Understanding Bitcoin Transaction Lock
As a Bitcoin user, understanding the nuances of transaction lock time is crucial to understanding how transactions are checked and processed on a blockchain. In this article, we will deepen in the specifics of how a transaction was pleased with its relative time for locking.
Breaks of transactions
Let’s analyze the transaction provided: 3C1C9FB9D6B215EFDEEDB5CAF6A951A9E6C6C1E3DE6E5674F6463E94667497. This transaction includes three inputs, which we will call “1” and “2”. The output of the first entrance is marked as “3”, while the second entrance is called “32”.
op_pushbytes
The first few lines of the transaction are op_pushbytes_3 FA0140, followed by ‘op_csv. These commands indicate that we are about to press a bye (value 0x4001fa) and then calculate the control amount (p_csv) for it.
op_drop
The transaction then executes theop_dropcommand, which indicates that the calculated early control amount is being lowered. This happens that the following calculations can be carried out without having to recalculate the control amount.
Relative Lock Time satisfaction
Now, let's focus on satisfying the relative lock time for this transaction. The relative lock refers to the time interval between two consecutive transactions that share a common input. In other words, if the transaction A has a input with a value X and the transaction B shares the same input, then the relative time to lock transaction B will be the difference between their input values.
For our transaction:
- Login 1 (with a value of 0x4001fa) is shared by both transactions.
- Transaction A output is output 3 until the transaction output is referred to as "32".
In order to satisfy the relative lock time for this transaction, we must ensure that the difference between the input values does not exceed a particular threshold. In the context of Bitcoin, the default value for validation of the input is set tonsectnce = 0x4001fa, which means that the transaction will only be valid if the input value exactly matches the input used in the previous transaction (in this case, transaction a ).
However, since both entrances have the same value (0x4001fa) and we have already released the control amount, the transaction is unlikely to be validated. In practice, Bitcoin uses a healthier validation mechanism, including multiple inspections, including theop_checkmint ‘command.
Conclusion
In summary, in order to satisfy the relative lock time for this specific transaction, the input values must match exactly between consecutive transactions that share a common input. As both entrances have the same value (0x4001fa), the difference in input values is unlikely to be significant enough to cause validation checks. Nevertheless, this gives an idea of how Bitcoin’s locking mechanisms work and emphasize the importance of careful examination of transaction entrances when checking their relative lock time.