feat: download and upload snapshot offline#382
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# Motivation When I developed support for the read and upload snapshot feature in #1046, I was really hesitant about whether to parse/map the metadata response. On one hand, for consistency with the other functions in the module, we should not parse the response, since none of the other functions do so. On the other hand, we already use custom parameters for the exposed parts of the module, a pattern that should also apply when implementing the upload metadata of the snapshot. Ultimately, I decided it would be more practical for the consumer to receive a mapped object when reading data. This way, the consumer can simply download a value and pass the same back on upload, without having to implement additional conversions on their side. I validated this approach with my implementation in Juno's CLI (PR [382](junobuild/cli#382)). That said, I’m still not fully satisfied with it. Generally speaking, I hope we’ll find a solution in the future that makes both inputs and outputs consistent. # Changes - Define a response type to read metadata - Add a utility to parse candid types to custom js type - Expose new module to consumer # Notes I exposed the all `snapshot.response` module in `index.ts`, not just the interface, for consistency reasons because we do so with the params. --------- Signed-off-by: David Dal Busco <david.dalbusco@dfinity.org>
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