diff options
Diffstat (limited to 'src/policy/policy.h')
| -rw-r--r-- | src/policy/policy.h | 64 |
1 files changed, 40 insertions, 24 deletions
diff --git a/src/policy/policy.h b/src/policy/policy.h index 89f6e72618..cd98a601a3 100644 --- a/src/policy/policy.h +++ b/src/policy/policy.h @@ -6,58 +6,75 @@ #ifndef BITCOIN_POLICY_POLICY_H #define BITCOIN_POLICY_POLICY_H +#include <consensus/amount.h> #include <consensus/consensus.h> -#include <policy/feerate.h> +#include <primitives/transaction.h> #include <script/interpreter.h> #include <script/standard.h> +#include <cstdint> #include <string> class CCoinsViewCache; -class CTxOut; +class CFeeRate; +class CScript; /** Default for -blockmaxweight, which controls the range of block weights the mining code will create **/ -static const unsigned int DEFAULT_BLOCK_MAX_WEIGHT = MAX_BLOCK_WEIGHT - 4000; +static constexpr unsigned int DEFAULT_BLOCK_MAX_WEIGHT{MAX_BLOCK_WEIGHT - 4000}; /** Default for -blockmintxfee, which sets the minimum feerate for a transaction in blocks created by mining code **/ -static const unsigned int DEFAULT_BLOCK_MIN_TX_FEE = 1000; +static constexpr unsigned int DEFAULT_BLOCK_MIN_TX_FEE{1000}; /** The maximum weight for transactions we're willing to relay/mine */ -static const unsigned int MAX_STANDARD_TX_WEIGHT = 400000; +static constexpr unsigned int MAX_STANDARD_TX_WEIGHT{400000}; /** The minimum non-witness size for transactions we're willing to relay/mine (1 segwit input + 1 P2WPKH output = 82 bytes) */ -static const unsigned int MIN_STANDARD_TX_NONWITNESS_SIZE = 82; +static constexpr unsigned int MIN_STANDARD_TX_NONWITNESS_SIZE{82}; /** Maximum number of signature check operations in an IsStandard() P2SH script */ -static const unsigned int MAX_P2SH_SIGOPS = 15; +static constexpr unsigned int MAX_P2SH_SIGOPS{15}; /** The maximum number of sigops we're willing to relay/mine in a single tx */ -static const unsigned int MAX_STANDARD_TX_SIGOPS_COST = MAX_BLOCK_SIGOPS_COST/5; -/** Default for -maxmempool, maximum megabytes of mempool memory usage */ -static const unsigned int DEFAULT_MAX_MEMPOOL_SIZE = 300; +static constexpr unsigned int MAX_STANDARD_TX_SIGOPS_COST{MAX_BLOCK_SIGOPS_COST/5}; /** Default for -incrementalrelayfee, which sets the minimum feerate increase for mempool limiting or BIP 125 replacement **/ -static const unsigned int DEFAULT_INCREMENTAL_RELAY_FEE = 1000; +static constexpr unsigned int DEFAULT_INCREMENTAL_RELAY_FEE{1000}; /** Default for -bytespersigop */ -static const unsigned int DEFAULT_BYTES_PER_SIGOP = 20; +static constexpr unsigned int DEFAULT_BYTES_PER_SIGOP{20}; /** Default for -permitbaremultisig */ -static const bool DEFAULT_PERMIT_BAREMULTISIG = true; +static constexpr bool DEFAULT_PERMIT_BAREMULTISIG{true}; /** The maximum number of witness stack items in a standard P2WSH script */ -static const unsigned int MAX_STANDARD_P2WSH_STACK_ITEMS = 100; +static constexpr unsigned int MAX_STANDARD_P2WSH_STACK_ITEMS{100}; /** The maximum size in bytes of each witness stack item in a standard P2WSH script */ -static const unsigned int MAX_STANDARD_P2WSH_STACK_ITEM_SIZE = 80; +static constexpr unsigned int MAX_STANDARD_P2WSH_STACK_ITEM_SIZE{80}; /** The maximum size in bytes of each witness stack item in a standard BIP 342 script (Taproot, leaf version 0xc0) */ -static const unsigned int MAX_STANDARD_TAPSCRIPT_STACK_ITEM_SIZE = 80; +static constexpr unsigned int