elcid.js

const multihashing = require('multihashing-async')
const CID = require('cids')
const mh = require('multihashing')

// data - Buffer or string, the data to encode
// hashtype - string
// codec - string, 'dag-pb' or 'dag-cbor', one
// callback - called with (Error, CID) depending on the result
function elcidEncode (data, hashtype, codec, callback) {
  if (typeof data === 'string') {
    data = new Buffer(data)
  }
  multihashing(data, hashtype, (err, digest) => {
    if (err) {
      return callback(err)
    }
    
    callback(null, new CID(1, codec, digest))
  })
}

// data - Buffer or string, the data to decode
function elcidDecode (data) {
  const cid = new CID(data)
  return {
    hashType: mh.decode(cid.multihash).name
    codec: cid.codec,
    data: cid.multihash.toString('hex')
  }
}