src/script/standard.h

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2016 The Bitcoin Core developers
   3 // Distributed under the MIT software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #ifndef BITCOIN_SCRIPT_STANDARD_H
   7 #define BITCOIN_SCRIPT_STANDARD_H
   8
   9 #include "script/interpreter.h"
  10 #include "uint256.h"
  11
  12 #include <boost/variant.hpp>
  13
  14 #include <stdint.h>
  15
  16 static const bool DEFAULT_ACCEPT_DATACARRIER = true;
  17
  18 class CKeyID;
  19 class CScript;
  20
  21 /** A reference to a CScript: the Hash160 of its serialization (see script.h) */
  22 class CScriptID : public uint160
  23 {
  24 public:
  25     CScriptID() : uint160() {}
  26     CScriptID(const CScript& in);
  27     CScriptID(const uint160& in) : uint160(in) {}
  28 };
  29
  30 static const unsigned int MAX_OP_RETURN_RELAY = 83; //!< bytes (+1 for OP_RETURN, +2 for the pushdata opcodes)
  31 extern bool fAcceptDatacarrier;
  32 extern unsigned nMaxDatacarrierBytes;
  33
  34 /**
  35  * Mandatory script verification flags that all new blocks must comply with for
  36  * them to be valid. (but old blocks may not comply with) Currently just P2SH,
  37  * but in the future other flags may be added, such as a soft-fork to enforce
  38  * strict DER encoding.
  39  *
  40  * Failing one of these tests may trigger a DoS ban - see CheckInputs() for
  41  * details.
  42  */
  43 static const unsigned int MANDATORY_SCRIPT_VERIFY_FLAGS = SCRIPT_VERIFY_P2SH;
  44
  45 enum txnouttype
  46 {
  47     TX_NONSTANDARD,
  48     // 'standard' transaction types:
  49     TX_PUBKEY,
  50     TX_PUBKEYHASH,
  51     TX_SCRIPTHASH,
  52     TX_MULTISIG,
  53     TX_NULL_DATA,
  54     TX_WITNESS_V0_SCRIPTHASH,
  55     TX_WITNESS_V0_KEYHASH,
  56 };
  57
  58 class CNoDestination {
  59 public:
  60     friend bool operator==(const CNoDestination &a, const CNoDestination &b) { return true; }
  61     friend bool operator<(const CNoDestination &a, const CNoDestination &b) { return true; }
  62 };
  63
  64 /**
  65  * A txout script template with a specific destination. It is either:
  66  *  * CNoDestination: no destination set
  67  *  * CKeyID: TX_PUBKEYHASH destination
  68  *  * CScriptID: TX_SCRIPTHASH destination
  69  *  A CTxDestination is the internal data type encoded in a CBitcoinAddress
  70  */
  71 typedef boost::variant<CNoDestination, CKeyID, CScriptID> CTxDestination;
  72
  73 const char* GetTxnOutputType(txnouttype t);
  74
  75 bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet);
  76 bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet);
  77 bool ExtractDestinations(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CTxDestination>& addressRet, int& nRequiredRet);
  78
  79 CScript GetScriptForDestination(const CTxDestination& dest);
  80 CScript GetScriptForRawPubKey(const CPubKey& pubkey);
  81 CScript GetScriptForMultisig(int nRequired, const std::vector<CPubKey>& keys);
  82 CScript GetScriptForWitness(const CScript& redeemscript);
  83
  84 #endif // BITCOIN_SCRIPT_STANDARD_H