Support SIA

[makoto]

No description provided.

[makoto]

When I tried to fix at https://github.com/ensdomains/content-hash/tree/sia , the test failed as follows.

  26 passing (22ms)
  3 failing

  1) content-hash
       skynet
         should encode:
     Error: Codec `skynet-skylink-v1` not found
      at Object.exports.getCodeVarint (node_modules/cids/node_modules/multicodec/src/index.js:108:11)
      at ClassIsWrapper.get buffer [as buffer] (node_modules/cids/src/index.js:160:22)
      at Object.skynet [as encode] (src/profiles.js:48:55)
      at Object.encode (src/index.js:81:32)
      at Context.it (test/test.js:128:31)

  2) content-hash
       skynet
         should getCodec:
     RangeError: Could not decode varint
      at Object.read [as decode] (node_modules/varint/decode.js:17:13)
      at Object.exports.getCodec (node_modules/multicodec/src/index.js:61:23)
      at Object.getCodec (src/index.js:92:17)
      at Context.it (test/test.js:132:31)

  3) content-hash
       skynet
         should decode:
     RangeError: Could not decode varint
      at Object.read [as decode] (node_modules/varint/decode.js:17:13)
      at Object.exports.getCodec (node_modules/multicodec/src/index.js:61:23)
      at Object.decode (src/index.js:39:24)
      at Context.it (test/test.js:136:31)

NOTE: When I updated multicodec to 2.0.0, it raised all sorts of different errors.

[brantlymillegan]

@peterjanbrone Are you able to help us resolve this? We'd love to add Sia support

[brantlymillegan]

Ok, from what I can gather from our Discord discussion, to get SIA support in our Content record, we need to first get SIA support in multicodec, which will allow us to add it to content-hash, which will allow us to add it to our Manager for the Content record. The main block is multicodec, which is here multiformats/multicodec#198

[brantlymillegan]

Ok, SIA is now included in multicodec. Anything else we need to do to get this merged and get SIA available for our Content record? @makoto

[peterjan]

This update causes a bunch of test failures. It seems that the format changed causing breakage in most if not all of the encode-decode functions. Not sure what to do here.

[peterjan]

This is still not working, even after updating all of the multicodec libraries. It's not working because obviously it depends on the cids package which we have not updated. Before going further I want to first make sure we even need a CID? I am not aware on what that is and why we would need it.

More information here as well: multiformats/multicodec#198

[makoto]

skynet-ns which you added into multicodec looks like a protocode (or namespace), but CID seems taking content type which you didn't seem to add as swarm team added

This is swarm

And this is Skynet

[makoto]

Before going further I want to first make sure we even need a CID? I am not aware on what that is and why we would need it.

I think we do, otherwise we won't be able to differentiate whether which protocol the given data is and CID seems prepending these protocol names.

More detail is on https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1577.md

[makoto]

You need to update this to the latest (1.1.5) as it also has dependencies to multicodec.

[makoto]

Once updated, you also have to change CID to use bytes instead of buffer (looks like they changed interface)

[peterjan]

this can be closed as it was done in #7