ipfs-only-hash/index.js

Just enough code to calculate the IPFS hash for some data

const { importer } = require('ipfs-unixfs-importer')

const block = {
  get: async cid => { throw new Error(`unexpected block API get for ${cid}`) },
  put: async () => { throw new Error('unexpected block API put') }
}

exports.of = async (content, options) => {
  options = options || {}
  options.onlyHash = true

  if (typeof content === 'string') {
    content = new TextEncoder().encode(content)
  }

  let lastCid
  for await (const { cid } of importer([{ content }], block, options)) {
    lastCid = cid
  }

  return `${lastCid}`
}