package octez-proto-libs

  1. Overview
  2. Docs
Legend:
Page
Library
Module
Module type
Parameter
Class
Class type
Source

Source file environment_V3.ml

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
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
(* Copyright (c) 2020 Nomadic Labs. <contact@nomadic-labs.com>               *)
(* Copyright (c) 2020 Metastate AG <hello@metastate.dev>                     *)
(*                                                                           *)
(* Permission is hereby granted, free of charge, to any person obtaining a   *)
(* copy of this software and associated documentation files (the "Software"),*)
(* to deal in the Software without restriction, including without limitation *)
(* the rights to use, copy, modify, merge, publish, distribute, sublicense,  *)
(* and/or sell copies of the Software, and to permit persons to whom the     *)
(* Software is furnished to do so, subject to the following conditions:      *)
(*                                                                           *)
(* The above copyright notice and this permission notice shall be included   *)
(* in all copies or substantial portions of the Software.                    *)
(*                                                                           *)
(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL   *)
(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING   *)
(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER       *)
(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

open Environment_context
open Environment_protocol_T

module type T = sig
  include
    Tezos_protocol_environment_sigs.V3.T
      with type Format.formatter = Format.formatter
       and type 'a Data_encoding.t = 'a Data_encoding.t
       and type 'a Data_encoding.lazy_t = 'a Data_encoding.lazy_t
       and type 'a Lwt.t = 'a Lwt.t
       and type ('a, 'b) Pervasives.result = ('a, 'b) result
       and type Chain_id.t = Tezos_crypto.Hashed.Chain_id.t
       and type Block_hash.t = Tezos_crypto.Hashed.Block_hash.t
       and type Operation_hash.t = Tezos_crypto.Hashed.Operation_hash.t
       and type Operation_list_hash.t =
        Tezos_crypto.Hashed.Operation_list_hash.t
       and type Operation_list_list_hash.t =
        Tezos_crypto.Hashed.Operation_list_list_hash.t
       and type Context.t = Context.t
       and type Context.cache_key = Environment_context.Context.cache_key
       and type Context.cache_value = Environment_context.Context.cache_value
       and type Context_hash.t = Tezos_crypto.Hashed.Context_hash.t
       and type Context_hash.Version.t =
        Tezos_crypto.Hashed.Context_hash.Version.t
       and type Protocol_hash.t = Tezos_crypto.Hashed.Protocol_hash.t
       and type Time.t = Time.Protocol.t
       and type Operation.shell_header = Operation.shell_header
       and type Operation.t = Operation.t
       and type Block_header.shell_header = Block_header.shell_header
       and type Block_header.t = Block_header.t
       and type 'a RPC_directory.t = 'a Tezos_rpc.Directory.t
       and type Ed25519.Public_key_hash.t = Signature.Ed25519.Public_key_hash.t
       and type Ed25519.Public_key.t = Signature.Ed25519.Public_key.t
       and type Ed25519.t = Signature.Ed25519.t
       and type Secp256k1.Public_key_hash.t =
        Signature.Secp256k1.Public_key_hash.t
       and type Secp256k1.Public_key.t = Signature.Secp256k1.Public_key.t
       and type Secp256k1.t = Signature.Secp256k1.t
       and type P256.Public_key_hash.t = Signature.P256.Public_key_hash.t
       and type P256.Public_key.t = Signature.P256.Public_key.t
       and type P256.t = Signature.P256.t
       and type Signature.public_key_hash = Signature.V0.public_key_hash
       and type Signature.public_key = Signature.V0.public_key
       and type Signature.t = Signature.V0.t
       and type Signature.watermark = Signature.V0.watermark
       and type 'a Micheline.canonical = 'a Micheline.canonical
       and type Z.t = Z.t
       and type ('a, 'b) Micheline.node = ('a, 'b) Micheline.node
       and type Data_encoding.json_schema = Data_encoding.json_schema
       and type ('a, 'b) RPC_path.t = ('a, 'b) Tezos_rpc.Path.t
       and type RPC_service.meth = Tezos_rpc.Service.meth
       and type (+'m, 'pr, 'p, 'q, 'i, 'o) RPC_service.t =
        ('m, 'pr, 'p, 'q, 'i, 'o) Tezos_rpc.Service.t
       and type Error_monad.shell_tztrace = Error_monad.tztrace
       and type 'a Error_monad.shell_tzresult = ('a, Error_monad.tztrace) result
       and type Timelock.chest = Tezos_crypto.Timelock_legacy.chest
       and type Timelock.chest_key = Tezos_crypto.Timelock_legacy.chest_key
       and type Timelock.opening_result =
        Tezos_crypto.Timelock_legacy.opening_result
       and module Sapling = Tezos_sapling.Core.Validator_legacy

  type error += Ecoproto_error of Error_monad.error

  val wrap_tzerror : Error_monad.error -> error

  val wrap_tztrace : Error_monad.error Error_monad.trace -> error trace

  val wrap_tzresult : 'a Error_monad.tzresult -> 'a tzresult

  module Lift (P : Updater.PROTOCOL) :
    PROTOCOL
      with type block_header_data = P.block_header_data
       and type block_header_metadata = P.block_header_metadata
       and type block_header = P.block_header
       and type operation_data = P.operation_data
       and type operation_receipt = P.operation_receipt
       and type operation = P.operation
       and type validation_state = P.validation_state
       and type application_state = P.validation_state

  class ['chain, 'block] proto_rpc_context :
    Tezos_rpc.Context.t
    -> (unit, (unit * 'chain) * 'block) RPC_path.t
    -> ['chain * 'block] RPC_context.simple

  class ['block] proto_rpc_context_of_directory :
    ('block -> RPC_context.t)
    -> RPC_context.t RPC_directory.t
    -> ['block] RPC_context.simple
end

