCRIPT_ERR_SIG_DER));

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "BIP66 example 1, without DERSIG", 0
                               ).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220"));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "BIP66 example 1, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
                                "BIP66 example 2, without DERSIG", 0
                               ).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
                                "BIP66 example 2, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "BIP66 example 3, without DERSIG", 0
                               ).Num(0).ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "BIP66 example 3, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(0).ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
                                "BIP66 example 4, without DERSIG", 0
                               ).Num(0));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
                                "BIP66 example 4, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(0));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "BIP66 example 5, without DERSIG", 0
                               ).Num(1).ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                                "BIP66 example 5, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(1).ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
                                "BIP66 example 6, without DERSIG", 0
                               ).Num(1));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
                                "BIP66 example 6, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(1).ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG,
                                "BIP66 example 7, without DERSIG", 0
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").PushSig(keys.key2));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG,
                                "BIP66 example 7, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").PushSig(keys.key2).ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG << OP_NOT,
                                "BIP66 example 8, without DERSIG", 0
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").PushSig(keys.key2).ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG << OP_NOT,
                                "BIP66 example 8, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").PushSig(keys.key2).ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG,
                                "BIP66 example 9, without DERSIG", 0
                               ).Num(0).Num(0).PushSig(keys.key2, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG,
                                "BIP66 example 9, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(0).Num(0).PushSig(keys.key2, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG << OP_NOT,
                                "BIP66 example 10, without DERSIG", 0
                               ).Num(0).Num(0).PushSig(keys.key2, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220"));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG << OP_NOT,
                                "BIP66 example 10, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(0).Num(0).PushSig(keys.key2, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").ScriptError(SCRIPT_ERR_SIG_DER));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG,
                                "BIP66 example 11, without DERSIG", 0
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").Num(0).ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG,
                                "BIP66 example 11, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").Num(0).ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG << OP_NOT,
                                "BIP66 example 12, without DERSIG", 0
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").Num(0));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_2 << OP_CHECKMULTISIG << OP_NOT,
                                "BIP66 example 12, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL, 33, 32).EditPush(1, "45022100", "440220").Num(0));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG,
                                "P2PK with multi-byte hashtype, without DERSIG", 0
                               ).PushSig(keys.key2, SIGHASH_ALL).EditPush(70, "01", "0101"));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG,
                                "P2PK with multi-byte hashtype, with DERSIG", SCRIPT_VERIFY_DERSIG
                               ).PushSig(keys.key2, SIGHASH_ALL).EditPush(70, "01", "0101").ScriptError(SCRIPT_ERR_SIG_DER));

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG,
                                "P2PK with high S but no LOW_S", 0
                               ).PushSig(keys.key2, SIGHASH_ALL, 32, 33));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG,
                                "P2PK with high S", SCRIPT_VERIFY_LOW_S
                               ).PushSig(keys.key2, SIGHASH_ALL, 32, 33).ScriptError(SCRIPT_ERR_SIG_HIGH_S));

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0H) << OP_CHECKSIG,
                                "P2PK with hybrid pubkey but no STRICTENC", 0
                               ).PushSig(keys.key0, SIGHASH_ALL));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0H) << OP_CHECKSIG,
                                "P2PK with hybrid pubkey", SCRIPT_VERIFY_STRICTENC
                               ).PushSig(keys.key0, SIGHASH_ALL).ScriptError(SCRIPT_ERR_PUBKEYTYPE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0H) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with hybrid pubkey but no STRICTENC", 0
                               ).PushSig(keys.key0, SIGHASH_ALL).ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0H) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with hybrid pubkey", SCRIPT_VERIFY_STRICTENC
                               ).PushSig(keys.key0, SIGHASH_ALL).ScriptError(SCRIPT_ERR_PUBKEYTYPE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0H) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with invalid hybrid pubkey but no STRICTENC", 0
                               ).PushSig(keys.key0, SIGHASH_ALL).DamagePush(10));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0H) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with invalid hybrid pubkey", SCRIPT_VERIFY_STRICTENC
                               ).PushSig(keys.key0, SIGHASH_ALL).DamagePush(10).ScriptError(SCRIPT_ERR_PUBKEYTYPE));
    tests.push_back(TestBuilder(CScript() << OP_1 << ToByteVector(keys.pubkey0H) << ToByteVector(keys.pubkey1C) << OP_2 << OP_CHECKMULTISIG,
                                "1-of-2 with the second 1 hybrid pubkey and no STRICTENC", 0
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL));
    tests.push_back(TestBuilder(CScript() << OP_1 << ToByteVector(keys.pubkey0H) << ToByteVector(keys.pubkey1C) << OP_2 << OP_CHECKMULTISIG,
                                "1-of-2 with the second 1 hybrid pubkey", SCRIPT_VERIFY_STRICTENC
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL));
    tests.push_back(TestBuilder(CScript() << OP_1 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey0H) << OP_2 << OP_CHECKMULTISIG,
                                "1-of-2 with the first 1 hybrid pubkey", SCRIPT_VERIFY_STRICTENC
                               ).Num(0).PushSig(keys.key1, SIGHASH_ALL).ScriptError(SCRIPT_ERR_PUBKEYTYPE));

