LCOV - code coverage report
Current view: top level - src/script - interpreter.h (source / functions) Coverage Total Hit
Test: fuzz_coverage.info Lines: 85.2 % 27 23
Test Date: 2025-10-10 04:04:55 Functions: 86.7 % 15 13
Branches: 61.5 % 26 16

             Branch data     Line data    Source code
       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                 :             : #ifndef BITCOIN_SCRIPT_INTERPRETER_H
       7                 :             : #define BITCOIN_SCRIPT_INTERPRETER_H
       8                 :             : 
       9                 :             : #include <consensus/amount.h>
      10                 :             : #include <hash.h>
      11                 :             : #include <primitives/transaction.h>
      12                 :             : #include <script/script_error.h> // IWYU pragma: export
      13                 :             : #include <script/verify_flags.h> // IWYU pragma: export
      14                 :             : #include <span.h>
      15                 :             : #include <uint256.h>
      16                 :             : 
      17                 :             : #include <cstddef>
      18                 :             : #include <cstdint>
      19                 :             : #include <optional>
      20                 :             : #include <vector>
      21                 :             : 
      22                 :             : class CPubKey;
      23                 :             : class CScript;
      24                 :             : class CScriptNum;
      25                 :             : class XOnlyPubKey;
      26                 :             : struct CScriptWitness;
      27                 :             : 
      28                 :             : /** Signature hash types/flags */
      29                 :             : enum
      30                 :             : {
      31                 :             :     SIGHASH_ALL = 1,
      32                 :             :     SIGHASH_NONE = 2,
      33                 :             :     SIGHASH_SINGLE = 3,
      34                 :             :     SIGHASH_ANYONECANPAY = 0x80,
      35                 :             : 
      36                 :             :     SIGHASH_DEFAULT = 0, //!< Taproot only; implied when sighash byte is missing, and equivalent to SIGHASH_ALL
      37                 :             :     SIGHASH_OUTPUT_MASK = 3,
      38                 :             :     SIGHASH_INPUT_MASK = 0x80,
      39                 :             : };
      40                 :             : 
      41                 :             : /** Script verification flags.
      42                 :             :  *
      43                 :             :  *  All flags are intended to be soft forks: the set of acceptable scripts under
      44                 :             :  *  flags (A | B) is a subset of the acceptable scripts under flag (A).
      45                 :             :  */
      46                 :             : 
      47                 :             : static constexpr script_verify_flags SCRIPT_VERIFY_NONE{0};
      48                 :             : 
      49                 :             : enum class script_verify_flag_name : uint8_t {
      50                 :             :     // Evaluate P2SH subscripts (BIP16).
      51                 :             :     SCRIPT_VERIFY_P2SH,
      52                 :             : 
      53                 :             :     // Passing a non-strict-DER signature or one with undefined hashtype to a checksig operation causes script failure.
      54                 :             :     // Evaluating a pubkey that is not (0x04 + 64 bytes) or (0x02 or 0x03 + 32 bytes) by checksig causes script failure.
      55                 :             :     // (not used or intended as a consensus rule).
      56                 :             :     SCRIPT_VERIFY_STRICTENC,
      57                 :             : 
      58                 :             :     // Passing a non-strict-DER signature to a checksig operation causes script failure (BIP62 rule 1)
      59                 :             :     SCRIPT_VERIFY_DERSIG,
      60                 :             : 
      61                 :             :     // Passing a non-strict-DER signature or one with S > order/2 to a checksig operation causes script failure
      62                 :             :     // (BIP62 rule 5).
      63                 :             :     SCRIPT_VERIFY_LOW_S,
      64                 :             : 
      65                 :             :     // verify dummy stack item consumed by CHECKMULTISIG is of zero-length (BIP62 rule 7).
      66                 :             :     SCRIPT_VERIFY_NULLDUMMY,
      67                 :             : 
      68                 :             :     // Using a non-push operator in the scriptSig causes script failure (BIP62 rule 2).
      69                 :             :     SCRIPT_VERIFY_SIGPUSHONLY,
      70                 :             : 
      71                 :             :     // Require minimal encodings for all push operations (OP_0... OP_16, OP_1NEGATE where possible, direct
      72                 :             :     // pushes up to 75 bytes, OP_PUSHDATA up to 255 bytes, OP_PUSHDATA2 for anything larger). Evaluating
      73                 :             :     // any other push causes the script to fail (BIP62 rule 3).
