74 lines
2.0 KiB
Markdown
74 lines
2.0 KiB
Markdown
---
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id: timestamps-addresses
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title: Timestamps, Addresses
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---
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## Timestamps
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Timestamps in LIGO, or in Michelson in general are available in smart contracts, while bakers baking the block (including the transaction in a block) are responsible for providing the given current timestamp for the contract.
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### Current time
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You can obtain the current time using the built-in syntax specific expression, please be aware that it's up to the baker to set the current timestamp value.
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<!--DOCUSAURUS_CODE_TABS-->
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<!--Pascaligo-->
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```pascaligo group=a
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const today: timestamp = now;
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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> When running code with ligo CLI, the option `--predecessor-timestamp` allows you to control what `now` returns.
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### Timestamp arithmetic
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In LIGO, timestamps can be added with `int`(s), this enables you to set e.g. time constraints for your smart contracts like this:
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#### In 24 hours
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<!--DOCUSAURUS_CODE_TABS-->
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<!--Pascaligo-->
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```pascaligo group=b
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const today: timestamp = now;
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const one_day: int = 86400;
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const in_24_hrs: timestamp = today + one_day;
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const some_date: timestamp = ("2000-01-01T10:10:10Z" : timestamp);
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const one_day_later: timestamp = some_date + one_day;
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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#### 24 hours ago
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<!--DOCUSAURUS_CODE_TABS-->
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<!--Pascaligo-->
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```pascaligo group=c
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const today: timestamp = now;
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const one_day: int = 86400;
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const in_24_hrs: timestamp = today - one_day;
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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### Comparing timestamps
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You can also compare timestamps using the same comparison operators as for numbers:
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<!--DOCUSAURUS_CODE_TABS-->
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<!--Pascaligo-->
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```pascaligo group=c
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const not_tommorow: bool = (now = in_24_hrs)
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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## Addresses
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`address` is a LIGO datatype used for Tezos addresses (tz1, tz2, tz3, KT1, ...).
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Here's how you can define an address:
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<!--DOCUSAURUS_CODE_TABS-->
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<!--Pascaligo-->
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```pascaligo group=d
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const my_account: address = ("tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx": address);
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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