module Make (Param : sig
  val name : string
end)
() =
struct
  (* The protocol V3 only supports 64-bits architectures. We ensure this the
     hard way with a dynamic check. *)
  let () =
    match Sys.word_size with
    | 32 ->
        Printf.eprintf
          "FAILURE: Environment V3 does not support 32-bit architectures\n%!" ;
        Stdlib.exit 1
    | 64 -> ()
    | n ->
        Printf.eprintf
          "FAILURE: Unknown, unsupported architecture (%d bits)\n%!"
          n ;
        Stdlib.exit 1

  module CamlinternalFormatBasics = CamlinternalFormatBasics
  include Stdlib

  (* The modules provided in the [_struct.V3.M] pack are meant specifically to
     shadow modules from [Stdlib]/[Base]/etc. with backwards compatible
     versions. Thus we open the module, hiding the incompatible, newer modules.
  *)
  open Tezos_protocol_environment_structs.V3
  module Pervasives = Stdlib

  module Logging = struct
    type level = Internal_event.level =
      | Debug
      | Info
      | Notice
      | Warning
      | Error
      | Fatal

    let logging_function = ref None

    let name_colon_space = Param.name ^ ": "

    let null_formatter = Format.make_formatter (fun _ _ _ -> ()) (fun () -> ())

    let log (level : Internal_event.level) =
      match !logging_function with
      | None -> Format.ikfprintf ignore null_formatter
      | Some f -> Format.kasprintf (fun s -> f level (name_colon_space ^ s))

    let log_string (level : Internal_event.level) s =
      match !logging_function with
      | None -> ()
      | Some f -> f level (name_colon_space ^ s)
  end

  module Compare = Compare
  module Seq = Tezos_protocol_environment_structs.V3.Seq

  module List = struct
    include Tezos_error_monad.TzLwtreslib.List

    include Tezos_protocol_environment_structs.V3.Lwtreslib_list_combine
  end

  module Char = Char
  module Bytes = Bytes
  module Hex = Hex
  module String = String
  module Bits = Bits
  module TzEndian = TzEndian

  module Set = struct
    module type S =
      Tezos_protocol_environment_structs.V3.Replicated_signatures.Set.S
        with type 'a error_monad_trace := 'a Error_monad.trace

    module Make (Ord : Compare.COMPARABLE) : S with type elt = Ord.t =
      Tezos_error_monad.TzLwtreslib.Set.Make (Ord)
  end

  module Map = struct
    module type S =
      Tezos_protocol_environment_structs.V3.Replicated_signatures.Map.S
        with type 'a error_monad_trace := 'a Error_monad.trace

    module Make (Ord : Compare.COMPARABLE) : S with type key = Ord.t =
      Tezos_error_monad.TzLwtreslib.Map.Make (Ord)
  end

  module Int32 = Int32
  module Int64 = Int64
  module Format = Format
  module FallbackArray = FallbackArray

  let not_a_sys_exc next_classifier = function
    | Unix.Unix_error _ | UnixLabels.Unix_error _ | Sys_error _ -> false
    | e -> next_classifier e

  module Option = struct
    include Tezos_error_monad.TzLwtreslib.Option

    (* This as well as the catchers in [Result] and [Error_monad] are different
       from the ones in Lwtreslib/Error Monad in that they also hide the Unix
       and System errors. This is because, from the point-of-view of the
       protocol, these exceptions are too abstract and too indeterministic. *)
    let catch ?(catch_only = fun _ -> true) f =
      (* Note that [catch] also special-cases its own set of exceptions. *)
      catch ~catch_only:(not_a_sys_exc catch_only) f

    let catch_s ?(catch_only = fun _ -> true) f =
      catch_s ~catch_only:(not_a_sys_exc catch_only) f
  end

  module Result = struct
    include Tezos_error_monad.TzLwtreslib.Result

    let catch ?(catch_only = fun _ -> true) f =
      catch ~catch_only:(not_a_sys_exc catch_only) f

    let catch_f ?(catch_only = fun _ -> true) f =
      catch_f ~catch_only:(not_a_sys_exc catch_only) f

    let catch_s ?(catch_only = fun _ -> true) f =
      catch_s ~catch_only:(not_a_sys_exc catch_only) f
  end

  module Raw_hashes = struct
    let sha256 = Tezos_crypto.Hacl.Hash.SHA256.digest

    let sha512 = Tezos_crypto.Hacl.Hash.SHA512.digest

    let blake2b msg =
      Tezos_crypto.Blake2B.to_bytes (Tezos_crypto.Blake2B.hash_bytes [msg])

    let keccak256 msg = Tezos_crypto.Hacl.Hash.Keccak_256.digest msg

    let sha3_256 msg = Tezos_crypto.Hacl.Hash.SHA3_256.digest msg

    let sha3_512 msg = Tezos_crypto.Hacl.Hash.SHA3_512.digest msg
  end

  module Z = Z
  module Lwt = Lwt

  module Data_encoding = struct
    include Data_encoding

    type tag_size = [`Uint8 | `Uint16]

    let def name ?title ?description encoding =
      def (Param.name ^ "." ^ name) ?title ?description encoding
  end

  module Time = Time.Protocol
  module Bls12_381 = Bls12_381
  module Ed25519 = Signature.Ed25519
  module Secp256k1 = Signature.Secp256k1
  module P256 = Signature.P256
  module Signature = Signature.V0
  module Timelock = Tezos_crypto.Timelock_legacy

  module S = struct
    module type T = Tezos_base.S.T

    module type HASHABLE = Tezos_base.S.HASHABLE

    module type MINIMAL_HASH = Tezos_crypto.Intfs.MINIMAL_HASH

    module type B58_DATA = sig
      type t

      val to_b58check : t -> string

      val to_short_b58check : t -> string

      val of_b58check_exn : string -> t

      val of_b58check_opt : string -> t option

      type Tezos_crypto.Base58.data += Data of t

      val b58check_encoding : t Tezos_crypto.Base58.encoding
    end

    module type RAW_DATA = sig
      type t

      val size : int (* in bytes *)