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG,
                                "P2PK with undefined hashtype but no STRICTENC", 0
                               ).PushSig(keys.key1, 5));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG,
                                "P2PK with undefined hashtype", SCRIPT_VERIFY_STRICTENC
                               ).PushSig(keys.key1, 5).ScriptError(SCRIPT_ERR_SIG_HASHTYPE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with invalid sig and undefined hashtype but no STRICTENC", 0
                               ).PushSig(keys.key1, 5).DamagePush(10));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG << OP_NOT,
                                "P2PK NOT with invalid sig and undefined hashtype", SCRIPT_VERIFY_STRICTENC
                               ).PushSig(keys.key1, 5).DamagePush(10).ScriptError(SCRIPT_ERR_SIG_HASHTYPE));

    tests.push_back(TestBuilder(CScript() << OP_3 << ToByteVector(keys.pubkey0C) << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_3 << OP_CHECKMULTISIG,
                                "3-of-3 with nonzero dummy but no NULLDUMMY", 0
                               ).Num(1).PushSig(keys.key0).PushSig(keys.key1).PushSig(keys.key2));
    tests.push_back(TestBuilder(CScript() << OP_3 << ToByteVector(keys.pubkey0C) << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_3 << OP_CHECKMULTISIG,
                                "3-of-3 with nonzero dummy", SCRIPT_VERIFY_NULLDUMMY
                               ).Num(1).PushSig(keys.key0).PushSig(keys.key1).PushSig(keys.key2).ScriptError(SCRIPT_ERR_SIG_NULLDUMMY));
    tests.push_back(TestBuilder(CScript() << OP_3 << ToByteVector(keys.pubkey0C) << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_3 << OP_CHECKMULTISIG << OP_NOT,
                                "3-of-3 NOT with invalid sig and nonzero dummy but no NULLDUMMY", 0
                               ).Num(1).PushSig(keys.key0).PushSig(keys.key1).PushSig(keys.key2).DamagePush(10));
    tests.push_back(TestBuilder(CScript() << OP_3 << ToByteVector(keys.pubkey0C) << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey2C) << OP_3 << OP_CHECKMULTISIG << OP_NOT,
                                "3-of-3 NOT with invalid sig with nonzero dummy", SCRIPT_VERIFY_NULLDUMMY
                               ).Num(1).PushSig(keys.key0).PushSig(keys.key1).PushSig(keys.key2).DamagePush(10).ScriptError(SCRIPT_ERR_SIG_NULLDUMMY));

    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey1C) << OP_2 << OP_CHECKMULTISIG,
                                "2-of-2 with two identical keys and sigs pushed using OP_DUP but no SIGPUSHONLY", 0
                               ).Num(0).PushSig(keys.key1).Add(CScript() << OP_DUP));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey1C) << OP_2 << OP_CHECKMULTISIG,
                                "2-of-2 with two identical keys and sigs pushed using OP_DUP", SCRIPT_VERIFY_SIGPUSHONLY
                               ).Num(0).PushSig(keys.key1).Add(CScript() << OP_DUP).ScriptError(SCRIPT_ERR_SIG_PUSHONLY));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG,
                                "P2SH(P2PK) with non-push scriptSig but no P2SH or SIGPUSHONLY", 0, true
                               ).PushSig(keys.key2).Add(CScript() << OP_NOP8).PushRedeem());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG,
                                "P2PK with non-push scriptSig but with P2SH validation", 0
                               ).PushSig(keys.key2).Add(CScript() << OP_NOP8));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG,
                                "P2SH(P2PK) with non-push scriptSig but no SIGPUSHONLY", SCRIPT_VERIFY_P2SH, true
                               ).PushSig(keys.key2).Add(CScript() << OP_NOP8).PushRedeem().ScriptError(SCRIPT_ERR_SIG_PUSHONLY));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG,
                                "P2SH(P2PK) with non-push scriptSig but not P2SH", SCRIPT_VERIFY_SIGPUSHONLY, true
                               ).PushSig(keys.key2).Add(CScript() << OP_NOP8).PushRedeem().ScriptError(SCRIPT_ERR_SIG_PUSHONLY));
    tests.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey1C) << OP_2 << OP_CHECKMULTISIG,
                                "2-of-2 with two identical keys and sigs pushed", SCRIPT_VERIFY_SIGPUSHONLY
                               ).Num(0).PushSig(keys.key1).PushSig(keys.key1));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "P2PK with unnecessary input but no CLEANSTACK", SCRIPT_VERIFY_P2SH
                               ).Num(11).PushSig(keys.key0));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "P2PK with unnecessary input", SCRIPT_VERIFY_CLEANSTACK | SCRIPT_VERIFY_P2SH
                               ).Num(11).PushSig(keys.key0).ScriptError(SCRIPT_ERR_CLEANSTACK));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "P2SH with unnecessary input but no CLEANSTACK", SCRIPT_VERIFY_P2SH, true
                               ).Num(11).PushSig(keys.key0).PushRedeem());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "P2SH with unnecessary input", SCRIPT_VERIFY_CLEANSTACK | SCRIPT_VERIFY_P2SH, true
                               ).Num(11).PushSig(keys.key0).PushRedeem().ScriptError(SCRIPT_ERR_CLEANSTACK));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "P2SH with CLEANSTACK", SCRIPT_VERIFY_CLEANSTACK | SCRIPT_VERIFY_P2SH, true
                               ).PushSig(keys.key0).PushRedeem());

