When requesting getwork from bitcoind or a pool, the miner is expected to be incrementing the nonce value of the block, but can it also increment the timestamp value, or would such tempering cause a submitted work to be rejected by bitcoind or a given pool?
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1It depends on the pool's policy. This is called NTime rolling.– David SchwartzFeb 10, 2012 at 7:18
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1@DavidSchwartz Hmm, I was thinking that's what it should be, although some descriptions for NTime rolling implied that it allows a miner not to discard an unfinished getwork after one second, not that it allows the miner to increment timestamp.– ThePiachuFeb 10, 2012 at 8:26
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1 Answer
Yes, the miner can increment the time stamp by a limited amount, but only if the pool advertises X-Roll-NTime as a feature. DiabloMiner and CGMiner both support this.
See the official spec for more information.
