Possible to calculate cid using Writer interface instead of reading full file into memory?

[shoce]

As Prefix.Sum() accepts []byte i need to read the full file into memory and then feed to .Sum(). How can i make use of streaming with io.Copy() instead and reduce memory requirements?

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[shoce]

After some investigation, I think it is more a question for github.com/multiformats/go-multihash codebase.

[warpfork]

We did recently add features to go-multihash to make it usable in a streaming fashion :)

Unfortunately, you're right, go-cid still doesn't have exposed APIs for streaming usage today. More work is needed on this.