Bitcoin ABC  0.26.3
P2P Digital Currency
policy.h
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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_POLICY_POLICY_H
7 #define BITCOIN_POLICY_POLICY_H
8 
9 #include <consensus/consensus.h>
10 #include <feerate.h>
11 #include <script/standard.h>
12 
13 #include <string>
14 
15 class CCoinsViewCache;
16 class CTransaction;
17 class CTxIn;
18 class CTxOut;
19 
24 static const uint64_t DEFAULT_MAX_GENERATED_BLOCK_SIZE = 2 * ONE_MEGABYTE;
33 static const unsigned int MAX_STANDARD_TX_SIZE = 100000;
34 
43 static const unsigned int MAX_TX_IN_SCRIPT_SIG_SIZE = 1650;
44 
48 static const unsigned int DEFAULT_MAX_MEMPOOL_SIZE = 300;
57 static const unsigned int DEFAULT_BYTES_PER_SIGOP = 50;
59 static const bool DEFAULT_PERMIT_BAREMULTISIG = true;
67 static const Amount DUST_RELAY_TX_FEE(1000 * SATOSHI);
68 
74 static constexpr uint32_t MANDATORY_SCRIPT_VERIFY_FLAGS =
79 
91 static constexpr uint32_t STANDARD_SCRIPT_VERIFY_FLAGS =
97 
101 static constexpr uint32_t STANDARD_NOT_MANDATORY_VERIFY_FLAGS =
103 
108 static constexpr uint32_t STANDARD_LOCKTIME_VERIFY_FLAGS =
110 
111 Amount GetDustThreshold(const CTxOut &txout, const CFeeRate &dustRelayFee);
112 
113 bool IsDust(const CTxOut &txout, const CFeeRate &dustRelayFee);
114 
115 bool IsStandard(const CScript &scriptPubKey, TxoutType &whichType);
116 
122 bool IsStandardTx(const CTransaction &tx, bool permit_bare_multisig,
123  const CFeeRate &dust_relay_fee, std::string &reason);
124 
131 bool AreInputsStandard(const CTransaction &tx, const CCoinsViewCache &mapInputs,
132  uint32_t flags);
133 
138 int64_t GetVirtualTransactionSize(int64_t nSize, int64_t nSigOpCount,
139  unsigned int bytes_per_sigop);
140 int64_t GetVirtualTransactionSize(const CTransaction &tx, int64_t nSigOpCount,
141  unsigned int bytes_per_sigop);
142 int64_t GetVirtualTransactionInputSize(const CTxIn &txin, int64_t nSigOpCount,
143  unsigned int bytes_per_sigop);
144 
145 static inline int64_t GetVirtualTransactionSize(const CTransaction &tx) {
146  return GetVirtualTransactionSize(tx, 0, 0);
147 }
148 
149 static inline int64_t GetVirtualTransactionInputSize(const CTxIn &tx) {
150  return GetVirtualTransactionInputSize(tx, 0, 0);
151 }
152 
153 #endif // BITCOIN_POLICY_POLICY_H
static constexpr Amount SATOSHI
Definition: amount.h:153
int flags
Definition: bitcoin-tx.cpp:534
CCoinsView that adds a memory cache for transactions to another CCoinsView.
Definition: coins.h:203
Fee rate in satoshis per kilobyte: Amount / kB.
Definition: feerate.h:21
Serialized script, used inside transaction inputs and outputs.
Definition: script.h:431
The basic transaction that is broadcasted on the network and contained in blocks.
Definition: transaction.h:194
An input of a transaction.
Definition: transaction.h:61
An output of a transaction.
Definition: transaction.h:130
CScript scriptPubKey
Definition: transaction.h:133
static constexpr unsigned int LOCKTIME_VERIFY_SEQUENCE
Flags for nSequence and nLockTime locks.
Definition: consensus.h:38
static constexpr unsigned int LOCKTIME_MEDIAN_TIME_PAST
Use GetMedianTimePast() instead of nTime for end point timestamp.
Definition: consensus.h:40
static const uint64_t ONE_MEGABYTE
1MB
Definition: consensus.h:12
unsigned int nSigOpCount
CFeeRate dustRelayFee
Definition: settings.cpp:11
static constexpr uint32_t MANDATORY_SCRIPT_VERIFY_FLAGS
When transactions fail script evaluations under standard flags, this flagset influences the decision ...
Definition: policy.h:74
static const uint64_t DEFAULT_MAX_GENERATED_BLOCK_SIZE
Default for -blockmaxsize, which controls the maximum size of block the mining code will create.