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "Basic P2WSH", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_SH,
                                0, 1).PushWitSig(keys.key0).PushWitRedeem());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0),
                                "Basic P2WPKH", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_PKH,
                                0, 1).PushWitSig(keys.key0).Push(keys.pubkey0).AsWit());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "Basic P2SH(P2WSH)", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, true, WITNESS_SH,
                                0, 1).PushWitSig(keys.key0).PushWitRedeem().PushRedeem());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0),
                                "Basic P2SH(P2WPKH)", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, true, WITNESS_PKH,
                                0, 1).PushWitSig(keys.key0).Push(keys.pubkey0).AsWit().PushRedeem());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG,
                                "Basic P2WSH with the wrong key", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_SH
                               ).PushWitSig(keys.key0).PushWitRedeem().ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1),
                                "Basic P2WPKH with the wrong key", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_PKH
                               ).PushWitSig(keys.key0).Push(keys.pubkey1).AsWit().ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG,
                                "Basic P2SH(P2WSH) with the wrong key", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, true, WITNESS_SH
                               ).PushWitSig(keys.key0).PushWitRedeem().PushRedeem().ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1),
                                "Basic P2SH(P2WPKH) with the wrong key", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, true, WITNESS_PKH
                               ).PushWitSig(keys.key0).Push(keys.pubkey1).AsWit().PushRedeem().ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG,
                                "Basic P2WSH with the wrong key but no WITNESS", SCRIPT_VERIFY_P2SH, false, WITNESS_SH
                               ).PushWitSig(keys.key0).PushWitRedeem());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1),
                                "Basic P2WPKH with the wrong key but no WITNESS", SCRIPT_VERIFY_P2SH, false, WITNESS_PKH
                               ).PushWitSig(keys.key0).Push(keys.pubkey1).AsWit());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1) << OP_CHECKSIG,
                                "Basic P2SH(P2WSH) with the wrong key but no WITNESS", SCRIPT_VERIFY_P2SH, true, WITNESS_SH
                               ).PushWitSig(keys.key0).PushWitRedeem().PushRedeem());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1),
                                "Basic P2SH(P2WPKH) with the wrong key but no WITNESS", SCRIPT_VERIFY_P2SH, true, WITNESS_PKH
                               ).PushWitSig(keys.key0).Push(keys.pubkey1).AsWit().PushRedeem());
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "Basic P2WSH with wrong value", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_SH,
                                0, 0).PushWitSig(keys.key0, 1).PushWitRedeem().ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0),
                                "Basic P2WPKH with wrong value", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_PKH,
                                0, 0).PushWitSig(keys.key0, 1).Push(keys.pubkey0).AsWit().ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "Basic P2SH(P2WSH) with wrong value", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, true, WITNESS_SH,
                                0, 0).PushWitSig(keys.key0, 1).PushWitRedeem().PushRedeem().ScriptError(SCRIPT_ERR_EVAL_FALSE));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0),
                                "Basic P2SH(P2WPKH) with wrong value", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, true, WITNESS_PKH,
                                0, 0).PushWitSig(keys.key0, 1).Push(keys.pubkey0).AsWit().PushRedeem().ScriptError(SCRIPT_ERR_EVAL_FALSE));

    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0),
                                "P2WPKH with future witness version", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH |
                                SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM, false, WITNESS_PKH, 1
                               ).PushWitSig(keys.key0).Push(keys.pubkey0).AsWit().ScriptError(SCRIPT_ERR_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM));
    {
        CScript witscript = CScript() << ToByteVector(keys.pubkey0);
        uint256 hash;
        CSHA256().Write(&witscript[0], witscript.size()).Finalize(hash.begin());
        vector<unsigned char> hashBytes = ToByteVector(hash);
        hashBytes.pop_back();
        tests.push_back(TestBuilder(CScript() << OP_0 << hashBytes,
                                    "P2WPKH with wrong witness program length", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false
                                   ).PushWitSig(keys.key0).Push(keys.pubkey0).AsWit().ScriptError(SCRIPT_ERR_WITNESS_PROGRAM_WRONG_LENGTH));
    }
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "P2WSH with empty witness", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_SH
                               ).ScriptError(SCRIPT_ERR_WITNESS_PROGRAM_WITNESS_EMPTY));
    {
        CScript witscript = CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG;
        tests.push_back(TestBuilder(witscript,
                                    "P2WSH with witness program mismatch", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_SH
                                   ).PushWitSig(keys.key0).Push(witscript).DamagePush(0).AsWit().ScriptError(SCRIPT_ERR_WITNESS_PROGRAM_MISMATCH));
    }
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0),
                                "P2WPKH with witness program mismatch", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_PKH
                               ).PushWitSig(keys.key0).Push(keys.pubkey0).AsWit().Push("0").AsWit().ScriptError(SCRIPT_ERR_WITNESS_PROGRAM_MISMATCH));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0),
                                "P2WPKH with non-empty scriptSig", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, false, WITNESS_PKH
                               ).PushWitSig(keys.key0).Push(keys.pubkey0).AsWit().Num(11).ScriptError(SCRIPT_ERR_WITNESS_MALLEATED));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1),
                                "P2SH(P2WPKH) with superfluous push in scriptSig", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH, true, WITNESS_PKH
                               ).PushWitSig(keys.key0).Push(keys.pubkey1).AsWit().Num(11).PushRedeem().ScriptError(SCRIPT_ERR_WITNESS_MALLEATED_P2SH));
    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey0) << OP_CHECKSIG,
                                "P2PK with witness", SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH
                               ).PushSig(keys.key0).Push("0").AsWit().ScriptError(SCRIPT_ERR_WITNESS_UNEXPECTED));

    std::set<std::string> tests_set;

