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Is it possible to create an offer that would only be valid for a day through Stellar DEX? If not filled until expiry time, such offer would be automatically cancelled.

Centralized exchanges often allow specifying the order lifetime. For example in Kraken: https://support.kraken.com/hc/en-us/articles/203053246-Other-Order-Options

Specifying the expiration time does not seem to be possible through the Create Offer API.

Stellar Smart Contracts provide a capability to create a time lock: https://www.stellar.org/developers/guides/walkthroughs/stellar-smart-contracts.html#2-party-multisignature-escrow-account-with-time-lock-recovery

Could the expiration time for an offer be enforced with a smart contract?
I understand that the workaround solution is to send a cancel offer request after the expiration time, but that does not seem to be the optimal (or 100% reliable) way of doing things.

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Stellar does not support expiring offers. Time locks only specify the time window when a Stellar transaction is eligible to be submitted to the network but not it's validity.

Therefore, sending a cancel offer operation after the expiration time is currently the only way of achieving what you want.

  • Please expand on your answer – Saya May 31 '18 at 23:43

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