Topic: howto nlocktime (Read 6922 times)

    // Treat non-final transactions as non-standard to prevent a specific type
    // of double-spend attack, as well as DoS attacks. (if the transaction
    // can't be mined, the attacker isn't expending resources broadcasting it)
    // Basically we don't want to propagate transactions that can't be included in
    // the next block.

bool IsFinalTx(const CTransaction &tx, int nBlockHeight, int64_t nBlockTime)
{
    if ((int64_t)tx.nLockTime < ((int64_t)tx.nLockTime < LOCKTIME_THRESHOLD ? (int64_t)nBlockHeight : nBlockTime))
        return true;
    BOOST_FOREACH(const CTxIn& txin, tx.vin)
        if (!txin.IsFinal())
            return false;
    return true;
}

class CTxIn
{
public:
    bool IsFinal() const
    {
        return (nSequence == std::numeric_limits::max());
    }
}

01000000 =>          1: block 1
0a000000 =>         10: block 10
ff000000 =>        255: block 255
00010000 =>        256: block 256
00020000 =>        512: block 512
00100000 =>       4096: block 4096
00000001 =>   16777216: block 16777216
ff64cd1d =>  499999999: block 499999999
0065cd1d =>  500000000: Nov 5 1985 00:53:20 UTC, note it isn't a block number anymore!
805ac352 => 1388534400: Jan 1 2014 00:00:00 UTC

01000000010fff030dfce93c3e4457af8ad0cd47c184a9671db28cb3cb1188b4366ce5906800000000473045022100a4b143ff81dd6ab899aef5234a02054354de8a309eff811d654cd21d6e0b536102207100585568dafba3663720a710aa0cafed27e2379292c246cf0b3cb5b21b3579ffffffff01905f0100000000001976a91428d4cb88f005376046ab1fca64ae9c8a4bcfc73a88ac00000000

{
   "lock_time":0,
   "inputs":[ blah blah ],
   "vout_sz":1,
   "hash":"72d9c8951e543ce7a370aec3c3007e8f4e6e3d244a770631ae55a23b00457be4",
   "vin_sz":1,
   "out":[ blah blah ],
   "size":156,
   "version":1
}

01000000010fff030dfce93c3e4457af8ad0cd47c184a9671db28cb3cb1188b4366ce5906800000000473045022100a4b143ff81dd6ab899aef5234a02054354de8a309eff811d654cd21d6e0b536102207100585568dafba3663720a710aa0cafed27e2379292c246cf0b3cb5b21b3579ffffffff01905f0100000000001976a91428d4cb88f005376046ab1fca64ae9c8a4bcfc73a88ac1b787352

{
   "lock_time":1383299099,
   "inputs":[ blah blah ],
   "vout_sz":1,
   "hash":"ace99d8d6301982e7978997a7c47f8807314eaaca5c3f7b03576b2d036faed2c",
   "vin_sz":1,
   "out":[ blah blah ],
   "size":156,
   "version":1
}