uint256 Class Reference

256-bit opaque blob. More...

#include <uint256.h>

Inheritance diagram for uint256:

Collaboration diagram for uint256:

Public Member Functions
	uint256 ()
	uint256 (const std::vector< unsigned char > &vch)
uint64_t	GetCheapHash () const
	A cheap hash function that just returns 64 bits from the result, it can be used when the contents are considered uniformly random. More...
Public Member Functions inherited from base_blob< 256 >
	base_blob ()
	base_blob (const std::vector< unsigned char > &vch)
bool	IsNull () const
void	SetNull ()
int	Compare (const base_blob &other) const
std::string	GetHex () const
void	SetHex (const char *psz)
void	SetHex (const std::string &str)
std::string	ToString () const
unsigned char *	begin ()
const unsigned char *	begin () const
unsigned char *	end ()
const unsigned char *	end () const
unsigned int	size () const
uint64_t	GetUint64 (int pos) const
void	Serialize (Stream &s) const
void	Unserialize (Stream &s)

Additional Inherited Members
Protected Attributes inherited from base_blob< 256 >
uint8_t	data [WIDTH]
Static Protected Attributes inherited from base_blob< 256 >
static constexpr int	WIDTH

Detailed Description

256-bit opaque blob.

Note

This type is called uint256 for historical reasons only. It is an opaque blob of 256 bits and has no integer operations. Use arith_uint256 if those are required.

Definition at line 123 of file uint256.h.

Constructor & Destructor Documentation

uint256() [1/2]

uint256::uint256 ( )

inline

Definition at line 125 of file uint256.h.

uint256() [2/2]

uint256::uint256 ( const std::vector< unsigned char > &  vch )

inlineexplicit

Definition at line 126 of file uint256.h.

Member Function Documentation

GetCheapHash()

uint64_t uint256::GetCheapHash ( ) const

inline

A cheap hash function that just returns 64 bits from the result, it can be used when the contents are considered uniformly random.

It is not appropriate when the value can easily be influenced from outside as e.g. a network adversary could provide values to trigger worst-case behavior.

Definition at line 133 of file uint256.h.

References base_blob< 256 >::data, and ReadLE64().

Referenced by CWallet::IsFullyMixed(), BlockHasher::operator()(), and std::hash< uint256 >::operator()().

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

• src/uint256.h