      val to_bytes : t -> Bytes.t

      val of_bytes_opt : Bytes.t -> t option

      val of_bytes_exn : Bytes.t -> t
    end

    module type ENCODER = sig
      type t

      val encoding : t Data_encoding.t

      val rpc_arg : t Tezos_rpc.Arg.t
    end

    module type INDEXES_SET = sig
      include Set.S

      val random_elt : t -> elt

      val encoding : t Data_encoding.t
    end

    module type INDEXES_MAP = sig
      include Map.S

      val encoding : 'a Data_encoding.t -> 'a t Data_encoding.t
    end

    module type INDEXES = sig
      type t

      module Set : INDEXES_SET with type elt = t

      module Map : INDEXES_MAP with type key = t
    end

    module type HASH = sig
      include MINIMAL_HASH

      include RAW_DATA with type t := t

      include B58_DATA with type t := t

      include ENCODER with type t := t

      include INDEXES with type t := t
    end

    module type MERKLE_TREE = sig
      type elt

      include HASH

      val compute : elt list -> t

      val empty : t

      type path = Left of path * t | Right of t * path | Op

      val compute_path : elt list -> int -> path

      val check_path : path -> elt -> t * int

      val path_encoding : path Data_encoding.t
    end

    module type SIGNATURE_PUBLIC_KEY_HASH = sig
      type t

      val pp : Format.formatter -> t -> unit

      val pp_short : Format.formatter -> t -> unit

      include Compare.S with type t := t

      include RAW_DATA with type t := t

      include B58_DATA with type t := t

      include ENCODER with type t := t

      include INDEXES with type t := t

      val zero : t
    end

    module type SIGNATURE_PUBLIC_KEY = sig
      type t

      val pp : Format.formatter -> t -> unit

      include Compare.S with type t := t

      include B58_DATA with type t := t

      include ENCODER with type t := t

      type public_key_hash_t

      val hash : t -> public_key_hash_t

      val size : t -> int (* in bytes *)

      val of_bytes_without_validation : bytes -> t option
    end

    module type SIGNATURE = sig
      module Public_key_hash : SIGNATURE_PUBLIC_KEY_HASH

      module Public_key :
        SIGNATURE_PUBLIC_KEY with type public_key_hash_t := Public_key_hash.t

      type t

      val pp : Format.formatter -> t -> unit

      include RAW_DATA with type t := t

      include Compare.S with type t := t

      include B58_DATA with type t := t

      include ENCODER with type t := t

      val zero : t

      type watermark

      (** Check a signature *)
      val check : ?watermark:watermark -> Public_key.t -> t -> Bytes.t -> bool
    end

    module type FIELD = sig
      type t

      (** The order of the finite field *)
      val order : Z.t

      (** minimal number of bytes required to encode a value of the field. *)
      val size_in_bytes : int

      (** [check_bytes bs] returns [true] if [bs] is a correct byte
      representation of a field element *)
      val check_bytes : Bytes.t -> bool

      (** The neutral element for the addition *)
      val zero : t

      (** The neutral element for the multiplication *)
      val one : t

      (** [add a b] returns [a + b mod order] *)
      val add : t -> t -> t

      (** [mul a b] returns [a * b mod order] *)
      val mul : t -> t -> t

      (** [eq a b] returns [true] if [a = b mod order], else [false] *)
      val eq : t -> t -> bool

      (** [negate x] returns [-x mod order]. Equivalently, [negate x] returns the
      unique [y] such that [x + y mod order = 0]
      *)
      val negate : t -> t

      (** [inverse_opt x] returns [x^-1] if [x] is not [0] as an option, else [None] *)
      val inverse_opt : t -> t option

      (** [pow x n] returns [x^n] *)
      val pow : t -> Z.t -> t

      (** From a predefined bytes representation, construct a value t. It is not
      required that to_bytes [(Option.get (of_bytes_opt t)) = t]. By default, little endian encoding
      is used and the given element is modulo the prime order *)
      val of_bytes_opt : Bytes.t -> t option

      (** Convert the value t to a bytes representation which can be used for
      hashing for instance. It is not required that [Option.get (to_bytes
      (of_bytes_opt t)) = t]. By default, little endian encoding is used, and
      length of the resulting bytes may vary depending on the order.
      *)
      val to_bytes : t -> Bytes.t
    end

    (** Module type for the prime fields GF(p) *)
    module type PRIME_FIELD = sig
      include FIELD

      (** [of_z x] builds an element t from the Zarith element [x]. [mod order] is
      applied if [x >= order] or [x < 0]. *)
      val of_z : Z.t -> t

      (** [to_z x] builds a Zarith element, using the decimal representation.
      Arithmetic on the result can be done using the modular functions on
      integers *)
      val to_z : t -> Z.t
    end

    module type CURVE = sig
      (** The type of the element in the elliptic curve *)
      type t

      (** The size of a point representation, in bytes *)
      val size_in_bytes : int

      module Scalar : FIELD

      (** Check if a point, represented as a byte array, is on the curve **)
      val check_bytes : Bytes.t -> bool

      (** Attempt to construct a point from a byte array *)
      val of_bytes_opt : Bytes.t -> t option

      (** Return a representation in bytes *)
      val to_bytes : t -> Bytes.t

      (** Zero of the elliptic curve *)
      val zero : t

      (** A fixed generator of the elliptic curve *)
      val one : t

      (** Return the addition of two element *)
      val add : t -> t -> t

      (** Double the element *)
      val double : t -> t

      (** Return the opposite of the element *)
      val negate : t -> t

      (** Return [true] if the two elements are algebraically the same *)
      val eq : t -> t -> bool