      74                 :             :     // In addition, whenever a stack element is interpreted as a number, it must be of minimal length (BIP62 rule 4).
      75                 :             :     SCRIPT_VERIFY_MINIMALDATA,
      76                 :             : 
      77                 :             :     // Discourage use of NOPs reserved for upgrades (NOP1-10)
      78                 :             :     //
      79                 :             :     // Provided so that nodes can avoid accepting or mining transactions
      80                 :             :     // containing executed NOP's whose meaning may change after a soft-fork,
      81                 :             :     // thus rendering the script invalid; with this flag set executing
      82                 :             :     // discouraged NOPs fails the script. This verification flag will never be
      83                 :             :     // a mandatory flag applied to scripts in a block. NOPs that are not
      84                 :             :     // executed, e.g.  within an unexecuted IF ENDIF block, are *not* rejected.
      85                 :             :     // NOPs that have associated forks to give them new meaning (CLTV, CSV)
      86                 :             :     // are not subject to this rule.
      87                 :             :     SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS,
      88                 :             : 
      89                 :             :     // Require that only a single stack element remains after evaluation. This changes the success criterion from
      90                 :             :     // "At least one stack element must remain, and when interpreted as a boolean, it must be true" to
      91                 :             :     // "Exactly one stack element must remain, and when interpreted as a boolean, it must be true".
      92                 :             :     // (BIP62 rule 6)
      93                 :             :     // Note: CLEANSTACK should never be used without P2SH or WITNESS.
      94                 :             :     // Note: WITNESS_V0 and TAPSCRIPT script execution have behavior similar to CLEANSTACK as part of their
      95                 :             :     //       consensus rules. It is automatic there and does not need this flag.
      96                 :             :     SCRIPT_VERIFY_CLEANSTACK,
      97                 :             : 
      98                 :             :     // Verify CHECKLOCKTIMEVERIFY
      99                 :             :     //
     100                 :             :     // See BIP65 for details.
     101                 :             :     SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY,
     102                 :             : 
     103                 :             :     // support CHECKSEQUENCEVERIFY opcode
     104                 :             :     //
     105                 :             :     // See BIP112 for details
     106                 :             :     SCRIPT_VERIFY_CHECKSEQUENCEVERIFY,
     107                 :             : 
     108                 :             :     // Support segregated witness
     109                 :             :     //
     110                 :             :     SCRIPT_VERIFY_WITNESS,
     111                 :             : 
     112                 :             :     // Making v1-v16 witness program non-standard
     113                 :             :     //
     114                 :             :     SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM,
     115                 :             : 
     116                 :             :     // Segwit script only: Require the argument of OP_IF/NOTIF to be exactly 0x01 or empty vector
     117                 :             :     //
     118                 :             :     // Note: TAPSCRIPT script execution has behavior similar to MINIMALIF as part of its consensus
     119                 :             :     //       rules. It is automatic there and does not depend on this flag.
     120                 :             :     SCRIPT_VERIFY_MINIMALIF,
     121                 :             : 
     122                 :             :     // Signature(s) must be empty vector if a CHECK(MULTI)SIG operation failed
     123                 :             :     //
     124                 :             :     SCRIPT_VERIFY_NULLFAIL,
     125                 :             : 
     126                 :             :     // Public keys in segregated witness scripts must be compressed
     127                 :             :     //
     128                 :             :     SCRIPT_VERIFY_WITNESS_PUBKEYTYPE,
     129                 :             : 
     130                 :             :     // Making OP_CODESEPARATOR and FindAndDelete fail any non-segwit scripts
     131                 :             :     //
     132                 :             :     SCRIPT_VERIFY_CONST_SCRIPTCODE,
     133                 :             : 
     134                 :             :     // Taproot/Tapscript validation (BIPs 341 & 342)
     135                 :             :     //
     136                 :             :     SCRIPT_VERIFY_TAPROOT,
     137                 :             : 
     138                 :             :     // Making unknown Taproot leaf versions non-standard
     139                 :             :     //
     140                 :             :     SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_TAPROOT_VERSION,
     141                 :             : 
     142                 :             :     // Making unknown OP_SUCCESS non-standard
     143                 :             :     SCRIPT_VERIFY_DISCOURAGE_OP_SUCCESS,
     144                 :             : 
     145                 :             :     // Making unknown public key versions (in BIP 342 scripts) non-standard
     146                 :             :     SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_PUBKEYTYPE,
     147                 :             : 
     148                 :             :     // Constants to point to the highest flag in use. Add new flags above this line.