    {
        UniValue json_tests = read_json(std::string(json_tests::script_tests, json_tests::script_tests + sizeof(json_tests::script_tests)));

        for (unsigned int idx = 0; idx < json_tests.size(); idx++) {
            const UniValue& tv = json_tests[idx];
            tests_set.insert(JSONPrettyPrint(tv.get_array()));
        }
    }

    std::string strGen;

    BOOST_FOREACH(TestBuilder& test, tests) {
        test.Test();
        std::string str = JSONPrettyPrint(test.GetJSON());
#ifndef UPDATE_JSON_TESTS
        if (tests_set.count(str) == 0) {
            BOOST_CHECK_MESSAGE(false, "Missing auto script_valid test: " + test.GetComment());
        }
#endif
        strGen += str + ",\n";
    }

#ifdef UPDATE_JSON_TESTS
    FILE* file = fopen("script_tests.json.gen", "w");
    fputs(strGen.c_str(), file);
    fclose(file);
#endif
}

BOOST_AUTO_TEST_CASE(script_json_test)
{
    // Read tests from test/data/script_tests.json
    // Format is an array of arrays
    // Inner arrays are [ ["wit"..., nValue]?, "scriptSig", "scriptPubKey", "flags", "expected_scripterror" ]
    // ... where scriptSig and scriptPubKey are stringified
    // scripts.
    // If a witness is given, then the last value in the array should be the
    // amount (nValue) to use in the crediting tx
    UniValue tests = read_json(std::string(json_tests::script_tests, json_tests::script_tests + sizeof(json_tests::script_tests)));

    for (unsigned int idx = 0; idx < tests.size(); idx++) {
        UniValue test = tests[idx];
        string strTest = test.write();
        CScriptWitness witness;
        CAmount nValue = 0;
        unsigned int pos = 0;
        if (test.size() > 0 && test[pos].isArray()) {
            unsigned int i=0;
            for (i = 0; i < test[pos].size()-1; i++) {
                witness.stack.push_back(ParseHex(test[pos][i].get_str()));
            }
            nValue = AmountFromValue(test[pos][i]);
            pos++;
        }
        if (test.size() < 4 + pos) // Allow size > 3; extra stuff ignored (useful for comments)
        {
            if (test.size() != 1) {
                BOOST_ERROR("Bad test: " << strTest);
            }
            continue;
        }
        string scriptSigString = test[pos++].get_str();
        CScript scriptSig = ParseScript(scriptSigString);
        string scriptPubKeyString = test[pos++].get_str();
        CScript scriptPubKey = ParseScript(scriptPubKeyString);
        unsigned int scriptflags = ParseScriptFlags(test[pos++].get_str());
        int scriptError = ParseScriptError(test[pos++].get_str());

        DoTest(scriptPubKey, scriptSig, witness, scriptflags, strTest, scriptError, nValue);
    }
}

BOOST_AUTO_TEST_CASE(script_PushData)
{
    // Check that PUSHDATA1, PUSHDATA2, and PUSHDATA4 create the same value on
    // the stack as the 1-75 opcodes do.
    static const unsigned char direct[] = { 1, 0x5a };
    static const unsigned char pushdata1[] = { OP_PUSHDATA1, 1, 0x5a };
    static const unsigned char pushdata2[] = { OP_PUSHDATA2, 1, 0, 0x5a };
    static const unsigned char pushdata4[] = { OP_PUSHDATA4, 1, 0, 0, 0, 0x5a };

    ScriptError err;
    vector<vector<unsigned char> > directStack;
    BOOST_CHECK(EvalScript(directStack, CScript(&direct[0], &direct[sizeof(direct)]), SCRIPT_VERIFY_P2SH, BaseSignatureChecker(), SIGVERSION_BASE, &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));

    vector<vector<unsigned char> > pushdata1Stack;
    BOOST_CHECK(EvalScript(pushdata1Stack, CScript(&pushdata1[0], &pushdata1[sizeof(pushdata1)]), SCRIPT_VERIFY_P2SH, BaseSignatureChecker(), SIGVERSION_BASE, &err));
    BOOST_CHECK(pushdata1Stack == directStack);
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));

    vector<vector<unsigned char> > pushdata2Stack;
    BOOST_CHECK(EvalScript(pushdata2Stack, CScript(&pushdata2[0], &pushdata2[sizeof(pushdata2)]), SCRIPT_VERIFY_P2SH, BaseSignatureChecker(), SIGVERSION_BASE, &err));
    BOOST_CHECK(pushdata2Stack == directStack);
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));

    vector<vector<unsigned char> > pushdata4Stack;
    BOOST_CHECK(EvalScript(pushdata4Stack, CScript(&pushdata4[0], &pushdata4[sizeof(pushdata4)]), SCRIPT_VERIFY_P2SH, BaseSignatureChecker(), SIGVERSION_BASE, &err));
    BOOST_CHECK(pushdata4Stack == directStack);
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
}