      (** Multiply an element by a scalar *)
      val mul : t -> Scalar.t -> t
    end

    module type PAIRING = sig
      module Gt : FIELD

      module G1 : CURVE

      module G2 : CURVE

      val miller_loop : (G1.t * G2.t) list -> Gt.t

      val final_exponentiation_opt : Gt.t -> Gt.t option

      val pairing : G1.t -> G2.t -> Gt.t
    end
  end

  module Error_core = struct
    include
      Tezos_error_monad.Core_maker.Make
        (struct
          let id = Format.asprintf "proto.%s." Param.name
        end)
        (Tezos_protocol_environment_structs.V3.Error_monad_trace_eval)

    let error_encoding = Data_encoding.dynamic_size error_encoding
  end

  type error_category = Error_core.error_category

  type error += Ecoproto_error of Error_core.error

  module Wrapped_error_monad = struct
    type unwrapped = Error_core.error = ..

    include (
      Error_core :
        sig
          include
            Tezos_error_monad.Sig.CORE
              with type error := unwrapped
               and type error_category = error_category
        end)

    let unwrap = function Ecoproto_error ecoerror -> Some ecoerror | _ -> None

    let wrap ecoerror = Ecoproto_error ecoerror
  end

  module Error_monad = struct
    type shell_tztrace = Error_monad.tztrace

    type 'a shell_tzresult = ('a, Error_monad.tztrace) result

    include Error_core
    include Tezos_error_monad.TzLwtreslib.Monad
    include
      Tezos_error_monad.Monad_maker.Make (Error_core) (TzTrace)
        (Tezos_error_monad.TzLwtreslib.Monad)

    (* Backwards compatibility additions (dont_wait, trace helpers) *)
    include Tezos_protocol_environment_structs.V3.Error_monad_infix_globals

    include
      Tezos_protocol_environment_structs.V3.Error_monad_preallocated_values

    include Tezos_protocol_environment_structs.V3.Error_monad_trace_eval

    let fail e = Lwt.return_error (TzTrace.make e)

    let error e = Error (TzTrace.make e)

    let dont_wait ex er f = dont_wait f er ex

    let trace_of_error e = TzTrace.make e

    let make_trace_encoding e = TzTrace.encoding e

    let pp_trace = pp_print_trace

    type 'err trace = 'err TzTrace.trace

    (* Shadowing catch to prevent catching system exceptions *)
    type error += Exn of exn

    let () =
      register_error_kind
        `Temporary
        ~id:"failure"
        ~title:"Exception"
        ~description:"Exception safely wrapped in an error"
        ~pp:(fun ppf s ->
          Format.fprintf ppf "@[<h 0>%a@]" Format.pp_print_text s)
        Data_encoding.(obj1 (req "msg" string))
        (function
          | Exn (Failure msg) -> Some msg
          | Exn exn -> Some (Printexc.to_string exn)
          | _ -> None)
        (fun msg -> Exn (Failure msg))

    let error_of_exn e = TzTrace.make @@ Exn e

    let catch ?catch_only f =
      Result.catch ?catch_only f |> Result.map_error error_of_exn

    let catch_f ?catch_only f h =
      Result.catch ?catch_only f
      |> Result.map_error (fun e -> trace_of_error (h e))

    let catch_s ?catch_only f =
      let open Lwt_syntax in
      let+ r = Result.catch_s ?catch_only f in
      Result.map_error (fun e -> error_of_exn e) r

    (* Shouldn't be used, only to keep the same environment interface *)
    let classify_error error = (find_info_of_error error).category

    let both_e = Tezos_error_monad.TzLwtreslib.Monad.Traced_result_syntax.both

    let join_e = Tezos_error_monad.TzLwtreslib.Monad.Traced_result_syntax.join

    let all_e = Tezos_error_monad.TzLwtreslib.Monad.Traced_result_syntax.all
  end

  let () =
    let id = Format.asprintf "proto.%s.wrapper" Param.name in
    register_wrapped_error_kind
      (module Wrapped_error_monad)
      ~id
      ~title:("Error returned by protocol " ^ Param.name)
      ~description:("Wrapped error for economic protocol " ^ Param.name ^ ".")

  let wrap_tzerror error = Ecoproto_error error

  let wrap_tztrace t = List.map wrap_tzerror t

  let wrap_tzresult r = Result.map_error wrap_tztrace r

  module Chain_id = Tezos_crypto.Hashed.Chain_id
  module Block_hash = Tezos_crypto.Hashed.Block_hash
  module Operation_hash = Tezos_crypto.Hashed.Operation_hash
  module Operation_list_hash = Tezos_crypto.Hashed.Operation_list_hash
  module Operation_list_list_hash = Tezos_crypto.Hashed.Operation_list_list_hash
  module Context_hash = Tezos_crypto.Hashed.Context_hash
  module Protocol_hash = Tezos_crypto.Hashed.Protocol_hash
  module Blake2B = Tezos_crypto.Blake2B
  module Fitness = Fitness
  module Operation = Operation
  module Block_header = Block_header
  module Protocol = Protocol
  module RPC_arg = Tezos_rpc.Arg
  module RPC_path = Tezos_rpc.Path
  module RPC_query = Tezos_rpc.Query
  module RPC_service = Tezos_rpc.Service

  module RPC_answer = struct
    type 'o t =
      [ `Ok of 'o (* 200 *)
      | `OkChunk of 'o (* 200 but with chunked transfer encoding *)
      | `OkStream of 'o stream (* 200 *)
      | `Created of string option (* 201 *)
      | `No_content (* 204 *)
      | `Unauthorized of Error_monad.error list option (* 401 *)
      | `Forbidden of Error_monad.error list option (* 403 *)
      | `Not_found of Error_monad.error list option (* 404 *)
      | `Conflict of Error_monad.error list option (* 409 *)
      | `Error of Error_monad.error list option (* 500 *) ]

    and 'a stream = 'a Resto_directory.Answer.stream = {
      next : unit -> 'a option Lwt.t;
      shutdown : unit -> unit;
    }

