CTxIn Class Reference

An input of a transaction. More...

#include <transaction.h>

Collaboration diagram for CTxIn:

Public Member Functions
	CTxIn ()
	CTxIn (COutPoint prevoutIn, CScript scriptSigIn=CScript(), uint32_t nSequenceIn=SEQUENCE_FINAL)
	CTxIn (Txid hashPrevTx, uint32_t nOut, CScript scriptSigIn=CScript(), uint32_t nSequenceIn=SEQUENCE_FINAL)
	SERIALIZE_METHODS (CTxIn, obj)
std::string	ToString () const

Public Attributes
COutPoint	prevout
CScript	scriptSig
uint32_t	nSequence
CScriptWitness	scriptWitness
	Only serialized through CTransaction. More...

Static Public Attributes
static const uint32_t	SEQUENCE_FINAL = 0xffffffff
	Setting nSequence to this value for every input in a transaction disables nLockTime/IsFinalTx(). More...
static const uint32_t	MAX_SEQUENCE_NONFINAL {SEQUENCE_FINAL - 1}
	This is the maximum sequence number that enables both nLockTime and OP_CHECKLOCKTIMEVERIFY (BIP 65). More...
static const uint32_t	SEQUENCE_LOCKTIME_DISABLE_FLAG = (1U << 31)
	If this flag is set, CTxIn::nSequence is NOT interpreted as a relative lock-time. More...
static const uint32_t	SEQUENCE_LOCKTIME_TYPE_FLAG = (1 << 22)
	If CTxIn::nSequence encodes a relative lock-time and this flag is set, the relative lock-time has units of 512 seconds, otherwise it specifies blocks with a granularity of 1. More...
static const uint32_t	SEQUENCE_LOCKTIME_MASK = 0x0000ffff
	If CTxIn::nSequence encodes a relative lock-time, this mask is applied to extract that lock-time from the sequence field. More...
static const int	SEQUENCE_LOCKTIME_GRANULARITY = 9
	In order to use the same number of bits to encode roughly the same wall-clock duration, and because blocks are naturally limited to occur every 600s on average, the minimum granularity for time-based relative lock-time is fixed at 512 seconds. More...

Friends
bool	operator== (const CTxIn &a, const CTxIn &b)
bool	operator!= (const CTxIn &a, const CTxIn &b)

Detailed Description

An input of a transaction.

It contains the location of the previous transaction's output that it claims and a signature that matches the output's public key.

Definition at line 66 of file transaction.h.

Constructor & Destructor Documentation

CTxIn() [1/3]

CTxIn::CTxIn ( )

inline

Definition at line 121 of file transaction.h.

CTxIn() [2/3]

CTxIn::CTxIn ( COutPoint  prevoutIn, CScript  scriptSigIn = CScript(), uint32_t  nSequenceIn = SEQUENCE_FINAL  )

explicit

Definition at line 26 of file transaction.cpp.

CTxIn() [3/3]

CTxIn::CTxIn	(	Txid	hashPrevTx,
		uint32_t	nOut,
		CScript	scriptSigIn = CScript(),
		uint32_t	nSequenceIn = SEQUENCE_FINAL
	)

Definition at line 33 of file transaction.cpp.

Member Function Documentation

SERIALIZE_METHODS()

CTxIn::SERIALIZE_METHODS ( CTxIn  , obj    )

inline

Definition at line 129 of file transaction.h.

ToString()

std::string CTxIn::ToString

(

)

const

Definition at line 40 of file transaction.cpp.

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Friends And Related Function Documentation

operator!=

bool operator!= ( const CTxIn &  a, const CTxIn &  b  )

friend

Definition at line 138 of file transaction.h.

operator==

bool operator== ( const CTxIn &  a, const CTxIn &  b  )

friend

Definition at line 131 of file transaction.h.

Member Data Documentation

MAX_SEQUENCE_NONFINAL

const uint32_t CTxIn::MAX_SEQUENCE_NONFINAL {SEQUENCE_FINAL - 1}

static

This is the maximum sequence number that enables both nLockTime and OP_CHECKLOCKTIMEVERIFY (BIP 65).

It has SEQUENCE_LOCKTIME_DISABLE_FLAG set (BIP 68/112).

Definition at line 87 of file transaction.h.

nSequence

uint32_t CTxIn::nSequence

Definition at line 71 of file transaction.h.

prevout

COutPoint CTxIn::prevout

Definition at line 69 of file transaction.h.

scriptSig

CScript CTxIn::scriptSig

Definition at line 70 of file transaction.h.

scriptWitness

CScriptWitness CTxIn::scriptWitness

Only serialized through CTransaction.

Definition at line 72 of file transaction.h.

SEQUENCE_FINAL

const uint32_t CTxIn::SEQUENCE_FINAL = 0xffffffff

static

Setting nSequence to this value for every input in a transaction disables nLockTime/IsFinalTx().

It fails OP_CHECKLOCKTIMEVERIFY/CheckLockTime() for any input that has it set (BIP 65). It has SEQUENCE_LOCKTIME_DISABLE_FLAG set (BIP 68/112).

Definition at line 81 of file transaction.h.

SEQUENCE_LOCKTIME_DISABLE_FLAG

const uint32_t CTxIn::SEQUENCE_LOCKTIME_DISABLE_FLAG = (1U << 31)

static

If this flag is set, CTxIn::nSequence is NOT interpreted as a relative lock-time.

It skips SequenceLocks() for any input that has it set (BIP 68). It fails OP_CHECKSEQUENCEVERIFY/CheckSequence() for any input that has it set (BIP 112).

Definition at line 98 of file transaction.h.

SEQUENCE_LOCKTIME_GRANULARITY

const int CTxIn::SEQUENCE_LOCKTIME_GRANULARITY = 9

static

In order to use the same number of bits to encode roughly the same wall-clock duration, and because blocks are naturally limited to occur every 600s on average, the minimum granularity for time-based relative lock-time is fixed at 512 seconds.

Converting from CTxIn::nSequence to seconds is performed by multiplying by 512 = 2^9, or equivalently shifting up by 9 bits.

Definition at line 119 of file transaction.h.

SEQUENCE_LOCKTIME_MASK

const uint32_t CTxIn::SEQUENCE_LOCKTIME_MASK = 0x0000ffff

static

If CTxIn::nSequence encodes a relative lock-time, this mask is applied to extract that lock-time from the sequence field.

Definition at line 109 of file transaction.h.

SEQUENCE_LOCKTIME_TYPE_FLAG

const uint32_t CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG = (1 << 22)

static

If CTxIn::nSequence encodes a relative lock-time and this flag is set, the relative lock-time has units of 512 seconds, otherwise it specifies blocks with a granularity of 1.

Definition at line 104 of file transaction.h.

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

• src/primitives/transaction.h
• src/primitives/transaction.cpp