Definition: policy.h:24
static const Amount DUST_RELAY_TX_FEE(1000 *SATOSHI)
Min feerate for defining dust.
static const Amount DEFAULT_BLOCK_MIN_TX_FEE_PER_KB(1000 *SATOSHI)
Default for -blockmintxfee, which sets the minimum feerate for a transaction in blocks created by min...
static const CFeeRate MEMPOOL_FULL_FEE_INCREMENT(1000 *SATOSHI)
Default for -incrementalrelayfee, which sets the minimum feerate increase for mempool limiting or BIP...
static const unsigned int MAX_TX_IN_SCRIPT_SIG_SIZE
Biggest 'standard' txin is a 15-of-15 P2SH multisig with compressed keys (remember the 520 byte limit...
Definition: policy.h:43
bool AreInputsStandard(const CTransaction &tx, const CCoinsViewCache &mapInputs, uint32_t flags)
Check for standard transaction types.
Definition: policy.cpp:142
bool IsStandardTx(const CTransaction &tx, bool permit_bare_multisig, const CFeeRate &dust_relay_fee, std::string &reason)
Check for standard transaction types.
Definition: policy.cpp:69
static constexpr uint32_t STANDARD_SCRIPT_VERIFY_FLAGS
Standard script verification flags that standard transactions will comply with.
Definition: policy.h:91
static const unsigned int DEFAULT_MAX_MEMPOOL_SIZE
Default for -maxmempool, maximum megabytes of mempool memory usage.
Definition: policy.h:48
bool IsDust(const CTxOut &txout, const CFeeRate &dustRelayFee)
Definition: policy.cpp:34
bool IsStandard(const CScript &scriptPubKey, TxoutType &whichType)
Definition: policy.cpp:38
Amount GetDustThreshold(const CTxOut &txout, const CFeeRate &dustRelayFee)
Definition: policy.cpp:14
static const bool DEFAULT_PERMIT_BAREMULTISIG
Default for -permitbaremultisig.
Definition: policy.h:59
static constexpr uint32_t STANDARD_LOCKTIME_VERIFY_FLAGS
Used as the flags parameter to sequence and nLocktime checks in non-consensus code.
Definition: policy.h:108
static constexpr uint32_t STANDARD_NOT_MANDATORY_VERIFY_FLAGS
For convenience, standard but not mandatory verify flags.
Definition: policy.h:101
static const unsigned int DEFAULT_BYTES_PER_SIGOP
Default for -bytespersigop .
Definition: policy.h:57
int64_t GetVirtualTransactionSize(int64_t nSize, int64_t nSigOpCount, unsigned int bytes_per_sigop)
Compute the virtual transaction size (size, or more if sigops are too dense).
Definition: policy.cpp:162
static const unsigned int MAX_STANDARD_TX_SIZE
The maximum size for transactions we're willing to relay/mine.
Definition: policy.h:33
int64_t GetVirtualTransactionInputSize(const CTxIn &txin, int64_t nSigOpCount, unsigned int bytes_per_sigop)
Definition: policy.cpp:173
@ SCRIPT_VERIFY_P2SH
Definition: script_flags.h:16
@ SCRIPT_VERIFY_SIGPUSHONLY
Definition: script_flags.h:35
@ SCRIPT_VERIFY_LOW_S
Definition: script_flags.h:31
@ SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY
Definition: script_flags.h:68
@ SCRIPT_ENABLE_SCHNORR_MULTISIG
Definition: script_flags.h:97
@ SCRIPT_VERIFY_STRICTENC
Definition: script_flags.h:22
@ SCRIPT_VERIFY_NULLFAIL
Definition: script_flags.h:81
@ SCRIPT_VERIFY_DERSIG
Definition: script_flags.h:26
@ SCRIPT_ENFORCE_SIGCHECKS
Definition: script_flags.h:106
@ SCRIPT_VERIFY_CLEANSTACK
Definition: script_flags.h:63
@ SCRIPT_VERIFY_MINIMALDATA
Definition: script_flags.h:43
@ SCRIPT_DISALLOW_SEGWIT_RECOVERY
Definition: script_flags.h:93
@ SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS
Definition: script_flags.h:53
@ SCRIPT_VERIFY_CHECKSEQUENCEVERIFY
Definition: script_flags.h:73
@ SCRIPT_ENABLE_SIGHASH_FORKID
Definition: script_flags.h:85
@ SCRIPT_VERIFY_INPUT_SIGCHECKS
Definition: script_flags.h:103
TxoutType
Definition: standard.h:46
Definition: amount.h:19