    let return x = Lwt.return (`Ok x)

    let return_chunked x = Lwt.return (`OkChunk x)

    let return_stream x = Lwt.return (`OkStream x)

    let not_found = Lwt.return (`Not_found None)

    let fail err = Lwt.return (`Error (Some err))
  end

  module RPC_directory = struct
    include Tezos_protocol_environment_structs.V3.RPC_directory

    let gen_register dir service handler =
      let open Lwt_syntax in
      gen_register dir service (fun p q i ->
          let* r = handler p q i in
          match r with
          | `Ok o -> RPC_answer.return o
          | `OkChunk o -> RPC_answer.return_chunked o
          | `OkStream s -> RPC_answer.return_stream s
          | `Created s -> Lwt.return (`Created s)
          | `No_content -> Lwt.return `No_content
          | `Unauthorized e ->
              let e = Option.map (List.map (fun e -> Ecoproto_error e)) e in
              Lwt.return (`Unauthorized e)
          | `Forbidden e ->
              let e = Option.map (List.map (fun e -> Ecoproto_error e)) e in
              Lwt.return (`Forbidden e)
          | `Not_found e ->
              let e = Option.map (List.map (fun e -> Ecoproto_error e)) e in
              Lwt.return (`Not_found e)
          | `Conflict e ->
              let e = Option.map (List.map (fun e -> Ecoproto_error e)) e in
              Lwt.return (`Conflict e)
          | `Error e ->
              let e = Option.map (List.map (fun e -> Ecoproto_error e)) e in
              Lwt.return (`Error e))

    let register ~chunked dir service handler =
      let open Lwt_syntax in
      gen_register dir service (fun p q i ->
          let* r = handler p q i in
          match r with
          | Ok o when chunked -> RPC_answer.return_chunked o
          | Ok o (* otherwise *) -> RPC_answer.return o
          | Error e -> RPC_answer.fail e)

    let opt_register ~chunked dir service handler =
      let open Lwt_syntax in
      gen_register dir service (fun p q i ->
          let* r = handler p q i in
          match r with
          | Ok (Some o) when chunked -> RPC_answer.return_chunked o
          | Ok (Some o) (* otherwise *) -> RPC_answer.return o
          | Ok None -> RPC_answer.not_found
          | Error e -> RPC_answer.fail e)

    let lwt_register ~chunked dir service handler =
      let open Lwt_syntax in
      gen_register dir service (fun p q i ->
          let* o = handler p q i in
          if chunked then RPC_answer.return_chunked o else RPC_answer.return o)

    open Curry

    let register0 ~chunked root s f = register ~chunked root s (curry Z f)

    let register1 ~chunked root s f = register ~chunked root s (curry (S Z) f)

    let register2 ~chunked root s f =
      register ~chunked root s (curry (S (S Z)) f)

    let register3 ~chunked root s f =
      register ~chunked root s (curry (S (S (S Z))) f)

    let register4 ~chunked root s f =
      register ~chunked root s (curry (S (S (S (S Z)))) f)

    let register5 ~chunked root s f =
      register ~chunked root s (curry (S (S (S (S (S Z))))) f)

    let opt_register0 ~chunked root s f =
      opt_register ~chunked root s (curry Z f)

    let opt_register1 ~chunked root s f =
      opt_register ~chunked root s (curry (S Z) f)

    let opt_register2 ~chunked root s f =
      opt_register ~chunked root s (curry (S (S Z)) f)

    let opt_register3 ~chunked root s f =
      opt_register ~chunked root s (curry (S (S (S Z))) f)

    let opt_register4 ~chunked root s f =
      opt_register ~chunked root s (curry (S (S (S (S Z)))) f)

    let opt_register5 ~chunked root s f =
      opt_register ~chunked root s (curry (S (S (S (S (S Z))))) f)

    let gen_register0 root s f = gen_register root s (curry Z f)

    let gen_register1 root s f = gen_register root s (curry (S Z) f)

    let gen_register2 root s f = gen_register root s (curry (S (S Z)) f)

    let gen_register3 root s f = gen_register root s (curry (S (S (S Z))) f)

    let gen_register4 root s f = gen_register root s (curry (S (S (S (S Z)))) f)

    let gen_register5 root s f =
      gen_register root s (curry (S (S (S (S (S Z))))) f)

    let lwt_register0 ~chunked root s f =
      lwt_register ~chunked root s (curry Z f)

    let lwt_register1 ~chunked root s f =
      lwt_register ~chunked root s (curry (S Z) f)

    let lwt_register2 ~chunked root s f =
      lwt_register ~chunked root s (curry (S (S Z)) f)

    let lwt_register3 ~chunked root s f =
      lwt_register ~chunked root s (curry (S (S (S Z))) f)

    let lwt_register4 ~chunked root s f =
      lwt_register ~chunked root s (curry (S (S (S (S Z)))) f)

    let lwt_register5 ~chunked root s f =
      lwt_register ~chunked root s (curry (S (S (S (S (S Z))))) f)
  end

  module RPC_context = struct
    type t = rpc_context

    class type ['pr] simple =
      object
        method call_proto_service0 :
          'm 'q 'i 'o.
          (([< RPC_service.meth] as 'm), t, t, 'q, 'i, 'o) RPC_service.t ->
          'pr ->
          'q ->
          'i ->
          'o Error_monad.shell_tzresult Lwt.t

        method call_proto_service1 :
          'm 'a 'q 'i 'o.
          (([< RPC_service.meth] as 'm), t, t * 'a, 'q, 'i, 'o) RPC_service.t ->
          'pr ->
          'a ->
          'q ->
          'i ->
          'o Error_monad.shell_tzresult Lwt.t

