How to set a timer with solidity?

Question

I'm writing a Defi project. What I want to do is to set an automatic payment. For example, when a lender asks to lend 10 eth, the money would be automaticly sent to him after a month. I have searched a lot but found nothing. Are there any possible remedy? THANKS!

Does this answer your question? [run solidity code after every x amount of time](https://stackoverflow.com/questions/68024206/run-solidity-code-after-every-x-amount-of-time) — Petr Hejda, Feb 15 '22 at 13:17

score 2 · Answer 1 · answered Feb 15 '22 at 14:00

2

You would have to use chainlink keepers for that.

You can put a require statement that will ensure that the eth won't be sent before the 30 days but there is no way to call the function from solidity after 30 days.

answered Feb 15 '22 at 14:00

Kuly14

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score 2 · Accepted Answer · answered Feb 15 '22 at 18:45

I'm writing a Defi project. What I want to do is to set an automatic payment. For example, when a lender asks to lend 10 eth, the money would be automaticly sent to him after a month. I have searched a lot but found nothing.

You don't. In Ethereum, transactions are always initiated by the user, or Externally Owned Accounts (EOAs).

You program your smart contract in a way that after certain block.timestamp has passed the user can call claim() function that sends him any payment.

How to set a timer with solidity?

2 Answers2