* [bitcoin-dev] BIP 68 Questions
@ 2015-07-02 2:38 Rusty Russell
2015-07-03 1:19 ` Rusty Russell
0 siblings, 1 reply; 2+ messages in thread
From: Rusty Russell @ 2015-07-02 2:38 UTC (permalink / raw)
To: Mark Friedenbach; +Cc: bitcoin-dev
Hi Mark,
It looks like the code in BIP 68 compares the input's nSequence
against the transaction's nLockTime:
if ((int64_t)tx.nLockTime < LOCKTIME_THRESHOLD)
nMinHeight = std::max(nMinHeight, (int)tx.nLockTime);
else
nMinTime = std::max(nMinTime, (int64_t)tx.nLockTime);
if (nMinHeight >= nBlockHeight)
return nMinHeight;
if (nMinTime >= nBlockTime)
return nMinTime;
So if transaction B spends the output of transaction A:
1. If A is in the blockchain already, you don't need a relative
locktime since you know A's time.
2. If it isn't, you can't create B since you don't know what
value to set nLockTime to.
How was this supposed to work?
Thanks,
Rusty.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [bitcoin-dev] BIP 68 Questions
2015-07-02 2:38 [bitcoin-dev] BIP 68 Questions Rusty Russell
@ 2015-07-03 1:19 ` Rusty Russell
0 siblings, 0 replies; 2+ messages in thread
From: Rusty Russell @ 2015-07-03 1:19 UTC (permalink / raw)
To: Mark Friedenbach; +Cc: bitcoin-dev
Rusty Russell <rusty@rustcorp•com.au> writes:
> Hi Mark,
>
> It looks like the code in BIP 68 compares the input's nSequence
> against the transaction's nLockTime:
No, forget this. I misread the code. Mark ELI5'd to me offlist, thanks!
FWIW, the code works :)
Cheers,
Rusty.
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