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According to this, an IPFS hash can be represented with 32 bytes.

  1. Would these hashes need to be stored in RAM?
  2. If so, is it limited to 1 file stored per hash?

  3. Would it be ~$0.20/hash to store in RAM if we assume:

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Slide from Dan's presentation on "Scaling Blockchain Computation and Storage"

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    For 1., that depends on your use case. What is this. You could also browse the history to find a transaction with your hash. See eosproof.io for example.
    – friedger
    Commented Jul 6, 2018 at 11:38
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    For 2., you could also store the hash of a directory
    – friedger
    Commented Jul 6, 2018 at 11:40

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  1. Yes, if your contract needs to access hashes. In other word, if you store hashes in multi-index table rows, it needs RAM.

  2. From the view of IPFS, a hash represents a file. Whatever the content it has.

  3. Your math is correct. But the RAM price you gave is 0.0228/32*1000 = 0.7125 EOS/KB, pretty much on the recent spike. The RAM has gone crazy lately and thus gives you the answer $0.20/hash. Now the market calms down a little. By the time I'm answering this question, the price is 0.47 EOS/KB. https://eos.feexplorer.io/

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