CScriptCompressor Class Reference

Compact serializer for scripts. More...

#include <script.h>

Collaboration diagram for CScriptCompressor:

Public Member Functions
	CScriptCompressor (CScript &scriptIn)
unsigned int	GetSerializeSize (int nType, int nVersion) const
template<typename Stream >
void	Serialize (Stream &s, int nType, int nVersion) const
template<typename Stream >
void	Unserialize (Stream &s, int nType, int nVersion)

Protected Member Functions
bool	IsToKeyID (CKeyID &hash) const
bool	IsToScriptID (CScriptID &hash) const
bool	IsToPubKey (CPubKey &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)

Private Attributes
CScript &	script

Static Private Attributes
static const unsigned int	nSpecialScripts = 6

Detailed Description

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.

Definition at line 728 of file script.h.

Constructor & Destructor Documentation

CScriptCompressor::CScriptCompressor ( CScript &  scriptIn )

inline

Definition at line 752 of file script.h.

Member Function Documentation

bool CScriptCompressor::Compress ( std::vector< unsigned char > &  out ) const

protected

Definition at line 1976 of file script.cpp.

References memcpy().

Referenced by GetSerializeSize(), and Serialize().

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bool CScriptCompressor::Decompress ( unsigned int  nSize, const std::vector< unsigned char > &  out  )

protected

Definition at line 2016 of file script.cpp.

References CPubKey::begin(), CPubKey::Decompress(), memcpy(), OP_CHECKSIG, OP_DUP, OP_EQUAL, OP_EQUALVERIFY, OP_HASH160, and CPubKey::size().

Referenced by Unserialize().

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unsigned int CScriptCompressor::GetSerializeSize ( int  nType, int  nVersion  ) const

inline

Definition at line 754 of file script.h.

References Compress(), nSpecialScripts, and VARINT.

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unsigned int CScriptCompressor::GetSpecialSize ( unsigned int  nSize ) const

protected

Definition at line 2007 of file script.cpp.

Referenced by Unserialize().

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bool CScriptCompressor::IsToKeyID ( CKeyID &  hash ) const

protected

Definition at line 1940 of file script.cpp.

References memcpy(), OP_CHECKSIG, OP_DUP, OP_EQUALVERIFY, and OP_HASH160.

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bool CScriptCompressor::IsToPubKey ( CPubKey &  pubkey ) const

protected

Definition at line 1961 of file script.cpp.

References CPubKey::IsFullyValid(), OP_CHECKSIG, and CPubKey::Set().

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bool CScriptCompressor::IsToScriptID ( CScriptID &  hash ) const

protected

Definition at line 1951 of file script.cpp.

References memcpy(), OP_EQUAL, and OP_HASH160.

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template<typename Stream >

void CScriptCompressor::Serialize ( Stream &  s, int  nType, int  nVersion  ) const

inline

Definition at line 763 of file script.h.

References Compress(), nSpecialScripts, and VARINT.

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template<typename Stream >

void CScriptCompressor::Unserialize ( Stream &  s, int  nType, int  nVersion  )

inline

Definition at line 775 of file script.h.

References Decompress(), GetSpecialSize(), nSpecialScripts, REF(), and VARINT.

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Member Data Documentation

const unsigned int CScriptCompressor::nSpecialScripts = 6

staticprivate

Definition at line 735 of file script.h.

Referenced by GetSerializeSize(), Serialize(), and Unserialize().

CScript& CScriptCompressor::script

private

Definition at line 737 of file script.h.

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The documentation for this class was generated from the following files:

• src/script.h
• src/script.cpp