     149                 :             :     //
     150                 :             :     SCRIPT_VERIFY_END_MARKER
     151                 :             : };
     152                 :             : using enum script_verify_flag_name;
     153                 :             : 
     154                 :             : static constexpr int MAX_SCRIPT_VERIFY_FLAGS_BITS = static_cast<int>(SCRIPT_VERIFY_END_MARKER);
     155                 :             : 
     156                 :             : // assert there is still a spare bit
     157                 :             : static_assert(0 < MAX_SCRIPT_VERIFY_FLAGS_BITS && MAX_SCRIPT_VERIFY_FLAGS_BITS <= 63);
     158                 :             : 
     159                 :             : static constexpr script_verify_flags::value_type MAX_SCRIPT_VERIFY_FLAGS = ((script_verify_flags::value_type{1} << MAX_SCRIPT_VERIFY_FLAGS_BITS) - 1);
     160                 :             : 
     161                 :             : bool CheckSignatureEncoding(const std::vector<unsigned char> &vchSig, script_verify_flags flags, ScriptError* serror);
     162                 :             : 
     163         [ #  # ]:      211311 : struct PrecomputedTransactionData
     164                 :             : {
     165                 :             :     // BIP341 precomputed data.
     166                 :             :     // These are single-SHA256, see https://github.com/bitcoin/bips/blob/master/bip-0341.mediawiki#cite_note-16.
     167                 :             :     uint256 m_prevouts_single_hash;
     168                 :             :     uint256 m_sequences_single_hash;
     169                 :             :     uint256 m_outputs_single_hash;
     170                 :             :     uint256 m_spent_amounts_single_hash;
     171                 :             :     uint256 m_spent_scripts_single_hash;
     172                 :             :     //! Whether the 5 fields above are initialized.
     173                 :             :     bool m_bip341_taproot_ready = false;
     174                 :             : 
     175                 :             :     // BIP143 precomputed data (double-SHA256).
     176                 :             :     uint256 hashPrevouts, hashSequence, hashOutputs;
     177                 :             :     //! Whether the 3 fields above are initialized.
     178                 :             :     bool m_bip143_segwit_ready = false;
     179                 :             : 
     180                 :             :     std::vector<CTxOut> m_spent_outputs;
     181                 :             :     //! Whether m_spent_outputs is initialized.
     182                 :             :     bool m_spent_outputs_ready = false;
     183                 :             : 
     184                 :     1382722 :     PrecomputedTransactionData() = default;
     185                 :             : 
     186                 :             :     /** Initialize this PrecomputedTransactionData with transaction data.
     187                 :             :      *
     188                 :             :      * @param[in]   tx             The transaction for which data is being precomputed.
     189                 :             :      * @param[in]   spent_outputs  The CTxOuts being spent, one for each tx.vin, in order.
     190                 :             :      * @param[in]   force          Whether to precompute data for all optional features,
     191                 :             :      *                             regardless of what is in the inputs (used at signing
     192                 :             :      *                             time, when the inputs aren't filled in yet). */
     193                 :             :     template <class T>
     194                 :             :     void Init(const T& tx, std::vector<CTxOut>&& spent_outputs, bool force = false);
     195                 :             : 
     196                 :             :     template <class T>
     197                 :             :     explicit PrecomputedTransactionData(const T& tx);
     198                 :             : };
     199                 :             : 
     200                 :             : enum class SigVersion
     201                 :             : {
     202                 :             :     BASE = 0,        //!< Bare scripts and BIP16 P2SH-wrapped redeemscripts
     203                 :             :     WITNESS_V0 = 1,  //!< Witness v0 (P2WPKH and P2WSH); see BIP 141
     204                 :             :     TAPROOT = 2,     //!< Witness v1 with 32-byte program, not BIP16 P2SH-wrapped, key path spending; see BIP 341
     205                 :             :     TAPSCRIPT = 3,   //!< Witness v1 with 32-byte program, not BIP16 P2SH-wrapped, script path spending, leaf version 0xc0; see BIP 342
     206                 :             : };
     207                 :             : 
     208         [ +  + ]:     1969726 : struct ScriptExecutionData
     209                 :             : {
     210                 :             :     //! Whether m_tapleaf_hash is initialized.