CScript
sign_multisig(CScript scriptPubKey, std::vector<CKey> keys, CTransaction transaction)
{
    uint256 hash = SignatureHash(scriptPubKey, transaction, 0, SIGHASH_ALL, 0, SIGVERSION_BASE);

    CScript result;
    //
    // NOTE: CHECKMULTISIG has an unfortunate bug; it requires
    // one extra item on the stack, before the signatures.
    // Putting OP_0 on the stack is the workaround;
    // fixing the bug would mean splitting the block chain (old
    // clients would not accept new CHECKMULTISIG transactions,
    // and vice-versa)
    //
    result << OP_0;
    BOOST_FOREACH(const CKey &key, keys)
    {
        vector<unsigned char> vchSig;
        BOOST_CHECK(key.Sign(hash, vchSig));
        vchSig.push_back((unsigned char)SIGHASH_ALL);
        result << vchSig;
    }
    return result;
}
CScript
sign_multisig(CScript scriptPubKey, const CKey &key, CTransaction transaction)
{
    std::vector<CKey> keys;
    keys.push_back(key);
    return sign_multisig(scriptPubKey, keys, transaction);
}

BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG12)
{
    ScriptError err;
    CKey key1, key2, key3;
    key1.MakeNewKey(true);
    key2.MakeNewKey(false);
    key3.MakeNewKey(true);

    CScript scriptPubKey12;
    scriptPubKey12 << OP_1 << ToByteVector(key1.GetPubKey()) << ToByteVector(key2.GetPubKey()) << OP_2 << OP_CHECKMULTISIG;

    CMutableTransaction txFrom12 = BuildCreditingTransaction(scriptPubKey12);
    CMutableTransaction txTo12 = BuildSpendingTransaction(CScript(), CScriptWitness(), txFrom12);

    CScript goodsig1 = sign_multisig(scriptPubKey12, key1, txTo12);
    BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey12, NULL, flags, MutableTransactionSignatureChecker(&txTo12, 0, txFrom12.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
    txTo12.vout[0].nValue = 2;
    BOOST_CHECK(!VerifyScript(goodsig1, scriptPubKey12, NULL, flags, MutableTransactionSignatureChecker(&txTo12, 0, txFrom12.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));

    CScript goodsig2 = sign_multisig(scriptPubKey12, key2, txTo12);
    BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey12, NULL, flags, MutableTransactionSignatureChecker(&txTo12, 0, txFrom12.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));

    CScript badsig1 = sign_multisig(scriptPubKey12, key3, txTo12);
    BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey12, NULL, flags, MutableTransactionSignatureChecker(&txTo12, 0, txFrom12.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
}

BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG23)
{
    ScriptError err;
    CKey key1, key2, key3, key4;
    key1.MakeNewKey(true);
    key2.MakeNewKey(false);
    key3.MakeNewKey(true);
    key4.MakeNewKey(false);

    CScript scriptPubKey23;
    scriptPubKey23 << OP_2 << ToByteVector(key1.GetPubKey()) << ToByteVector(key2.GetPubKey()) << ToByteVector(key3.GetPubKey()) << OP_3 << OP_CHECKMULTISIG;

    CMutableTransaction txFrom23 = BuildCreditingTransaction(scriptPubKey23);
    CMutableTransaction txTo23 = BuildSpendingTransaction(CScript(), CScriptWitness(), txFrom23);

    std::vector<CKey> keys;
    keys.push_back(key1); keys.push_back(key2);
    CScript goodsig1 = sign_multisig(scriptPubKey23, keys, txTo23);
    BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey23, NULL, flags, MutableTransactionSignatureChecker(&txTo23, 0, txFrom23.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));

    keys.clear();
    keys.push_back(key1); keys.push_back(key3);
    CScript goodsig2 = sign_multisig(scriptPubKey23, keys, txTo23);
    BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey23, NULL, flags, MutableTransactionSignatureChecker(&txTo23, 0, txFrom23.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));

    keys.clear();
    keys.push_back(key2); keys.push_back(key3);
    CScript goodsig3 = sign_multisig(scriptPubKey23, keys, txTo23);
    BOOST_CHECK(VerifyScript(goodsig3, scriptPubKey23, NULL, flags, MutableTransactionSignatureChecker(&txTo23, 0, txFrom23.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));

    keys.clear();
    keys.push_back(key2); keys.push_back(key2); // Can't re-use sig
    CScript badsig1 = sign_multisig(scriptPubKey23, keys, txTo23);
    BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey23, NULL, flags, MutableTransactionSignatureChecker(&txTo23, 0, txFrom23.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));

    keys.clear();
    keys.push_back(key2); keys.push_back(key1); // sigs must be in correct order
    CScript badsig2 = sign_multisig(scriptPubKey23, keys, txTo23);
    BOOST_CHECK(!VerifyScript(badsig2, scriptPubKey23, NULL, flags, MutableTransactionSignatureChecker(&txTo23, 0, txFrom23.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));

    keys.clear();
    keys.push_back(key3); keys.push_back(key2); // sigs must be in correct order
    CScript badsig3 = sign_multisig(scriptPubKey23, keys, txTo23);
    BOOST_CHECK(!VerifyScript(badsig3, scriptPubKey23, NULL, flags, MutableTransactionSignatureChecker(&txTo23, 0, txFrom23.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));

