April 2017
Intermediate to advanced
266 pages
7h 4m
English
Content preview from Building Blockchain Projects
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Timestamp
The formula to calculate the target of a block requires the current timestamp, and also every block has the current timestamp attached to its header. Nothing can stop a miner from using some other timestamp instead of the current timestamp while mining a new block, but they don't usually because timestamp validation would fail and other nodes won't accept the block, and it would be a waste of resources of the miner. When a miner broadcasts a newly mined block, its timestamp is validated by checking whether the timestamp is greater than the timestamp of the previous block. If a miner uses a timestamp greater than the current timestamp, the difficulty will be low as difficulty is inversely proportional to the current timestamp; therefore, ...
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