Class CScript

src/script/script.h:405–575

Serialized script, used inside transaction inputs and outputs */

/** Serialized script, used inside transaction inputs and outputs */
class CScript : public CScriptBase
{
private:
    inline void AppendDataSize(const uint32_t size)
    {
        if (size < OP_PUSHDATA1) {
            insert(end(), static_cast<value_type>(size));
        } else if (size <= 0xff) {
            insert(end(), OP_PUSHDATA1);
            insert(end(), static_cast<value_type>(size));
        } else if (size <= 0xffff) {
            insert(end(), OP_PUSHDATA2);
            value_type data[2];
            WriteLE16(data, size);
            insert(end(), std::cbegin(data), std::cend(data));
        } else {
            insert(end(), OP_PUSHDATA4);
            value_type data[4];
            WriteLE32(data, size);
            insert(end(), std::cbegin(data), std::cend(data));
        }
    }

    void AppendData(std::span<const value_type> data)
    {
        insert(end(), data.begin(), data.end());
    }

protected:
    CScript& push_int64(int64_t n)
    {
        if (n == -1 || (n >= 1 && n <= 16))
        {
            push_back(n + (OP_1 - 1));
        }
        else if (n == 0)
        {
            push_back(OP_0);
        }
        else
        {
            *this << CScriptNum::serialize(n);
        }
        return *this;
    }

public:
    CScript() = default;
    template <std::input_iterator InputIterator>
    CScript(InputIterator first, InputIterator last) : CScriptBase{first, last} { }

    SERIALIZE_METHODS(CScript, obj) { READWRITE(AsBase<CScriptBase>(obj)); }

    explicit CScript(int64_t b) { operator<<(b); }
    explicit CScript(opcodetype b)     { operator<<(b); }
    explicit CScript(const CScriptNum& b) { operator<<(b); }
    // delete non-existent constructor to defend against future introduction
    // e.g. via prevector