    keys.clear();
    keys.push_back(key4); keys.push_back(key2); // sigs must match pubkeys
    CScript badsig4 = sign_multisig(scriptPubKey23, keys, txTo23);
    BOOST_CHECK(!VerifyScript(badsig4, scriptPubKey23, NULL, flags, MutableTransactionSignatureChecker(&txTo23, 0, txFrom23.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));

    keys.clear();
    keys.push_back(key1); keys.push_back(key4); // sigs must match pubkeys
    CScript badsig5 = sign_multisig(scriptPubKey23, keys, txTo23);
    BOOST_CHECK(!VerifyScript(badsig5, scriptPubKey23, NULL, flags, MutableTransactionSignatureChecker(&txTo23, 0, txFrom23.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));

    keys.clear(); // Must have signatures
    CScript badsig6 = sign_multisig(scriptPubKey23, keys, txTo23);
    BOOST_CHECK(!VerifyScript(badsig6, scriptPubKey23, NULL, flags, MutableTransactionSignatureChecker(&txTo23, 0, txFrom23.vout[0].nValue), &err));
    BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_INVALID_STACK_OPERATION, ScriptErrorString(err));
}

BOOST_AUTO_TEST_CASE(script_combineSigs)
{
    // Test the CombineSignatures function
    CAmount amount = 0;
    CBasicKeyStore keystore;
    vector<CKey> keys;
    vector<CPubKey> pubkeys;
    for (int i = 0; i < 3; i++)
    {
        CKey key;
        key.MakeNewKey(i%2 == 1);
        keys.push_back(key);
        pubkeys.push_back(key.GetPubKey());
        keystore.AddKey(key);
    }

    CMutableTransaction txFrom = BuildCreditingTransaction(GetScriptForDestination(keys[0].GetPubKey().GetID()));
    CMutableTransaction txTo = BuildSpendingTransaction(CScript(), CScriptWitness(), txFrom);
    CScript& scriptPubKey = txFrom.vout[0].scriptPubKey;
    CScript& scriptSig = txTo.vin[0].scriptSig;

    SignatureData empty;
    SignatureData combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), empty, empty);
    BOOST_CHECK(combined.scriptSig.empty());

    // Single signature case:
    SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL); // changes scriptSig
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(scriptSig), empty);
    BOOST_CHECK(combined.scriptSig == scriptSig);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), empty, SignatureData(scriptSig));
    BOOST_CHECK(combined.scriptSig == scriptSig);
    CScript scriptSigCopy = scriptSig;
    // Signing again will give a different, valid signature:
    SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(scriptSigCopy), SignatureData(scriptSig));
    BOOST_CHECK(combined.scriptSig == scriptSigCopy || combined.scriptSig == scriptSig);

    // P2SH, single-signature case:
    CScript pkSingle; pkSingle << ToByteVector(keys[0].GetPubKey()) << OP_CHECKSIG;
    keystore.AddCScript(pkSingle);
    scriptPubKey = GetScriptForDestination(CScriptID(pkSingle));
    SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(scriptSig), empty);
    BOOST_CHECK(combined.scriptSig == scriptSig);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), empty, SignatureData(scriptSig));
    BOOST_CHECK(combined.scriptSig == scriptSig);
    scriptSigCopy = scriptSig;
    SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(scriptSigCopy), SignatureData(scriptSig));
    BOOST_CHECK(combined.scriptSig == scriptSigCopy || combined.scriptSig == scriptSig);
    // dummy scriptSigCopy with placeholder, should always choose non-placeholder:
    scriptSigCopy = CScript() << OP_0 << std::vector<unsigned char>(pkSingle.begin(), pkSingle.end());
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(scriptSigCopy), SignatureData(scriptSig));
    BOOST_CHECK(combined.scriptSig == scriptSig);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(scriptSig), SignatureData(scriptSigCopy));
    BOOST_CHECK(combined.scriptSig == scriptSig);

    // Hardest case:  Multisig 2-of-3
    scriptPubKey = GetScriptForMultisig(2, pubkeys);
    keystore.AddCScript(scriptPubKey);
    SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(scriptSig), empty);
    BOOST_CHECK(combined.scriptSig == scriptSig);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), empty, SignatureData(scriptSig));
    BOOST_CHECK(combined.scriptSig == scriptSig);

    // A couple of partially-signed versions:
    vector<unsigned char> sig1;
    uint256 hash1 = SignatureHash(scriptPubKey, txTo, 0, SIGHASH_ALL, 0, SIGVERSION_BASE);
    BOOST_CHECK(keys[0].Sign(hash1, sig1));
    sig1.push_back(SIGHASH_ALL);
    vector<unsigned char> sig2;
    uint256 hash2 = SignatureHash(scriptPubKey, txTo, 0, SIGHASH_NONE, 0, SIGVERSION_BASE);
    BOOST_CHECK(keys[1].Sign(hash2, sig2));
    sig2.push_back(SIGHASH_NONE);
    vector<unsigned char> sig3;
    uint256 hash3 = SignatureHash(scriptPubKey, txTo, 0, SIGHASH_SINGLE, 0, SIGVERSION_BASE);
    BOOST_CHECK(keys[2].Sign(hash3, sig3));
    sig3.push_back(SIGHASH_SINGLE);