MAX_STANDARD_TAPSCRIPT_STACK_ITEM_SIZE{80}; /** The maximum size in bytes of a standard witnessScript */ -static const unsigned int MAX_STANDARD_P2WSH_SCRIPT_SIZE = 3600; +static constexpr unsigned int MAX_STANDARD_P2WSH_SCRIPT_SIZE{3600}; /** The maximum size of a standard ScriptSig */ -static const unsigned int MAX_STANDARD_SCRIPTSIG_SIZE = 1650; +static constexpr unsigned int MAX_STANDARD_SCRIPTSIG_SIZE{1650}; /** Min feerate for defining dust. Historically this has been based on the * minRelayTxFee, however changing the dust limit changes which transactions are * standard and should be done with care and ideally rarely. It makes sense to * only increase the dust limit after prior releases were already not creating * outputs below the new threshold */ -static const unsigned int DUST_RELAY_TX_FEE = 3000; +static constexpr unsigned int DUST_RELAY_TX_FEE{3000}; +/** Default for -minrelaytxfee, minimum relay fee for transactions */ +static constexpr unsigned int DEFAULT_MIN_RELAY_TX_FEE{1000}; +/** Default for -limitancestorcount, max number of in-mempool ancestors */ +static constexpr unsigned int DEFAULT_ANCESTOR_LIMIT{25}; +/** Default for -limitancestorsize, maximum kilobytes of tx + all in-mempool ancestors */ +static constexpr unsigned int DEFAULT_ANCESTOR_SIZE_LIMIT_KVB{101}; +/** Default for -limitdescendantcount, max number of in-mempool descendants */ +static constexpr unsigned int DEFAULT_DESCENDANT_LIMIT{25}; +/** Default for -limitdescendantsize, maximum kilobytes of in-mempool descendants */ +static constexpr unsigned int DEFAULT_DESCENDANT_SIZE_LIMIT_KVB{101}; +/** + * An extra transaction can be added to a package, as long as it only has one + * ancestor and is no larger than this. Not really any reason to make this + * configurable as it doesn't materially change DoS parameters. + */ +static constexpr unsigned int EXTRA_DESCENDANT_TX_SIZE_LIMIT{10000}; /** * Standard script verification flags that standard transactions will comply * with. However scripts violating these flags may still be present in valid * blocks and we must accept those blocks. */ -static constexpr unsigned int STANDARD_SCRIPT_VERIFY_FLAGS = MANDATORY_SCRIPT_VERIFY_FLAGS | +static constexpr unsigned int STANDARD_SCRIPT_VERIFY_FLAGS{MANDATORY_SCRIPT_VERIFY_FLAGS | SCRIPT_VERIFY_DERSIG | SCRIPT_VERIFY_STRICTENC | SCRIPT_VERIFY_MINIMALDATA | @@ -76,14 +93,13 @@ static constexpr unsigned int STANDARD_SCRIPT_VERIFY_FLAGS = MANDATORY_SCRIPT_VE SCRIPT_VERIFY_TAPROOT | SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_TAPROOT_VERSION | SCRIPT_VERIFY_DISCOURAGE_OP_SUCCESS | - SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_PUBKEYTYPE; + SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_PUBKEYTYPE}; /** For convenience, standard but not mandatory verify flags. */ -static constexpr unsigned int STANDARD_NOT_MANDATORY_VERIFY_FLAGS = STANDARD_SCRIPT_VERIFY_FLAGS & ~MANDATORY_SCRIPT_VERIFY_FLAGS; +static constexpr unsigned int STANDARD_NOT_MANDATORY_VERIFY_FLAGS{STANDARD_SCRIPT_VERIFY_FLAGS & ~MANDATORY_SCRIPT_VERIFY_FLAGS}; /** Used as the flags parameter to sequence and nLocktime checks in non-consensus code. */ -static constexpr unsigned int STANDARD_LOCKTIME_VERIFY_FLAGS = LOCKTIME_VERIFY_SEQUENCE | - LOCKTIME_MEDIAN_TIME_PAST; +static constexpr unsigned int STANDARD_LOCKTIME_VERIFY_FLAGS{LOCKTIME_VERIFY_SEQUENCE}; CAmount GetDustThreshold(const CTxOut& txout, const CFeeRate& dustRelayFee); |