     211                 :             :     bool m_tapleaf_hash_init = false;
     212                 :             :     //! The tapleaf hash.
     213                 :             :     uint256 m_tapleaf_hash;
     214                 :             : 
     215                 :             :     //! Whether m_codeseparator_pos is initialized.
     216                 :             :     bool m_codeseparator_pos_init = false;
     217                 :             :     //! Opcode position of the last executed OP_CODESEPARATOR (or 0xFFFFFFFF if none executed).
     218                 :             :     uint32_t m_codeseparator_pos;
     219                 :             : 
     220                 :             :     //! Whether m_annex_present and (when needed) m_annex_hash are initialized.
     221                 :             :     bool m_annex_init = false;
     222                 :             :     //! Whether an annex is present.
     223                 :             :     bool m_annex_present;
     224                 :             :     //! Hash of the annex data.
     225                 :             :     uint256 m_annex_hash;
     226                 :             : 
     227                 :             :     //! Whether m_validation_weight_left is initialized.
     228                 :             :     bool m_validation_weight_left_init = false;
     229                 :             :     //! How much validation weight is left (decremented for every successful non-empty signature check).
     230                 :             :     int64_t m_validation_weight_left;
     231                 :             : 
     232                 :             :     //! The hash of the corresponding output
     233                 :             :     std::optional<uint256> m_output_hash;
     234                 :             : };
     235                 :             : 
     236                 :             : /** Signature hash sizes */
     237                 :             : static constexpr size_t WITNESS_V0_SCRIPTHASH_SIZE = 32;
     238                 :             : static constexpr size_t WITNESS_V0_KEYHASH_SIZE = 20;
     239                 :             : static constexpr size_t WITNESS_V1_TAPROOT_SIZE = 32;
     240                 :             : 
     241                 :             : static constexpr uint8_t TAPROOT_LEAF_MASK = 0xfe;
     242                 :             : static constexpr uint8_t TAPROOT_LEAF_TAPSCRIPT = 0xc0;
     243                 :             : static constexpr size_t TAPROOT_CONTROL_BASE_SIZE = 33;
     244                 :             : static constexpr size_t TAPROOT_CONTROL_NODE_SIZE = 32;
     245                 :             : static constexpr size_t TAPROOT_CONTROL_MAX_NODE_COUNT = 128;
     246                 :             : static constexpr size_t TAPROOT_CONTROL_MAX_SIZE = TAPROOT_CONTROL_BASE_SIZE + TAPROOT_CONTROL_NODE_SIZE * TAPROOT_CONTROL_MAX_NODE_COUNT;
     247                 :             : 
     248                 :             : extern const HashWriter HASHER_TAPSIGHASH; //!< Hasher with tag "TapSighash" pre-fed to it.
     249                 :             : extern const HashWriter HASHER_TAPLEAF;    //!< Hasher with tag "TapLeaf" pre-fed to it.
     250                 :             : extern const HashWriter HASHER_TAPBRANCH;  //!< Hasher with tag "TapBranch" pre-fed to it.
