how to automatically schedule the execution of a smart contract?

samthiriot / ether-whistleblowers

tests on ethereum blockchain for whistleblowers

0 stars 1 forks source link

how to automatically schedule the execution of a smart contract? #3

Open samthiriot opened 6 years ago

Olivier-Boudeville commented 6 years ago

stackexchange question:

https://ethereum.stackexchange.com/questions/42/how-can-a-contract-run-itself-at-a-later-time

Alarm smart service:

intro: http://blog.ethereum-alarm-clock.com/blog/2016/1/16/the-alarm-service-is-now-available-on-the-testnet
doc: https://eac-docs.surge.sh/
source: https://github.com/chronologic/ethereum-alarm-clock
gitter (chat): https://gitter.im/pipermerriam/ethereum-alarm-clock

samthiriot commented 6 years ago

ticket on ethereum ALARM request (taget WONTFIX) https://github.com/ethereum/go-ethereum/issues/117

samthiriot commented 6 years ago

after discussion with a blockchain guru, the standard solution (used for instance when transactions for contracts can only be executed after some time) is: the smart contract has:

a function isThereSomethingToSend() which is a call (free!), that a crontab, or any user, or a website can call from time to time to know whether its worst paying gas to actually broadcast
a function sendPending() which is a transaction, which if there is something to send, will send it (at the expense of the caller) or else will refund the caller

he sounded very affirmative