iguana_interpreter.h

Go to the documentation of this file.

// Copyright (c) 2024 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef BITCOIN_IGUANA_IGUANA_INTERPRETER_H
#define BITCOIN_IGUANA_IGUANA_INTERPRETER_H
 
#include <script/interpreter.h>
#include <script/script.h>
 
#include <optional>
#include <string>
#include <vector>
 
enum class ScriptError;
 
struct IguanaStacks {
    std::vector<std::vector<uint8_t>> stack;
    std::vector<std::vector<uint8_t>> altstack;
};
 
struct IguanaTraceEntry {
    opcodetype opcode;
    std::vector<uint8_t> pushdata;
    IguanaStacks stacks;
};
 
struct IguanaTrace {
    std::vector<IguanaTraceEntry> entries;
    IguanaStacks initialStacks;
    std::string errorMsg;
    ScriptError scriptError;
};
 
struct IguanaResult {
    IguanaTrace traceScriptSig;
    IguanaTrace traceScriptPubKey;
    std::optional<IguanaTrace> traceRedeemScript;
    ScriptExecutionMetrics metrics;
};
 
class IguanaInterpreter {
private:
    CMutableTransaction tx;
    uint32_t inputIndex;
 
    CScript scriptPubKey;
 
    PrecomputedTransactionData txdata;
 
    MutableTransactionSignatureChecker sigChecker;
 
    uint32_t flags;
 
public:
    IguanaInterpreter(CMutableTransaction txIn, uint32_t inputIndexIn,
                      CTxOut spentOutput, uint32_t flagsIn)
        : tx(txIn), inputIndex(inputIndexIn),
          scriptPubKey(spentOutput.scriptPubKey), txdata(tx),
          sigChecker(&tx, inputIndex, spentOutput.nValue, txdata),
          flags(flagsIn) {}
 
    IguanaResult Run() const;
 
private:
    IguanaTrace RunScript(ScriptInterpreter &interpreter,
                          bool isPushOnly) const;
};
 
#endif // BITCOIN_IGUANA_IGUANA_INTERPRETER_H