const BlockService = require('ipfs-block-service')

const BlockService = require('ipfs-block-service')
const Block = require('ipld-block')
const multihashing = require('multihashing-async')
const IPFSRepo = require('ipfs-repo')  // storage repo
const uint8ArrayEquals = require('uint8arrays/equals')
const uint8ArrayFromString = require('uint8arrays/from-string')

// setup a repo
const repo = new IPFSRepo('example')

// create a block
const data = uint8ArrayFromString('hello world')
const multihash = await multihashing(data, 'sha2-256')

const cid = new CID(multihash)
const block = new Block(data, cid)

// create a service
const service = new BlockService(repo)

// add the block, then retrieve it
await service.put(block)

const result = await service.get(cid)
console.log(uint8ArrayEquals(block.data, result.data))
// => true

var BlockService = require('ipfs-block-service')