1// Copyright (c) 2009-2010 Satoshi Nakamoto
2// Copyright (c) 2009-present The Bitcoin Core developers
3// Distributed under the MIT software license, see the accompanying
4// file COPYING or http://www.opensource.org/licenses/mit-license.php.
5
6#include <script/script_error.h>
7
8#include <string>
9
10std::string ScriptErrorString(const ScriptError serror)
11{
12    switch (serror)
13    {
14        case SCRIPT_ERR_OK:
15            return "No error";
16        case SCRIPT_ERR_EVAL_FALSE:
17            return "Script evaluated without error but finished with a false/empty top stack element";
18        case SCRIPT_ERR_VERIFY:
19            return "Script failed an OP_VERIFY operation";
20        case SCRIPT_ERR_EQUALVERIFY:
21            return "Script failed an OP_EQUALVERIFY operation";
22        case SCRIPT_ERR_CHECKMULTISIGVERIFY:
23            return "Script failed an OP_CHECKMULTISIGVERIFY operation";
24        case SCRIPT_ERR_CHECKSIGVERIFY:
25            return "Script failed an OP_CHECKSIGVERIFY operation";
26        case SCRIPT_ERR_NUMEQUALVERIFY:
27            return "Script failed an OP_NUMEQUALVERIFY operation";
28        case SCRIPT_ERR_SCRIPT_SIZE:
29            return "Script is too big";
30        case SCRIPT_ERR_PUSH_SIZE:
31            return "Push value size limit exceeded";
32        case SCRIPT_ERR_OP_COUNT:
33            return "Operation limit exceeded";
34        case SCRIPT_ERR_STACK_SIZE:
35            return "Stack size limit exceeded";
36        case SCRIPT_ERR_SIG_COUNT:
37            return "Signature count negative or greater than pubkey count";
38        case SCRIPT_ERR_PUBKEY_COUNT:
39            return "Pubkey count negative or limit exceeded";
40        case SCRIPT_ERR_BAD_OPCODE:
41            return "Opcode missing or not understood";
42        case SCRIPT_ERR_DISABLED_OPCODE:
43            return "Attempted to use a disabled opcode";
44        case SCRIPT_ERR_INVALID_STACK_OPERATION:
45            return "Operation not valid with the current stack size";
46        case SCRIPT_ERR_INVALID_ALTSTACK_OPERATION:
47            return "Operation not valid with the current altstack size";
48        case SCRIPT_ERR_OP_RETURN:
49            return "OP_RETURN was encountered";
50        case SCRIPT_ERR_UNBALANCED_CONDITIONAL:
51            return "Invalid OP_IF construction";
52        case SCRIPT_ERR_NEGATIVE_LOCKTIME:
53            return "Negative locktime";
54        case SCRIPT_ERR_UNSATISFIED_LOCKTIME:
55            return "Locktime requirement not satisfied";
56        case SCRIPT_ERR_SIG_HASHTYPE:
57            return "Signature hash type missing or not understood";
58        case SCRIPT_ERR_SIG_DER:
59            return "Non-canonical DER signature";
60        case SCRIPT_ERR_MINIMALDATA:
61            return "Data push larger than necessary";
62        case SCRIPT_ERR_SIG_PUSHONLY:
63            return "Only push operators allowed in signatures";
64        case SCRIPT_ERR_SIG_HIGH_S:
65            return "Non-canonical signature: S value is unnecessarily high";
66        case SCRIPT_ERR_SIG_NULLDUMMY:
67            return "Dummy CHECKMULTISIG argument must be zero";
68        case SCRIPT_ERR_MINIMALIF:
69            return "OP_IF/NOTIF argument must be minimal";
70        case SCRIPT_ERR_SIG_NULLFAIL:
71            return "Signature must be zero for failed CHECK(MULTI)SIG operation";
72        case SCRIPT_ERR_DISCOURAGE_UPGRADABLE_NOPS:
73            return "NOPx reserved for soft-fork upgrades";
74        case SCRIPT_ERR_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM:
75            return "Witness version reserved for soft-fork upgrades";
76        case SCRIPT_ERR_DISCOURAGE_UPGRADABLE_TAPROOT_VERSION:
77            return "Taproot version reserved for soft-fork upgrades";
78        case SCRIPT_ERR_DISCOURAGE_OP_SUCCESS:
79            return "OP_SUCCESSx reserved for soft-fork upgrades";
80        case SCRIPT_ERR_DISCOURAGE_UPGRADABLE_PUBKEYTYPE:
81            return "Public key version reserved for soft-fork upgrades";
82        case SCRIPT_ERR_PUBKEYTYPE:
83            return "Public key is neither compressed or uncompressed";
84        case SCRIPT_ERR_CLEANSTACK:
85            return "Stack size must be exactly one after execution";
86        case SCRIPT_ERR_WITNESS_PROGRAM_WRONG_LENGTH:
87            return "Witness program has incorrect length";
88        case SCRIPT_ERR_WITNESS_PROGRAM_WITNESS_EMPTY:
89            return "Witness program was passed an empty witness";
90        case SCRIPT_ERR_WITNESS_PROGRAM_MISMATCH:
91            return "Witness program hash mismatch";
92        case SCRIPT_ERR_WITNESS_MALLEATED:
93            return "Witness requires empty scriptSig";
94        case SCRIPT_ERR_WITNESS_MALLEATED_P2SH:
95            return "Witness requires only-redeemscript scriptSig";
96        case SCRIPT_ERR_WITNESS_UNEXPECTED:
97            return "Witness provided for non-witness script";
98        case SCRIPT_ERR_WITNESS_PUBKEYTYPE:
99            return "Using non-compressed keys in segwit";
100        case SCRIPT_ERR_SCHNORR_SIG_SIZE:
101            return "Invalid Schnorr signature size";
102        case SCRIPT_ERR_SCHNORR_SIG_HASHTYPE:
103            return "Invalid Schnorr signature hash type";
104        case SCRIPT_ERR_SCHNORR_SIG:
105            return "Invalid Schnorr signature";
106        case SCRIPT_ERR_TAPROOT_WRONG_CONTROL_SIZE:
107            return "Invalid Taproot control block size";
108        case SCRIPT_ERR_TAPSCRIPT_VALIDATION_WEIGHT:
109            return "Too much signature validation relative to witness weight";
110        case SCRIPT_ERR_TAPSCRIPT_CHECKMULTISIG:
111            return "OP_CHECKMULTISIG(VERIFY) is not available in tapscript";
112        case SCRIPT_ERR_TAPSCRIPT_MINIMALIF:
113            return "OP_IF/NOTIF argument must be minimal in tapscript";
114        case SCRIPT_ERR_TAPSCRIPT_EMPTY_PUBKEY:
115            return "Empty public key in tapscript";
116        case SCRIPT_ERR_OP_CODESEPARATOR:
117            return "Using OP_CODESEPARATOR in non-witness script";
118        case SCRIPT_ERR_SIG_FINDANDDELETE:
119            return "Signature is found in scriptCode";
120        case SCRIPT_ERR_SCRIPTNUM:
121            return "Script number overflowed or is non-minimally encoded";
122        case SCRIPT_ERR_UNKNOWN_ERROR:
123        case SCRIPT_ERR_ERROR_COUNT:
124            break;
125    } // no default case, so the compiler can warn about missing cases
126    return "unknown error";
127}
128