    // Not fussy about order (or even existence) of placeholders or signatures:
    CScript partial1a = CScript() << OP_0 << sig1 << OP_0;
    CScript partial1b = CScript() << OP_0 << OP_0 << sig1;
    CScript partial2a = CScript() << OP_0 << sig2;
    CScript partial2b = CScript() << sig2 << OP_0;
    CScript partial3a = CScript() << sig3;
    CScript partial3b = CScript() << OP_0 << OP_0 << sig3;
    CScript partial3c = CScript() << OP_0 << sig3 << OP_0;
    CScript complete12 = CScript() << OP_0 << sig1 << sig2;
    CScript complete13 = CScript() << OP_0 << sig1 << sig3;
    CScript complete23 = CScript() << OP_0 << sig2 << sig3;

    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(partial1a), SignatureData(partial1b));
    BOOST_CHECK(combined.scriptSig == partial1a);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(partial1a), SignatureData(partial2a));
    BOOST_CHECK(combined.scriptSig == complete12);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(partial2a), SignatureData(partial1a));
    BOOST_CHECK(combined.scriptSig == complete12);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(partial1b), SignatureData(partial2b));
    BOOST_CHECK(combined.scriptSig == complete12);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(partial3b), SignatureData(partial1b));
    BOOST_CHECK(combined.scriptSig == complete13);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(partial2a), SignatureData(partial3a));
    BOOST_CHECK(combined.scriptSig == complete23);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(partial3b), SignatureData(partial2b));
    BOOST_CHECK(combined.scriptSig == complete23);
    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), SignatureData(partial3b), SignatureData(partial3a));
    BOOST_CHECK(combined.scriptSig == partial3c);
}

BOOST_AUTO_TEST_CASE(script_standard_push)
{
    ScriptError err;
    for (int i=0; i<67000; i++) {
        CScript script;
        script << i;
        BOOST_CHECK_MESSAGE(script.IsPushOnly(), "Number " << i << " is not pure push.");
        BOOST_CHECK_MESSAGE(VerifyScript(script, CScript() << OP_1, NULL, SCRIPT_VERIFY_MINIMALDATA, BaseSignatureChecker(), &err), "Number " << i << " push is not minimal data.");
        BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
    }

    for (unsigned int i=0; i<=MAX_SCRIPT_ELEMENT_SIZE; i++) {
        std::vector<unsigned char> data(i, '\111');
        CScript script;
        script << data;
        BOOST_CHECK_MESSAGE(script.IsPushOnly(), "Length " << i << " is not pure push.");
        BOOST_CHECK_MESSAGE(VerifyScript(script, CScript() << OP_1, NULL, SCRIPT_VERIFY_MINIMALDATA, BaseSignatureChecker(), &err), "Length " << i << " push is not minimal data.");
        BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
    }
}

BOOST_AUTO_TEST_CASE(script_IsPushOnly_on_invalid_scripts)
{
    // IsPushOnly returns false when given a script containing only pushes that
    // are invalid due to truncation. IsPushOnly() is consensus critical
    // because P2SH evaluation uses it, although this specific behavior should
    // not be consensus critical as the P2SH evaluation would fail first due to
    // the invalid push. Still, it doesn't hurt to test it explicitly.
    static const unsigned char direct[] = { 1 };
    BOOST_CHECK(!CScript(direct, direct+sizeof(direct)).IsPushOnly());
}

BOOST_AUTO_TEST_CASE(script_GetScriptAsm)
{
    BOOST_CHECK_EQUAL("OP_CHECKLOCKTIMEVERIFY", ScriptToAsmStr(CScript() << OP_NOP2, true));
    BOOST_CHECK_EQUAL("OP_CHECKLOCKTIMEVERIFY", ScriptToAsmStr(CScript() << OP_CHECKLOCKTIMEVERIFY, true));
    BOOST_CHECK_EQUAL("OP_CHECKLOCKTIMEVERIFY", ScriptToAsmStr(CScript() << OP_NOP2));
    BOOST_CHECK_EQUAL("OP_CHECKLOCKTIMEVERIFY", ScriptToAsmStr(CScript() << OP_CHECKLOCKTIMEVERIFY));

    string derSig("304502207fa7a6d1e0ee81132a269ad84e68d695483745cde8b541e3bf630749894e342a022100c1f7ab20e13e22fb95281a870f3dcf38d782e53023ee313d741ad0cfbc0c5090");
    string pubKey("03b0da749730dc9b4b1f4a14d6902877a92541f5368778853d9c4a0cb7802dcfb2");
    vector<unsigned char> vchPubKey = ToByteVector(ParseHex(pubKey));

    BOOST_CHECK_EQUAL(derSig + "00 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "00")) << vchPubKey, true));
    BOOST_CHECK_EQUAL(derSig + "80 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "80")) << vchPubKey, true));
    BOOST_CHECK_EQUAL(derSig + "[ALL] " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "01")) << vchPubKey, true));
    BOOST_CHECK_EQUAL(derSig + "[NONE] " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "02")) << vchPubKey, true));
    BOOST_CHECK_EQUAL(derSig + "[SINGLE] " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "03")) << vchPubKey, true));
    BOOST_CHECK_EQUAL(derSig + "[ALL|ANYONECANPAY] " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "81")) << vchPubKey, true));
    BOOST_CHECK_EQUAL(derSig + "[NONE|ANYONECANPAY] " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "82")) << vchPubKey, true));
    BOOST_CHECK_EQUAL(derSig + "[SINGLE|ANYONECANPAY] " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "83")) << vchPubKey, true));