        method call_proto_service2 :
          'm 'a 'b 'q 'i 'o.
          ( ([< RPC_service.meth] as 'm),
            t,
            (t * 'a) * 'b,
            'q,
            'i,
            'o )
          RPC_service.t ->
          'pr ->
          'a ->
          'b ->
          'q ->
          'i ->
          'o Error_monad.shell_tzresult Lwt.t

        method call_proto_service3 :
          'm 'a 'b 'c 'q 'i 'o.
          ( ([< RPC_service.meth] as 'm),
            t,
            ((t * 'a) * 'b) * 'c,
            'q,
            'i,
            'o )
          RPC_service.t ->
          'pr ->
          'a ->
          'b ->
          'c ->
          'q ->
          'i ->
          'o Error_monad.shell_tzresult Lwt.t
      end

    let make_call0 s (ctxt : _ simple) = ctxt#call_proto_service0 s

    let make_call0 = (make_call0 : _ -> _ simple -> _ :> _ -> _ #simple -> _)

    let make_call1 s (ctxt : _ simple) = ctxt#call_proto_service1 s

    let make_call1 = (make_call1 : _ -> _ simple -> _ :> _ -> _ #simple -> _)

    let make_call2 s (ctxt : _ simple) = ctxt#call_proto_service2 s

    let make_call2 = (make_call2 : _ -> _ simple -> _ :> _ -> _ #simple -> _)

    let make_call3 s (ctxt : _ simple) = ctxt#call_proto_service3 s

    let make_call3 = (make_call3 : _ -> _ simple -> _ :> _ -> _ #simple -> _)

    let make_opt_call0 s ctxt block q i =
      let open Lwt_syntax in
      let* r = make_call0 s ctxt block q i in
      match r with
      | Error [Tezos_rpc.Context.Not_found _] -> Lwt.return_ok None
      | Error _ as v -> Lwt.return v
      | Ok v -> Lwt.return_ok (Some v)

    let make_opt_call1 s ctxt block a1 q i =
      let open Lwt_syntax in
      let* r = make_call1 s ctxt block a1 q i in
      match r with
      | Error [Tezos_rpc.Context.Not_found _] -> Lwt.return_ok None
      | Error _ as v -> Lwt.return v
      | Ok v -> Lwt.return_ok (Some v)

    let make_opt_call2 s ctxt block a1 a2 q i =
      let open Lwt_syntax in
      let* r = make_call2 s ctxt block a1 a2 q i in
      match r with
      | Error [Tezos_rpc.Context.Not_found _] -> Lwt.return_ok None
      | Error _ as v -> Lwt.return v
      | Ok v -> Lwt.return_ok (Some v)

    let make_opt_call3 s ctxt block a1 a2 a3 q i =
      let open Lwt_syntax in
      let* r = make_call3 s ctxt block a1 a2 a3 q i in
      match r with
      | Error [Tezos_rpc.Context.Not_found _] -> Lwt.return_ok None
      | Error _ as v -> Lwt.return v
      | Ok v -> Lwt.return_ok (Some v)
  end

  module Sapling = Tezos_sapling.Core.Validator_legacy

  module Micheline = struct
    include Micheline
    include Micheline_encoding

    (* Note: we "lie" about canonical-v1 and actually use canonical-v2 behind
       the protocol's back. Truly, the protocol shouldn't have access to
       versions (it should just have access to plain canonical) and the
       environment should ensure the stability. *)
    let canonical_encoding_v1 ~variant encoding =
      canonical_encoding_v2 ~variant:(Param.name ^ "." ^ variant) encoding

    (* For backwards compatibility, the version here is wrong *)
    let canonical_encoding ~variant encoding =
      canonical_encoding_v0 ~variant:(Param.name ^ "." ^ variant) encoding
  end

  module Updater = struct
    type nonrec validation_result = legacy_validation_result = {
      context : Context.t;
      fitness : Fitness.t;
      message : string option;
      max_operations_ttl : int;
      last_allowed_fork_level : Int32.t;
    }

    type nonrec quota = quota = {max_size : int; max_op : int option}

    type nonrec rpc_context = rpc_context = {
      block_hash : Block_hash.t;
      block_header : Block_header.shell_header;
      context : Context.t;
    }

    let activate = Context.set_protocol

    module type PROTOCOL =
      Environment_protocol_T_V3.T
        with type context := Context.t
         and type cache_value := Environment_context.Context.cache_value
         and type cache_key := Environment_context.Context.cache_key
         and type quota := quota
         and type validation_result := legacy_validation_result
         and type rpc_context := rpc_context
         and type 'a tzresult := 'a Error_monad.tzresult
  end

  module Base58 = struct
    include Tezos_crypto.Base58

    let simple_encode enc s = simple_encode enc s

    let simple_decode enc s = simple_decode enc s

    include Make (struct
      type context = Context.t
    end)

    let decode s = decode s
  end

  module Context = struct
    include Context
    include Environment_context.V3

    let fold ?depth ctxt k ~init ~f =
      Context.fold ?depth ctxt k ~order:`Sorted ~init ~f

    module Tree = struct
      include Tree

      let fold ?depth ctxt k ~init ~f =
        fold ?depth ctxt k ~order:`Sorted ~init ~f
    end

    module type CACHE = Environment_context.CACHE

    let register_resolver = Base58.register_resolver

    let complete ctxt s = Base58.complete ctxt s
  end

  module Lift (P : Updater.PROTOCOL) = struct
    let environment_version = Protocol.V3

    let expected_context_hash = Resulting_context

    include P

    let block_header_metadata_encoding_with_legacy_attestation_name =
      block_header_metadata_encoding

    let operation_data_encoding_with_legacy_attestation_name =
      operation_data_encoding

    let operation_receipt_encoding_with_legacy_attestation_name =
      operation_receipt_encoding

    let operation_data_and_receipt_encoding_with_legacy_attestation_name =
      operation_data_and_receipt_encoding

    let value_of_key ~chain_id ~predecessor_context ~predecessor_timestamp
        ~predecessor_level ~predecessor_fitness ~predecessor ~timestamp =
      let open Lwt_result_syntax in
      let*! r =
        value_of_key
          ~chain_id
          ~predecessor_context
          ~predecessor_timestamp
          ~predecessor_level
          ~predecessor_fitness
          ~predecessor
          ~timestamp
      in
      let*? f = wrap_tzresult r in
      return (fun x ->
          let*! r = f x in
          Lwt.return (wrap_tzresult r))

    type application_state = validation_state

    type mode =
      | Application of block_header
      | Partial_validation of block_header
      | Construction of {
          predecessor_hash : Block_hash.t;
          timestamp : Time.t;
          block_header_data : block_header_data;
        }
      | Partial_construction of {
          predecessor_hash : Block_hash.t;
          timestamp : Time.t;
        }

