#include <pubkey.h>
#include <script/interpreter.h>
#include <uint256.h>
#include <util/hash_type.h>
#include <map>
#include <string>
#include <variant>

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Classes
class	CScriptID
	A reference to a CScript: the Hash160 of its serialization (see script.h) More...

class	CNoDestination

struct	PKHash

struct	ScriptHash

struct	WitnessV0ScriptHash

struct	WitnessV0KeyHash

struct	WitnessV1Taproot

struct	WitnessUnknown
	CTxDestination subtype to encode any future Witness version. More...

struct	ShortestVectorFirstComparator

struct	TaprootSpendData

class	TaprootBuilder
	Utility class to construct Taproot outputs from internal key and script tree. More...

struct	TaprootBuilder::LeafInfo
	Information about a tracked leaf in the Merkle tree. More...

struct	TaprootBuilder::NodeInfo
	Information associated with a node in the Merkle tree. More...

Typedefs
using	CTxDestination = std::variant< CNoDestination, PKHash, ScriptHash, WitnessV0ScriptHash, WitnessV0KeyHash, WitnessV1Taproot, WitnessUnknown >
	A txout script template with a specific destination. More...

Enumerations
enum	TxoutType { TxoutType::NONSTANDARD, TxoutType::PUBKEY, TxoutType::PUBKEYHASH, TxoutType::SCRIPTHASH, TxoutType::MULTISIG, TxoutType::NULL_DATA, TxoutType::WITNESS_V0_SCRIPTHASH, TxoutType::WITNESS_V0_KEYHASH, TxoutType::WITNESS_V1_TAPROOT, TxoutType::WITNESS_UNKNOWN }

Functions
CKeyID	ToKeyID (const PKHash &key_hash)

CKeyID	ToKeyID (const WitnessV0KeyHash &key_hash)

bool	IsValidDestination (const CTxDestination &dest)
	Check whether a CTxDestination is a CNoDestination. More...

std::string	GetTxnOutputType (TxoutType t)
	Get the name of a TxoutType as a string. More...

TxoutType	Solver (const CScript &scriptPubKey, std::vector< std::vector< unsigned char >> &vSolutionsRet)
	Parse a scriptPubKey and identify script type for standard scripts. More...

bool	ExtractDestination (const CScript &scriptPubKey, CTxDestination &addressRet)
	Parse a standard scriptPubKey for the destination address. More...

bool	ExtractDestinations (const CScript &scriptPubKey, TxoutType &typeRet, std::vector< CTxDestination > &addressRet, int &nRequiredRet)
	Parse a standard scriptPubKey with one or more destination addresses. More...

CScript	GetScriptForDestination (const CTxDestination &dest)
	Generate a Bitcoin scriptPubKey for the given CTxDestination. More...

CScript	GetScriptForRawPubKey (const CPubKey &pubkey)
	Generate a P2PK script for the given pubkey. More...

CScript	GetScriptForMultisig (int nRequired, const std::vector< CPubKey > &keys)
	Generate a multisig script. More...

std::optional< std::vector< std::tuple< int, CScript, int > > >	InferTaprootTree (const TaprootSpendData &spenddata, const XOnlyPubKey &output)
	Given a TaprootSpendData and the output key, reconstruct its script tree. More...

Variables
static const bool	DEFAULT_ACCEPT_DATACARRIER = true

static const unsigned int	MAX_OP_RETURN_RELAY = 83
	Default setting for nMaxDatacarrierBytes. More...

bool	fAcceptDatacarrier
	A data carrying output is an unspendable output containing data. More...

unsigned	nMaxDatacarrierBytes
	Maximum size of TxoutType::NULL_DATA scripts that this node considers standard. More...

static const unsigned int	MANDATORY_SCRIPT_VERIFY_FLAGS = SCRIPT_VERIFY_P2SH
	Mandatory script verification flags that all new blocks must comply with for them to be valid. More...

