I've read the Oracle implementation recently via https://plutus-pioneer-program.readthedocs.io/en/latest/pioneer/week6.html.

As I understand, Oracle has 2 primary operations the following

1. Use: an Oracle UTxO will be used to execute a transaction
2. Update: As part of the EUTxO model/blockchain, every data in the chain are immutable, meaning Oracle data can't be updated itself. It requires update operations to update the data. For instance ADA/USD ratio rate.

Due to the update operation, there are 2 questions that come to my mind. Could anyone please help to explain this to me, please?

1. How frequently will Oracle data be updated? I think there would have different answers for different scenarios, but I don't know any specific cases in practice yet. It would be good if you could help to estimate costs for them based on scenarios.
2. I suppose we have the off-chain part to send transactions for updating Oracle data. So what will happen if the off-chain part is broken? For instance, ADA/USD ratio rate can't be updated and smart contracts keep using the old rate.

If you have any idea about the way Indigo https://indigoprotocol.io/ (or any other launched products on the Cardano ecosystem) implement their Oracle, It would be very appreciated if you could add them here.

Thank you very much!

I've read the Oracle implementation recently via https://plutus-pioneer-program.readthedocs.io/en/latest/pioneer/week6.html.

As I understand, Oracle has 2 primary operations the following

1. Use: an Oracle UTxO will be used to execute a transaction
2. Update: As part of the EUTxO model/blockchain, every data in the chain are immutable, meaning Oracle data can't be updated itself. It requires update operations to update the data. For instance ADA/USD ratio rate.

Due to the update operation, there are 2 questions that come to my mind. Could anyone please help to explain this to me, please?

1. How frequently will Oracle data be updated? I think there would have different answers for different scenarios, but I don't know any specific cases in practice yet. It would be good if you could help to estimate costs for them based on scenarios.
2. I suppose we have the off-chain part to send transactions for updating Oracle data. So what will happen if the off-chain part is broken? For instance, ADA/USD ratio rate can't be updated and smart contracts keep using the old rate.

If you have any idea about the way Indigo https://indigoprotocol.io/ (or any other launched products on the Cardano ecosystem) implement their Oracle, It would be very appreciated if you could add them here.

Thank you very much!