     251                 :             : 
     252                 :             : /** Data structure to cache SHA256 midstates for the ECDSA sighash calculations
     253                 :             :  *  (bare, P2SH, P2WPKH, P2WSH). */
     254   [ +  +  -  - ]:      833824 : class SigHashCache
     255                 :             : {
     256                 :             :     /** For each sighash mode (ALL, SINGLE, NONE, ALL|ANYONE, SINGLE|ANYONE, NONE|ANYONE),
     257                 :             :      *  optionally store a scriptCode which the hash is for, plus a midstate for the SHA256
     258                 :             :      *  computation just before adding the hash_type itself. */
     259                 :             :     std::optional<std::pair<CScript, HashWriter>> m_cache_entries[6];
     260                 :             : 
     261                 :             :     /** Given a hash_type, find which of the 6 cache entries is to be used. */
     262                 :             :     int CacheIndex(int32_t hash_type) const noexcept;
     263                 :             : 
     264                 :             : public:
     265                 :             :     /** Load into writer the SHA256 midstate if found in this cache. */
     266                 :             :     [[nodiscard]] bool Load(int32_t hash_type, const CScript& script_code, HashWriter& writer) const noexcept;
     267                 :             :     /** Store into this cache object the provided SHA256 midstate. */
     268                 :             :     void Store(int32_t hash_type, const CScript& script_code, const HashWriter& writer) noexcept;
     269                 :             : };
     270                 :             : 
     271                 :             : template <class T>
     272                 :             : uint256 SignatureHash(const CScript& scriptCode, const T& txTo, unsigned int nIn, int32_t nHashType, const CAmount& amount, SigVersion sigversion, const PrecomputedTransactionData* cache = nullptr, SigHashCache* sighash_cache = nullptr);
     273                 :             : 
     274   [ +  -  +  - ]:      835535 : class BaseSignatureChecker
     275                 :             : {
     276                 :             : public:
     277                 :       11563 :     virtual bool CheckECDSASignature(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const
     278                 :             :     {
     279                 :       11563 :         return false;
     280                 :             :     }
     281                 :             : 
     282                 :           0 :     virtual bool CheckSchnorrSignature(std::span<const unsigned char> sig, std::span<const unsigned char> pubkey, SigVersion sigversion, ScriptExecutionData& execdata, ScriptError* serror = nullptr) const
     283                 :             :     {
     284                 :           0 :         return false;
     285                 :             :     }
     286                 :             : 
     287                 :          14 :     virtual bool CheckLockTime(const CScriptNum& nLockTime) const
     288                 :             :     {
     289                 :          14 :          return false;
     290                 :             :     }
     291                 :             : 
     292                 :          28 :     virtual bool CheckSequence(const CScriptNum& nSequence) const
     293                 :             :     {
     294                 :          28 :          return false;
     295                 :             :     }
     296                 :             : 
     297   [ +  +  +  + ]:      507905 :     virtual ~BaseSignatureChecker() = default;
                 [ +  - ]
     298                 :             : };
     299                 :             : 
     300                 :             : /** Enum to specify what *TransactionSignatureChecker's behavior should be
     301                 :             :  *  when dealing with missing transaction data.
     302                 :             :  */
     303                 :             : enum class MissingDataBehavior
     304                 :             : {
     305                 :             :     ASSERT_FAIL,  //!< Abort execution through assertion failure (for consensus code)
     306                 :             :     FAIL,         //!< Just act as if the signature was invalid
     307                 :             : };
     308                 :             : 
     309                 :             : template<typename T>
     310                 :             : bool SignatureHashSchnorr(uint256& hash_out, ScriptExecutionData& execdata, const T& tx_to, uint32_t in_pos, uint8_t hash_type, SigVersion sigversion, const PrecomputedTransactionData& cache, MissingDataBehavior mdb);
     311                 :             : 
     312                 :             : template <class T>
     313         [ +  + ]:      832109 : class GenericTransactionSignatureChecker : public BaseSignatureChecker
     314                 :             : {
     315                 :             : private:
     316                 :             :     const T* txTo;
     317                 :             :     const MissingDataBehavior m_mdb;
     318                 :             :     unsigned int nIn;
     319                 :             :     const CAmount amount;
     320                 :             :     const PrecomputedTransactionData* txdata;
     321                 :             :     mutable SigHashCache m_sighash_cache;
     322                 :             : 
     323                 :             : protected:
     324                 :             :     virtual bool VerifyECDSASignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
     325                 :             :     virtual bool VerifySchnorrSignature(std::span<const unsigned char> sig, const XOnlyPubKey& pubkey, const uint256& sighash) const;
     326                 :             : 
     327                 :             : public:
