const HypercoreEncryption = require('hypercore-encryption')

const encryption = new HypercoreEncryption({
  blindingKey,
  getBlockKey (id, contexxt) {
    // get key info corresponding to id and context...

    return {
      version, // encryption scheme
      padding, // padding byte length
      key // block key
    }
  }
})

const core = new Hypercore(storage, { encryption })
await core.ready()

await core.append('encrypt with key 1')

await encryption.load(99)

await core.append('encrypt with key 99')

function getBlockKey (id, context) {
  // context provides information about the core, eg:
  //   context.key
  //   context.manifest

  // id id is passed as -1, the module expects the key to be updated

  return {
    version, // encryption scheme
    padding, // padding byte length
    key // block key
  }
}

function getBlockKey (context) {
  return blindingKey // 32 byte blinding key
}