Add an http outcalls example #1261
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rust/http_outcalls/backend/lib.rs
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| body: None, | ||
| // No need to transform the response any longer, as it is not replicated | ||
| transform: None, | ||
| // The request is not replicated. This means that a single node will attempt the outcall. This is ideal for fast moving data (such as eg crypto prices), non idempotent operations and so on. |
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I think we should mention here that one must be cautious with trusting such a response, as a malicious replica could return whatever it wanted. And maybe also that for practical purposes this usually means that one needs a way to verify the response out of band inside the canister, or to send out multiple such requests and only accept if enough responses agree.
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Similarly, I'd also mention something along those lines in the readme.md.
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Good points, I added some more comments both in the code and in the readme doc
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Is this supposed to replace the HTTP Get and HTTP Post examples? They seem quite overlapping |
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i think there are some CI workflows missing https://github.com/dfinity/examples/blob/master/NINJA_CONTRIBUTING.md#preparing-the-pr |
This showcases two ways of using the http outcalls feature in rust, and adds them to the icp ninja examples:
In the case of the replicated http outcall, we also showcase the use of transform queries and how / why they help reach consensus.