Function ParseScript

src/core_io.cpp:92–131

} // namespace

CScript ParseScript(const std::string& s)
{
    CScript result;

    std::vector<std::string> words = SplitString(s, " \t\n");

    for (const std::string& w : words) {
        if (w.empty()) {
            // Empty string, ignore. (SplitString doesn't combine multiple separators)
        } else if (std::all_of(w.begin(), w.end(), ::IsDigit) ||
                   (w.front() == '-' && w.size() > 1 && std::all_of(w.begin() + 1, w.end(), ::IsDigit)))
        {
            // Number
            const auto num{ToIntegral<int64_t>(w)};

            // limit the range of numbers ParseScript accepts in decimal
            // since numbers outside -0xFFFFFFFF...0xFFFFFFFF are illegal in scripts
            if (!num.has_value() || num > int64_t{0xffffffff} || num < -1 * int64_t{0xffffffff}) {
                throw std::runtime_error("script parse error: decimal numeric value only allowed in the "
                                         "range -0xFFFFFFFF...0xFFFFFFFF");
            }

            result << num.value();
        } else if (w.starts_with("0x") && w.size() > 2 && IsHex(std::string(w.begin() + 2, w.end()))) {
            // Raw hex data, inserted NOT pushed onto stack:
            std::vector<unsigned char> raw = ParseHex(std::string(w.begin() + 2, w.end()));
            result.insert(result.end(), raw.begin(), raw.end());
        } else if (w.size() >= 2 && w.front() == '\'' && w.back() == '\'') {
            // Single-quoted string, pushed as data. NOTE: this is poor-man's
            // parsing, spaces/tabs/newlines in single-quoted strings won't work.
            std::vector<unsigned char> value(w.begin() + 1, w.end() - 1);
            result << value;
        } else {
            // opcode, e.g. OP_ADD or ADD:
            result << ParseOpCode(w);
        }
    }

    return result;
}

/// Check that all of the input and output scripts of a transaction contain valid opcodes
static bool CheckTxScriptsSanity(const CMutableTransaction& tx)