Module sequence 

Bitcoin transaction input sequence number.

The sequence field is used for:

• Indicating whether absolute lock-time (specified in lock_time field of Transaction) is enabled.
• Indicating and encoding BIP-68 relative lock-times.
• Indicating whether a transaction opts-in to BIP-125 replace-by-fee.

Note that transactions spending an output with OP_CHECKLOCKTIMEVERIFYMUST NOT use Sequence::MAX for the corresponding input. BIP-65

Structs

Sequence

Bitcoin transaction input sequence number.