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Being new to solidity, I find the docs on the Internet very confusing. I simply want to add 7 years to a 

uint timeInSevenYearsFromNow = (block.timestamp).add(????);

What is the value of ???? and how do I calculate it ? Is it 220898482 ?

Yes, this is a noob question. I do not care how precise or exact it will be when executed, whether it is off by a nano-second or several minutes.

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  • Do you care about leap seconds/years? – Tjaden Hess Jul 24 '19 at 3:07
  • @TjadenHess not at all, I just want to express it all as digits, without using "days" or * operators... only a simple addition of numbers. Thanks ! Edit: thanks for the answer, but I am just curious about 220898482... – Damir Olejar Jul 24 '19 at 3:17
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    Why do you want to avoid days and *? It's more readable and adds zero cost since the constants get expanded out at compile time – Tjaden Hess Jul 24 '19 at 4:32
  • I want to add a prime number, just for fun ;) – Damir Olejar Jul 25 '19 at 15:07
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If you are OK with being overly simplistic and ignoring leap seconds and leap years, you can simply do

uint timeInSevenYearsFromNow = now + 7 * 365 days;

In older versions of solidity you could use years as a unit, but this was depreciated due to the complexity of accurately tracking time over long periods.

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  • so is the 7*365 days actually 220898482 (or some other very close number) ? – Damir Olejar Jul 24 '19 at 3:16
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    Yes, the unit is just syntactic sugar for (365 * number of seconds in a day) – Tjaden Hess Jul 24 '19 at 4:31

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