Typedef Documentation

◆ CTxDestination

using CTxDestination = std::variant<CNoDestination, PKHash, ScriptHash, WitnessV0ScriptHash, WitnessV0KeyHash, WitnessV1Taproot, WitnessUnknown>

A txout script template with a specific destination.

It is either:

CNoDestination: no destination set
PKHash: TxoutType::PUBKEYHASH destination (P2PKH)
ScriptHash: TxoutType::SCRIPTHASH destination (P2SH)
WitnessV0ScriptHash: TxoutType::WITNESS_V0_SCRIPTHASH destination (P2WSH)
WitnessV0KeyHash: TxoutType::WITNESS_V0_KEYHASH destination (P2WPKH)
WitnessV1Taproot: TxoutType::WITNESS_V1_TAPROOT destination (P2TR)
WitnessUnknown: TxoutType::WITNESS_UNKNOWN destination (P2W???) A CTxDestination is the internal data type encoded in a bitcoin address

Definition at line 157 of file standard.h.

Enumeration Type Documentation

◆ TxoutType

enum TxoutType

strong

Enumerator
NONSTANDARD
PUBKEY
PUBKEYHASH
SCRIPTHASH
MULTISIG
NULL_DATA	unspendable OP_RETURN script that carries data
WITNESS_V0_SCRIPTHASH
WITNESS_V0_KEYHASH
WITNESS_V1_TAPROOT
WITNESS_UNKNOWN	Only for Witness versions not already defined above.

Definition at line 59 of file standard.h.

Function Documentation

◆ ExtractDestination()

bool ExtractDestination	(	const CScript &	scriptPubKey,
		CTxDestination &	addressRet
	)

Parse a standard scriptPubKey for the destination address.

Assigns result to the addressRet parameter and returns true if successful. For multisig scripts, instead use ExtractDestinations. Currently only works for P2PK, P2PKH, P2SH, P2WPKH, and P2WSH scripts.

Definition at line 213 of file standard.cpp.

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◆ ExtractDestinations()

bool ExtractDestinations	(	const CScript &	scriptPubKey,
		TxoutType &	typeRet,
		std::vector< CTxDestination > &	addressRet,
		int &	nRequiredRet
	)

Parse a standard scriptPubKey with one or more destination addresses.

For multisig scripts, this populates the addressRet vector with the pubkey IDs and nRequiredRet with the n required to spend. For other destinations, addressRet is populated with a single value and nRequiredRet is set to 1. Returns true if successful.

Note: this function confuses destinations (a subset of CScripts that are encodable as an address) with key identifiers (of keys involved in a CScript), and its use should be phased out.

TODO: from v23 ("addresses" and "reqSigs" deprecated) "ExtractDestinations" should be removed

Definition at line 270 of file standard.cpp.

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◆ GetScriptForDestination()

CScript GetScriptForDestination ( const CTxDestination & dest )

Generate a Bitcoin scriptPubKey for the given CTxDestination.

Returns a P2PKH script for a CKeyID destination, a P2SH script for a CScriptID, and an empty script for CNoDestination.

Definition at line 351 of file standard.cpp.

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◆ GetScriptForMultisig()

CScript GetScriptForMultisig	(	int	nRequired,
		const std::vector< CPubKey > &	keys
	)

Generate a multisig script.

Definition at line 361 of file standard.cpp.

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◆ GetScriptForRawPubKey()

CScript GetScriptForRawPubKey ( const CPubKey & pubkey )

Generate a P2PK script for the given pubkey.

Definition at line 356 of file standard.cpp.

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◆ GetTxnOutputType()

std::string GetTxnOutputType ( TxoutType t )

Get the name of a TxoutType as a string.

Definition at line 49 of file standard.cpp.

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◆ InferTaprootTree()

std::optional<std::vector<std::tuple<int, CScript, int> > > InferTaprootTree	(	const TaprootSpendData &	spenddata,
		const XOnlyPubKey &	output
	)

Given a TaprootSpendData and the output key, reconstruct its script tree.

If the output doesn't match the spenddata, or if the data in spenddata is incomplete, std::nullopt is returned. Otherwise, a vector of (depth, script, leaf_ver) tuples is returned, corresponding to a depth-first traversal of the script tree.