    (** Ensure that the cache is correctly loaded in memory
        before running any operations. *)
    let load_predecessor_cache predecessor_context chain_id mode
        (predecessor_shell_header : Block_header.shell_header) cache =
      let open Lwt_result_syntax in
      let predecessor, timestamp =
        match mode with
        | Application block_header | Partial_validation block_header ->
            (block_header.shell.predecessor, block_header.shell.timestamp)
        | Construction {predecessor_hash; timestamp; _}
        | Partial_construction {predecessor_hash; timestamp} ->
            (predecessor_hash, timestamp)
      in
      let* value_of_key =
        value_of_key
          ~chain_id
          ~predecessor_context
          ~predecessor_timestamp:predecessor_shell_header.timestamp
          ~predecessor_level:predecessor_shell_header.level
          ~predecessor_fitness:predecessor_shell_header.fitness
          ~predecessor
          ~timestamp
      in
      Context.load_cache predecessor predecessor_context cache value_of_key

    let begin_validation_or_application validation_or_application ctxt chain_id
        mode ~(predecessor : Block_header.shell_header) ~cache =
      let open Lwt_result_syntax in
      let* ctxt = load_predecessor_cache ctxt chain_id mode predecessor cache in
      let*! validation_state =
        match (validation_or_application, mode) with
        | `Validation, Application block_header
        | _, Partial_validation block_header ->
            (* For the validation of an existing block, we always use the
               old [begin_partial_application], even in full [Application]
               mode. Indeed, this maintains the behavior of old block
               [precheck] (from [lib_validation/block_validation.ml]), which
               relied on [Partial_validation] mode to quickly assess the
               viability of the block. *)
            begin_partial_application
              ~chain_id
              ~ancestor_context:ctxt
              ~predecessor_timestamp:predecessor.timestamp
              ~predecessor_fitness:predecessor.fitness
              block_header
        | `Application, Application block_header ->
            begin_application
              ~chain_id
              ~predecessor_context:ctxt
              ~predecessor_timestamp:predecessor.timestamp
              ~predecessor_fitness:predecessor.fitness
              block_header
        | _, Construction {predecessor_hash; timestamp; block_header_data} ->
            begin_construction
              ~chain_id
              ~predecessor_context:ctxt
              ~predecessor_timestamp:predecessor.timestamp
              ~predecessor_level:predecessor.level
              ~predecessor_fitness:predecessor.fitness
              ~predecessor:predecessor_hash
              ~timestamp
              ~protocol_data:block_header_data
              ()
        | _, Partial_construction {predecessor_hash; timestamp} ->
            begin_construction
              ~chain_id
              ~predecessor_context:ctxt
              ~predecessor_timestamp:predecessor.timestamp
              ~predecessor_level:predecessor.level
              ~predecessor_fitness:predecessor.fitness
              ~predecessor:predecessor_hash
              ~timestamp
              ()
      in
      Lwt.return (wrap_tzresult validation_state)

    let begin_validation = begin_validation_or_application `Validation

    let begin_application = begin_validation_or_application `Application

    let wrap_apply_operation state operation =
      let open Lwt_syntax in
      let+ state = apply_operation state operation in
      wrap_tzresult state

    let validate_operation ?check_signature:_ state _oph operation =
      let open Lwt_result_syntax in
      let* state, _operation_receipt = wrap_apply_operation state operation in
      return state

    let apply_operation state _oph operation =
      wrap_apply_operation state operation

    let wrap_finalize_block state shell_header =
      let open Lwt_syntax in
      let* r = finalize_block state shell_header in
      match r with
      | Ok (vr, metadata) ->
          Lwt.return_ok (lift_legacy_validation_result vr, metadata)
      | Error e -> Lwt.return (wrap_tzresult (Error e))

    let finalize_validation state =
      let open Lwt_result_syntax in
      let dummy_shell_header =
        (* A shell header is required in construction mode so that
           [finalize_block] does not return an error. However, it is
           only used to compute the cache nonce, which is discarded
           here anyway. *)
        {
          Block_header.level = 0l;
          proto_level = 0;
          predecessor = Block_hash.zero;
          timestamp = Time.epoch;
          validation_passes = 0;
          operations_hash = Operation_list_list_hash.zero;
          fitness = [];
          context = Context_hash.zero;
        }
      in
      let* _ = wrap_finalize_block state (Some dummy_shell_header) in
      return_unit

    let finalize_application = wrap_finalize_block

    let init _chain_id c bh =
      let open Lwt_syntax in
      let* r = init c bh in
      match r with
      | Ok vr -> Lwt.return_ok (lift_legacy_validation_result vr)
      | Error e -> Lwt.return (wrap_tzresult (Error e))

    let set_log_message_consumer f = Logging.logging_function := Some f

    let compare_operations (_, op) (_, op') =
      relative_position_within_block op op'

    let acceptable_pass op =
      match acceptable_passes op with [n] -> Some n | _ -> None

