#ifndef H_BITCOIN_SCRIPT
#define H_BITCOIN_SCRIPT
-#include "base58.h"
-
#include <string>
#include <vector>
#include <boost/foreach.hpp>
+#include <boost/variant.hpp>
+
+#include "keystore.h"
+#include "bignum.h"
+class CCoins;
class CTransaction;
-class CKeyStore;
+
+static const unsigned int MAX_SCRIPT_ELEMENT_SIZE = 520; // bytes
/** Signature hash types/flags */
enum
SIGHASH_ANYONECANPAY = 0x80,
};
+/** Script verification flags */
+enum
+{
+ SCRIPT_VERIFY_NONE = 0,
+ SCRIPT_VERIFY_P2SH = (1U << 0),
+ SCRIPT_VERIFY_STRICTENC = (1U << 1),
+ SCRIPT_VERIFY_NOCACHE = (1U << 2),
+};
enum txnouttype
{
TX_MULTISIG,
};
+class CNoDestination {
+public:
+ friend bool operator==(const CNoDestination &a, const CNoDestination &b) { return true; }
+ friend bool operator<(const CNoDestination &a, const CNoDestination &b) { return true; }
+};
+
+/** A txout script template with a specific destination. It is either:
+ * * CNoDestination: no destination set
+ * * CKeyID: TX_PUBKEYHASH destination
+ * * CScriptID: TX_SCRIPTHASH destination
+ * A CTxDestination is the internal data type encoded in a CBitcoinAddress
+ */
+typedef boost::variant<CNoDestination, CKeyID, CScriptID> CTxDestination;
+
const char* GetTxnOutputType(txnouttype t);
/** Script opcodes */
return *this;
}
+ CScript& operator<<(const CPubKey& key)
+ {
+ std::vector<unsigned char> vchKey = key.Raw();
+ return (*this) << vchKey;
+ }
+
CScript& operator<<(const CBigNum& b)
{
*this << b.getvch();
{
// I'm not sure if this should push the script or concatenate scripts.
// If there's ever a use for pushing a script onto a script, delete this member fn
- assert(!"warning: pushing a CScript onto a CScript with << is probably not intended, use + to concatenate");
+ assert(!"Warning: Pushing a CScript onto a CScript with << is probably not intended, use + to concatenate!");
return *this;
}
// Immediate operand
if (opcode <= OP_PUSHDATA4)
{
- unsigned int nSize;
+ unsigned int nSize = 0;
if (opcode < OP_PUSHDATA1)
{
nSize = opcode;
memcpy(&nSize, &pc[0], 4);
pc += 4;
}
- if (end() - pc < nSize)
+ if (end() - pc < 0 || (unsigned int)(end() - pc) < nSize)
return false;
if (pvchRet)
pvchRet->assign(pc, pc + nSize);
}
- void SetBitcoinAddress(const CBitcoinAddress& address);
- void SetBitcoinAddress(const std::vector<unsigned char>& vchPubKey)
- {
- SetBitcoinAddress(CBitcoinAddress(vchPubKey));
- }
+ void SetDestination(const CTxDestination& address);
void SetMultisig(int nRequired, const std::vector<CKey>& keys);
- void SetPayToScriptHash(const CScript& subscript);
void PrintHex() const
{
printf("%s\n", ToString().c_str());
}
+
+ CScriptID GetID() const
+ {
+ return CScriptID(Hash160(*this));
+ }
};
+/** Compact serializer for scripts.
+ *
+ * It detects common cases and encodes them much more efficiently.
+ * 3 special cases are defined:
+ * * Pay to pubkey hash (encoded as 21 bytes)
+ * * Pay to script hash (encoded as 21 bytes)
+ * * Pay to pubkey starting with 0x02, 0x03 or 0x04 (encoded as 33 bytes)
+ *
+ * Other scripts up to 121 bytes require 1 byte + script length. Above
+ * that, scripts up to 16505 bytes require 2 bytes + script length.