Data structure to represent the nodes of the tree we're going to build.

Hash of this node, if known; 0 otherwise.

The left and right subtrees (note that their order is irrelevant).

If this is known to be a leaf node, a pointer to the (script, leaf_ver) pair. nullptr otherwise.

Whether or not this node has been explored (is known to be a leaf, or known to have children).

Whether or not this node is an inner node (unknown until explored = true).

Whether or not we have produced output for this subtree.

Definition at line 530 of file standard.cpp.

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◆ IsValidDestination()

bool IsValidDestination ( const CTxDestination & dest )

Check whether a CTxDestination is a CNoDestination.

Definition at line 373 of file standard.cpp.

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◆ Solver()

TxoutType Solver	(	const CScript &	scriptPubKey,
		std::vector< std::vector< unsigned char >> &	vSolutionsRet
	)

Parse a scriptPubKey and identify script type for standard scripts.

If successful, returns script type and parsed pubkeys or hashes, depending on the type. For example, for a P2SH script, vSolutionsRet will contain the script hash, for P2PKH it will contain the key hash, etc.

Parameters

[in]	scriptPubKey	Script to parse
[out]	vSolutionsRet	Vector of parsed pubkeys and hashes

Returns: The script type. TxoutType::NONSTANDARD represents a failed solve.

Definition at line 144 of file standard.cpp.

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◆ ToKeyID() [1/2]

CKeyID ToKeyID ( const PKHash & key_hash )

Definition at line 34 of file standard.cpp.

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◆ ToKeyID() [2/2]

CKeyID ToKeyID ( const WitnessV0KeyHash & key_hash )

Definition at line 39 of file standard.cpp.

Variable Documentation

◆ DEFAULT_ACCEPT_DATACARRIER

const bool DEFAULT_ACCEPT_DATACARRIER = true

static

Definition at line 18 of file standard.h.

◆ fAcceptDatacarrier

bool fAcceptDatacarrier

A data carrying output is an unspendable output containing data.

The script type is designated as TxoutType::NULL_DATA.

Definition at line 19 of file standard.cpp.

◆ MANDATORY_SCRIPT_VERIFY_FLAGS

const unsigned int MANDATORY_SCRIPT_VERIFY_FLAGS = SCRIPT_VERIFY_P2SH

static

Mandatory script verification flags that all new blocks must comply with for them to be valid.

(but old blocks may not comply with) Currently just P2SH, but in the future other flags may be added.

Failing one of these tests may trigger a DoS ban - see CheckInputScripts() for details.

Definition at line 57 of file standard.h.

◆ MAX_OP_RETURN_RELAY

const unsigned int MAX_OP_RETURN_RELAY = 83

static

Default setting for nMaxDatacarrierBytes.

80 bytes of data, +1 for OP_RETURN, +2 for the pushdata opcodes.

Definition at line 38 of file standard.h.

◆ nMaxDatacarrierBytes

unsigned nMaxDatacarrierBytes

Maximum size of TxoutType::NULL_DATA scripts that this node considers standard.

Definition at line 20 of file standard.cpp.

Classes

Typedefs

Enumerations

Functions

Variables

Typedef Documentation

◆ CTxDestination

Enumeration Type Documentation

◆ TxoutType

Function Documentation

◆ ExtractDestination()

◆ ExtractDestinations()

◆ GetScriptForDestination()

◆ GetScriptForMultisig()

◆ GetScriptForRawPubKey()

◆ GetTxnOutputType()

◆ InferTaprootTree()

◆ IsValidDestination()

◆ Solver()

◆ ToKeyID() [1/2]

◆ ToKeyID() [2/2]

Variable Documentation

◆ DEFAULT_ACCEPT_DATACARRIER

◆ fAcceptDatacarrier

◆ MANDATORY_SCRIPT_VERIFY_FLAGS

◆ MAX_OP_RETURN_RELAY

◆ nMaxDatacarrierBytes