diff options
Diffstat (limited to 'src/script/script.h')
| -rw-r--r-- | src/script/script.h | 47 |
1 files changed, 36 insertions, 11 deletions
diff --git a/src/script/script.h b/src/script/script.h index d5045005b..3650957fc 100644 --- a/src/script/script.h +++ b/src/script/script.h @@ -7,6 +7,7 @@ #define BITCOIN_SCRIPT_SCRIPT_H #include "crypto/common.h" +#include "prevector.h" #include <assert.h> #include <climits> @@ -17,7 +18,18 @@ #include <string> #include <vector> -static const unsigned int MAX_SCRIPT_ELEMENT_SIZE = 520; // bytes +// Maximum number of bytes pushable to the stack +static const unsigned int MAX_SCRIPT_ELEMENT_SIZE = 520; + +// Maximum number of non-push operations per script +static const int MAX_OPS_PER_SCRIPT = 201; + +// Maximum number of public keys per multisig +static const int MAX_PUBKEYS_PER_MULTISIG = 20; + +// Threshold for nLockTime: below this value it is interpreted as block number, +// otherwise as UNIX timestamp. +static const unsigned int LOCKTIME_THRESHOLD = 500000000; // Tue Nov 5 00:53:20 1985 UTC template <typename T> std::vector<unsigned char> ToByteVector(const T& in) @@ -151,6 +163,7 @@ enum opcodetype // expansion OP_NOP1 = 0xb0, OP_NOP2 = 0xb1, + OP_CHECKLOCKTIMEVERIFY = OP_NOP2, OP_NOP3 = 0xb2, OP_NOP4 = 0xb3, OP_NOP5 = 0xb4, @@ -162,7 +175,6 @@ enum opcodetype // template matching params - OP_SMALLDATA = 0xf9, OP_SMALLINTEGER = 0xfa, OP_PUBKEYS = 0xfb, OP_PUBKEYHASH = 0xfd, @@ -196,7 +208,10 @@ public: m_value = n; } - explicit CScriptNum(const std::vector<unsigned char>& vch, bool fRequireMinimal) + static const size_t nDefaultMaxNumSize = 4; + + explicit CScriptNum(const std::vector<unsigned char>& vch, bool fRequireMinimal, + const size_t nMaxNumSize = nDefaultMaxNumSize) { if (vch.size() > nMaxNumSize) { throw scriptnum_error("script number overflow"); @@ -319,8 +334,6 @@ public: return result; } - static const size_t nMaxNumSize = 4; - private: static int64_t set_vch(const std::vector<unsigned char>& vch) { @@ -342,8 +355,10 @@ private: int64_t m_value; }; +typedef prevector<28, unsigned char> CScriptBase; + /** Serialized script, used inside transaction inputs and outputs */ -class CScript : public std::vector<unsigned char> +class CScript : public CScriptBase { protected: CScript& push_int64(int64_t n) @@ -364,9 +379,10 @@ protected: } public: CScript() { } - CScript(const CScript& b) : std::vector<unsigned char>(b.begin(), b.end()) { } - CScript(const_iterator pbegin, const_iterator pend) : std::vector<unsigned char>(pbegin, pend) { } - CScript(const unsigned char* pbegin, const unsigned char* pend) : std::vector<unsigned char>(pbegin, pend) { } + CScript(const CScript& b) : CScriptBase(b.begin(), b.end()) { } + CScript(const_iterator pbegin, const_iterator pend) : CScriptBase(pbegin, pend) { } + CScript(std::vector<unsigned char>::const_iterator pbegin, std::vector<unsigned char>::const_iterator pend) : CScriptBase(pbegin, pend) { } + CScript(const unsigned char* pbegin, const unsigned char* pend) : CScriptBase(pbegin, pend) { } CScript& operator+=(const CScript& b) { @@ -583,6 +599,7 @@ public: bool IsPayToScriptHash() const; /** Called by IsStandardTx and P2SH/BIP62 VerifyScript (which makes it consensus-critical). */ + bool IsPushOnly(const_iterator pc) const; bool IsPushOnly() const; /** @@ -595,12 +612,20 @@ public: return (size() > 0 && *begin() == OP_RETURN); } - std::string ToString() const; void clear() { // The default std::vector::clear() does not release memory. - std::vector<unsigned char>().swap(*this); + CScriptBase().swap(*this); } }; +class CReserveScript +{ +public: + CScript reserveScript; + virtual void KeepScript() {} + CReserveScript() {} + virtual ~CReserveScript() {} +}; + #endif // BITCOIN_SCRIPT_SCRIPT_H |