    BOOST_CHECK_EQUAL(derSig + "00 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "00")) << vchPubKey));
    BOOST_CHECK_EQUAL(derSig + "80 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "80")) << vchPubKey));
    BOOST_CHECK_EQUAL(derSig + "01 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "01")) << vchPubKey));
    BOOST_CHECK_EQUAL(derSig + "02 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "02")) << vchPubKey));
    BOOST_CHECK_EQUAL(derSig + "03 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "03")) << vchPubKey));
    BOOST_CHECK_EQUAL(derSig + "81 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "81")) << vchPubKey));
    BOOST_CHECK_EQUAL(derSig + "82 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "82")) << vchPubKey));
    BOOST_CHECK_EQUAL(derSig + "83 " + pubKey, ScriptToAsmStr(CScript() << ToByteVector(ParseHex(derSig + "83")) << vchPubKey));
}

static CScript
ScriptFromHex(const char* hex)
{
    std::vector<unsigned char> data = ParseHex(hex);
    return CScript(data.begin(), data.end());
}


BOOST_AUTO_TEST_CASE(script_FindAndDelete)
{
    // Exercise the FindAndDelete functionality
    CScript s;
    CScript d;
    CScript expect;

    s = CScript() << OP_1 << OP_2;
    d = CScript(); // delete nothing should be a no-op
    expect = s;
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 0);
    BOOST_CHECK(s == expect);

    s = CScript() << OP_1 << OP_2 << OP_3;
    d = CScript() << OP_2;
    expect = CScript() << OP_1 << OP_3;
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 1);
    BOOST_CHECK(s == expect);

    s = CScript() << OP_3 << OP_1 << OP_3 << OP_3 << OP_4 << OP_3;
    d = CScript() << OP_3;
    expect = CScript() << OP_1 << OP_4;
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 4);
    BOOST_CHECK(s == expect);

    s = ScriptFromHex("0302ff03"); // PUSH 0x02ff03 onto stack
    d = ScriptFromHex("0302ff03");
    expect = CScript();
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 1);
    BOOST_CHECK(s == expect);

    s = ScriptFromHex("0302ff030302ff03"); // PUSH 0x2ff03 PUSH 0x2ff03
    d = ScriptFromHex("0302ff03");
    expect = CScript();
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 2);
    BOOST_CHECK(s == expect);

    s = ScriptFromHex("0302ff030302ff03");
    d = ScriptFromHex("02");
    expect = s; // FindAndDelete matches entire opcodes
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 0);
    BOOST_CHECK(s == expect);

    s = ScriptFromHex("0302ff030302ff03");
    d = ScriptFromHex("ff");
    expect = s;
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 0);
    BOOST_CHECK(s == expect);

    // This is an odd edge case: strip of the push-three-bytes
    // prefix, leaving 02ff03 which is push-two-bytes:
    s = ScriptFromHex("0302ff030302ff03");
    d = ScriptFromHex("03");
    expect = CScript() << ParseHex("ff03") << ParseHex("ff03");
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 2);
    BOOST_CHECK(s == expect);

    // Byte sequence that spans multiple opcodes:
    s = ScriptFromHex("02feed5169"); // PUSH(0xfeed) OP_1 OP_VERIFY
    d = ScriptFromHex("feed51");
    expect = s;
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 0); // doesn't match 'inside' opcodes
    BOOST_CHECK(s == expect);

    s = ScriptFromHex("02feed5169"); // PUSH(0xfeed) OP_1 OP_VERIFY
    d = ScriptFromHex("02feed51");
    expect = ScriptFromHex("69");
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 1);
    BOOST_CHECK(s == expect);

    s = ScriptFromHex("516902feed5169");
    d = ScriptFromHex("feed51");
    expect = s;
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 0);
    BOOST_CHECK(s == expect);

    s = ScriptFromHex("516902feed5169");
    d = ScriptFromHex("02feed51");
    expect = ScriptFromHex("516969");
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 1);
    BOOST_CHECK(s == expect);

    s = CScript() << OP_0 << OP_0 << OP_1 << OP_1;
    d = CScript() << OP_0 << OP_1;
    expect = CScript() << OP_0 << OP_1; // FindAndDelete is single-pass
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 1);
    BOOST_CHECK(s == expect);

    s = CScript() << OP_0 << OP_0 << OP_1 << OP_0 << OP_1 << OP_1;
    d = CScript() << OP_0 << OP_1;
    expect = CScript() << OP_0 << OP_1; // FindAndDelete is single-pass
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 2);
    BOOST_CHECK(s == expect);

    // Another weird edge case:
    // End with invalid push (not enough data)...
    s = ScriptFromHex("0003feed");
    d = ScriptFromHex("03feed"); // ... can remove the invalid push
    expect = ScriptFromHex("00");
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 1);
    BOOST_CHECK(s == expect);

    s = ScriptFromHex("0003feed");
    d = ScriptFromHex("00");
    expect = ScriptFromHex("03feed");
    BOOST_CHECK_EQUAL(s.FindAndDelete(d), 1);
    BOOST_CHECK(s == expect);
}

BOOST_AUTO_TEST_SUITE_END()