diff options
Diffstat (limited to 'src/primitives/transaction.h')
| -rw-r--r-- | src/primitives/transaction.h | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h index 67ea4a3747..1fcbc45c72 100644 --- a/src/primitives/transaction.h +++ b/src/primitives/transaction.h @@ -70,25 +70,45 @@ public: uint32_t nSequence; CScriptWitness scriptWitness; //!< Only serialized through CTransaction - /* Setting nSequence to this value for every input in a transaction - * disables nLockTime. */ + /** + * 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). + */ static const uint32_t SEQUENCE_FINAL = 0xffffffff; + /** + * 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). + */ + static const uint32_t MAX_SEQUENCE_NONFINAL{SEQUENCE_FINAL - 1}; - /* Below flags apply in the context of BIP 68*/ - /* If this flag set, CTxIn::nSequence is NOT interpreted as a - * relative lock-time. */ + // Below flags apply in the context of BIP 68. BIP 68 requires the tx + // version to be set to 2, or higher. + /** + * 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). + */ static const uint32_t SEQUENCE_LOCKTIME_DISABLE_FLAG = (1U << 31); - /* If CTxIn::nSequence encodes a relative lock-time and this flag + /** + * 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. */ static const uint32_t SEQUENCE_LOCKTIME_TYPE_FLAG = (1 << 22); - /* If CTxIn::nSequence encodes a relative lock-time, this mask is + /** + * If CTxIn::nSequence encodes a relative lock-time, this mask is * applied to extract that lock-time from the sequence field. */ static const uint32_t SEQUENCE_LOCKTIME_MASK = 0x0000ffff; - /* In order to use the same number of bits to encode roughly the + /** + * 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. |