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How can a contract run itself at a later time?
In my blockchain application, I would like to have an event triggered at a later time, hours or perhaps even days after the application has most recently received a transaction from a user. How can I create an "event" that will trigger after a certain amount of time has passed?
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2 Answers
You could use the Ethereum Alarm Clock as previously mentioned, but you could also change your programming style to a "must call to execute" paradigm.
For instance, if you want to lock up money for a month until it gets returned, instead of actually having the money be sent after a month, you could have the user call a function that then returns the money.
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There is no formal way to schedule events via the protocol itself.
However somebody already wrote an Ethereum Alarm Clock-contract that supports scheduling events at a later moment in time. It's decentralized as well as far as I could tell, anybody can fire scheduled events and get paid for doing so.
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How can a contract run itself at a later time?
In my blockchain application, I would like to have an event triggered at a later time, hours or perhaps even days after the application has most recently received a transaction from a user. How can I create an "event" that will trigger after a certain amount of time has passed?
21.9k16 gold badges76 silver badges91 bronze badges
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You could use the Ethereum Alarm Clock as previously mentioned, but you could also change your programming style to a "must call to execute" paradigm.
For instance, if you want to lock up money for a month until it gets returned, instead of actually having the money be sent after a month, you could have the user call a function that then returns the money.
6,08825 silver badges32 bronze badges
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