     328         [ +  - ]:      172341 :     GenericTransactionSignatureChecker(const T* txToIn, unsigned int nInIn, const CAmount& amountIn, MissingDataBehavior mdb) : txTo(txToIn), m_mdb(mdb), nIn(nInIn), amount(amountIn), txdata(nullptr) {}
     329         [ +  - ]:      657819 :     GenericTransactionSignatureChecker(const T* txToIn, unsigned int nInIn, const CAmount& amountIn, const PrecomputedTransactionData& txdataIn, MissingDataBehavior mdb) : txTo(txToIn), m_mdb(mdb), nIn(nInIn), amount(amountIn), txdata(&txdataIn) {}
     330                 :             :     bool CheckECDSASignature(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override;
     331                 :             :     bool CheckSchnorrSignature(std::span<const unsigned char> sig, std::span<const unsigned char> pubkey, SigVersion sigversion, ScriptExecutionData& execdata, ScriptError* serror = nullptr) const override;
     332                 :             :     bool CheckLockTime(const CScriptNum& nLockTime) const override;
     333                 :             :     bool CheckSequence(const CScriptNum& nSequence) const override;
     334                 :             : };
     335                 :             : 
     336                 :             : using TransactionSignatureChecker = GenericTransactionSignatureChecker<CTransaction>;
     337                 :             : using MutableTransactionSignatureChecker = GenericTransactionSignatureChecker<CMutableTransaction>;
     338                 :             : 
     339                 :      170399 : class DeferringSignatureChecker : public BaseSignatureChecker
     340                 :             : {
     341                 :             : protected:
     342                 :             :     const BaseSignatureChecker& m_checker;
     343                 :             : 
     344                 :             : public:
     345         [ +  - ]:      170399 :     DeferringSignatureChecker(const BaseSignatureChecker& checker) : m_checker(checker) {}
     346                 :             : 
     347                 :           0 :     bool CheckECDSASignature(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override
     348                 :             :     {
     349                 :           0 :         return m_checker.CheckECDSASignature(scriptSig, vchPubKey, scriptCode, sigversion);
     350                 :             :     }
     351                 :             : 
     352                 :         898 :     bool CheckSchnorrSignature(std::span<const unsigned char> sig, std::span<const unsigned char> pubkey, SigVersion sigversion, ScriptExecutionData& execdata, ScriptError* serror = nullptr) const override
     353                 :             :     {
     354                 :         898 :         return m_checker.CheckSchnorrSignature(sig, pubkey, sigversion, execdata, serror);
     355                 :             :     }
     356                 :             : 
     357                 :        9736 :     bool CheckLockTime(const CScriptNum& nLockTime) const override
     358                 :             :     {
     359                 :        9736 :         return m_checker.CheckLockTime(nLockTime);
     360                 :             :     }
     361                 :        9971 :     bool CheckSequence(const CScriptNum& nSequence) const override
     362                 :             :     {
     363                 :        9971 :         return m_checker.CheckSequence(nSequence);
     364                 :             :     }
     365                 :             : };
     366                 :             : 
     367                 :             : /** Compute the BIP341 tapleaf hash from leaf version & script. */
     368                 :             : uint256 ComputeTapleafHash(uint8_t leaf_version, std::span<const unsigned char> script);
     369                 :             : /** Compute the BIP341 tapbranch hash from two branches.
     370                 :             :   * Spans must be 32 bytes each. */
     371                 :             : uint256 ComputeTapbranchHash(std::span<const unsigned char> a, std::span<const unsigned char> b);
     372                 :             : /** Compute the BIP341 taproot script tree Merkle root from control block and leaf hash.
     373                 :             :  *  Requires control block to have valid length (33 + k*32, with k in {0,1,..,128}). */
     374                 :             : uint256 ComputeTaprootMerkleRoot(std::span<const unsigned char> control, const uint256& tapleaf_hash);
     375                 :             : 
     376                 :             : bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, script_verify_flags flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptExecutionData& execdata, ScriptError* error = nullptr);
     377                 :             : bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, script_verify_flags flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptError* error = nullptr);
     378                 :             : bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CScriptWitness* witness, script_verify_flags flags, const BaseSignatureChecker& checker, ScriptError* serror = nullptr);
     379                 :             : 
     380                 :             : size_t CountWitnessSigOps(const CScript& scriptSig, const CScript& scriptPubKey, const CScriptWitness* witness, script_verify_flags flags);
     381                 :             : 
     382                 :             : int FindAndDelete(CScript& script, const CScript& b);
     383                 :             : 
     384                 :             : extern const std::map<std::string, script_verify_flag_name> g_verify_flag_names;
     385                 :             : 
     386                 :             : std::vector<std::string> GetScriptFlagNames(script_verify_flags flags);
     387                 :             : 
     388                 :             : #endif // BITCOIN_SCRIPT_INTERPRETER_H
        

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