    (* Fake mempool that can be successfully initialized but cannot
       accept any operations. *)
    module Mempool = struct
      type t = unit

      type validation_info = unit

      type conflict_handler =
        existing_operation:Operation_hash.t * operation ->
        new_operation:Operation_hash.t * operation ->
        [`Keep | `Replace]

      type operation_conflict =
        | Operation_conflict of {
            existing : Operation_hash.t;
            new_operation : Operation_hash.t;
          }

      type add_result =
        | Added
        | Replaced of {removed : Operation_hash.t}
        | Unchanged

      type add_error =
        | Validation_error of error trace
        | Add_conflict of operation_conflict

      type merge_error =
        | Incompatible_mempool
        | Merge_conflict of operation_conflict

      let init _ _ ~head_hash:_ ~head:_ ~cache:_ = Lwt.return_ok ((), ())

      let encoding = Data_encoding.unit

      let add_operation ?check_signature:_ ?conflict_handler:_ _ _ _ =
        let msg =
          "The mempool cannot accept any operations because it does not \
           support the current protocol."
        in
        Lwt.return_error (Validation_error [Exn (Failure msg)])

      let remove_operation () _ = ()

      let merge ?conflict_handler:_ () () = Ok ()

      let operations () = Operation_hash.Map.empty
    end
  end

  class ['chain, 'block] proto_rpc_context (t : Tezos_rpc.Context.t)
    (prefix : (unit, (unit * 'chain) * 'block) RPC_path.t) =
    object
      method call_proto_service0
          : 'm 'q 'i 'o.
            ( ([< RPC_service.meth] as 'm),
              RPC_context.t,
              RPC_context.t,
              'q,
              'i,
              'o )
            RPC_service.t ->
            'chain * 'block ->
            'q ->
            'i ->
            'o tzresult Lwt.t =
        fun s (chain, block) q i ->
          let s = RPC_service.subst0 s in
          let s = RPC_service.prefix prefix s in
          t#call_service s (((), chain), block) q i

      method call_proto_service1
          : 'm 'a 'q 'i 'o.
            ( ([< RPC_service.meth] as 'm),
              RPC_context.t,
              RPC_context.t * 'a,
              'q,
              'i,
              'o )
            RPC_service.t ->
            'chain * 'block ->
            'a ->
            'q ->
            'i ->
            'o tzresult Lwt.t =
        fun s (chain, block) a1 q i ->
          let s = RPC_service.subst1 s in
          let s = RPC_service.prefix prefix s in
          t#call_service s ((((), chain), block), a1) q i

      method call_proto_service2
          : 'm 'a 'b 'q 'i 'o.
            ( ([< RPC_service.meth] as 'm),
              RPC_context.t,
              (RPC_context.t * 'a) * 'b,
              'q,
              'i,
              'o )
            RPC_service.t ->
            'chain * 'block ->
            'a ->
            'b ->
            'q ->
            'i ->
            'o tzresult Lwt.t =
        fun s (chain, block) a1 a2 q i ->
          let s = RPC_service.subst2 s in
          let s = RPC_service.prefix prefix s in
          t#call_service s (((((), chain), block), a1), a2) q i

      method call_proto_service3
          : 'm 'a 'b 'c 'q 'i 'o.
            ( ([< RPC_service.meth] as 'm),
              RPC_context.t,
              ((RPC_context.t * 'a) * 'b) * 'c,
              'q,
              'i,
              'o )
            RPC_service.t ->
            'chain * 'block ->
            'a ->
            'b ->
            'c ->
            'q ->
            'i ->
            'o tzresult Lwt.t =
        fun s (chain, block) a1 a2 a3 q i ->
          let s = RPC_service.subst3 s in
          let s = RPC_service.prefix prefix s in
          t#call_service s ((((((), chain), block), a1), a2), a3) q i
    end

  class ['block] proto_rpc_context_of_directory conv dir :
    ['block] RPC_context.simple =
    let lookup = new Tezos_rpc.Context.of_directory dir in
    object
      method call_proto_service0
          : 'm 'q 'i 'o.
            ( ([< RPC_service.meth] as 'm),
              RPC_context.t,
              RPC_context.t,
              'q,
              'i,
              'o )
            RPC_service.t ->
            'block ->
            'q ->
            'i ->
            'o tzresult Lwt.t =
        fun s block q i ->
          let rpc_context = conv block in
          lookup#call_service s rpc_context q i

      method call_proto_service1
          : 'm 'a 'q 'i 'o.
            ( ([< RPC_service.meth] as 'm),
              RPC_context.t,
              RPC_context.t * 'a,
              'q,
              'i,
              'o )
            RPC_service.t ->
            'block ->
            'a ->
            'q ->
            'i ->
            'o tzresult Lwt.t =
        fun s block a1 q i ->
          let rpc_context = conv block in
          lookup#call_service s (rpc_context, a1) q i

      method call_proto_service2
          : 'm 'a 'b 'q 'i 'o.
            ( ([< RPC_service.meth] as 'm),
              RPC_context.t,
              (RPC_context.t * 'a) * 'b,
              'q,
              'i,
              'o )
            RPC_service.t ->
            'block ->
            'a ->
            'b ->
            'q ->
            'i ->
            'o tzresult Lwt.t =
        fun s block a1 a2 q i ->
          let rpc_context = conv block in
          lookup#call_service s ((rpc_context, a1), a2) q i

      method call_proto_service3
          : 'm 'a 'b 'c 'q 'i 'o.
            ( ([< RPC_service.meth] as 'm),
              RPC_context.t,
              ((RPC_context.t * 'a) * 'b) * 'c,
              'q,
              'i,
              'o )
            RPC_service.t ->
            'block ->
            'a ->
            'b ->
            'c ->
            'q ->
            'i ->
            'o tzresult Lwt.t =
        fun s block a1 a2 a3 q i ->
          let rpc_context = conv block in
          lookup#call_service s (((rpc_context, a1), a2), a3) q i
    end

  module Equality_witness = Environment_context.Equality_witness
end
OCaml

Innovation. Community. Security.