+ */
+class CScriptCompressor
+{
+private:
+ // make this static for now (there are only 6 special scripts defined)
+ // this can potentially be extended together with a new nVersion for
+ // transactions, in which case this value becomes dependent on nVersion
+ // and nHeight of the enclosing transaction.
+ static const unsigned int nSpecialScripts = 6;
+
+ CScript &script;
+protected:
+ // These check for scripts for which a special case with a shorter encoding is defined.
+ // They are implemented separately from the CScript test, as these test for exact byte
+ // sequence correspondences, and are more strict. For example, IsToPubKey also verifies
+ // whether the public key is valid (as invalid ones cannot be represented in compressed
+ // form).
+ bool IsToKeyID(CKeyID &hash) const;
+ bool IsToScriptID(CScriptID &hash) const;
+ bool IsToPubKey(std::vector<unsigned char> &pubkey) const;
+
+ bool Compress(std::vector<unsigned char> &out) const;
+ unsigned int GetSpecialSize(unsigned int nSize) const;
+ bool Decompress(unsigned int nSize, const std::vector<unsigned char> &out);
+public:
+ CScriptCompressor(CScript &scriptIn) : script(scriptIn) { }
+
+ unsigned int GetSerializeSize(int nType, int nVersion) const {
+ std::vector<unsigned char> compr;
+ if (Compress(compr))
+ return compr.size();
+ unsigned int nSize = script.size() + nSpecialScripts;
+ return script.size() + VARINT(nSize).GetSerializeSize(nType, nVersion);
+ }
+ template<typename Stream>
+ void Serialize(Stream &s, int nType, int nVersion) const {
+ std::vector<unsigned char> compr;
+ if (Compress(compr)) {
+ s << CFlatData(&compr[0], &compr[compr.size()]);
+ return;
+ }
+ unsigned int nSize = script.size() + nSpecialScripts;
+ s << VARINT(nSize);
+ s << CFlatData(&script[0], &script[script.size()]);
+ }
+ template<typename Stream>
+ void Unserialize(Stream &s, int nType, int nVersion) {
+ unsigned int nSize = 0;
+ s >> VARINT(nSize);
+ if (nSize < nSpecialScripts) {
+ std::vector<unsigned char> vch(GetSpecialSize(nSize), 0x00);
+ s >> REF(CFlatData(&vch[0], &vch[vch.size()]));
+ Decompress(nSize, vch);
+ return;
+ }
+ nSize -= nSpecialScripts;
+ script.resize(nSize);
+ s >> REF(CFlatData(&script[0], &script[script.size()]));
+ }
+};
+bool IsCanonicalPubKey(const std::vector<unsigned char> &vchPubKey);
+bool IsCanonicalSignature(const std::vector<unsigned char> &vchSig);
-bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType);
+bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType);
bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet);
int ScriptSigArgsExpected(txnouttype t, const std::vector<std::vector<unsigned char> >& vSolutions);
bool IsStandard(const CScript& scriptPubKey);
bool IsMine(const CKeyStore& keystore, const CScript& scriptPubKey);
-bool ExtractAddress(const CScript& scriptPubKey, CBitcoinAddress& addressRet);
-bool ExtractAddresses(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CBitcoinAddress>& addressRet, int& nRequiredRet);
+bool IsMine(const CKeyStore& keystore, const CTxDestination &dest);
+bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet);
+bool ExtractDestinations(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CTxDestination>& addressRet, int& nRequiredRet);
+bool SignSignature(const CKeyStore& keystore, const CScript& fromPubKey, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL);
bool SignSignature(const CKeyStore& keystore, const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL);
-bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, bool fValidatePayToScriptHash, int nHashType);
+bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType);
+
+// Given two sets of signatures for scriptPubKey, possibly with OP_0 placeholders,
+// combine them intelligently and return the result.
+CScript CombineSignatures(CScript scriptPubKey, const CTransaction& txTo, unsigned int nIn, const CScript& scriptSig1, const CScript& scriptSig2);
#endif
projects / VerusCoin.git / blobdiff